... ,JIS,BS satandard Company : Shandong Donghai Steel Pipe Co., Ltd. name seamless steel pipe for oil fieldBrand namedonghai steel pipeStandardAPI 5CT ,API 5L,ASTM A53 ... /transparent an-ti rust oil, galvanizedUsagePetroleum, chemical, power, gas, industrial, ship building, constructionContact :Emily: 86-15066453209 ZGL GROUP Certificate: ISO9001,API ...