Welding Defects
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I used this to train QA/QC Engineers in Asia, what defects are and the possible effects they can have on the finished products.
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Weld Defects
This document discusses various types of welding defects and imperfections including lack of fusion, porosity, slag inclusions, and solidification cracking. It describes how to identify each type, their causes, best practices for prevention, acceptance standards, and methods for detection and remediation. The key types of imperfections are classified as fabrication defects occurring during welding or service defects that form during use, and guidelines are provided for minimizing defects and producing quality welds.
Wis5 welding defects 02
The document discusses various welding defects that can be visually detected, including cracks, lack of solid metal, lack of fusion, lack of smoothly blended surfaces, and miscellaneous defects. It provides details on different types of each defect, their causes, and methods for prevention. It also discusses welding repairs, noting that repairs require authorization and testing to ensure defects have been fully removed before performing the repair weld.
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The document discusses weld defect acceptance criteria according to different codes such as ASTM B31.1, ASME VIII, ASME B31.3, and AWS D1.1. It provides details on acceptance limits for various weld defects depending on the examination method, material thickness, loading conditions, and material application. Defects discussed include cracks, lack of fusion, incomplete penetration, undercuts, porosity, and reinforcement. Acceptance criteria include maximum defect sizes, numbers of defects allowed, cumulative lengths of defects, and distances between defects.
ASME SEC IX PPT.pdf
The document summarizes the key aspects of ASME Section IX (Ed. 2019), which contains requirements for welding procedure and performance qualifications. It discusses the history and timeline of ASME standards development. It also provides an overview of the various articles within ASME Section IX, including Article I on general welding requirements, Article II on welding procedure qualification, Article III on welding performance qualification, and Article IV on welding data. Key terms like essential variables, P-numbers, F-numbers, and A-numbers used for material grouping are also defined in the document.
Welding Inspection
The Certified Welding Inspector (CWI) plays an important role during any welded construction activities ensuring the required specifications and standards are followed. Due to the numerous materials and processes associated with metal joining (welding) THIS PRESENTATION SHALL SHOW ONLY THE BASIC WELDING PROCESSES AND EXAMINATION METHODS (NDE). National and International Codes and Specifications along with measuring devices are the Inspector’s tools. Hopefully the following presentation shall give an insight into basic welding inspection.
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This document provides information on welding inspection and defects/repairs. It discusses various types of welding defects such as cracks, inclusions, lack of fusion, porosity and undercut. Specific defects like longitudinal cracks, slag inclusions, gas pores, overlap and lack of sidewall fusion are defined and illustrated. Potential causes of defects are provided. The document also covers inspection of parent materials, weld repairs and includes sample questions related to defects and repairs.
How to Qualify a Welding Procedure
The document outlines the five step process to qualify a welding procedure according to ASME Section IX. It provides details on developing a draft procedure using 0.75" A36 steel plate welded in the flat position using GTAW and GMAW. Variables such as joint design, base metal and thickness, filler metal type and size, welding position, and electrical parameters are documented. The qualification weld was tested to verify it results in an acceptable weld with proper mechanical properties before the welding procedure specification can be used in construction.
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Weld Defects
This document discusses various types of welding defects and imperfections including lack of fusion, porosity, slag inclusions, and solidification cracking. It describes how to identify each type, their causes, best practices for prevention, acceptance standards, and methods for detection and remediation. The key types of imperfections are classified as fabrication defects occurring during welding or service defects that form during use, and guidelines are provided for minimizing defects and producing quality welds.
Wis5 welding defects 02
The document discusses various welding defects that can be visually detected, including cracks, lack of solid metal, lack of fusion, lack of smoothly blended surfaces, and miscellaneous defects. It provides details on different types of each defect, their causes, and methods for prevention. It also discusses welding repairs, noting that repairs require authorization and testing to ensure defects have been fully removed before performing the repair weld.
criteria of weld defects
The document discusses weld defect acceptance criteria according to different codes such as ASTM B31.1, ASME VIII, ASME B31.3, and AWS D1.1. It provides details on acceptance limits for various weld defects depending on the examination method, material thickness, loading conditions, and material application. Defects discussed include cracks, lack of fusion, incomplete penetration, undercuts, porosity, and reinforcement. Acceptance criteria include maximum defect sizes, numbers of defects allowed, cumulative lengths of defects, and distances between defects.
ASME SEC IX PPT.pdf
The document summarizes the key aspects of ASME Section IX (Ed. 2019), which contains requirements for welding procedure and performance qualifications. It discusses the history and timeline of ASME standards development. It also provides an overview of the various articles within ASME Section IX, including Article I on general welding requirements, Article II on welding procedure qualification, Article III on welding performance qualification, and Article IV on welding data. Key terms like essential variables, P-numbers, F-numbers, and A-numbers used for material grouping are also defined in the document.
Welding Inspection
The Certified Welding Inspector (CWI) plays an important role during any welded construction activities ensuring the required specifications and standards are followed. Due to the numerous materials and processes associated with metal joining (welding) THIS PRESENTATION SHALL SHOW ONLY THE BASIC WELDING PROCESSES AND EXAMINATION METHODS (NDE). National and International Codes and Specifications along with measuring devices are the Inspector’s tools. Hopefully the following presentation shall give an insight into basic welding inspection.
