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GB/T9711
GB/T9711
GB/T9711 standard specification Technical Conditions for Delivery of Steel Pipe in Oil and Gas Industry.GB/T9711 standard main steel grade:L485,L415,L390,L360,L320,L290,L245 and so on.
GB/T9711 L485 pipeline
GB/T9711 L415 pipeline
GB/T9711 L390 pipeline
GB/T9711 L360 pipeline
GB/T9711 L320 pipeline
GB/T9711 L290 pipeline
GB/T9711 L245 pipeline
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