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Casing Coupling

Product: Casing and Tubing Coupling, Casing Coupling, Tubing Coupling
Application: Used to connect 2 joints of tubing or casing
Size: Tubing Coupling : 1.9'' - 4-1/2'', Casing Coupling : 4-1/2'' - 13-3/8''
Pipe Standard: API 5CT and 5B PSL1/PSL2 J55,K55,N80-1,N80-Q, API 5CT and 5B L80-1,C90, C95,T95, P110, Q125
Surface: Whole Phosphating or inside phosphating and outside coating
Thread: NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM, HYDRILL CS
Packing: By carton, wooden case, wooden pallet, or requirement of customer
Delivery: Within 10-30 days and depends on your order quantity
Payment: TT, LC , OA , D/P

Availability:

Couplings are short lengths of pipe used to connect 2 joints of tubing or casing. They come with painted color codes on their external surface to indicate their grades. Standard:API Spec 5CT and 5B Tread types: NUE, EUE, VAM, STC, LTC, BTC, special clearance, XC,VAM TOP,NEW VAM.

Oil and Gas Couplings are short lengths of pipe used to connect 2 joints of tubing or casing. They come with painted color codes on their external surface to indicate their grades.

oil casing couplings and oil tubing couplings have different thread types.

Standards and Technical Conditions for Supply:API Spec 5CT and 5B

Size: 1.9” --20”

Grade: J55,K55,N80-1,N80Q,L80-1,C90,C95,T95,P110,Q125

Thread types of couplings: NUE, EUE, VAM, STC, LTC, BTC, special clearance, XC,VAM TOP,NEW VAM.

Packing: by carton, wooden case, wooden pallet or customized

 

Stainless Steel Coupling

ASTM / ASME SA A182 F304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904

Carbon Steel Coupling

ASTM/ ASME A 105, ASTM/ ASME A 350 LF 2

Alloy Steel Coupling

ASTM / ASME A182 F1/ F5/ F9/ F11/ F22/ F91

Nickel Alloy Coupling

ASTM / ASME SB 336 UNS 2200 (NICKEL 200) , UNS 2201 (NICKEL 201 ) , UNS 4400 (MONEL 400 ) , UNS 8020 ( ALLOY 20 / 20 CB 3 ) , UNS 8825 INCONEL (825) , UNS 6600 (INCONEL 600 ) , UNS 6601 (INCONEL 601) , UNS 6625 (INCONEL 625) , UNS 10276 (HASTELLOY C 276)

Duplex Steel Coupling

ASTM A 182 – F 51, F53, F55 S 31803, S 32205, S 32550, S 32750, S 32760

 

Steel Pipe Coupling are used to connect two pipes or tubes together by screwed ( threaded) or socket welding. It comes in many shapes and sizes.

Threaded Reducing Couplings

Threaded Reducing Couplings

Full Threaded Couplings

Full Threaded Couplings

Half Threaded Couplings

Half Threaded Couplings


Tubing Coupling 

Tubing coupling specifications

OD mm

 Min length mm

Weight kg

NU

EN

NU

EN

NU

EN

1 8/9

55.88

63.50

93.25

98.42

0.56

0.84

2 3/8

73.02

77.80

107.95

123.82

1.28

1.55

2 7/8

88.90

93.17

130.18

133.35

2.34

2.40

3 1/2

107.95

114.30

142.88

146.05

3.71

4.10

4.00

120.65

127.00

146.05

152.40

4.35

4.82

4 1/2

132.08

141.30

155.58

158.75

4.89

6.05


Casing Coupling

Size

Thread Type

O.D & Length (mm)

Weight for each (kgs)

4-1/2"

STC

127.00 * 158.75

5.23

LTC

127.00 * 177.80

4.15

BTC

127.00 * 225.42

4.55

5"

STC

141.30 * 165.10

4.66

LTC

141.30 * 196.85

5.75

BTC

141.30 * 231.78

5.85

5-1/2"

STC

153.67 * 171.45

5.23

LTC

153.67 * 203.20

6.42

BTC

153.67 * 234.95

6.36

6-5/8"

STC

187.71 * 184.15

9.12

LTC

187.71 * 222.25

11.34

BTC

187.71 * 244.48

11.01

7"

STC

194.46 * 184.15

8.39

LTC

194.46 * 228.60

10.83

BTC

194.46 * 254.00

10.54

7-5/8"

STC

215.90 * 190.50

12.30

LTC

215.90 * 234.95

15.63

BTC

215.90 * 263.52

15.82

8-5/8"

STC

244.48 * 196.85

16.23

LTC

244.48 * 254.00

21.67

BTC

244.48 * 269.88

20.86

9-5/8"

STC

269.88 * 196.85

18.03

LTC

269.88 * 266.70

25.45

BTC

269.88 * 269.88

23.16

10-3/4"