WPS & WPQ
Welding Procedure Specification and Welder approval based on
AWS D.1.1: Structural Steel Welding Code
ASME IX: Welding and Brazing Qualifications
API 1104: Welding of Pipelines
dokumen.tips_5-weld-defect-repair.ppt
This document provides information on welding inspection and defects/repairs. It discusses various types of welding defects such as cracks, inclusions, lack of fusion, porosity and undercut. Specific defects like longitudinal cracks, slag inclusions, gas pores, overlap and lack of sidewall fusion are defined and illustrated. Potential causes of defects are provided. The document also covers inspection of parent materials, weld repairs and includes sample questions related to defects and repairs.
How to Qualify a Welding Procedure
The document outlines the five step process to qualify a welding procedure according to ASME Section IX. It provides details on developing a draft procedure using 0.75" A36 steel plate welded in the flat position using GTAW and GMAW. Variables such as joint design, base metal and thickness, filler metal type and size, welding position, and electrical parameters are documented. The qualification weld was tested to verify it results in an acceptable weld with proper mechanical properties before the welding procedure specification can be used in construction.
Welding defects
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Radiographic interpretation
This document provides definitions for various defects that may appear on radiographic images of welds, including:
- Excessive root penetration appears as a light irregular band within the weld image.
- Root concavity appears as dark areas along the weld center varying in density by imperfection depth.
- Incomplete filled groove appears as a dark area at the weld center with diffuse edges.
- Cracks appear as dark, fine lines that are usually diffuse or discontinuous.
9488085 welding-defects
The document discusses various types of discontinuities and defects that can occur in welding, including cracks, porosity, inclusions, insufficient penetration, and more. It defines discontinuities as interruptions in material structure that are not necessarily defects, while defects render a part unable to meet standards. Causes, preventions, and potential repairs are provided for each issue. Engineering problems can arise from design mistakes, while weld process issues relate to techniques and metallurgy.
radiographer-s-weld-interpretation-reference
The document provides descriptions of common welding defects along with their corresponding radiographic images. It describes 14 different types of defects including misalignments, lack of penetration, inclusions, cracks, and more. Each defect entry explains what it is, such as offset or mismatch being a misalignment of pieces to be welded, and describes its radiographic image appearance, such as an abrupt change in film density across the weld image width. In total, it covers 14 common welding defects and their radiographic signatures for non-destructive testing interpretation.
Welding defects
This document provides a classification and overview of common welding defects. It divides defects into three main categories: planar defects, linear volumetric defects, and non-planar defects. Examples of each type of defect are given. The document also describes specific defect types such as cracks, inclusions, lack of fusion, porosity, overlap, undercut and provides potential causes of each.
Welding defects
This document discusses welding defects and welding processes. It describes various types of welding including arc welding, gas welding, resistance welding, thermit welding, solid state welding, and newer welding techniques. It then discusses common welding defects such as slag inclusion, undercut, porosity, incomplete fusion, overlap, underfill, spatter, excessive convexity/concavity, excessive weld reinforcement, incomplete penetration, and excessive penetration. For each defect it provides the potential causes and recommendations for prevention and repair.
Welding Inspection Cswip
The document discusses key terminology and concepts related to welding inspection. Some key points:
- It defines different types of welds (e.g. butt weld, fillet weld), joints (e.g. butt, tee, lap), and weld zones (e.g. weld metal, heat affected zone).
- It discusses joint preparation details like bevel angles, root faces, gaps for different joint types (e.g. single V, single J).
- It covers features of fillet welds like leg length, throat thickness, and how they relate. Leg length and throat thickness determine weld strength.
- It also discusses duties of a welding inspector like observing welding, recording
Weld defects 1
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Welder qualification
This document provides information on the essential variables and requirements for welder qualification according to ASME Section IX. It lists the key variables that must be specified for a welder qualification, including welding process, type, base metal, filler metal, and weld thickness limits. It also outlines the qualification requirements and limitations for weld position, diameter, progression, backing, and which filler and base metals a welder is qualified to use based on their test.
Welding Defects.pdf
There are numerous welding processes including arc welding, electron beam welding,
friction welding, laser welding, and resistance welding. This article will concentrate on arc
welding, which is the most common technique used to join most steels. Factors affecting
weld quality will be discussed and how to avoid common weld defects will be presented.
Arc welding requires striking a low-voltage, high-current arc between an electrode and the
base metal. The intense heat generated with this arc melts the base metal and allows the
joining of two components. The characteristic of the metal that is being welded and the joint
type (i.e. groove, fillet, etc.) dictates the welding parameters and the procedure that needs to
be followed to obtain a sound weld joint.
Cswip welding inspection notes and questions
The document discusses the duties of a welding inspector, including visual inspection of welds to identify defects and ensure they meet acceptance criteria. It describes tools that can aid inspection like magnification lenses. It outlines a code of practice for an inspection department, including checking documents, materials, equipment and welder qualifications before welding, monitoring the welding process and variables during welding, and inspecting the final weld for defects, dimensions and heat treatment after welding. Repairs should follow an authorized procedure and be re-inspected upon completion.
