Mark & model ： Diameter: 21.3mm~660mm; WT:2.5mm~60mm; Material: GrB~X70; Used for the transportation of gas, water and oil in petroleum and n ...
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Mark & model ： Diameter: 219mm~3620mm; WT: 5mm~26mm; Material: GrB~X100; Used for the transportation of gas, water and oil in petroleum and n ...
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Mark & model :Diameter: 219mm~3620mm; WT: 5mm~26mm; Material: L245-L555; (National Standard, also called Petroleum and natural gas industries-Steel pi ...
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