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 |