Presentation on wpqr wps asme_ix
This document provides a summary of Module 7, which covers Weld Procedure Qualification according to ASME Section IX. It discusses the 5 step process for qualifying a welding procedure and the variables that must be addressed in the Procedure Qualification Record (PQR). These include joint design, base metal, filler metal, position, preheat, post-weld heat treatment, gas, and electrical characteristics. An example procedure qualification is provided for a manual GTAW and GMAW weld on 0.75-inch thick A36 steel in the flat position, with no preheat or PWHT, using ER80S-D2 wire for GTAW and ER70S-6 wire for GMAW
Procedure qualification
This document defines key terms related to welder and procedure qualification including welding procedure specification (WPS), procedure qualification record (PQR), welder performance qualification (WPQ), essential variables, non-essential variables, and supplementary essential variables. It also summarizes requirements for PQR, WPS, and WPQ review and discusses validity, expiration, renewal of welder qualifications, welding repairs, and applicable Aramco engineering procedures.
Asmesectionix
ASME Section IX relates to welding qualifications and welding procedure specifications (WPS). It has requirements for qualifying welders and welding procedures. A WPS defines the welding variables for a procedure, while procedure qualification records (PQR) document the testing of welds made according to the WPS to ensure they meet mechanical property requirements. ASME Section IX specifies the welding positions, types of tests including tension tests and bend tests, acceptance criteria for test results, and classification of welding variables as essential or non-essential to determine whether requalification is needed if variables change.
Selection process of welding electrodes
This document discusses the selection process for different types of welding electrodes. It describes consumable electrodes that are classified based on their flux coatings to suit different arc characteristics, welding positions, and quality requirements. The key types of flux coatings include cellulosic, rutile, iron oxide, and basic low-hydrogen coatings. Important constituents in flux coatings like TiO2, CaCO3, and CaF2 are outlined. Guidelines for selecting electrode size based on current and coating factor are also provided. Classification systems for coated electrodes and guidelines for selecting between pure, thoriated, and zirconiated tungsten electrodes are summarized.
Twi welding training_6
The document provides guidance for welding inspectors taking the CSWIP 3.1 practical examination. It outlines the requirements for conducting visual inspections of plate and pipe test welds, including completing thumbprint sketches and final reports. Candidates must observe and report all imperfections, take accurate measurements, and compare their findings to code acceptance criteria. The document reviews welding imperfections, specialized gauges for measurements, and the reporting formats and evaluation standards required by the CSWIP exam.
Welding defects
This document discusses various welding defects such as slag inclusion, undercut, porosity, incomplete fusion, overlap, underfill, spatter, excessive convexity, incomplete penetration, and excessive penetration. It provides the causes and ways to prevent or repair each defect. Nondestructive and destructive testing methods for inspecting welds are also summarized, including visual inspection, ultrasonic testing, radiographic testing, dye penetrant testing, magnetic particle testing, and mechanical tests.
Asme sec ix overview
This document provides an introduction to ASME Section IX, which establishes general guidelines for welding procedure and welder performance qualifications. It discusses the requirements for qualifying welding procedures using procedure qualification records (PQRs) and welding procedure specifications (WPSs). The key points covered include:
- ASME Section IX covers the qualification of welding and brazing procedures.
- Welding procedure qualifications demonstrate that a set of welding variables can reliably produce sound welds.
- WPSs and PQRs are used to document and qualify welding procedures. A WPS must be supported by a qualified PQR to be used for production.
It also summarizes the classification of base metals using 'P' numbers,
CSWIP 3.2 New BOOK.pdf
The document outlines the duties and responsibilities of a Senior Welding Inspector. It discusses that the role requires strong leadership, technical, and managerial skills. Some key responsibilities include managing inspection teams, providing guidance to inspectors, making technical decisions, planning inspections, and ensuring work is completed on time and to budget. Senior Welding Inspectors must have in-depth knowledge of welding technology, quality standards, and the ability to audit work and evaluate non-destructive testing reports. Strong communication, organization, and people management skills are also important to motivate personnel and ensure high morale is maintained throughout inspection projects.
Welding Defects
The document discusses various welding defects including lamellar tearing, porosity, underfill, insufficient
penetration, wagon tracks, arc strikes, and incomplete fusion. Lamellar tearing occurs beneath welds in rolled steel
plate and is caused by transverse strain from welding, a weld orientation parallel to inclusions, and poor material
ductility. Porosity is caused by absorbed gases like nitrogen, oxygen, and hydrogen which become trapped during
solidification. Prevention methods for defects include using proper joint design, welding techniques, materials, and
preheating when necessary. Defects require removal and rewelding to repair.
Basic metallurgy for welding & fabricaton professionals
Eurotech Organizing 2 days "Metallurgy" Course is very beneficial for Welding and Fabrication professionals as it would results in increasing your efficiency. The course objectives are: metals and their properties, to check material test certificate, heat treatment process, Destructive testing, Stainless steel and types, and many more.
It will definitely increase your learning and your work efficiency and boost your career in welding
Please do not hesitate to contact me if you require further information Metallurgy" Course
Best Regards,
Puneet Sharma
Email: (aws.cwi.training@gmail.com)
Mobile no. 08196980555
Welding Defects
The document discusses common welding defects identified by Engr Muhammad Hussain, an inspection engineer at Global NDE Services Pvt. Ltd in Karachi. It lists undercut, porosity, incomplete fusion, overlap, underfill, spatter, excessive convexity, excessive concavity, excessive weld reinforcement, incomplete penetration, excessive penetration, and unacceptable weld profiles as defects addressed by Engr Hussain in his role.
Contenu connexe
Tendances
Welding defects
The document discusses the results of a study on the impact of COVID-19 lockdowns on air pollution. Researchers analyzed data from dozens of countries and found that lockdowns led to an average decline of nearly 30% in nitrogen dioxide levels over cities. However, they also observed that this improvement was temporary and air pollution rebounded once lockdown restrictions began lifting. Overall, the study highlights how human activities are a major driver of air pollution but also that systemic changes are needed for long-term air quality improvements.
