Industry Overview
LPG cylinders are essential pressure vessels used for storing and supplying liquefied petroleum gas for cooking and other applications. The cylinder body is manufactured by deep drawing two pieces, which are subsequently welded together to form a compact, leak-free unit. LPG cylinders are available in capacities such as 5 Kg., 12 Kg., 14.2 Kg. & 19 Kg. and are manufactured subject to applicable safety and quality requirements, including BIS standardization and Explosive License requirements.
LP Gas cylinders are produced in different sizes according to their intended application. For domestic use, capacities typically range from 4kg to 15kg, while commercial and industrial applications commonly use cylinders ranging from 45kg to 50kg. Smaller 1kg to 3kg cylinders are used for camping and as entry-level LP Gas applications in developing countries. Forklift cylinders are generally designed for horizontal use and have capacities ranging from 15kg to 22kg.
Cylinder diameter and gross weight are important considerations in selecting a suitable size because they affect handling, filling-plant conveyors, pallets, racks and storage arrangements. LPG cylinders are generally used in the vertical position. Cylinders also carry identification and manufacturing information, including serial number, tare/gross weight, water capacity, test date, manufacturer identification and year of manufacturing.
Cost Estimation
| Particulars | Value |
|---|---|
| Plant Capacity | 3200 Nos/Day |
| Land & Building (5000 sq.mt.) | Rs. 4.39 Cr |
| Plant & Machinery | Rs. 17.35 Cr |
| Working Capital for 2 Months | Rs. 26.54 Cr |
| Total Capital Investment | Rs. 49.02 Cr |
| Rate of Return | 40% |
| Break Even Point | 40% |
Content Index
- INTRODUCTION
- FOR LPG CYLINDER
- SIZES OF LPG CYLINDER
- CONSTRUCTION OF LPG CYLINDER
- 1. BODY
- 2. BUNG
- 3. SHROUD
- 4. FOOT RING
- 5. VALVES
- (A) SELF-CLOSING, CLIP-ON VALVE
- (B) HAND WHEEL OPERATED VALVE
- FOR OXYGEN CYLINDER
- SPECIFICATION OF OXYGEN CYLINDER
- (1) TYPE A OXYGEN CYLINDER
- (2) TYPE B OXY GEN CYLINDER
- (3) TYPE D OXYGEN CYLINDER
- USES AND APPLICATION
- FOR LPG CYLINDER
- FOR OXYGEN CYLINDER
- B.I.S. SPECIFICATION
- FOR LPG CYLINDER
- FOR OXYGEN CYLINDER
- PROCESS FLOW CHART
- FOR LPG CYLINDER
- FOR OXYGEN CYLINDER
- MANUFACTURING PROCESS
- FOR LPG CYLINDER
- (A) FOR PRESSURE PARTS
- (B) NON-PRESSURE PARTS
- GENERAL
- THE MAIN STEPS ARE GIVEN BELOW
- QUALITY CONTROL
- (A) MATERIAL SPECIFICATIONS:
- (B) WELDING SPECIFICATION
- (C) MANUFACTURING PROCESS SPECIFICATION
- (A) CYLINDER BODY
- (B) VALVE PROTECTION RING-STAY PLATE ASSEMBLY
- (C) FOOTRING
- (D) HEAT TREATMENT
- (E) SURFACE PREPARATION & PAINTING
- (F) TESTING
- (G) SCREEN PRINTING/STENCILING
- (H) STAMPINGS & PUNCHING
- 1. STAMPING ON BUNG:
- 2. STAMPING ON THE STAY PLATES:
- (I) VALVE FIXING
- (J) WEIGHMENT OF CYLINDER
- (K) PACKING
- FOR OXYGEN CYLINDER
- QUALITY CONTROL AND TESTING (PLEASE REFER IS: 7285(PART-I): 2004
- 1. MATERIALS
- 2. HEAT TREATMENT
- 3. DESIGN
- A. NECK DESIGN
- B. VALVE FITTINGS
- C. FOOT RINGS
- D. NECK RINGS
- 4. MANUFACTURE
- A. WALL THICKNESS
- B. SURFACE DEFECTS
- C. OUT-OF-ROUNDNESS
- D. MEAN DIAMETER
- E. STRAIGHTNESS
- F. VERTICALLY
- G. STABILITY
- 5. TESTING REQUIREMENTS
- A. TYPE APPROVAL PROCEDURE
- B. BATCH TESTS
- C. TEST ON EVERY CYLINDER
- POSSIBLE TESTS IN A DAY
