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LPG – Liquefied Petroleum Gas
& Gas Detection System
– LPG & Gas Detection System,
Installation, Testing & Commissioning,
...
Introduction
LPG System used to supply :
LPG: Liquefied Petroleum Gas
I. Building – residential – kitchens.
II. Restaurant...
Introduction
LPG, Gas detection Systems:
I. LPG – Mechanical: Piping, Solenoid, Outlets.
II. Gas Detection System, Sensors...
Schematic Module
PIPES ASSETS
 LPG & Gas Detection System as below procedure:
TESTING &
COMMISSIONING
MAINTENANCE
& OPERA...
Introduction
 What is LPG:
A - Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simpl...
Introduction
What is LPG:
D - As its boiling point is below room temperature, LPG will evaporate quickly at normal
tempera...
Introduction
 Odor Of LPG:
 In their natural state, LPG (Propane and Butane) and Natural Gas
(Methane) are all odorless ...
Introduction
LPG – schematic – residential example:
Gas Detector Of LPG at low level ( LPG heavier than
air).
Gas Detector...
Introduction
LPG – schematic – residential example:
Training Module
 In case of gas leakage inside the area (Kitchen, Lab), the gas sensor will
be activated.
 When sensor a...
Schematic Module
LPG Station
Main LPG panel, including solenoid and
regulator( up to 20 PSI) Solenoid Valve
SUB LPG Panel
...
Schematic Module-Detection
detectors
Detection Control Panel SUB LPG Panel
Solenoid Valve
Siren light
Main LPG Panel
Fire ...
Pipes
 Pipes for LPG: black steel seamless SCH80, galvanized steel,
polyethylene (under ground) Or Copper Pipes Type K & ...
Solenoid Valve
 It is electrical control valve energized from
control panel to shut off the gas in case there is
leakage....
Detector
 Detectors for LPG SENSITROM brand or other.
 Detectors installed at low level at 30 cm from finish floor level...
SIREN LIGHT
 SIREN light for LPG SENSITROM
brand or other.
 Once LPG system is activated, panel will
give signal to sire...
Detection Control Panel
 Detection control panel for LPG SENSITROM brand or other.
 When sensor level reach more than 10...
LPG Gas Panel
Ball Valve
Strainer
Solenoid Valve
Gas detector
Gas regulator
Pressure Gauge
Ball Valve
Gas Relief
Testing & Commissioning
 The LPG system tested and certified by Third Party-
specialist in installation and commissioning...
Testing & Commissioning
 Test Procedures:
The testing commissioning of LPG system follow the below
procedure:
1) Leak tes...
Testing & Commissioning
 Why we make the above test ??
Targets and goals of LPG tests:
1. To maintain the equipments life...
Precautions & Recommendations
1. Once LPG detector detect a gas leakage,
system will be alert, all persons should leave
th...
Design & Calculation
Gas Demand ( Btu/h) – ASHREA:
Design & Calculation
Heating Value After Vaporization:
Design & Calculation
Storage Calculation:
a.) Estimate No. of Lpg outlets
1. FOUR GAS BURNER RANGE ON GAS OVEN = 1 OUTLET
...
Design & Calculation
Pipe Size – Steel Pipe Sch40:
LPG pipes size depend to the
following:
- Pressure inside the pipe.
- P...
Design & Calculation
Pipe Size – Copper Pipe Type K:
Design & Calculation
Pipe Size – Copper Pipe Type L:
Design & Calculation
LPG Pressure Drop:
System On Photos
System On Photos
End
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LPG – Liquefied Petroleum Gas & Gas Detection System

Installation, Schematic, Testing Commissioning and Design.

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LPG – Liquefied Petroleum Gas & Gas Detection System

  1. 1. LPG – Liquefied Petroleum Gas & Gas Detection System – LPG & Gas Detection System, Installation, Testing & Commissioning, design, Calculation. Prepared By: Monzer Salahdine
  2. 2. Introduction LPG System used to supply : LPG: Liquefied Petroleum Gas I. Building – residential – kitchens. II. Restaurants, industrial kitchens. III. Laboratories, medical collages. IV. Boilers. V. Cars.
  3. 3. Introduction LPG, Gas detection Systems: I. LPG – Mechanical: Piping, Solenoid, Outlets. II. Gas Detection System, Sensors, Panels. LPG, Code and Standards: 1. NFPA 58: Liquefied Petroleum Gas Code.
  4. 4. Schematic Module PIPES ASSETS  LPG & Gas Detection System as below procedure: TESTING & COMMISSIONING MAINTENANCE & OPERATION MaintenanceInstallation & Commissioning
  5. 5. Introduction  What is LPG: A - Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances, cooking equipment, and vehicles. B - Varieties of LPG bought and sold include mixes that are primarily propane (C3H8), primarily butane (C4H10) and, most commonly, mixes including both propane and butane. C - LPG has a typical specific calorific value of 46.1 MJ/kg compared with 42.5 MJ/kg for fuel oil and 43.5 MJ/kg for premium grade petrol (gasoline). However, its energy density per volume unit of 26 MJ/L is lower than either that of petrol or fuel oil, as its relative density is lower (about 0.5–0.58, compared to 0.71–0.77 for gasoline).
