... , Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessCJ/T 3022 Spiral submerged-arc welded steel pipe for municipal heat ... , St14, St33, St37, St44, ST52ASTM A 53: Gr. A, Gr B, Gr C, Gr.DAPI 5L: A, B, X42, X46, X52, X56, X60, X65 X70GB/T9711 ... , L390, L415, L450, L485, L555GB/T3091, SY/T5037, SY/T 5040,CJ/T 3022:Q195, Q215, Q235, Q275, Q295, Q345Size:Outer Diameter ...