... manufacturer and exporter the following products: 1.SAWL / LSAW / ERW / EFW WELDED STEEL PIPES;GOST 10704- ... WELDED STEEL LINE-END TUBES WITH 3PE,3PP,EPOXY,FBE,CEMENT ANTICORROSION;OD406mm~1422.4mm, ... ELECTRICALLY WELDED SPIRAL SEAM STEEL PIPES WITH 3PE,3PP,EPOXY,FBE,CEMENT ANTICORROSION ; OD219mm~3620mm,WT ... GOST 8732-78 SEAMLESS STEEL PIPES WITH 3PE,3PP,EPOXY,PITCH,ZINCRICH ,FBE,CEMENT ANTICORROSION;OD ...