21 / May.
The Steel Standard and Grade We Use Often in Steel Pipes and Fittings
1.Welded Steel Pipe:API SPEC 5L A25, A25A, B, X42, X46, X52, X56, X60, X65, X70, X80, X90, X100ASTM A53/ASME SA53 Grade A, Grade B,ASTM A106/ASME SA106 Grade A, Grade B, Grade CASTM A210/ASME SA210 Grade A-1, Grade CASTM A500/ASME SA500 Grade A, Grade B, Grade C, Grade DASTM A501/ASME SA501 Grade A, Grade BASTM A556/AS
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