... , S440, SQ235(CS20#),A106B ,A53,Q345 and etc. SS:304,316,304L,316L A350LF2 A182 and etc.Style: SO, WN, SW, THR ... , MSS, API,AWWA, JIS, DIN, UN,EN,BS,GOST, NFE and etc.Size: 1/2~120 (3000mm)Non-standard: unit piece ... with diameter below 3 meters and unit weight below 4 MTs, according to customers drawing.Certificate ...