... , or paintedC: Length of each pipe: 500mm-16,000mmD: Steel grade: 10#, 20#, A106B, A53B, Q195 Q235, Q345, ST37-2 ... , 316 etcE: Conforms to international standards, like: ASTM A53, ASTM A500, ASTM A513, ASTM A312, BS1387, DIN2391, DIN2394, DIN17175, JIS G3452, EN10210, EN10219, EN10025 ... C,A210-A-1,A315-B,AISI1020),45#(AISI1045), 16mn(ASTM A210-C) etc.Usageboiler use,water transport, building, machinery, ...