| Message: | Pipes and Tubes for Ship-BuildingSTANDARD：GB/T5312—china national standardCLASSIFICATION OF SHIPS:ABS, DNV, LR, BV, CCS, KR, NKGRADES：StandardGrade/Classification of shipsGB5312320, 360, 410, 460, 490ClassificationABS, DNV, LR, BV, CCS, KR, NKSIZE RANGE:1/2"-38" O.D. x 2-120mm Thickness url:http://www.ruichengsteel.com |
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