Stainless steel pipe rolled to your specification
316L seamless pipe from OD 6 to 630 mm, 2507 deep-sea duplex and 2520 heat-resistant tube. 34 cold-rolling mills in Pingyang, ISO 9001 certified, pressure-piping licensed, EN 10204 3.1 material certificates with every lot.
- Annual sales (RMB)
- 2 bn
- Plant area (mu)
- 160
- Employees
- 400+
- Cold-rolling mills
- 34
Product Range
Certifications & Compliance
ISO 9001:2015 — Quality Management
ISO 14001:2015 — Environmental Management
ISO 45001:2018 — Occupational Health & Safety
PED 2014/68/EU — EEM Certificate (Annex I)
Special Equipment Manufacturing Licence — Pressure Piping
Zhejiang Made Certification — Pressure Piping
Inside the Factory
Frequently Asked Questions
What is your MOQ for stainless steel seamless pipe?
Minimum order quantity is set per size and grade so that the heat stays economical. Tell us your target quantity and specification, and we confirm the exact minimum for your size within one working day. Trial orders are negotiable for first cooperation.
Do you supply EN 10204 3.1 material certificates?
Yes. Every lot ships with an EN 10204 3.1 inspection certificate stating heat number, grade, chemical composition, mechanical properties and test results. 3.2 certificates witnessed by a third-party inspector are available on request.
Which standards can you produce stainless steel pipe to?
ASTM A312 / A213 / A269 / A270, GB/T 14976, GB/T 13296 and the GB/T 17395-2024 dimensional tolerances. Our engineers took part in drafting GB/T 17395-2024, so customer standards and agreed inspection plans are also workable.
What is the lead time for 316L seamless pipe?
Standard sizes from stock ship in 3–7 days. Mill production is typically 15–25 days after deposit, depending on size, grade and quantity. Large-diameter welded pipe and U-bent heat exchanger tube run 25–35 days.
Can you supply duplex 2507 and heat-resistant 2520 tube?
Yes. 2507 super-duplex tube for deep-sea line pipe and 2520 heat-resistant / nickel-alloy tube are two of our specialities, and 2205 and 904L are also available. These grades are made to order and quoted by size and quantity.
How is the pipe tested before shipment?
Hydrostatic, eddy-current and ultrasonic testing where specified, plus dimensional check, PMI, hardness and — depending on the standard — flattening or intergranular corrosion testing. Test reports travel with the goods.