LPG Gas Cylinder
Product Selection & Technical Specifications
Selecting the correct LPG cylinder requires matching water capacity, operating pressure, and regional valve configurations to your distribution network. Review the standard configuration matrix below.
|
Model |
Water Capacity (L) |
Filling Weight (kg) |
Outer Diameter (mm) |
Wall Thickness (mm) |
Test Pressure (MPa) |
Standard Compliance |
|
YC-05 |
12.0 |
5.0 |
300 |
2.3 |
3.2 |
ISO 4706 / EN 1442 |
|
YC-10 |
24.5 |
10.0 |
318 |
2.5 |
3.2 |
ISO 4706 / EN 1442 |
|
YC-15 |
35.5 |
15.0 |
360 |
2.7 |
3.2 |
ISO 4706 / EN 1442 |
|
YC-45 |
108.0 |
45.0 |
408 |
3.8 |
3.2 |
ISO 4706 / EN 1442 / DOT |
Material Specifications & Metallurgical Properties
Cylinder integrity starts with raw material selection. We use killed carbon steel coils sourced directly from accredited mills with strict chemical composition controls.
Steel Grade
HP295 / SG295 / ASTM A607 Grade 50.
Chemical Composition Limits
Carbon (C): <= 0.20%
Manganese (Mn): 0.30% - 0.60%
Phosphorus (P): <= 0.030%
Sulfur (S): <= 0.030%
Mechanical Properties
Yield strength >= 295 MPa, Tensile strength 410 - 550 MPa, Elongation >= 21%.
Traceability
Heat numbers and steel mill certificates are stamped on the cylinder foot ring and cross-referenced in batch documentation.
Manufacturing Process & Quality Control
Our production facility utilizes automated stamping, robotic welding, and continuous heat treatment lines to eliminate human error and ensure structural uniformity.
Step-by-Step Production Workflow
Blanking & Deep Drawing
Hydraulic presses shear steel coils into circular blanks, drawing them into upper and lower half-shells.
Edge Trimming & Joggling
Shell edges are machined to exact tolerances to prepare for circumferential welding.
Bung & Collar Welding
Threaded valve bosses (bungs) and foot rings are welded using automated MIG/TIG processes.
Circumferential Seam Welding
Upper and lower shells are joined via automatic submerged arc welding (SAW) to ensure full penetration and zero internal voids.
Normalization Heat Treatment
Welded cylinders undergo full-body stress-relieving heat treatment at 650°C +/- 20°C to eliminate residual welding stresses and refine the grain structure.
Surface Preparation & Coating
Cylinders are shot-blasted to Sa 2.5 surface cleanliness, electrostatically sprayed with thermal zinc (for enhanced corrosion resistance), and finished with an exterior UV-resistant powder coat (DFT >= 60 um).
Mandatory Testing Protocol
Every batch undergoes strict destructive and non-destructive testing (NDT) according to ISO 4706 / EN 1442:
-
Hydrostatic Pressure Test
100% tested at test pressure (Ph = 3.2 MPa or higher) for a minimum of 30 seconds to verify structural elasticity and zero leakage.
-
Burst Test
Conducted at a ratio of 1 test per 1,000 cylinders to verify ultimate burst pressure exceeds 2.2 x working pressure.
-
Radiographic / Ultrasonic Testing
Weld seams undergo random X-ray inspection to detect internal defects.
-
Burst Ring & Tensile Testing
Coupon testing of welded joints to verify tensile strength meets design thresholds.
Application Suitability & Operating Environment
Proper matching of cylinders to end-use applications prevents operational hazards and premature wear.
Commercial Kitchens & Restaurants
10kg to 15kg cylinders with quick-connect or screw valves, optimized for high vapor draw rates.
Forklift & Industrial Fleet (Motor Fuel)
Horizontal or vertical liquid/vapor withdrawal cylinders equipped with Overfill Prevention Devices (OPD) and pressure relief valves (PRV).
Bulk Distribution Depots
45kg industrial cylinders designed for repeated transit, handling abuse, and industrial manifold connection.
Supplier Evaluation Guide for B2B Buyers
When auditing an LPG cylinder manufacturer, verify the following objective criteria:
Statutory Approvals
Check for valid ISO 9001, ISO 14001, and ISO 45001 management systems, alongside notified body certificates (e.g., TÜV, SGS, BV, or LR) for PED/TPED or DOT compliance.
Welding Operator Certification
Ensure all welding operators are certified according to ASME Section IX or ISO 9606.
Traceability Records
Confirm the factory can provide individual hydrostatic test logs and material test certificates (MTC) linked to the serial number stamped on the cylinder collar.
Packaging & Logistics Capability
Cylinders must be shipped securely in 20ft/40ft containers with protective net sleeves or wooden pallet frames to prevent coating damage during maritime transit.
Frequently Asked Questions
Request a Technical Quotation & Spec Sheet
To receive a detailed quotation, freight cost estimate, and technical drawing (CAD/PDF) for your target market, please provide the following parameters to our engineering team:
Required Water Capacity / Filling Weight
Destination Country & Applicable Standard (EN, DOT, ISO)
Valve Type & Collar Design Requirements
Estimated Annual Volume & Container Quantity
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