Radiographic interpretation
This document provides definitions for various defects that may appear on radiographic images of welds, including:
- Excessive root penetration appears as a light irregular band within the weld image.
- Root concavity appears as dark areas along the weld center varying in density by imperfection depth.
- Incomplete filled groove appears as a dark area at the weld center with diffuse edges.
- Cracks appear as dark, fine lines that are usually diffuse or discontinuous.
9488085 welding-defects
The document discusses various types of discontinuities and defects that can occur in welding, including cracks, porosity, inclusions, insufficient penetration, and more. It defines discontinuities as interruptions in material structure that are not necessarily defects, while defects render a part unable to meet standards. Causes, preventions, and potential repairs are provided for each issue. Engineering problems can arise from design mistakes, while weld process issues relate to techniques and metallurgy.
radiographer-s-weld-interpretation-reference
The document provides descriptions of common welding defects along with their corresponding radiographic images. It describes 14 different types of defects including misalignments, lack of penetration, inclusions, cracks, and more. Each defect entry explains what it is, such as offset or mismatch being a misalignment of pieces to be welded, and describes its radiographic image appearance, such as an abrupt change in film density across the weld image width. In total, it covers 14 common welding defects and their radiographic signatures for non-destructive testing interpretation.
Welding defects
This document provides a classification and overview of common welding defects. It divides defects into three main categories: planar defects, linear volumetric defects, and non-planar defects. Examples of each type of defect are given. The document also describes specific defect types such as cracks, inclusions, lack of fusion, porosity, overlap, undercut and provides potential causes of each.
Welding defects
This document discusses welding defects and welding processes. It describes various types of welding including arc welding, gas welding, resistance welding, thermit welding, solid state welding, and newer welding techniques. It then discusses common welding defects such as slag inclusion, undercut, porosity, incomplete fusion, overlap, underfill, spatter, excessive convexity/concavity, excessive weld reinforcement, incomplete penetration, and excessive penetration. For each defect it provides the potential causes and recommendations for prevention and repair.
Welding Inspection Cswip
The document discusses key terminology and concepts related to welding inspection. Some key points:
- It defines different types of welds (e.g. butt weld, fillet weld), joints (e.g. butt, tee, lap), and weld zones (e.g. weld metal, heat affected zone).
- It discusses joint preparation details like bevel angles, root faces, gaps for different joint types (e.g. single V, single J).
- It covers features of fillet welds like leg length, throat thickness, and how they relate. Leg length and throat thickness determine weld strength.
- It also discusses duties of a welding inspector like observing welding, recording
Weld defects 1
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise has also been shown to increase gray matter volume in the brain and reduce risks for conditions like Alzheimer's and dementia.
Welder qualification
This document provides information on the essential variables and requirements for welder qualification according to ASME Section IX. It lists the key variables that must be specified for a welder qualification, including welding process, type, base metal, filler metal, and weld thickness limits. It also outlines the qualification requirements and limitations for weld position, diameter, progression, backing, and which filler and base metals a welder is qualified to use based on their test.
Welding Defects.pdf
There are numerous welding processes including arc welding, electron beam welding,
friction welding, laser welding, and resistance welding. This article will concentrate on arc
welding, which is the most common technique used to join most steels. Factors affecting
weld quality will be discussed and how to avoid common weld defects will be presented.
Arc welding requires striking a low-voltage, high-current arc between an electrode and the
base metal. The intense heat generated with this arc melts the base metal and allows the
joining of two components. The characteristic of the metal that is being welded and the joint
type (i.e. groove, fillet, etc.) dictates the welding parameters and the procedure that needs to
be followed to obtain a sound weld joint.
Cswip welding inspection notes and questions
The document discusses the duties of a welding inspector, including visual inspection of welds to identify defects and ensure they meet acceptance criteria. It describes tools that can aid inspection like magnification lenses. It outlines a code of practice for an inspection department, including checking documents, materials, equipment and welder qualifications before welding, monitoring the welding process and variables during welding, and inspecting the final weld for defects, dimensions and heat treatment after welding. Repairs should follow an authorized procedure and be re-inspected upon completion.
Presentation on wpqr wps asme_ix
This document provides a summary of Module 7, which covers Weld Procedure Qualification according to ASME Section IX. It discusses the 5 step process for qualifying a welding procedure and the variables that must be addressed in the Procedure Qualification Record (PQR). These include joint design, base metal, filler metal, position, preheat, post-weld heat treatment, gas, and electrical characteristics. An example procedure qualification is provided for a manual GTAW and GMAW weld on 0.75-inch thick A36 steel in the flat position, with no preheat or PWHT, using ER80S-D2 wire for GTAW and ER70S-6 wire for GMAW
Procedure qualification
This document defines key terms related to welder and procedure qualification including welding procedure specification (WPS), procedure qualification record (PQR), welder performance qualification (WPQ), essential variables, non-essential variables, and supplementary essential variables. It also summarizes requirements for PQR, WPS, and WPQ review and discusses validity, expiration, renewal of welder qualifications, welding repairs, and applicable Aramco engineering procedures.
