4. 1-1. Introduction & Contact Information
Introduction
Sejin Tube Tech Co., Ltd. was established in 2005 and we are a manufacturer of Stainless Steel
Tube for Boiler, Heat Exchanger, Ordinary piping, Machinery, Structure, Sanitary tubing, etc.
We’ve been continuously grown through a good reputation and the endless technical development.
Now we’re expanding our market to the international as we obtain the international certificates and
the unique technologies.
We, Sejin Tube Tech Co., Ltd. promise our customers to go ahead as a front-runner of the Stainless
Steel Pipe Manufacturer in the world market as well as in the domestic market while collecting the
accumulated Know-How and capability. Thank you.
Contact Information
• Company Name : Sejin Tube Tech Co., Ltd.
• Representative : Myung Chol Kim
• Address : 239-1, Gamno-ri, Sangdong-Myeon, Gimhae-si, Gyeong Nam, Korea 621-811
• TEL : +82-55-337-0041 / FAX : +82-55-337-0042
• Website : www.sejintube.co.kr
• E-Mail : sejintube@sejintube.co.kr
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5. 1-2. Company History
May. 2005 Established Sejin Tube Tech Co., Ltd.
May. 2005 Acquired Patent for Stainless Arc Welding
Jan. 2006 Acquired ISO 9001:2000 certificate
Feb. 2006 Extended the Line for Boiler & Heat Exchanger Tube (2 Lines)
Nov. 2006 Completion of the 2nd shop (Pipe Line & Off-Line Oxidized Heat Treatment)
Jan. 2007 Seamless Tube Line extension (Plug Draw Bench).
Jan. 2007 Registered as a member of Korea Standard Association.
Apr. 2007 Registered as a supplier to Jord International Pty Ltd.(Australia)
Jun. 2007 Registered as a supplier to Mitsubishi Heavy Industries, Ltd.(Japan)
Aug. 2007 Acquired KS mark certificates (KS D3595, KS D3577)
May. 2008 Registered as a supplier of Sungjin Geotec, Wooyang H.C.,TSM Tech,
Hantech, Iljin Energy(Korea)
Nov. 2008 Registered as a supplier to DOW Chemical Company/Vectel
Mar. 2009 Registered as a supplier to Doosan Heavy Industries
Dec. 2010 Acquired PED Certificate
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7. 1-4. Organization
CEO
Managing
Director
Management
Sales Dpt. Production Dpt. QC Dpt.
Dpt.
Domestic Sales Production Accounting Inspection
Overseas Sales Purchasing General Affairs Development
Research
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8. 1-5. Company Profile(1)
Representative : Myung-Chol Kim
Founded Date : May 9, 2005
Number of Employees : Total 28 people
• Office : 6 people
• Engineer : 2 people
• Factory : 20 people
Capital(2010) : USD7,500,000
Sales Amount(2010) : USD12,500,000
Main Product : Welded Stainless Tube, Seamless Stainless Tube
Usage : Boiler, Heat Exchanger, Anti-corrosion & Heat-resistant Pipes,
Ordinary Piping, Sanitary Tubing, etc.
Certificate : ISO9001, PED, KS D 3577 & KS D 3595
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9. 1-5. Company Profile(2)
Sales Growth Unit: 0.1 Million USD
140 200
200 130 130
150
100
50
0
2008 2009 2010 2011
Production Capacity
Capacity
Product Range Line Q’ty
(Ton/Year)
Stainless Steel Tube for boiler & heat exchanger 3 2000
Stainless Steel Pipe for general piping 2 1200
Stainless Steel Seamless Tube 1x3 1400
Inspection Facilities : Universal Test Machine, Microscope, Hydrostatic Tester,
Eddy Current Tester & Vickers Hardness Tester
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10. 1-6. Main Customers
Domestic Customers Foreign Customers
▶ Doosan Heavy Industries & Construction ▶ Mitsubishi Heavy Industries Ltd.(Japan)
▶ Doosan Mecatec ▶ Mitsubishi Chemical Corp.(Japan)
▶ Sungjin Geotec ▶ Jord International Pte. Ltd.(Australia)
▶ TSM Tech Co., Ltd. ▶ BHEL(India)
▶ Hantec Engineering Co., Ltd. ▶ Aban Air Cooler Co.(Iran)
▶ Woo Yang H.C Co., Ltd. ▶ Aero Freeze System/GEA(Canada)
▶ Wonil T&I Co.,Ltd. ▶ Titan Metal Fabricators, Inc.(USA)
▶ Seoul Machinery Co.,Ltd. ▶ Intercol S.A./CBI/Reficar(Colombia)
▶ SEWON CELLONTECH Co., Ltd. ▶ Tasha Manufacturing Co.(Iran)
▶ SC Engineering ▶ Patkor Public Company Ltd.(Thailand)
▶ JMC.
