Import Duplex Stainless Steel Tube(Seamless Pipe) — Buy in Bulk from Supplier in China

The offering is a seamless duplex stainless steel tube, marketed by Shanghai Best Alloy Co., Ltd. The product is supplied in the duplex grades S32205 and S31803 and is described as nitrogen‑enhanced to improve strength and resistance to localized corrosion. Although exact dimensions are not listed, typical industry practice provides outer diameters from 10 mm up to 200 mm with wall‑thickness schedules ranging from 5S to 80S, which can be customised per project. The tubes are manufactured to meet ASTM A790/A790M and ASME SA790M requirements, aligning with common marine and petrochemical standards.

Duplex stainless steel combines austenitic and ferritic phases, delivering higher yield strength and better pitting resistance than standard austenitic grades. The nitrogen alloying typically raises tensile strength to around 620 MPa while maintaining elongation near 25 %. A standard surface finish of Ra 0.8 µm and an outer‑diameter tolerance of ±0.25 mm are typical for seamless pipe production, ensuring reliable fit‑up in high‑pressure systems. These characteristics make the pipe suitable for oil‑and‑gas pipelines, heat exchangers and marine applications where durability under aggressive environments is essential.

Potential buyers include EPC contractors, refinery engineers and shipbuilding firms that require robust piping for corrosive media. The listing does not disclose minimum order quantities, lead times or incoterms, so interested parties should request those details directly from the supplier. Confirming the availability of mill test reports and any applicable certifications will help ensure the product meets your project specifications.

Shanghai Best Alloy Co., Ltd. is situated at No. 618 14A Jing'an District, Shanghai 200040, China. The company holds a harbour‑level trust tier and currently shows a 0 % response rate with no recorded response time, indicating that communication may require extra follow‑up.

The supplier focuses on producing duplex stainless steel seamless pipes that are nitrogen‑enhanced for higher strength. While the listing references compliance with ASTM and ASME standards, it does not provide details on production capacity, certification bodies or additional quality management systems.