Coupling

Min Order

1
Product Unit

Pieces
Price

$ 7.36 - 14.69
Origin

China Mainland
Payment
Contact Now Start Order

Description

Product Detail

Dimensions of Tubing API Coupling (NU)

Size Range: 2-3/8", 2-7/8" and 3-1/2" OD for Tubing
4-1/2" -20" OD for Casing
Thread type: 8RD, 10RD for Tubing(also called EU and NU)
BTC, LTC, STC for Casing
Also supply the customization threads as per client’s drawings.
Features:
1. Coupling is produced through tube rolling, heat treatment, threading and other procedures.
2. Surface treatment: Phosphating
3. Accordance with API 5CT and 5B standards.
4. Inspection includes Non-destructive testing, Hydrostatic pressure(Max.120 MPa).

If you are looking for competitive, high quality and fast delivery oilfield coupling in stock, or if you are planning to buy coupling API from one of the leading casing and tubing couplings, phosphating coupling, eue(8rd) and nue(10rd) coupling, premium connection coupling, casing and tubing collar gas tight connection manufacturers and suppliers China, please feel free to contact VIGOR.

1. Dimensions of Tubing API Coupling (NU)

Size	OuterDiameter of Tubing	Outer Diameter of Coupling	Min. Length of Coupling	Piece Weight (kg)	Suggested Size (Outer Diameter * Wall Thickness)
1.900	48.26	55.88	95.25	0.56	55.9 * 8
2-3/8	60.32	73.02	107.95	1.28	73 * 11
2-7/8	73.02	88.90	130.18	2.34	88.9 * 12.5
3-1/2	88.90	107.95	142.88	3.71	108 * 15
4	101.60	120.65	146.05	4.35	120.7 * 15.5
4-1/2	114.30	132.08	155.58	4.89	132 * 15

2. Dimensions of Tubing API Coupling (EU)

Size	Outer Diameter of Tubing	Outer Diameter of Coupling	Min. Length of Coupling	Piece Weight (kg)	Suggested Size (Outer Diameter * Wall Thickness)
1.900	48.26	63.50	98.42	0.84	63.5 *9.5
2-3/8	60.32	77.80	123.82	1.55	77.8 *11.5
2-7/8	73.02	93.17	133.35	2.40	93.17 *13
3-1/2	88.90	114.30	146.05	4.10	114.3 *15.5
4	101.60	127.00	152.40	4.82	127 *16
4-1/2	114.30	141.30	158.75	6.02	141.3 *17

3. Dimensions of Casing API Coupling

Casing Specification (mm)	Outer Diameter of Coupling (mm)	Round Thread				Buttress Thread
		Short Round Thread		Long Round Thread		Buttress Thread
		Min. Length (mm)	Weight (kg)	Min. Length (mm)	Weight (kg)	Min. Length (mm)	Weight (kg)
114.30	127.00	158.75	3.62	177.80	4.15	225.42	4.55
127.00	141.30	165.10	4.66	196.85	5.75	231.78	5.85
139.70	153.67	171.45	5.23	203.20	6.42	234.95	6.36
177.80	194.46	184.15	8.39	228.60	10.83	154.00	10.54
193.68	215.90	190.50	12.30	234.95	15.63	263.52	15.82
244.48	269.88	196.85	18.03	266.70	25.45	269.88	23.16
273.05	298.45	203.20	20.78	-	-	269.88	28.03
339.73	365.12	203.20	25.66	-	-	269.88	31.77

4.API Coupling

	Size	Type	Outer Diameter (0 / 1%)	Wall Thickness (0 / 2.5%)
API Tubing	2 3/8	NU	73.00	12
	2 3/8	EU	77.80	12
	2 7/8	NU	88.90	13
	2 7/8	EU	93.20	14
	3 1/2	NU	108.00	14
	3 1/2	EU	114.30	15
	4	NU	120.70	15
	4	EU	127.00	15
	4 1/2	NU	132.10	15
	4 1/2	EU	141.30	16
API Casing	4 1/2	STC	127.00	12
	4 1/2	LC	127.00	12
	4 1/2	BC	127.00	12
	5	STC	141.30	13
	5	LC	141.30	14
	5	BC	141.30	13
	5 1/2	STC	153.70	13
	5 1/2	LC	153.70	14
	5 1/2	BC	153.70	13
	6 5/8	STC	187.70	17
	6 5/8	LC	187.70	17
	6 5/8	BC	187.70	16
	7	200.03	200.03	15
	7	LC	200.03	16
	7	BC	200.03	15
	7 5/8	STC	215.90	18
	7 5/8	LC	215.90	19
	7 5/8	BC	215.90	18
	8 5/8	STC	244.50	20
	8 5/8	LC	244.50	21
	8 5/8	BC	244.50	20
	9 5/8	269.90	269.90	21
	9 5/8	LC	269.90	22
	9 5/8	BC	269.90	20
	10 3/4	STC	298.50	21
	10 3/4	BC	298.50	20
	11 3/4	STC	323.90	21
	11 3/4	BC	323.90	21
	13 3/8	STC	365.10	22
	13 3/8	BC	365.10	21

5. Pipe Stenciling
Spray colors on the outer surface of coupling and then spray chromatic circles as follows:

Grade	Oil Casing Chromatic Circle	Coupling Color
Grade	Oil Casing Chromatic Circle	Integrated Coupling	Color Bar
J55 Tubing	One Bright Green Line	Bright Green	-
J55 Casing	One Bright Green Line	Bright Green	One White Line
K55	Two Bright Green Lines	Bright Green	-
N80-1	One Red Line	Red	-
N80-Q	One Red Line, One Bright Green Line	Red	Green
L80-1	One Red Line, One Brown Line	Red	One Brown Line
P110	One White Line	White	-