Coupling

Casing Couplings

Casing coupling is a short length of pipe used to connect two joints of casing pipes.

It has internal threads (female thread) machined to match the external threads (male thread) of the long joints of casing pipe.

The two joints of casing are threaded into opposite ends of the casing coupling.

Specification of Casing Couplings

Casing Size OD(in)	Coupling size OD(in)	Length(in)	Weight per coupling(kg)	Quantity per pallet	Pallet weight(kg)
4 1/2	5.000	7.000	4.15	294	1220
5	5.563	7.750	5.75	210	1208
5 1/2	6.050	8.000	6.42	180	1156
6 5/8	7.390	8.750	11.34	100	1134
7	7.656	9.000	10.83	100	1083
7 5/8	8.500	9.250	15.63	80	1250
8 5/8	9.625	10.000	21.67	48	1040
9 5/8	10.625	10.500	25.45	40	1018

Tubing Couplings

Tubing Coupling can be widely used in industrial petroleum pipeline system, cold and hot water supply, heating supply, fire protection, medicinal gas, etc. It has already replaced welding fittings in most countries.

Specification of Tubing Couplings

Size	Type of Thread	O.D*L (mm)	Weight (kg)
2-3/8″	NUE	73.02*107.95	1.28
2-3/8″	EUE	77.80*132.82	1.55
2-7/8″	NUE	88.90*130.18	2.34
2-7/8″	EUE	93.17*133.35	2.4
3-1/2″	NUE	107.95*142.88	3.71
3-1/2″	EUE	114.30*146.05	4.1
4″	NUE	120.65*146.05	4.35
4″	EUE	127.00*152.40	4.82
4-1/2″	NUE	132.08*155.58	4.89
4-1/2″	EUE	141.30*158.75	6.05

Couplings are manufactured with best coupling stock from mills that have undergone our stringent qualification process. All our couplings are made as per latest  API Specifications.  The Grades: H40,J55, K55, N80, R95,L80, C90, T95, P110, Q125.