STC

298.45 * 203.20

20.78

BTC

298.45 * 269.88

25.74

11-3/4"

STC

323.85 * 203.20

22.64

BTC

323.85 * 269.88

28.03

13-3/8"

STC

365.12 * 203.20

25.66

BTC

365.12 * 269.88

31.77

16"

STC

431.80 * 228.6

34.91

BTC

431.80 * 269.88

40.28

18-5/8"

STC

508.00*228.60

51.01

BTC

508.00*269.88

62.68

20"

STC

533.40*228.6

43.42

LTC

533.4*292.10

57.04

BTC

533.40*269.88

50.10


API 5CT – Specification for Casing and Tubing 

Spec 5CT specifies the technical delivery conditions for steel pipes (casing, tubing, plain end casing liners, and pup joints) and accessories.

Applicable to the following connections in accordance

(1)short round thread casing (STC);

(2)long round thread casing (LC);
(3)buttress thread casing (BC);
(4)extreme-line casing (XC);
(5)non-upset tubing (NU);
(6)external upset tubing (EU);
(7)integral joint tubing (IJ).

This standard specifies the technical delivery conditions for steel pipes (casing, tubing, and pup joints), coupling stock, coupling material, and accessory material and establishes requirements for three Product Specification Levels (PSL-1, PSL-2, PSL-3). The requirements for PSL-1 are the basis of this standard. The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3, for all grades except H-40, L-80 9Cr, and C110, are contained in Annex H. This standard can also be applied to tubulars with connections not covered by API standards,Not applicable to threading requirements.

API 5B-Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads

API 5B is the standard specification for threading, gauging, and inspection of Casing, Tubing and line pipe threads.

Spec 5B covers dimensions and marking requirements for API Master thread gauges. Additional product threads and thread gauges, as well as instruments and methods for the inspection of threads for line pipe, round thread casing, buttress casing, and extreme-line casing connections, are included. It is applicable when so stipulated in the API standard governing the product. The inspection procedures for measurements of taper, lead, height, and angle of thread are applicable to threads having 111/2 or less turns per in. (111/2 or less turns per 25.4 mm). All thread dimensions shown without tolerances are related to the basis for connection design and are not subject to measurement to determine acceptance or rejection of product.

Chemical Composition(%)

GradeCMnMoCrNiCuPSSi
H40





≤0.03≤0.03
J55/K55





≤0.03≤0.03
N80-1/N80Q





≤0.03≤0.03
R95≤0.45ᶜ≤1.9



≤0.03≤0.03
L80≤0.43ᵃ≤1.9



≤0.03≤0.03
L80-1≤0.150.30~0.600.90~1.108.00~10.0≤0.03≤0.03≤0.45
L80-13Cr0.15~0.220.25~1.00
12.0~14.0≤0.25≤0.35≤0.03≤0.03≤0.45
C90≤0.35≤1.200.25ᵇ~0.85≤1.50≤0.5≤0.25≤0.02≤0.01≤1
T95≤0.35≤1.200.25ᵇ~0.850.40~1.50≤0.5≤0.25≤0.02≤0.01≤1
C110≤0.35≤1.200.25~1.000.40~0.15≤0.99≤0.02≤0.01
P110



≤0.99≤0.02≤0.01
Q125≤0.351.35≤0.85≤1.50≤0.99≤0.02≤0.005

Mechanical properties

GradeTotal elongation under load(%)Yield strength(Mpa)Tensile strength(Mpa)Hardness(HRC)Hardness(HBW)
H400.5276~552414
J550.5379~552517
K550.5379~552655
N80-1/N80Q0.5/0.5552~758/552~758689/689
R950.5655724
L800.555265523.0241
L80-1/L80-9Cr0.555265523.0241
L80-13Cr0.555265523.0241
C900.562168925.4255
T950.565572425.4255
C1100.775879330.0286
P1100.6758862
Q1250.65862931b


Coupling Pipe Grade Identification By Paint Color

    Coupling colour code
Grade Grade Type Colour(s) for Coupling Number andcolour of bandsfor product Picture
EntireCoupling Band(s)
H40
None Same as for pipe None/black band at the manufacturer’s option image
J55 Tubing
Bright Green None One Bright Green image
J55 Casing
Bright Green One White One Bright Green image
K55
Bright Green None Two Bright Green image
M65
M65Pipe uses L80Type 1Couplings One Bright GreenOne Blue image
N80 1 Red None One Red image
N80 Q Red One Green One RedOne Bright Green  image
R95
Brown None One Brown image
L80 1 Red One Brown One RedOne Brown image
L80 9Cr None Two Yellow One Red,One Brown,Two Yellow   image
L80 13Cr None One Yellow One Red,One Brown,One Yellow image
C90 1 Purple None One Purple  image
T95 1 Silver None One Silver image
C110
White Two Brown One White,Two Brown image
P110
White None One White image
Q125
Orange None One Orange   image


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