ASTM A53 Grade B welded steel pipe is an industrial steel pipe,ASTM A53 Gr.B steel pipe used for liquid conveying, structural pipe, fence and door pipe, construction, for low pressure liquid conveying, such as water, gas and oil, acceptable chemical composition analysis, mechanical properties, technical performance, Hydraulic test, X-ray test, HY, ET and other tests, usually painted black as required rust protection.
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