we stock standard sizes and grades of Stainless Steel SS304 & SS316, but we also do maintain huge inventories of Alloy Steel based seamless pipes in 304H, 316H, 309S, 310S, 317L, 321H, 347H, 904L, 330, 254SMO, 410. We also stock Duplex and Super Duplex Seamless Pipes.This specification covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.