Super Duplex S32750 Large Diameter EN10253-2 Stainless Steel Butt Weld Reducer

This super duplex S32750 large diameter EN10253-2 stainless steel butt weld reducer is a high-specification pipe fitting that combines three critical advantages in one product: the superior corrosion resistance and high strength of super duplex UNS S32750, the capability to be manufactured in very large diameters up to 72 inch, and full conformity to the European EN 10253-2 standard. Designed for large-bore process and seawater piping, this super duplex stainless steel butt weld reducer transitions between pipe sizes while maintaining a uniform, robust wall and a reliable butt weld connection, making it an ideal choice for large-scale desalination plants, offshore water injection systems and chemical process headers that demand both size flexibility and chloride resistance.

To produce this large diameter super duplex reducer, our team rolls and welds certified S32750 plate, performs full penetration longitudinal welding, and applies post-weld heat treatment to restore the corrosion-resistant microstructure. The weld is inspected by radiography or ultrasonic testing, and the finished fitting is gauged against EN 10253-2 tolerances for large and small end diameters, wall thickness and bevel preparation. Ferrite measurement and positive material identification confirm that the super duplex S32750 grade is retained throughout, while EN 10204 3.2 certification provides complete documentation for offshore and large-bore project acceptance.

Product Specifications

Key Advantages & Applications

• Super duplex S32750 provides about double the strength of 316L and outstanding pitting resistance.
• Large diameter capability up to 72 inch suits oversized process and seawater headers.
• EN10253-2 conformity streamlines European and offshore project approvals.
• Butt weld ends ensure a permanent, high-integrity joint for demanding services.
• Fully traceable with EN 10204 3.2 and optional NORSOK M-650 documentation.
• Post-weld heat treatment restores the duplex structure after plate rolling and welding.

Frequently Asked Questions

Q: Can this super duplex reducer be made in very large diameters?
A: Yes, the large diameter stainless steel butt weld reducer can be manufactured up to 72 inch and beyond for special projects.

Q: Which standard does it follow?
A: It is produced to EN 10253-2 and can also meet ASME B16.9 dimensions on request.

Q: Is S32750 suitable for seawater service?
A: Yes, super duplex S32750 is widely used in seawater and chloride environments due to its high PREN value.

Q: What documentation is provided?
A: We supply EN 10204 3.2 inspection certificates, mill test reports and NORSOK M-650 qualification when required.

Q: How is the large diameter weld quality verified?
A: The longitudinal weld is inspected by radiography or ultrasonic testing to confirm full penetration and freedom from defects.

Ordering, Packing & Delivery

Please confirm the required material grade, end diameters, wall thickness schedule, applicable standard and quantity when placing your enquiry, and our team will respond with a detailed quotation, production lead time and available inspection options. Each fitting is cleaned and dried, then packed into reinforced plywood cases or pallets with clear shipping marks to prevent damage during transit. We support sea freight, air freight and express courier delivery, and provide packing lists, material certificates and other export documents before dispatch to keep your customs clearance smooth.