Asmesectionix
ASME Section IX relates to welding qualifications and welding procedure specifications (WPS). It has requirements for qualifying welders and welding procedures. A WPS defines the welding variables for a procedure, while procedure qualification records (PQR) document the testing of welds made according to the WPS to ensure they meet mechanical property requirements. ASME Section IX specifies the welding positions, types of tests including tension tests and bend tests, acceptance criteria for test results, and classification of welding variables as essential or non-essential to determine whether requalification is needed if variables change.
Selection process of welding electrodes
This document discusses the selection process for different types of welding electrodes. It describes consumable electrodes that are classified based on their flux coatings to suit different arc characteristics, welding positions, and quality requirements. The key types of flux coatings include cellulosic, rutile, iron oxide, and basic low-hydrogen coatings. Important constituents in flux coatings like TiO2, CaCO3, and CaF2 are outlined. Guidelines for selecting electrode size based on current and coating factor are also provided. Classification systems for coated electrodes and guidelines for selecting between pure, thoriated, and zirconiated tungsten electrodes are summarized.
Twi welding training_6
The document provides guidance for welding inspectors taking the CSWIP 3.1 practical examination. It outlines the requirements for conducting visual inspections of plate and pipe test welds, including completing thumbprint sketches and final reports. Candidates must observe and report all imperfections, take accurate measurements, and compare their findings to code acceptance criteria. The document reviews welding imperfections, specialized gauges for measurements, and the reporting formats and evaluation standards required by the CSWIP exam.
Welding defects
This document discusses various welding defects such as slag inclusion, undercut, porosity, incomplete fusion, overlap, underfill, spatter, excessive convexity, incomplete penetration, and excessive penetration. It provides the causes and ways to prevent or repair each defect. Nondestructive and destructive testing methods for inspecting welds are also summarized, including visual inspection, ultrasonic testing, radiographic testing, dye penetrant testing, magnetic particle testing, and mechanical tests.
Asme sec ix overview
This document provides an introduction to ASME Section IX, which establishes general guidelines for welding procedure and welder performance qualifications. It discusses the requirements for qualifying welding procedures using procedure qualification records (PQRs) and welding procedure specifications (WPSs). The key points covered include:
- ASME Section IX covers the qualification of welding and brazing procedures.
- Welding procedure qualifications demonstrate that a set of welding variables can reliably produce sound welds.
- WPSs and PQRs are used to document and qualify welding procedures. A WPS must be supported by a qualified PQR to be used for production.
It also summarizes the classification of base metals using 'P' numbers,
CSWIP 3.2 New BOOK.pdf
The document outlines the duties and responsibilities of a Senior Welding Inspector. It discusses that the role requires strong leadership, technical, and managerial skills. Some key responsibilities include managing inspection teams, providing guidance to inspectors, making technical decisions, planning inspections, and ensuring work is completed on time and to budget. Senior Welding Inspectors must have in-depth knowledge of welding technology, quality standards, and the ability to audit work and evaluate non-destructive testing reports. Strong communication, organization, and people management skills are also important to motivate personnel and ensure high morale is maintained throughout inspection projects.
Welding Defects
The document discusses various welding defects including lamellar tearing, porosity, underfill, insufficient
penetration, wagon tracks, arc strikes, and incomplete fusion. Lamellar tearing occurs beneath welds in rolled steel
plate and is caused by transverse strain from welding, a weld orientation parallel to inclusions, and poor material
ductility. Porosity is caused by absorbed gases like nitrogen, oxygen, and hydrogen which become trapped during
solidification. Prevention methods for defects include using proper joint design, welding techniques, materials, and
preheating when necessary. Defects require removal and rewelding to repair.
Tendances (20)
En vedette
Basic metallurgy for welding & fabricaton professionals
Eurotech Organizing 2 days "Metallurgy" Course is very beneficial for Welding and Fabrication professionals as it would results in increasing your efficiency. The course objectives are: metals and their properties, to check material test certificate, heat treatment process, Destructive testing, Stainless steel and types, and many more.
It will definitely increase your learning and your work efficiency and boost your career in welding
Please do not hesitate to contact me if you require further information Metallurgy" Course
Best Regards,
Puneet Sharma
Email: (aws.cwi.training@gmail.com)
Mobile no. 08196980555
Welding Defects
The document discusses common welding defects identified by Engr Muhammad Hussain, an inspection engineer at Global NDE Services Pvt. Ltd in Karachi. It lists undercut, porosity, incomplete fusion, overlap, underfill, spatter, excessive convexity, excessive concavity, excessive weld reinforcement, incomplete penetration, excessive penetration, and unacceptable weld profiles as defects addressed by Engr Hussain in his role.
weldability and defects in weldments
This document discusses weldability and defects in weldments. It covers various topics related to weld design, residual stresses, weld defects, and the weldability of different materials such as steels, aluminum alloys, copper alloys, titanium alloys, and magnesium alloys. The objectives are for students to understand causes of residual stresses and distortions, differentiate between weld defects, and suggest remedies. Weldability depends on factors like material composition and welding techniques. Some materials like steel are more weldable than others such as aluminum.
Cswip 3.1 question & Answers
1. The document contains multiple choice questions about welding processes and procedures. It covers topics like weld defects, preheat requirements, welding consumables, inspection methods, and weld quality standards.
2. Many questions relate to ensuring proper joint quality and avoiding defects like cracking or lack of fusion by following welding procedure specifications.