  6. 6. Introduction What is LPG: D - As its boiling point is below room temperature, LPG will evaporate quickly at normal temperatures and pressures and is usually supplied in pressurized steel vessels. They are typically filled to 80–85% of their capacity to allow for thermal expansion of the contained liquid. The ratio between the volumes of the vaporized gas and the liquefied gas varies depending on composition, pressure, and temperature, but is typically around 250:1. The pressure at which LPG becomes liquid, called its vapor pressure, likewise varies depending on composition and temperature; for example, it is approximately 220 kilopascals (32 psi) for pure butane at 20 °C (68 °F), and approximately 2,200 kilopascals (320 psi) for pure propane at 55 °C (131 °F). LPG is heavier than air, unlike natural gas, and thus will flow along floors and tend to settle in low spots, such as basements. There are two main dangers from this. The first is a possible explosion if the mixture of LPG and air is within the explosive limits and there is an ignition source. The second is suffocation due to LPG displacing air, causing a decrease in oxygen concentration. E - Commercially available LPG is currently derived from fossil fuels. Burning LPG releases carbon dioxide, a greenhouse gas. The reaction also produces some carbon monoxide. LPG does, however, release less CO, 2 per unit of energy than does coal or oil. It emits 81% of the CO 2 per kWh produced by oil, 70% of that of coal, and less than 50% of that emitted by coal-generated electricity distributed via the grid. Being a mix of propane and butane, LPG emits less carbon per joule than butane but more carbon per joule than propane.
  7. 7. Introduction  Odor Of LPG:  In their natural state, LPG (Propane and Butane) and Natural Gas (Methane) are all odorless gases. The distinctive smell that people associate with these gases is actually added to them as a safety measure.  For many decades, the gaseous fuels industry has added odorants to LPG and Natural Gas so that people can detect gas leaks with nothing more than their noses. Without the addition of an odorant, leaking gas could collect without being detected. This would create a dangerous condition that could lead to an explosion or fire.
  8. 8. Introduction LPG – schematic – residential example: Gas Detector Of LPG at low level ( LPG heavier than air). Gas Detector Of Natural Gas and Coal gas at High level (Air heavier than Natural Gas & Coal Gas).
  9. 9. Introduction LPG – schematic – residential example:
  10. 10. Training Module  In case of gas leakage inside the area (Kitchen, Lab), the gas sensor will be activated.  When sensor activated, it will send a signal to the control panel which will treat it as leakage inside the lab.  The panel will give signal to the solenoid valve to close immediately (safety issue) to make sure no more gas flow to the area.  The panel will give another signal to the siren light (alarm, mean there is leakage).  The panel will give signal to fire alarm system which will deactivate the main solenoid valve of LPG of entire building(safety issue).  The panel will give signal to BMS system to notify to the operator (maintenance team) that there is a gas leakage.  The operator (maintenance team) has to check if there is leakage or any of outlet open and to close it immediately.  When make sure that no more gas leakage inside the lab, the operator to make reset for the panel which will activate the system and the gas flow inside the lab, and to reset the solenoid manually.  In case of fire alarm in the building, the main solenoid will be shut off (safety issue), once signal not disappear the system will be automatic ally.
  11. 11. Schematic Module LPG Station Main LPG panel, including solenoid and regulator( up to 20 PSI) Solenoid Valve SUB LPG Panel Outlets Including Solenoid & Regulator( up to 5 PSI) Liquid Gas 6.9 Bars 5 PSI Outlets 1.5 to 2.5 PSI 10-20 PSI
  12. 12. Schematic Module-Detection detectors Detection Control Panel SUB LPG Panel Solenoid Valve Siren light Main LPG Panel Fire Alarm Panel BMS System –Monitoring Only in case of leakage
  13. 13. Pipes  Pipes for LPG: black steel seamless SCH80, galvanized steel, polyethylene (under ground) Or Copper Pipes Type K & L:  Black steel Pipes – seamless SCH 80, threaded installed in double containment pipes for protection or welding without double containment.  Copper Pipes Brazing and threaded for the fittings ( valves, Outlets).
  14. 14. Solenoid Valve  It is electrical control valve energized from control panel to shut off the gas in case there is leakage.  Solenoid valve is normally close, once the panel energized the panel send signal to solenoid to open.  In case there is leakage, the panel cut the power to solenoid and became again closed ( solenoid Spring Type).