▶ DKT Co., Ltd.
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23. 2-7. Testing Facilities (List)
Description Q’ty Availability Origin
Universal Test Machine 1 60 Ton KOREA
Microscope Tester 1 X50 ~ x500 KOREA
Eddy Current Tester 1 O.D.: 13.8mm ~ 60.5mm FRANCE
Hydrostatic Tester 1 Max. 200kg/㎠ KOREA
Vickers Hardness Tester 1 Max. 1HV KOREA
Mounting Press 1 - KOREA
Grinding Polisher 1 - KOREA
Belt Grinder 1 - KOREA
Precision cutting machine 1 - KOREA
Micro Meter 9 0 ~ 25mm JAPAN
Micro Meter 5 25 ~ 50mm JAPAN
Micro Meter 2 50 ~ 75mm JAPAN
Vernier Calipers 3 0 ~ 150mm JAPAN
Vernier Calipers 1 0 ~ 300mm JAPAN
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24. 2-7. Testing Facilities (Photo)
Universal Test Machine Micro Scope Tester
Eddy Current Tester Hydrostatic Tester
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29. 4-1. Quality Management System
Order Control Daily Plant
Customer Monthly Closing
Process Operation
Report
Status Report
Procurement Control Review Total
Process Production Control
Process (Tube Drawing) Status Report
Continuous Improvement Activity
Inspection Control Process
Supply Chain Management
Process Delivery Control Self-improvement
Data
Process Activity
Collection &
Analysis Select Theme
Payment Collecting Survey as-is, cause
Control Process Setting Target
Plan/Do Actions
Effect Analysis
Customer’s Claim Standardization
Running
Control Process /Management
Suggestion System
IN
PUT
OUT PUT Operation of Business Plan / Management Policy & Target Management
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30. 4-2. Quality Management Process
Order Control Process
Process Map
Step Supervised Under Co-operation with
Customer Manager Contents of Activities
Marketing Department Q.C, Production
Customer
1 Order Receive/Distribute ROQ Receiving and distribution of ROQ
2 Review Order Review ROQ
Prepare Draft Quotation
3 Prepare Draft Quotation (Including Delivery, Payment, Packing, and Heat
Treatment Method)
Prepare/ Prepare Quotation (Delivery, Payment Terms, Packing,
4 Distribute Quotation Heat Treatment Method, Effective Period)
5 Review Quotation
Review Quotation
6 Customer
Send Quotation
Send Quotation – Achieve Customer’s Approval
Approval
7 Receive/Distribute Order Production Control Receive Customer’s Order, Distribute to Managers
Analysis of
Based on Roll margin and Sales data, prepare Sales
8 Report
Sales Performance Performance Report to Managers
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31. 4-2. Quality Management Process
Production Control Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Production Dept. QC, Marketing, Admin.
1 Order Control Receive Customer Order Receive and register Customer Order from Marketing.
Record Customer, Volume, Delivery, Material,
2 Arrange Delivery
Specification, etc.
Check raw material and stock, and request purchase of
3 Check Inventory
shortage materials.
Procurement
Prepare/Adjust Control Prepare/adjust/distribute monthly production plan based
4 Monthly Production Plan on status of delivery and raw materials.
Prepare/adjust/distribute weekly tubing plan by each
Prepare/Adjust
5 Weekly Production Plan machine based on inventory and incoming schedule of
raw materials.
Check incoming schedule Check and adjust inventory and incoming schedule of
6 /inventory of materials
raw materials.
Issue Work Order
After checking details of customer order (MFG. Spec.,
7 (Tubing, Back-process) Steel Spec., QTY, Delivery, and Packing method), issue
work order.
Control production according to MFG. Spec., and keep
Tubing Process
8 Inspection recording of production performance and process
Equip. Control inspection report.
Control
Back-Process Make sure to manufacture according to manufacturing
9 specification of work order.
10 Labelling Check packing method and QTY, and attach tag.
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32. 4-2. Quality Management Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Production Dept. QC, Marketing, Admin.
Check production After checking steel model, order QTY, packing method,
11 Delivery Control
performance MFG Spec., etc, and prepare product inspection report.
Store finished products at stacking area, and make
12 Stack/Store Products delivery to customers by delivery schedule.
Collect recording data, and make analysis of yield ratio,
13 Analysis of production Report Operation ratio, Production Performance ratio, etc, and
performance report to managers.