3. Other topics addressed include distortion control, heat input effects, and qualification testing requirements.
Question bank
This document provides information on the design of pressure vessels. It defines pressure vessels as containers designed to operate above 15 Psi and discusses why proper design is important to prevent failure. The document outlines various codes used for pressure vessel design and stresses that vessels experience from internal pressure, weight, and other loads. It also describes common pressure vessel components like shells, heads, nozzles, and supports, and provides formulas for calculating thicknesses of different vessel components.
Piping basics knowledge
This document provides an overview of piping fundamentals for fresher engineers. It discusses what a piping system is, components like pipes, fittings, valves, supports and insulation. It also covers piping layout, modeling software, stress analysis, sizing calculations considering flow rates, pressures and material selection based on fluid properties. Critical high pressure and temperature piping in power plants requires special design considerations for material selection and allowing for expansion.
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Piping Training course-How to be an Expert in Pipe & Fittings for Oil & Gas c...
Course Description
Piping a must know skill to work in Oil & Gas and similar Process Industries.
Oil and Gas industry is become a very competitive in the current time. Getting right mentor and right exposer within industry is difficult. With limited training budget spent by company on employee training, it is difficult to acquire the knowledge to success.
Knowing cross-functional skill give you an edge over others in your career success.
This course design based on years of field experience to ensure student will comprehend technical details easily and enjoy overall journey.
Learn in detail every aspect of Pipe & Pipe Fittings used in process industry
•Different types of Pipe, Pipe fittings (Elbow, Tee, reducers, Caps etc.), Flanges, Gaskets, Branch Connection, Bolting materials
•Materials (Metal-Carbon Steel, Stainless Steel, Alloy Steel etc. Non-Metal- PVC/VCM, HDPE, GRE-GRP etc.)
•Manufacturing methods
•Heat treatment requirements
•Inspection and Testing requirements (Non Destructive Testing, Mechanical & Chemical testing)
•Dimensions & Markings requirements
•Code & Standard used in piping
Content and Overview
With 2 hours of content including 30 lectures & 8 Quizzes, this course cover every aspect of Pipe, Pipe fittings, flanges, gaskets, branch connections and bolting material used in Process Piping.
This Course is divided in three parts.
1st part of the course covers fundamental of process industries. In this Part, you will learn about fundamental process piping. You will also learn about Code, Standard & Specification used in process industries.
2nd part cover various types of material used in process industries. In this part, you will learn about Metallic and Non-Metallic material used to manufacture pipe and other piping components.
3rd parts covers in detail about pipe and piping components used in Process piping. In this part we will learn about Industry terminology of Piping components, types of industrial material grade used in manufacturing and entire manufacturing process of these components. You will learn about different manufacturing methods, Heat treatment requirements, Destructive and Non-destructive testing, Visual & Dimensional inspection and Product marking requirements.
Upon completion, you will be able to use this knowledge direct on your Job and you can easily answer any interview question on pipe & fittings.
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Basic metallurgy for welding & fabricaton professionals
Basic metallurgy for welding & fabricaton professionals
Piping Training course-How to be an Expert in Pipe & Fittings for Oil & Gas c...
Piping Training course-How to be an Expert in Pipe & Fittings for Oil & Gas c...
Similaire à Welding Defects
Defects and Discontinuities
The document discusses various types of defects and discontinuities that can occur in welds, including cracks, inclusions, insufficient penetration, and improper reinforcement. It defines each issue, describes potential causes and preventative measures, and outlines repair procedures when necessary. Weld defects can arise from factors like inadequate joint preparation, improper welding techniques, lack of preheat, and contamination. Careful work and following standards are emphasized to produce welds free of defects.
Welding Defects (1).ppt
This document defines and describes various defects and discontinuities that can occur in welded joints, including cracks, inclusions, lack of penetration, and improper weld geometry. It explains the causes and prevention methods for each type of defect, as well as repair procedures where possible. The document provides detailed information on defect identification and characterization to help ensure the quality of welded structures.
Analysis of Welding Defects
This document provides an analysis of welding defects including a discussion of various types of defects such as misalignment, undercut, insufficient fill, porosity, cracks, and inclusions. It defines each defect, describes potential causes and how to prevent and repair the defect. The document aims to educate welders on identifying and addressing common welding defects.
Welding
1. Various weld defects such as undercut, lack of penetration, porosity, and cracks can occur during welding. Proper joint preparation and welding technique are important to prevent defects.
2. Common weld defects include undercut, lack of penetration, porosity, cracks, and incorrect weld contours. The causes and remedies for each defect are described.
3. Improper welding techniques are a major cause of defects like undercut and lack of penetration. Following correct procedures for joint preparation, parameters, and technique can help avoid defects. Defects may require repair by rewelding or grinding.
Welding technology
This document discusses various types of weld discontinuities and defects including misalignment, undercut, insufficient fill, excessive reinforcement, overlap, burn-through, incomplete penetration, incomplete fusion, arc strikes, and inclusions such as slag, wagontracks, and tungsten. Each discontinuity or defect is defined, potential causes are identified, methods for prevention are provided, and repair techniques are described. The document serves as a reference for identifying and addressing common weld problems and defects.
welding defects observed during the welding
In the dimly lit conference room, the hum of anticipation fills the air as the audience settles into their seats, eager to delve into the intricate world of welding defects. The projector flickers to life, casting a brilliant glow onto the screen, where a meticulously crafted slide presentation awaits. Each slide is a gateway into the complex realm of welding imperfections, a journey through the pitfalls and challenges faced by welders every day.