  15. 15. Detector  Detectors for LPG SENSITROM brand or other.  Detectors installed at low level at 30 cm from finish floor level and above ceiling in double containment or near the welding joint,  Detector detect the LPG leakage and give signal to detection control panel.  This sensor module utilizes an MQ-6 as the sensitive component and has a protection resistor and an adjustable resistor on board. The MQ-6 gas sensor is highly sensitive to LPG, iso-butane, propane and less sensitive to alcohol, cooking fume and cigarette smoke. It could be used in gas leakage detecting equipment in family and industry. The resistance of the sensitive component changes as the concentration of the target gas changes.  Each detector will have an IP and address where all detectors will be labeled and reflected the same label in LPG detection panel- in case of leakage will knowing which detector giving the signal and the location of each.
  16. 16. SIREN LIGHT  SIREN light for LPG SENSITROM brand or other.  Once LPG system is activated, panel will give signal to siren light to alert the area about the LPG leakage( Visio and Audio).  Wall mounted or ceiling mounted.
  17. 17. Detection Control Panel  Detection control panel for LPG SENSITROM brand or other.  When sensor level reach more than 10, alarm 1 will be activated( solenoid level close but no alarm).  When sensor level reach more than 15, alarm 2 will be activated( solenoid close, alarm occur).  Once sensor level reach more than 20 , alarm 3 will be activated ( solenoid close, alarm occur, given alarm to fire alarm and BMS).
  18. 18. LPG Gas Panel Ball Valve Strainer Solenoid Valve Gas detector Gas regulator Pressure Gauge Ball Valve Gas Relief
  19. 19. Testing & Commissioning  The LPG system tested and certified by Third Party- specialist in installation and commissioning of LPG system and certified from NFPA58.  Below tools used for the tests:
  20. 20. Testing & Commissioning  Test Procedures: The testing commissioning of LPG system follow the below procedure: 1) Leak test( all pipes are tested by nitrogen for leak test). 2) Flushing( all pipes flushed by compressed air and nitrogen to clean them from particles and humidity. 3) Cross test(valve test- when valve close, gases not allow to reach to others connections. 4) Flow test. 5) Final leak test once open the LPG, testing by manual LPG detector sensor.
  21. 21. Testing & Commissioning  Why we make the above test ?? Targets and goals of LPG tests: 1. To maintain the equipments life and saving money. 2. To reduce the risk (avoid LPG leakages in future). 3. Maintenance team to inspect and check in daily basis to maintain the above two items (check list).
  22. 22. Precautions & Recommendations 1. Once LPG detector detect a gas leakage, system will be alert, all persons should leave the room immediately. 2. Specialist of LPG system (maintenance company) should investigate the cause of leakage and rectify if any than to reset and re open the LPG system. 3. Maintenance company to make a check list for each panel in daily basis. 4. Damages pieces or sensors to be rectified immediately to maintain secured areas.
  23. 23. Design & Calculation Gas Demand ( Btu/h) – ASHREA:
  24. 24. Design & Calculation Heating Value After Vaporization:
  25. 25. Design & Calculation Storage Calculation: a.) Estimate No. of Lpg outlets 1. FOUR GAS BURNER RANGE ON GAS OVEN = 1 OUTLET 2. GAS POT STOVE ON STAND = 1 OUTLETS 3. SMOOTH PLATE GAS GRIDDLE = 0 OUTLET 4.GAS BIOLING PAN = 0 OUTLET 5. BOWEL GAS FRYER = 0 OUTLET b.) Design Datas: 1. 4 BURNER OVEN = 65,000 Btu/Hr 2. GAS POT STOVE ON STAND = 40,000 Btu/Hr 3. SMOOTH PLATE GAS GRIDDLE = 30,000 Btu/Hr 4.GAS BIOLING PAN = 30,000 Btu/Hr 5. BOWEL GAS FRYER = 30,000 Btu/Hr TOTAL = 105,000 Btu/Hr c.) Calculation of Lpg consumption/day: 3. LPG HEATING VALUE AFTER VAPORIZATION = 2,500 Btu/h/Ft³ FROM ASPE 4. SIMULTANEOUS USE FACTOR ( PEAK HOUR AT LUNCH ONLY ) = 60% 5. ASSUMED BURNER WORKING TIME = 6 Hrs./Day ( 2 hrs per meal serve) TOTAL LPG CONSUMPTION PER DAY = 151 Ft³ CONVERTING CU FT OF VAPOR TO GALLONS (75 ft3 / 36.39) = 4 G/Day USE STORAGE TANK FOR ONE WEEK = 110 L
  26. 26. Design & Calculation Pipe Size – Steel Pipe Sch40: LPG pipes size depend to the following: - Pressure inside the pipe. - Pipe lengths. Btu/h or KW will be reduced with pipe length ( otherwise pipe size to be increased – see below).
  27. 27. Design & Calculation Pipe Size – Copper Pipe Type K:
  28. 28. Design & Calculation Pipe Size – Copper Pipe Type L:
  29. 29. Design & Calculation LPG Pressure Drop:
  30. 30. System On Photos
  31. 31. System On Photos
  32. 32. End

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