- 6. CYLINDER MARKING
- 7. BIS CERTIFICATION MARKING
- 8. COLOUR IDENTIFICATION
- 9. PREPARATION FOR DESPATCH
- MARKET POSITION
- PRINCIPLES OF PLANT LAYOUT
- MAJOR PROVISIONS IN ROAD PLANNING FOR MULTIPURPOSE SERVICE ARE:
- PLANT LOCATION FACTORS
- PRIMARY FACTORS
- 1. RAW-MATERIAL SUPPLY:
- 2. MARKETS:
- 3. POWER AND FUEL SUPPLY:
- 4. WATER SUPPLY:
- 5. CLIMATE:
- 6. TRANSPORTATION:
- 7. WASTE DISPOSAL:
- 8. LABOR:
- 9. REGULATORY LAWS:
- 10. TAXES:
- 11. SITE CHARACTERISTICS:
- 12. COMMUNITY FACTORS:
- 13. VULNERABILITY TO WARTIME ATTACK:
- 14. FLOOD AND FIRE CONTROL:
- EXPLANATION OF TERMS USED IN THE PROJECT REPORT
- 1. DEPRECIATION:
- 2. FIXED ASSETS:
- 3. WORKING CAPITAL:
- 4. BREAK-EVEN POINT:
- 5. OTHER FIXED EXPENSES:
- 6. MARGIN MONEY:
- 7. TOTAL LOAD:
- 8. LAND AREA/MAN POWER RATIO:
- PROJECT IMPLEMENTATION SCHEDULES
- INTRODUCTION
- PROJECT HANDLING
- PROJECT SCHEDULING
- PROJECT CONSTRUCTION SCHEDULE
- TIME SCHEDULE
- PLANT LAYOUT
- SUPPLIERS OF LPG & OXYGEN CYLINDER
- SUPPLIERS OF RAW MATERIALS
- SUPPLIERS OF M.S SHEET
- SUPPLIERS OF M.S BILLET
- SUPPLIERS OF LPG & OXYGEN CYLINDER VALVE
- SUPPLIERS OF BUNG
- SUPPLIERS OF SHROUD AND FOOT RING
- SUPPLIERS OF MIG WELDING ELECTRODE
- SUPPLIERS OF ZINC
- SUPPLIERS OF POWDER COATING PAINT
- SUPPLIERS OF PLANT AND MACHINERY
- SUPPLIERS OF SHEARING MACHINE
- SUPPLIERS OF BRASS BILLET CUTTING MACHINE
- SUPPLIERS OF DEEP DRAWING PRESS
- SUPPLIERS OF INDUCTION HEATING FURNACE
- SUPPLIERS OF CNC LATHE MACHINE
- SPINNING LATHES
- CIRCLE CUTTING MACHINE
- SUPPLIERS OF POWER PRESS
- SUPPLIERS OF TRIMMING MACHINE
- SUPPLIERS OF MIG WELDING MACHINE
- SUPPLIERS OF HEAT TREATMENT FURNACE
- SUPPLIERS OF SAND BLASTING MACHINE
- SUPPLIERS OF DG SETS
- SUPPLIERS OF EOT CRANES
- SUPPLIERS OF POWER TRANSFORMERS
- SUPPLIERS OF ELECTRICAL PANEL
- SUPPLIERS OF ELECTRIC MOTOR
- SUPPLIERS OF COOLING TOWER
- SUPPLIERS OF EFFLUENT TREATMENT PLANT (ETP PLANT)
- SUPPLIERS OF AIR POLLUTION CONTROL EQUIPMENTS
- SUPPLIERS OF AIR CONDITIONING EQUIPMENTS
- SUPPLIERS OF AIR COMPRESSORS
- SUPPLIERS OF PLATFORM WEIGHING MACHINE
- SUPPLIERS OF MATERIAL HANDLING EQUIPMENTS
- SUPPLIERS OF FIRE FIGHTING EQUIPMENTS
- SUPPLIERS OF SHOT BLASTING MACHINE
- SUPPLIERS OF JIGS AND FIXTURE
- SUPPLIERS OF SUBMERSIBLE WATER PUMP
Appendix
- APPENDIX – A:
- 01. PLANT ECONOMICS
- 02. LAND & BUILDING
- 03. PLANT AND MACHINERY
- 04. OTHER FIXED ASSESTS
- 05. FIXED CAPITAL
- 06. RAW MATERIAL
- 07. SALARY AND WAGES
- 08. UTILITIES AND OVERHEADS
- 09. TOTAL WORKING CAPITAL
- 10. TOTAL CAPITAL INVESTMENT
- 11. COST OF PRODUCTION
- 12. TURN OVER/ANNUM
- 13. BREAK EVEN POINT
- 14. RESOURCES FOR FINANCE
- 15. INSTALMENT PAYABLE IN 5 YEARS
- 16. DEPRECIATION CHART FOR 5 YEARS
- 17. PROFIT ANALYSIS FOR 5 YEARS
- 18. PROJECTED BALANCE SHEET FOR (5 YEARS)
Frequently Asked Questions
An LPG cylinder is a pressure vessel designed to store and supply liquefied petroleum gas safely for applications such as cooking. The cylinder body is produced by deep drawing metal components and welding them together to create a compact, leak-resistant unit. LPG cylinders are manufactured in different capacities according to their intended use. Their design, materials, manufacturing processes, testing, marking and safety features must comply with applicable standards and regulatory requirements.
