All of the products are produced and processed according to API standard, with materials of steel grade including J55, K55, N80, N80-1, N80-Q, L80, P110, etc. The tubing couplings have two types of threads NU and EU. By numerically controlled lathe and import molding cutter, the processing of thread can be finished in one time, which ensures its commonality and interchangeability. we have complete testing abilities, adopting a whole set of single testing apparatus of thread, including tape, pitch, tooth depth and profile. Our products have already passed the identification of the Quality Testing and Inspection Center of Oil Pipe of CNPC (China National Petroleum Corporation).
When ordering, please specify:
The size of the pup joints.
Email : email@example.com
The thread, Weight, grade and length