... made of carbon steel or stainless steel, the materials conform to the JIS, ASTM a182, a105, DIN17100 flangeNAMEbutt welded cs pipe ... .STANDARDANSI, ASME, API5L, DIN, JIS, BS, , GBwe can also produce according to drawing by customers.WALL THICKNESSSch5-Sch160 XS XXS STD SIZE1/2 ...