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33. 4-2. Quality Management Process
Delivery Control Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Marketing Dept. Q.C, Production
Production/Inspection Check customer order after completion of production.
1 Check Customer Order Record
(Delivery and conforming of requirements)
Procurement
Control
Customer Notice to /Discuss with
2 Notice to /Discuss with customer about delivery plan.
customer
Receive Delivery Receive customer’s delivery request. (Reflection of
3
Request Verbal or contents of customer order)
4 Delivery Order Delivery Order
5 Loading Products Loading of Products
Prepare Invoice and record name of staff responsible for
6 Issue Invoice delivery to designated customer.
7 Check Delivery Check Delivery
8 Receive Invoice Collecting Control Receive customer-confirmed invoice.
Perform analysis of delivery based on delivery
9 Analysis of Delivery Report
conforming ratio data, and report to managers.
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34. 4-2. Quality Management Process
Customer Claim Control Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Marketing Dept. Q.C, Production
Wire /Mail
1 Customer Claim
Receive Customer Claim Receive customer claim thru wire. mail, and fax.
2 Report Customer Claim Report customer claim to production/QC department.
Customer
Check Inventory Check Claimed defect, and if claim is not defect, discuss
3 Master Book
with customer, and record to customer master book.
4 Survey claim contents Start survey of customer claim details.
Meeting for Meeting with production and QC to find corrective
5 counter-measure actions based on survey report.
6 Check received defect Check defect sample for customer claim
Survey root cause Start to find root cause of defect after checking defect
7
sample.
Our responsibility Discuss with If defect is found to be not from our responsibility out of
8 Customer
root cause survey report, discuss with customer.
Action first, and then If defect is from our responsibility, visit customer to
9 discuss with customer
discuss and explain our prior actions.
Perform discussed Perform quick corrective actions discussed with
10 actions
Corrective action
customer.
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35. 4-2. Quality Management Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Marketing Dept. Q.C, Production
11 Report to production Report discussions with customer to production
Analysis of Collect recorded Data, and perform analysis of customer
12 Report
customer claim defect ratio and quality cost, etc, and report to managers.
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36. 4-2. Quality Management Process
Procurement Control Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Production Dept. Q.C, Marketing
Calculate procurement Check inventory Prepare raw material procurement plan after checking
1 volume of raw material inventory of raw materials and finished goods according
to monthly production plan.
Supplier Prepare /Send ROQ Check steel model, thickness, width, and QTY, and
2
send ROQ to supplier.
Receive quotation Receive quotations from each suppliers, and check
3
delivery and price.
4 Supplier Review quotation Arrange and confirm delivery and cost for each suppliers.
After confirming final delivery and price for each
5 Prepare Purchase Order
suppliers, prepare Purchase Order.
6 Approval Get approval of Purchase Order from President.
Send /Confirm Send Purchase Order to selected supplier, and confirm
7
Purchase Order receipt.
Control raw material incoming schedule by Production
8 Incoming Progress
Control
Plan and Purchase Order.
Inspection Check if incoming material conforms Purchase Order for
Control
9 Incoming QTY, Steel Model, Thickness, Width, and Product
Production Inspection Report.
Control
Collect recorded data, and perform analysis of incoming
10 Analysis of Procurement Report
schedule conforming ratio, and report to managers.
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37. 4-2. Quality Management Process
Inspection Control Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Q.C Production Dept.
Supply Chain
1 Control Incoming Info. Check incoming date and QTY for raw materials.
Procurement
Control
Check Invoice and inspection report whenever raw
2 Check Purchase Order
material incoming arrives.
Before receipt of raw material, perform incoming
3 Incoming Inspection
inspection. (Weight, dimension)
Prepare /Notice to return If incoming inspection finds defects, send notice to
4
notice with return causes. supplier.
Report Check defects with supplier, and if no good to input,
5 Check products
Production make decision to return with agreement of supplier.
Control
Tubing /back-process Perform In-process inspection during Tubing /Back-
6 Inspection process. (Dimension, inner/outer surface)
Search defect trend for defects found during in-process
7 Search defect trend
inspection.
8 Pass/No-Good Make decision if defect can be repaired.
9 Store /Identify Store and identify defect goods.
10 Re-inspection Perform re-inspection
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38. 4-2. Quality Management Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Q. C. Production Dept.
Send repaired defect to final inspection, and send non-
11 Repair /Disposal Inspection
Control
repairable defect to disposal.
