... origin:China 5.Certificate:API.ISO9001:2000.BV structure seamless pipeHebei shengtian (group) seamless steel pipe Co,. LtdWe manufacture ... FBE internal coating for water steel pipes.10.MaterialA53(A,B),A106(B,C)Q235B,Q345B,16Mn, 10# ... 20#,45# S235JR, S355JR;ASTMA252 Gr.2,Gr.3; ST37,ST42,ST52;Gr.B,X42,X46,X52,X56,X60,X65 ... , France, England, the Netherlands,Belgium, etc13.CertificatesAPI 5L; ISO9001:2000