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Welded steel pipes Specifications ERW Standard: ASTMA53(GR.A /GR.B) API 5L(X42 X46 X52 X60 X65 X70 X80) API 5CT(K-55 J-55 N-80 P-110) Size Range: OD 60mm-610mm Thickness Wall: 6mm-18mm LSAW Standard: ...