Perform final inspection before product dispatch.
12 Final Inspection (Dimension, mechanical properties)
13 Disposal Delivery Defects in final inspection shall be disposed.
Control
Collect recorded data, and perform analysis of in-
14 Analysis of Report process defect ratio, finished good defect ratio, and in-
Inspection result
house quality cost, etc, and report to managers.
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39. 4-2. Quality Management Process
Supply Chain Control Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Production dept. Q.C, Marketing
Control Supplier Order for back- Arrange incoming schedule with production completion
1 Process request schedule of out-sourcing supplier.
2 Logistics Plan
Check logistics plan of completed out-sourcing products.
3 Delivery Order Delivery Order to out-sourcing supplier.
4 Loading Loading of out-sourcing product.
5 Check Delivery Check dimension and QTY before delivery.
6 Issue Invoice Issue Invoice.
Receive
7 Invoice Supply to out-sourcing Supply out-sourcing product to supplier.
Control incoming Check incoming schedule of out-sourcing product thru
8
progress wire.
9 Incoming Incoming of out-sourcing product.
Incoming Inspection Upon incoming of out-sourcing product, perform
10
incoming inspection by QC inspector.
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40. 4-2. Quality Management Process
Process Map
Step Supervised Under Co-operation with
Customer Managers Contents of Activities
Production dept. Q.C, Marketing
Input inspected out-sourcing product to in-process of
11 Input to in-process
production.
Analysis of Report Perform analysis of incoming schedule conforming ratio,
12
out-sourcing pass-ratio, etc, and report to managers.
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41. 4-3. Quality Control Plan
Welded tube & pipe
Control Items and Quality Characteristics Controlling
Manufacturing Process
Control Items Check Point Methods Number of Test
1. Material Receiving
1) Mill Certificate Review 1) Measuring by micrometer
2. Incoming Inspection Each heat
2) Dimension &Surface 2) Visual Inspection
1) Welding Speed
3. Welding 1) Soundness of weld 2) Welding voltage and current Manufacturing standard At any time
3) Gas quantity
1) Condition of the outside and
4. Removal of weld 1) Visual inspection
Dimension and surface inside weld beads. At any time
beads 2) Measuring by micrometer
2) Outside diameter, thickness
Homogeneity of the weld and 1) Annealing temperature
5. Bright annealing Manufacturing standard At any time
heat affected zone 2) Hold time
Manufacturing standard and
6. Straightening Dimension Straightness Every working turn
Visual inspection
7. Cutting Dimension Length 1) Measuring by tape measure At any time
8. End facing Dimension Bevel angle Manufacturing standard Every working turn
1) Frequency 2) Sensitivity Manufacturing standard and
9. Eddy current test Soundness of the tube Each tube
3) Phase 4) Search coil specification
1) Outside diameter, thickness,
length 1) Measuring by micrometer and
1) Dimension
10. Final inspection 2) Tensile test tape measure Each lot
2) Mechanical properties
3) Hardness test 2) Measuring by related spec.
4) Other test
1) Packing state
11. Packing Manufacturing standard
2) Shipping mark
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42. 4-3. Quality Control Plan
Seamless tube & pipe
Control Items and Quality Characteristics Controlling
Manufacturing Process
Control Items Check Point Methods Number of Test
1. Material Receiving
1) Mill Certificate Review 1) Measuring by micrometer
2. Incoming Inspection Each heat
2) Dimension &Surface 2) Visual Inspection
1) Reduction ratio 1) Drawing Speed 1) Manufacturing standard
3. Drawing 2) Dies & Plug 2) Outside, thickness 2) Measuring by micrometer At any time
3) Dimension 3) Surface 3) Visual Inspection
Homogeneity of the heat 1) Annealing temperature
4. Annealing Manufacturing standard At any time
affected zone 2) Hold time
Manufacturing standard and
5. Straightening Dimension Straightness Every working turn
Visual inspection
6. Cutting Dimension Length 1) Measuring by tape measure At any time
7. End facing Dimension Bevel angle Manufacturing standard Every working turn
8. Pickling Surface Visual Inspection At any time
1) Frequency 2) Sensitivity Manufacturing standard and
9. Eddy current test Soundness of the tube Each tube
3) Phase 4) Search coil specification
1) Outside diameter, thickness,
length 1) Measuring by micrometer and
1) Dimension
10. Final inspection 2) Tensile test tape measure Each lot
2) Mechanical properties
3) Hardness test 2) Measuring by related spec.
4) Other test
1) Packing state
11. Packing Manufacturing standard
2) Shipping mark
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