... , 304L, 316, 316L, 317L, 310S, 904L, etc. 3) Type: Welding neck, Socket welding, Slip-on, Threaded, Lap joint, Blind, etc. 4) Size ... made of steel plate from D630mm to D3320mm 5, Socket welding pipe fittings from D3mm to D159mm 6, High-medium-low ... products.TJGH has advanced production lines including four hot strip tube production lines and four heat treatment production lines. The company has a ...