1.Specification:SSAW steel pipe line pipe 2.Size: from 219" to ... steel tbesand pipesfor casingAPI SPEC 5CTJ55, N80APISeamless steel tubes foroil casing andtubing in oil wellsAPE SPEC 5LA, ... 20ASTM A179, ASTM A192 ASTM SA179,SA192,BS3059Seamless Steel Tubes for high pressure --Chemical fertilizer equipmentGB6479-8610, 20G ... .Specification: API 5L GR.B SSAW steel pipe line pipe ,2.Size: from 219" to 2420", ...