Tianjin dalipu oil country tubular goods co., ltd is currently an emerging production and marketing enterprise based production casing and tubing.located in tianjin, near the capital beijing, and tianjin port the largest port in north of china, owning convenient transportation, unique geographical conditions. with api 5ct oil casing and api 5l oil line pipe as the main products,with production and sales integration, professional domestic and foreign trade operations, strength financial , rich experience. our company has fixed assets of 5 million cny, covers an area of 10,000 square meters, more than 60 employees,annual turnover of 300 million cny , and has the right to import and export, to meet the domestic market, while high quality products and services with many international famous enterprises to establish a long term supplier relationships, such as saudi arabia, united arab emirates, the netherlands, canada, mexico, india, sudan, kuwait, turkey, the middle east, europe, africa, south america and other countries. products: oil casing, tubing, line pipe, seamless steel pipe, steel pipe(astm/api/asme/dn/bs/jis/en),alloy seamless steel pipe. performing standard:api-5ct api-5l astm- a106-gr.b astm- a53 din bs jis en. size of oil tubing: 1.9"-4 1/2" ends: nue/eue. size of oil casing: 4 1/2" -20"ends connection: stc/ltc/btc, premium connections. we can manufacture all kinds of pup joint of tubing and casing, coupling with left ype and right ype. steel grade(materials):h40,j55,k55,n80,l80,c-90,c95,t95,p110,q125,13cr-80,13cr-110,super 13cr.