Dongying Chengxiang Mechanical Co.,Ltd.is located in Dongying City,Shandong Province,which is known as the manufacturing base of petroleum equipment in China, also called China Houston.It is established in 2012 with registry capital of RMB 50 Million.All casing pipe,oil tubing and coupling can cover all grade of steel,thread under API Standard.Production capacity for casing pipe and oil tubing is 600,000 tonsper year and coupling is 500,000 pieces per year.Completed quality management system has been conducted by us,ISO9001/2008 quality system certification and occupational health and safety management system has been passed.In 2016,we obtained the right of use API Monogram, all products strictly conformed with API SPEC 5B Standard.Main product include API 5CT Casing pipe,oil tubing,coupling and pup joint.Grade of steel cover J55,K55,N80,L80 and P110.Thread of oil tubing are EUE,EUP,EUB,NU,and NEW VAM.Thread of casing pipe are LTC,STC,BTC and other special thread.