The first slide materializes, its title bold and commanding: "Understanding Welding Defects." As the presenter begins to unravel the intricacies of the topic, images of porosity dance across the screen, their irregular patterns a stark reminder of the importance of proper gas shielding. The audience leans in, captivated by the visual representation of gas pockets trapped within the weld, a flaw that compromises structural integrity.
Transitioning to the next slide, the focus shifts to another common defect: lack of fusion. Here, the audience is confronted with images of incomplete weld penetration, a consequence of inadequate heat input or improper technique. As the presenter elaborates on the causes and consequences of this flaw, murmurs of realization ripple through the room, punctuated by nods of understanding.
With each successive slide, the presentation delves deeper into the myriad challenges encountered in the world of welding. Cracks, undercutting, and spatter are dissected with precision, their origins and implications laid bare for all to see. Through meticulously curated visuals and insightful commentary, the audience gains a newfound appreciation for the complexities of the craft.
Yet, amidst the exploration of defects, a thread of optimism weaves its way through the presentation. Each flaw serves not only as a cautionary tale but also as an opportunity for growth and improvement. As the presenter concludes the presentation, the final slide emblazoned with the words "Continuous Improvement," a sense of determination fills the room.
Armed with newfound knowledge and insight, the audience disperses, their minds buzzing with possibilities. For in the world of welding, as in life, it is not the presence of defects that defines us, but rather our ability to acknowledge them, learn from them, and emerge stronger as a result. And as the lights dim and the projector fades to black, the echoes of the presentation linger, a reminder of the power of knowledge and the promise of progress.
As the lights in the conference room slowly brightened, the audience departed with a renewed sense of purpose, their minds buzzing with newfound insights and their resolve strengthened to confront the complexities of welding defects head-on. And as they stepped out into the world beyond, they carried with them not only the lessons learned from the presentation but also the indomitable spirit of innovation and perseverance that defines the welding profession.
The presentation reached its climax and had to be finish
Welding defects
The document defines various defects and discontinuities that may occur in welds such as undercut, porosity, cracks, and lack of penetration. It provides the definitions, causes, prevention methods, and repair techniques for each. While discontinuities are not necessarily defects, any flaw that causes a part to not meet standards would be considered a defect and require repair, such as grinding or rewelding to correct issues. Proper welding technique and following applicable codes and standards are important to minimize defects.
000043
Dota 2 Game Dota 2 is a free-to-play multiplayer online battle arena (MOBA) video game developed and published by Valve Corporation. The game is the stand-alone sequel to Defense of the Ancients (DotA), which was a community-created mod for Blizzard Entertainment's Warcraft III: Reign of Chaos and its expansion pack, The Frozen Throne. Dota 2 is played in matches between two teams of five players, with each team occupying and defending their own separate base on the map. Each of the ten players independently controls a powerful character, known as a "hero", who all have unique abilities and differing styles of play. During a match, players collect experience points and items for their heroes in order to successfully battle the opposing team's heroes, who are attempting to do the same to them. A team wins by being the first to destroy a large structure located in the opposing team's base, called the "Ancient".
10Defects 1 DEMO.ppt
This document defines and describes common defects and discontinuities found in welded joints, including misalignment, undercut, insufficient fill, excessive/improper reinforcement, overlap, burn-through, porosity, slag, and spatter. For each issue, it provides the definition, potential causes, prevention methods, and repair approaches. The goal is to identify ways to avoid defects during welding and correct any issues that do occur.
WELD DEFECTS.pptx
The document defines various weld defects such as misalignment, undercut, reinforcement, slag inclusion, and spatter. It provides the definitions, causes, prevention methods, and repair procedures for each defect. Common weld defects include misalignment caused by carelessness or joining different thicknesses, undercut caused by high amperage or long arc length, and excessive reinforcement from slow travel speed or low amperage.
Welders visual inspection_handbook-2013_web
This document provides a handbook for visual inspection of welds. It includes sections on visual inspection responsibilities and techniques, definitions and images of common weld defects such as cracks, underfill, burn through, incomplete fusion, roughness, overlap, undersized fillets, incomplete penetration, undercut, corner melt, and end melt. Preventive and corrective actions are provided for each defect. The handbook also includes sections on measuring fillet weld size, types of weld joints, parts of a weld, welding symbols and joint numbering systems. It is intended to provide basic information for visual inspection of welds and is not a replacement for work procedures or other technical documents.
Presentation on common weld dicontinuities
The document discusses various common weld discontinuities and defects such as gas pores, slag inclusions, incomplete penetration, lack of fusion, cracks, and undercut. It describes the causes of these defects which can include trapped gas during solidification, contaminated base metal, improper welding parameters, and faulty joint preparation. Remedies suggested to avoid defects are ensuring adequate shielding from wind, using clean electrodes, maintaining the proper arc length, travel speed, and current level.
Me 328 welding metallurgy
The document discusses welding processes and their importance, types of welds and weld defects, including causes and methods of detection. It examines the microstructure of welds and defines features like the fusion zone, heat affected zone, and unaffected base metal zone. Various weld defects are described such as cracks, cavities, inclusions, lack of fusion/penetration, imperfect shape, and miscellaneous faults.
Casting defects
This document discusses common casting defects such as surface defects, internal defects, incorrect chemical composition, and unsatisfactory mechanical properties. It defines casting defects and explains how they reduce output and increase production costs. Specific defects covered include swell, fins, gas holes, shrinkage cavities, hot tears, and cold shuts. For each defect, the causes and remedies are described. Even in modern foundries, the rejection rate can be as high as 20% of total castings produced due to these defects.
