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Tubing Couplings

CNC lathes for tubing and casing couplings and CNC tubing threading machines for tubing and pup joint production are equipped combine with a complete set of the thread gauges. A rigid controlled Inspection / testing process include MPI and hydraulic pressure test ensures a reliable and constant conformity to the quality standard. The computerized marking printer is used for feasible quality traceability.

COSTRENGTH PETRO‐CHINA Machinery Co., Ltd. was granted the Certificate of Authority to use the Official API monogram with API 5CT‐1206 for the tubing/casing couplings and the threaded tubing, pup Joint products.    

Specification of Tubing Couplings
Description Size (in) OD. (mm) M.T. (mm)
Tubing Coupling UN 2-3/8' 73.03 107.95
2-7/8 ' 88.90 130.18
3-1/2” 107.95 142.88
4-1/2” 132.08 155.8
Tubing Coupling EUE 2-3/8" 77.80 124
2-7/8" 93.17 133.35
3-1/2" 114.30 146.05







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Subsidiary of CONSTRENGTH PETRO-CHINA Machinery Co., Ltd. Copyright @ 2012 Dynatec International Ltd.