casing and tubing coupling

★Standard: API Spec 5CT and 5B
★Grade: J55, K55, N80-1, N80Q, L80-1, C90, C95, T95, P110;
★Thread: NUE, EUE, VAM, STC, LTC, BTC;
★Packing: carton, wooden case, wooden pallet or customized;

Casing and tubing couplings are short lengths of pipes applied to connect two joints of casing and tubing. They are painted different color codes on their external surface to indicate their grades. Casing coupling and tubing coupling are manufactured according to API 5CT and 5B specifications.

Casing Couplings Short Thread Specifications:

Casing Couplings Short Thread	Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	4-1/2	5.000	6.250	8.05	343	2716
	5	5.563	6.500	10.18	210	2168
	5-1/2	6.050	6.750	11.44	216	2501
	6-5/8	7.390	7.250	19.97	115	2322
	7	7.656	7.250	18.34	120	2231
	7-5/8	8.500	7.500	26.93	80	2322
	8-5/8	9.625	7.750	35.58	60	2132
	9-5/8	10.625	7.750	39.51	50	2006
	10-3/4	11.750	8.000	49.61	45	2079
	11-3/4	12.750	8.000	50.49	35	1767
	13-3/8	14.375	8.000	56.23	25	1436
	16	17.000	9.000	78.98	20	-
	18-5/8	20	9.000	118.94	10	-
	20	21.000	9.000	98.25	10	-

Casing Couplings Long Thread Specifications:

Casing Couplings Long Thread	Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	4-1/2	5.000	7.000	9.07	294	2697
	5	5.563	7.750	12.56	210	2573
	5-1/2	6.050	8.000	14.03	180	2555
	6-5/8	7.390	8.750	24.82	100	2315
	7	7.656	9.000	23.67	100	2351
	7-5/8	8.500	9.250	34.23	80	2807
	8-5/8	9.625	10.000	47.48	48	2337
	9-5/8	10.625	10.500	55.77	40	2302
	10-3/4	11.750	* 10.500	* 62.38	45	* 36
	11-3/4	12.750	* 10.500	* 67.59	30	* 24
	13-3/8	14.375	* 10.500	* 76.63	25	* 20
	16	17.000	* 11.000	* 96.55	20	* 16
	18-5/8	20.000	-	-	10	8
	20	21.000	* 11.500	* 126.74	10	8
	* NOT API SPECIFICATIONS.

Casing Coupling - Buttress Thread

Casing Couplings Buttress Thread	Casing Size OD (inches)	Coupling Size OD(inches)	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	4-1/2	5.000	8.875	10.11	196	2007
	5	5.563	9.125	12.99	144	2840
	5-1/2	6.050	9.250	14.14	144	2061
	6-5/8	7.390	9.625	24.46	92	2295
	7	7.656	10.000	23.22	80	2068
	7-5/8	8.500	10.375	64.84	64	2221
	8-5/8	9.625	10.625	45.94	48	2414
	9-5/8	10.625	10.625	50.99	40	2256
	10-3/4	11.750	10.625	56.68	36	2307
	11-3/4	12.750	10.625	61.74	24	2179
	13-3/8	14.375	10.625	69.95	20	1429
	16	17.000	10.625	87.56	16	-
	18-5/8	20.000	10.625	138.03	8	-
	20	21.000	10.625	110.33	8	-

Tubing Couplings - External Upset End (EUE):

EUE Tubing Couplings	Casing Size OD (inches)	Coupling Size OD (inches)	Threads per inch	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	1.90	2.500	10 Round	-	1.85	-	-
	2-3/8	3.063	8 Round	4.875	3.42	1,444	3942
	2-7/8	3.668	8 Round	5.500	5.29	792	4220
	3-1/2	4.500	8 Round	5.750	9.02	448	3860
	4	5.000	8 Round	-	10.62	392	-
	4-1/2	5.563	8 Round	6.500	13.31	252	3456

Tubing Couplings - Non Upset End (NUE)

Non-Upset Tubing Couplings	Casing Size OD (inches)	Coupling Size OD (inches)	Threads per inch	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	1.90	2.200	10 Round	3.750	1.85	-	-
	2-3/8	2.875	10 Round	4.500	2.82	1,512	4264
	2-7/8	3.500	10 Round	5.500	5.15	800	4120
	3-1/2	4.250	10 Round	5.625	8.17	502	4101
	4	4.75	8 Round	5.75	9.57	392	-
	4-1/2	5.200	8 Round	6.500	10.76	252	2712

Coupling Pipe Grade Identification By Paint Color