BV Certificates for a Seamless Stainless Steel Pipe Manufacturer

Key facts

Manufacturer · Zhejiang Xintongda Special Steel Manufacturing Co., Ltd. (浙江鑫通达特钢制造有限公司), Songyang County, Lishui, Zhejiang, China.

Global export marketing and supply · Wenzhou Xinzhe Tech Co., Ltd. (温州信哲科技有限公司) handles overseas enquiries, quotations and order coordination with the factory.

Materials Approval 82843/A0 BV · ASTM A312/A312M austenitic and ASTM A790/A790M duplex and super duplex seamless stainless steel pipe. Maximum outside diameter 323.9 mm and maximum wall thickness 12.7 mm.

Mode II Recognition SMS.W.II./127133/B.0 · Factory and quality procedures assessed under BV Rule Note NR320. The recognition schedule lists a maximum diameter of 325 mm and a maximum wall thickness of 10.31 mm.

Product certification · Applicable category IBV pipe requires a BV product certificate issued individually or by batch, as applicable.

What Bureau Veritas assesses

Bureau Veritas Marine & Offshore provides classification and materials certification services. The Materials Approval describes the pipe, manufacturing route and delivery condition. The Mode II Recognition records BV’s assessment of the named facility and its quality procedures within the stated scope.

Bureau Veritas materials and equipment certification

BV Materials Approval for ASTM A312 and A790 seamless pipe

Certificate 82843/A0 BV covers seamless stainless steel pipe made by piercing round billets, then cold drawing or cold rolling. Solution treatment is the listed delivery condition for both the austenitic and the duplex material families.

The certificate cover names the product category “Seamless Pipes and Fittings,” but the detailed schedule describes seamless stainless steel pipe only. Because the schedule lists pipe only, confirm any fittings separately with BV. Read the full three-page certificate, schedule included, before you rely on the approval for a purchase order.

Open the electronic Materials Approval in VeriStar

BV Mode II Recognition under NR320

Certificate SMS.W.II./127133/B.0 records BV’s assessment of the manufacturing facilities and quality procedures at the Songyang site for the stated scope. Its schedule covers seamless austenitic and duplex stainless steel pipe, names S31254 and S32750/S32205/S31803, and sets a maximum diameter of 325 mm and a maximum wall thickness of 10.31 mm. The recognition is maintained through periodic audits and is conditional on the applicable certificates staying valid.

Materials Approval and Mode II compared

Where both documents apply to an order, check the grade, diameter and wall thickness against both schedules. The dimensional limits alone do not establish coverage for every combination.

Wall thickness is where the two scopes differ most. A 323.9 × 12.7 mm pipe sits inside the Materials Approval but exceeds the Mode II wall limit of 10.31 mm; a 273.0 × 9.27 mm pipe is within both dimensional limits. If your order has to appear on both documents, check the grade and the OD × wall combination against both columns before quoting.

BV product certification and traceability

The Materials Approval places this pipe in category IBV under NR320, which requires a BV product certificate. The Mode II schedule says the same thing from the site side: covered products must be certified by Bureau Veritas, individually or by batch as applicable. The approval also requires works certificates for the raw materials and identification markings that support traceability, such as a heat, cast or batch number.

BV Rule Note NR320

Download and verify the BV documents

Materials Approval · 3 pagesPreview · 3 pages · 484 KB Mode II Recognition · 2 pagesPreview · 2 pages · 872 KB

Certificate numbers, dates and limits on this page are taken from the documents themselves. Check the current status with Bureau Veritas using the manufacturer name or certificate number before an order is placed.

Bureau Veritas Approval Explorer

The same works under five other schemes

Bureau Veritas is one of several bodies that have assessed the Songyang works. The same factory also holds an ABS Product Design Assessment and Manufacturing Assessment, a DNV Approval of Manufacturer (AMMM00003BT) and a Lloyd’s Register Works Approval (LR25338152WA, valid to 30 October 2028). Two TÜV SÜD documents sit outside the classification system altogether: a NORSOK M-650 qualification for offshore supply and an AD 2000 W 0 / PED 2014/68/EU certificate for European pressure equipment.

The class scopes are not interchangeable. The DNV approval covers cold finished seamless duplex pipe only, up to 323.9 mm outside diameter and 12.7 mm wall thickness; the LR approval covers pipe and tube by material category and runs to 30 October 2028. Where a project specification names more than one society, check each document against the ordered grade, size and standard rather than assuming one approval carries the other.

The two TÜV SÜD documents answer different questions again. NORSOK M-650 qualifies the manufacturing route against a Norwegian petroleum standard, with material data sheets and qualification test records behind it; the AD 2000 W 0 / PED certificate is the quality assurance route into EU pressure equipment supply, issued against EN 10216-5 and a listed set of ASTM and ASME specifications. Neither replaces a class approval, and neither is covered by it.

View ABS factory documents · View the DNV approval of manufacturer · View the LR works approval · View the NORSOK M-650 qualification · View the AD 2000 W 0 and PED certificate

BV factory certificate FAQ

Request a BV scope check for your project

Send the order details below so Wenzhou Xinzhe can coordinate a scope check with the factory and help identify the BV documents required for the project.

• ASTM specification and edition
• Grade and UNS number
• OD × wall thickness
• Quantity and delivery condition
• Piping class or intended service
• BV documents required — product certificate, Mode II reference, or both

Wenzhou Xinzhe reviews the enquiry with the Songyang factory and replies with the applicable scope.

Contact Wenzhou Xinzhe View ABS factory documents

Page reviewed 7 November 2026 against BV Materials Approval 82843/A0 BV and BV Mode II Recognition SMS.W.II./127133/B.0.