LPG cylinders are available in different sizes depending on their application and handling requirements. The report identifies 5 Kg., 12 Kg., 14.2 Kg. & 19 Kg. capacities for LPG cylinders and explains that domestic cylinders typically range from 4kg to 15kg. Commercial and industrial cylinders commonly range from 45kg to 50kg, while smaller 1kg to 3kg cylinders may be used for camping and entry-level applications. Forklift cylinders are generally designed for horizontal use.
LPG cylinders are manufactured through a sequence of forming, fabrication, heat treatment, finishing, testing and assembly operations. The report describes deep drawing for pressure parts, fabrication of non-pressure parts, welding, heat treatment, surface preparation and painting, testing, marking, valve fixing, weighment and packing. Manufacturing controls cover material specifications, welding specifications and process specifications. Each stage is important for achieving the required mechanical integrity, dimensional accuracy, leak resistance and safe service performance.
LPG cylinder quality control covers materials, welding, manufacturing processes, heat treatment, surface preparation, testing, marking and final inspection. Dimensional and physical characteristics such as wall thickness, surface defects, out-of-roundness, mean diameter, straightness, verticality and stability are important inspection areas. Testing and certification requirements depend on the applicable standards and regulatory framework. Proper inspection throughout production helps ensure that pressure vessels meet required safety and performance criteria before dispatch.
LPG cylinders are marked and colour identified to support identification, traceability, handling and safety. The report states that cylinders carry information such as serial number, tare/gross weight, water capacity, test date, manufacturer identification and year of manufacturing. It also describes colour identification and markings associated with different cylinder categories. BIS certification marking, cylinder marking and preparation for dispatch are included as specific quality-control and testing topics in the report.
An LPG cylinder manufacturing plant should consider raw-material supply, markets, power and fuel, water, climate, transportation, waste disposal, labour, regulatory laws, taxes and site characteristics. The report also identifies community factors, vulnerability to wartime attack, and flood and fire control among plant-location considerations. Plant layout and road planning should support efficient movement of materials, equipment and finished cylinders while maintaining suitable provisions for safety, utilities, storage, production and dispatch operations.
LPG cylinder manufacturing is subject to applicable safety, quality and regulatory requirements, including BIS standardization and relevant licensing requirements. The report specifically includes B.I.S. Specification, BIS certification marking, cylinder marking, colour identification and testing requirements as important areas. It also discusses quality control covering materials, heat treatment, design, manufacture and testing. Manufacturers should verify the current requirements of the applicable standards and authorities before designing or operating a production facility.
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