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Cangzhou tianyi co.,ltd can produce the ERW steel pipe.The standard is JISG3466-1988
1) square tubes specification: 15 15-120 * * 120mm thickness 0.4-3.0 mm
2) distance pipe specifications: 20, 30-80 * * 100mm thickness 0.4-2.5 mm
3) pipe specifications: 10-114mm thickness 0.4-2.5 mm
JISG3466 steel pipe
