These J55, L80, N80 & P110,T95,Q125 tubing couplings are manufactured accordance with API 5CT and API5B specification:
Type – Tubing Coupling
Thread Type – EUE,NUE,Premium Thread
Grade – J55, L80, N80 & P110,T95,Q125
Standard – API5CT&API5B
Surface Treatment – Whole phosphating, or inside phosphating and outside cooper coating
Color Code – J55 Green | L80 Red with brown stripes | N80 Red with green stripes | P110 White
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.
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.
