Ruimai produces and supplies a wide range of duplex steel pipes / duplex pipes, super duplex steel pipes as below:

1) Size Range of duplex pipe / super duplex stainless steel pipe:

Outside diameter 6~273mm X Wall thickness 0.5~20mm

2) Available Materials of duplex steel pipes / super duplex stainless steel pipe:

UNS Steel grades: S31500,S31803,S32205,S32760,S32750, 904L etc
Duplex steel in EN /DIN grades: 1.4462, 1.4510, 1.4539

3) Executive standards of Duplex pipe/ super duplex stainless steel pipe & tubes:

ASTM A789,ASTM A790, EN 10216-5 

The high mechanical strength of duplex grades is a result of the duplex microstructure and the alloying with nitrogen. This high strength gives opportunities for reducing both weight and cost as a thinner material can be used. Low nickel content of the duplex grades makes them price stable.