China high quality API 5CT Oilfield External Upset Eue Tubing Coupling coupling contractions

Product Description

Product Description

API 5CT Oilfield External Upset Eue Tubing Coupling

1) Material: Carbon steel, Stainless steel, Alloy
2) Connection: NUE, EUE for tubing coupling
3) Standard: API 5CT
4) API and ISO certified
5) Grade:  J-55, C-75, L-80, N-80, C-95, P-110

6) Application
Couplings are short lengths of pipe used to connect 2 joints of tubing or casing. Tubing Coupling can be widely used in cold and hot water supply, heating supply, fire protection, medicinal gas, industrial petroleum pipeline system etc. It has already replaced welding fittings in most Europe countries, Asia countries, America, Australia and some other countries.
7) Parameter

Descriptions and size Type of Therad O.D*L Weight
(mm) (kg)
Tubing Coupling 1.05 NUE 33.35*80.96 0.23
1.05 EUE 42.16*82.55 0.38
1.315 NUE 42.16*82.55 0.38
1.315 EUE 48.26*88.90 0.57
1.66 NUE 52.17*88.90 0.59
1.66 EUE 58.88*95.25 0.68
1.9 NUE 55.88*95.25 0.56
1.9 EUE 63.50*98.42 0.84
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
Casing Coupling 4-1/2″ STC 127.00*158.75 5.23
4-1/2″ LTC 127.00*177.80 4.15
4-1/2″ BTC 127.00*225.42 4.55
5″ STC 141.30*165.10 4.66
5″ LTC 141.30*196.85 5.75
5″ BTC 141.30*231.78 5.85
5-1/2″ STC 153.67*171.45 5.23
5-1/2″ LTC 153.67*203.20 6.42
5-1/2″ BTC 153.67*234.95 6.36
6-5/8″ STC 187.71*184.15 9.12
6-5/8″ LTC 187.71*222.25 11.34
6-5/8″ BTC 187.71*244.48 11.01
7″ STC 194.46*184.15 8.39
7″ LTC 194.46*228.60 10.83
7″ BTC 194.46*254.00 10.54
7-5/8″ STC 215.90*190.50 12.3
7-5/8″ LTC 215.90*234.95 15.63
7-5/8″ BTC 215.90*263.52 15.82
8-5/8″ STC 244.48*196.85 16.23
8-5/8″ LTC 244.48*254.00 21.67
8-5/8″ BTC 244.48*269.88 20.86
9-5/8″ STC 269.88*196.85 18.03
9-5/8″ LTC 269.88*266.70 25.45
9-5/8″ BTC 269.88*269.88 23.16
10-3/4″ STC 298.45*203.20 20.78
10-3/4″ BTC 298.45*269.88 25.74
11-3/4′ STC 323.85*203.20 22.64
11-3/4′ BTC 323.85*269.88 28.03
13-3/8″ STC 365.12*203.20 25.66
13-3/8″ BTC 365.12*269.88 31.77
16″ STC 431.80*228.6 34.91
16″ BTC 431.80*269.88 40.28
18-5/8″ STC 508.00*228.60 51.01
18-5/8″ BTC 508.00*269.88 62.68
20″ STC 533.40*228.6 43.42
20″ LTC 533.4*292.10 57.04
20″ BTC 533.40*269.88 50.1

8) Package

9) Certificates

Company Information

HangZhou CZPT Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. 
We have the certificates of API 5CT, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001, etc..  
Our  products mainly include: 
1. Casing Centralizer                          
2.  Float Collar & Float Shoe 
3. Cementing Plug                              
4.  Cementing Head
5.  Cement Basket                              
6.  Tubing Pump / Rod Pump
7.  Valve Ball & seat                            
8. Casing / Tubing Pipe and Coupling
9. Stage Collar                                    
10. Pumping Unit
11. Sucker Rod

Our group have more than 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC.  Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.

Contact Us


Add: 5th community, Xihu (West Lake) Dis. Oilfield, HangZhou, China



Website: zschinaHangZhoue ;

Irene is here waiting for you!!

Certification: API 5CT
Thread Connection: Nue, Eue
Material: Carbon Steel, Stainless Steel, Alloy
Grade: J-55, C-75, L-80, N-80, C-95, P-110
Transport Package: Stack on Plywood Pallet
Specification: API, ISO
US$ 9/Piece
1 Piece(Min.Order)

Request Sample



Customized Request


Programming With Couplings

A coupling is a mechanical device that connects two shafts together and transmits power. Its purpose is to join rotating equipment and allows some degree of end-movement or misalignment. There are many different types of couplings. It’s important to choose the right one for your application.

