API 5CT Tubing and Casing OCTG Coupling for Oil Field

Tubing coupling is the joining of two short length pipes by the means of female andmale threads. All types of tubing couplings have internal threads which are known as female thread forms. These thread forms are usually machined so that they can be coupled with the external threads on pipes known as male thread forms.

Tubing couplings are strictly designed as per API 5CT specification. There are two types of tubing couplings widely used in the pipeline coupling manufacturing industries namely:

• Non-upset Tubing Coupling
• External-upset Tubing Coupling

The table below shows the specifications with respect to these two tubing couplings.

API EUE Tubing Couplings Size OD Couplig Size OD (in) Length(in)

Weight Per Piece

(Kg)

Palletized Carton Quantity

(piece)

Palletized Carton Weight (Kg) 1.9 2.188 3.750 0.84 2,800 2352 2 3/8 3.063 4.875 1.55 1,414 2239 2 7/8 3.668 5.500 2.40 792 1901 3 1/2 4.500 5.750 4.10 448 1837 4 4.750 5.750 4.82 320 1543 4 1/2 5.563 6.500 6.05 252 1525 API NUE Tubing Couplings 1.9 2.188 3.750 0.56 2900 1624 2 3/8 2.875 4.500 1.28 1,512 1936 2 7/8 3.500 5.500 2.34 800 1872 3 1/2 4.250 5.625 3.71 502 1863 4 4.726 5.750 4.35 382 1662 4 1/2 5.200 6.500 4.89 252 1233

Grade Colour Codes Grade Grade Type Colours For Couplings Entair Coupling Band(s) J55 Bright Green None K55 Bright Green None N80 1 Red None N80 Q Red Green L80 1 Red One Brown P110 White None