Businesses

(Super) Duplex Stainless Steel Pipe/Tube

Duplex stainless steel (DSS) is featured with structure of two phases (α and γ) and has characteristics of both ferritic and austenitic stainless steel. It has best corrosion resistance and high strength. In general, when the content of C is low, the content of Cr and Ni ranges from 18% to 28% and 3% to 10% respectively. Some steels also contain the alloy elements such as Mo, Cu, Nb, Ti and N, etc.

Product Center

Grades

Standards

01

ASTM

ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe for General Service
ASTM A790 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe for General Service
ASTM A928 Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal

02

ASME

ASME SA789  Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASME SA790  Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASME SA928 Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal

03

GB

GB/T 21833 Austenitic - Ferritic (Duplex) Grade Stainless Steel Seamless Tubes and Pipes
GB/T 21832 Austenitic - Ferritic (Duplex) Grade Stainless Steel Welded Tubes and Pipes

Features

Application field

Petrochemical industry: Oil and gas industry pipelines, piping, heat exchanger tubes; industrial pipelines such as phosphoric acid and sulfuric acid.
Marine environment: Offshore platform pipeline tubes, seawater condenser pipes, underwater umbilical cables, fire fighting system pipes, desalination equipment pipes, etc.