Mechanical connection between two shafts

There are many ways to achieve mechanical connection between two shafts, including the use of a coupling. One common type is the beam coupling, which is also known as a helical coupling. It is used for transmission of torque between two shafts. This type of connection accommodates axial, parallel and angular misalignments.
The hubs and shafts of a worm gear are connected together by a coupling. This mechanical connection allows one shaft to turn another without causing a mechanical failure. This type of coupling is made from sliding or rubbing parts to transfer torque. However, the coupling is not designed to withstand jerks, so it isn’t suitable for high-speed applications.
The use of a coupling is common in machinery and equipment. It helps transmit power from one drive shaft to the other, while adding mechanical flexibility. It is also useful for reducing the impact and vibration caused by misalignment. It also protects the drive shaft components from wear and tear.
A double-hook coupling can be used to provide a uniform angular velocity at the driven shaft. Another example is a double-jointed coupling. A double-jointed coupling can be used to connect shafts that are not directly intersecting. The double-jointed yoke can be used for the same purpose.
A shaft coupling is a device that maintains a strong mechanical connection between two shafts. It transfers motion from one shaft to another, at all loads and misalignments. Unlike a conventional linkage, a shaft coupling isn’t designed to allow relative motion between the two shafts. Couplings often serve several purposes in a machine, but their primary use is torque and power transmission.

Functions that control the flow of another function

One of the simplest programming constructs is a function that controls the flow of another function. A function can take an argument and return a different value, but it must be ready to return before it can pass that value to another function. To do this, you can use the goto statement and the if statement. Another way to control flow is to use a conditional statement.

Criteria for selecting a coupling

There are several important factors to consider when choosing the right coupling. One of the most important factors is coupling stiffness, which depends on the material used and the shape. The stiffness of a coupling determines its ability to resist elastic deformation. A stiff coupling is desirable for certain types of applications, but it’s undesirable for others. Stiffness can reduce the performance of a system if there’s too much inertia. To avoid this, ensure that the coupling you choose is within the recommended limits.
The size of a coupling is also important. Different coupling types can accommodate different shaft sizes and shapes. Some couplings have special features, such as braking and shear pin protection. When choosing a coupling, you should also consider the type of driven equipment. If you need to connect a high-torque motor, for example, you’ll want to choose a gear coupling. Likewise, a high-speed machine may require a disc coupling.
Another factor to consider when selecting a coupling is the torque rating. Despite its importance, it’s often underestimated. The torque rating is defined as the torque of the coupling divided by its OD. In some cases, torque may fluctuate during a cycle, requiring a coupling with a higher torque rating.
Torsionally flexible couplings are also important to consider. Their design should be able to withstand the torque required during operation, as well as the required speed. The coupling should also have a high degree of torsional stiffness, as well as damping. Furthermore, a damping coupling can reduce the energy wasted through vibration.
The sizing of a coupling is also determined by the torque. Many engineers use torque to select the correct coupling size, but they also take into consideration torsional flexibility and torsional stiffness. For example, a shaft may be able to handle large torque without damaging the coupling, while a disk may be unable to handle large amounts of torque.
Besides torque, another important consideration in coupling selection is the cost. While a coupling may be cheaper, it may be less reliable or easier to maintain. Couplings that are difficult to service may not last as long. They may also require frequent maintenance. If that’s the case, consider purchasing a coupling with a low service factor.
There are many different types of couplings. Some require additional lubrication throughout their lifetime, while others are 100% lubrication-free. An example of a 100% lubrication-free coupling is the RBI flexible coupling from CZPT. This type of coupling can significantly reduce your total cost of ownership.
In addition to the above-mentioned benefits, elastomeric couplings are low-cost and need little maintenance. While they are often cheaper than metallic couplings, they also have excellent shock absorption and vibration dampening properties. However, they are susceptible to high temperatures. Also, they are difficult to balance as an assembly, and have limited overload torque capacity.
China high quality API 5CT Oilfield External Upset Eue Tubing Coupling   coupling contractionsChina high quality API 5CT Oilfield External Upset Eue Tubing Coupling   coupling contractions
editor by CX 2023-04-22

Spline Coupling

As one of spline coupling manufacturers, suppliers and exporters of mechanical products, We offer spline coupling and many other products.

Please contact us for details.

Mail:[email protected]

Manufacturer supplier exporter of spline coupling.


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