China API Seamless Steel Pipe Couplings chain coupling

Merchandise Description Seamless metal pipe:Merchandise DescriptionNormalAPI A106 GR.B A53 Gr.B seamless steel pipe / ASTM A106 Gr.B A53 Gr.B steel tubeAP175-79, DIN2I5L , ASTM A106 Gr.B, ASTM A53 Gr.B,ASTM A179/A192/A213/A210 /370  WP91, WP11,WP22.DIN17440,...