1. Material & Standards

• Type: High-Pressure Seamless Steel Tube

• Standards: ISO 9809, EN 10297-1, GB/T 5099

• Material Grades: 20MnMoNi55, 34CrMo4, or equivalent high-strength steel

• Surface Condition: Anti-rust oil coating or pickled finish

2. Key Features

✔ High Pressure Resistance – Designed to withstand high internal pressures in gas cylinders
✔ Excellent Mechanical Strength – Ensures safety and durability for LPG/CNG applications
✔ Seamless Construction – Prevents leaks and improves structural integrity
✔ Customizable Dimensions – Various diameters and wall thicknesses for different cylinder types

3. Applications

• LPG Gas Cylinders

• CNG Gas Cylinders

• Compressed Gas Storage Tanks

• Industrial Gas Cylinders

4. Certifications

• ISO 9809 / EN 10297 Compliance

• Mill Test Certificate (MTC)

• Third-Party Inspection (SGS, BV, TUV)

Frequently Asked Questions (FAQ)

1. Are you a manufacturer or trading company?
We are a manufacturer with our own factory located in Hebei, China.

2. What materials do you offer?

• Stainless Steel: 304, 304L, 316, 316L, 321, etc.

• Carbon Steel: ASTM A105, ASTM A350 LF2, Q235, Q345, etc.

• Alloy Steel: ASTM A182 F11, F22, F5, etc.

3. Which standards do your products comply with?
ASME B16.5, ANSI, ASTM, DIN, JIS, EN, GB — with third-party inspection available.

4. Do you support OEM/ODM customization?
Yes, we provide custom machining, coating, marking, and packaging based on your drawings.

5. What is your minimum order quantity (MOQ)?
MOQ is typically 1 piece for standard items; customized parts may vary.

6. Do you provide free samples?
Yes, free samples for standard sizes are available; buyers cover shipping cost.

7. What is your delivery time?

• In-stock: 3–5 working days

• Bulk/custom orders: 10–25 working days

8. How do you ensure product quality?
We perform full inspection: raw material verification, dimensional checks, pressure/leak tests, and surface finish inspection. Third-party testing is available upon request.