API 5L GR.B PSL1 pipe Pipe tubeSeamless welded carbon LSAW SAW ERW DSAW steel pipe tube size1/2''~56'' thicknessSCH5S~XXS Pipe endPE BE Carbon steel pipe SMLS/ERW/LSAW/SAW/DSAW PSL 1: API 5L GR.B X42 ...
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