China Manufacturer Black Steel Pipe Rectangular Steel
China manufacturer black steel pipe rectangular steel pipe/tube for building material welded black steel pipe/tube . Standard: ASTM A500, BS1387,GB3091,ASTMA53, B36.10, BS EN1029, GB/T9711, JIS G3466,EN 10219, GB/T 3094-2000,GB/T 6728-2002, API 5L, ASME B36.10M-1996, ASTM A106/A53 GRB GB8163-1999. Material. Carbon steel. Q195 → Grade B, SS330 ...
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