1. There are two types: tubing pup joint, and casing pup joint.
2. Pup joints production in accordance with "API SPEC 5CT and 5B specification"
3. Steel grades: J55,K55,N80,N80-1,N80-Q,L80,P110
4. The tubing pup joint couplings have two types NU and EU.
The casing pup joint couplings have 3 types: BC,LTC and STC
5. By numerically controlled lathe and import molding cutter,the processing of thread can be finished in one time,which ensures its commonality and interchangeability.
6. Any size,length,grade pup joint is available on customer request.
The 13Cr material is high steel grade,the use is very special.