Duplex Steel Pipes Leveraging on our finest manufacturing unit and experience work force, our company offers stainless and Duplex Steel Pipes. Our high quality pipes are stainless because of a protective layer on their surfaces which reduces the rate of corrosion to almost negligible levels. Available in different grades and dimensions, these stainless steel and duplex steel pipes are widely used in various industries such as construction, cement, petrochemical and more. Specification:-Duplex Steel: ASTM / ASME 790 UNS no S 31803, S 32205, S 32550, S 32750, S 32760. Size Range: Size:1/8" NB to 16" NB in Sch 5 S, 10 S, 20 S, 40 S, XS, 80 S, 100 S, 120 S, 160 S, XXSInch OD size:1/4" (6.35 mm) to 4" (101.6 mm) in 0.7 mm to 3 mm thickness