We carry size range of 2-3/8”, 2-7/8″, 3-1/2″,4″ and 4-1/2″ in J55,
K55, N80, P110 grade. All of our couplings meet the API
Specifications 5CT/5B.
Couplings are short lengths of pipe used to connect 2 joints of
tubing or casing. They come with painted colour codes on their
external surface to indicate their grades.
API EUE Tubing Couplings
Designed in accordance with API 5CT/5B and are made of good
seamless steel. EUE petroleum tubing coupling cover the outer
diameter from 77.80mm to 141.30mm, that is bigger than the outer
diameter of the non upset threaded end product. The API
external-upset-end (EUE) tubing connection is widely used because
it is a good, serviceable connection in most wells. The EUE joint
has a designed joint strength in tension and pressure strength
greater than that of the pipe body and, therefore, is considered a
100% joint efficient connection.
API NUE Tubing Couplings
Designed in accordance with API 5CT/5B and are made of good
seamless steel. NUE tubing coupling possesses the outer diameter
range from 73.02 to 132.08mm. API nonupset (NUE) tubing is used
much less than EUE tubing. The cost of NUE is only slightly less
than EUE, and the joint strength is substantially less. The
coupling joint diameter of NUE is less than EUE, which offers some
advantages when clearance is small.
1.Size: 2-3/8” 2-7/8″, 3-1/2”, 4″, 4-1/2″
2.Standard: API 5CT /5B
3.Type: EUE NUE
4.Grade:J55/K55/N80/L80/P110
5.Packaging: wooden pallet, tight wrapped /W paper carton
Raw Material Selection
Mechanical test including tensile strength
Impact test
Chemical properties control
Sulfide stress cracking test (for Material grades in C90 or T95)
Size tolerances, OD, Wall Thickness, Length and Straightness
Threads control, threads quantity per inch, threads angle etc
(Premium threads option will be more rigorous)
Heat treatment
Additional markings
Material certification
Product Specification Level (PSL-2 or PSL-3)
