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. Hebei Yanshan County Electricity Pipe-Fittings . .

ASTM ASME
ST37 , ST52
12 Cr Mo , 15 Cr Mo

1/2"~24", DN15~DN600 OD21.3MM~609.6MM

GB/T3091-2008, API SPEC 5L

Q195, Q215, Q235, Q345B, X42, X52, X60