HENAN DONGFANGLONG MACHINE MANUFACTURE CO.,LTD was founded in 1999 and located at intersection of 106 National Highway and Jintian road, Puyang, Henan, China. We have over 15years experience of producing , developing and selling oil pipes and their accessories, steel pipe fittings and other down well tools. We can supply the related certifications for you as follow.

• ISO 9001 QUALITY CONTROL CERTIFICATE
• API - 5CT CERTFICATE WITH THE NO. 5CT-0837
• API - 7 CERTIFICATE WITH THE NO. 7-0872
• API - 5DP CERTFICATE WITH THE NO. 5DP-0135

The company has a fixed assets of over 570 million RMB, and is staffed with over 200 employees, almost hundred sets of ACCURATE CNC lathes, auxiliary equipments and developed other machines and testing equipments. Our own trademark has been registered and approved since February 2010.

The main products of our factory is as follow: Tubing and casing couplings size from 1.9” to 20” with various material and types, pup joints, all kinds of tool joints, and other down well tools that designed and developed by our own such as: High efficient cyclone separator, tubing centralizer, Spiral-flow sand setting device and so on. Now our production capability has reached 3000000 piece per year.

We are the regular suppliers of Petrochina and Sinopec. From 2009, our market have expanded abroad out of china. Our products have already been used in USA, Brazil, Venezuela, India, Kazakhstan, Indonesia and so on. We will hope to cooperate with you by our high quality products and excellent service.

 oil machine API pipe fittings tubing coupling &casing coupling

API Coupling

Casing Coupling

Standard: API Spec 5CT, API Spec 5B

Grade: H40,J55,K55,N80-1,N80Q,L80,C95,T95,P110

Specification: OD127~365.12mm(4 1/2”~13 3/8”)

Thread: STC, LC, BC

Usage: has internal thread to join the casing pipes which are also with thread.

Tubing Coupling

Standard: API Spec 5CT, API Spec 5B

Grade: H40,J55,K55,N80-1,N80Q,L80,C90,T95,P110

Specification: OD55.88~141.3mm(1.9”~4 1/2”)

Thread: EU, NU, SCC(Special Clearance)

Usage: has internal thread to join the tubing pipes which are also with thread.