... pipe 2>standard :ASTM DIN BS API etc. 3>materials :J55, K55 ,N80,P110,L80 etc specification Discription about our special pipe:Items seamless ... steel pipesMaterials J55, K55, N80, P110, L80/Gr.B x42, x46, x52, x56/x65, x70, and more Standards API 5L, API ... 5CT, ASTM A106, ANSI, ISO9001, DIN17175, EN, JISCertificate API 5L/5CT, ISO 9001: ...