Stainless pipes are widely applied in petro-chemical works, smelt, irrigation works, electricity works, medical equipments, refrigeration, aviation, etc.. Quality can be in accordance with GB, ASTM, JIC, DIN, OST standards as requested by customers. Specifications vary from 6.5 to 1016. Wall thickness 1.2—9.0. ERW stainless pipes are specified among 6.5---273 with thickness among 0.6----4.0 and shapes in square, rectangle and oval.