... . 3.Standard : GB , API,JIS CommodityOil casing pipe/tubePlace of originTianjin , China(Mainland)StandardAPI,GBMaterialJ55 ... /brightBrand NamePetroleum, oil , gas, chemistry, electrical power, metallurgy,etcPackingBundles,sea-worthy or wooden cases, or ... orderQualityHigh qualityProductivity1000MT/ WeekMOQ10MTApplication Generally used in oil casing, conveying gas and oil,chemical industry,etc ...