Stainless steel pipe fittings, elbow, three first-class size. Material for 304,304 L, 316,310 S, 321, both inside and outside smooth surface with little error outside diameter, wall thickness uniform, fine microstructure, mechanical properties and characteristics of corrosion-resistant and strong. Products are widely used in petroleum, petrochemical, paper, pharmaceutical, food, beer, electricity, shipbuilding, natural nuclear industry and other industries.   1, Stainless Steel Union Model: SX-510 2, Material: stainless steel 3, Stainless Steel Union standard thread: G, ISO, NPT, BSP, PG, PF, and so on.