Casting defects
This document discusses common casting defects such as surface defects, internal defects, incorrect chemical composition, and unsatisfactory mechanical properties. It defines casting defects as imperfections that do not meet quality specifications. Specific defects covered include swell, fins, gas holes, shrinkage cavities, hot tears, and cold shuts. For each defect, the causes and remedies are described. Overall, casting defects can reduce output, increase costs, and even lead to a rejection rate as high as 20% of total castings produced.
9 003
This document provides troubleshooting guidance for common problems with diamond saw blades, including loss of tension, segment loss, undercutting, uneven segment wear, excessive wear, cracked core, eccentricity, overheating, arbor hole issues, and blades that do not cut properly. For each problem, the document identifies potential causes and recommends remedies, such as using the proper blade for the material, ensuring proper water supply, and replacing worn parts. It aims to help users identify, diagnose, and correct diamond blade issues in the field.
Module 3
The document summarizes several welding processes:
- Gas tungsten arc welding (GTAW) is slow but requires a clean environment and high skill level. Contamination can cause porosity.
- Shielded metal arc welding (SMAW) has high deposition rates and can use different electrode and flux combinations. It is highly automated and produces less smoke than other processes.
- Oxy-acetylene welding (OAW) uses flame heat and requires a feathered edge joint preparation. It is relatively slow and requires high skill.
- Stud welding is fast, economical, and requires little skill. It is used in construction for attaching studs in a repetitive process.
Defects & Remedies inTHE FIRLD Welding.pdf
This document discusses various welding defects, their classification, and standards for acceptance. It describes defects such as cracks, porosities, lack of fusion, inclusions, and others. The International Institute of Welding (IIW) and ASTM have standards that classify defects based on their severity from minor deviations (green) to gross deviations (red) according to the IIW system. The standards specify which defects are allowed at different levels depending on the service requirements of the weld. Causes and prevention methods are provided for each type of defect.
WELD DEFECTS FOR VISUAL INSPECTION.pptx
This document discusses various welding defects and how to prevent them. It identifies the most common defects such as cracks, underfill, porosity, undercut, overlap, incomplete fusion, spatter, excessive penetration, incomplete root penetration, concave/convex fillet welds, offset, slag inclusions, and arc strikes. For each defect, it provides a definition and recommendations on how to avoid the defect through proper joint preparation, parameter adjustment, technique, cleaning, and equipment maintenance. The overall objective is to avoid defects through correct design, tools, procedures and operator training in order to improve productivity and reduce costs.
Module 9
This document discusses various types of discontinuities that can occur in welds and base metals. It defines discontinuities as irregularities that interrupt an otherwise uniform structure, and defines defects as discontinuities that impair suitability for intended use. Various discontinuities are described such as cracks, incomplete fusion, porosity, undercut, and laminations. Cracks are generally the most detrimental as they can propagate under stress. The shape, location, and causes of different discontinuities are explained to help identify and evaluate their severity. The document provides detailed information on discontinuities to aid in non-destructive testing and quality control of welds.
Similaire à Welding Defects (20)
Welding Defects
- 1. Defects and Discontinuities ESC DEFECTS TRAINING QA/QC
- 6. Misalignment
- 9. Under Cut
- 11. Under fill
- 13. Cause for Insufficient Fill at the Root Some liquids, like water or molten steel, try to cover as much surface area of whatever they are in contact with as possible. Welding a root pass too wide can also cause the bead to sag (overhead position).
- 16. Removing a root pass by grinding 1. Recreate the groove geometry as closely as possible. 2. Use a saw or die grinder and 1/16 - 1/8” cut off wheel to recreate root opening. Remember repairs are sometimes required to be made with a smaller electrode. 3. Open the groove angle. Be careful to leave the proper root face dimension. 4. Feather the start and stop to blend smoothly into and out of the existing weld.
- 19. Concavity
- 20. Root Concavity
- 21. Convexity
- 28. Overlap Overlap is measured with a square edge such as a 6” rule. No amount of overlap is typically allowed.
- 31. ICP
- 33. Lack of Side Wall Fusion
- 35. Arc Strike
- 36. Weld Spatter Causes Prevention High arc power Reduce arc power Magnetic arc blow Reduce arc length or switch to AC power Incorrect settings for GMAW process Modify electrical settings (but be careful to maintain full fusion Damp electrodes Use dry electrodes
- 39. Slag Inclusion
- 52. Toe Crack
- 54. Root Crack
- 58. Cold Crack or Weld Metal Hydrogen Crack
- 61. Lamellar Tearing
- 63. Lamination effects can be reduced by joint design:
- 64. Laps and Seams A mill-induced discontinuity in which results from a lump of metal being squeezed over into the surface of the material. If beyond acceptable limits, must be removed and repaired or discarded.
- 66. Porosity
- 77. Only repair defects. Discontinuities are by definition acceptable. Repair is therefore unnecessary and not cost effective.
Notes de l'éditeur
- Maybe have picture of over reinforced but weld
- Carelessness = lazyness just sounds less aggressive? WORKMANSHIP= STUPID ####
- Explain about dogs and wedges and how to remove and repair!! If the weld is 100% pen no worries apart from ugly!!
- Reinforce about the correct settings!! The ER70S-6 has high silicon because Malaysia only uses co2 whish needs more deoxidants.
- This needs to be explained for on site bridge abutments