The standard for couplings on tubing is to implement API5CT and API 5B standards. API5CT includes the dimensions of tubing and casing couplings, physical and chemical properties of steel grade, P110S anti-sulfur tubing couplings, and the parameters of coupling threads in API5B. . The coupling of the coupling is almost controlled according to the withholding torque, and there is also a control according to the value of J. The coupling is threaded, but the specified torque must be reached. The coupling of the ladder-type threaded sleeve must be screwed to the triangle symbol. The bottom edge.
| API Tubing Coupling | ||||
| Descriptions and size | Type of Thread | O.D*L (mm) | Weight (kg) | |
| Tubing Coupling | 1.050 | NUE | 33.35*80.96 | 0.23 |
| 1.050 | 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 | |
| 1.660 | NUE | 52.17*88.90 | 0.59 | |
| 1.660 | EUE | 58.88*95.25 | 0.68 | |
| 1.900 | NUE | 55.88*95.25 | 0.56 | |
| 1.900 | 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 | 2.40 | |
| 3-1/2" | NUE | 107.95*142.88 | 3.71 | |
| 3-1/2" | EUE | 114.30*146.05 | 4.10 | |
| 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 | |
 N80 coupling |  J55 coupling |
Corrosion-resistant petroleum casing spot
2-3 / 8 '* 4.83 light tube L80-13CR 2.6 tons
2-7 / 8 '* 5.51 L80-13CR 20 tons
3-1 / 2 '* 6.45 BGT1 110-13CR 7.5 tons
139 * 7.72 light tube L80-13CR 33 tons,
139.7 * 9.17 light tube BG110-3CR 6 tons
168.3 * 10.59 BTC L80-13CR 15 tons,
177.8 * 10.36 light tube L80-13CR 2.3 tons
194 * 10.92 casing L80-13CR 4 tons
Our Services/Warranty
As a professional manufacturer, we provide follow services:
1.Lower price
2.ONE year warranty and life time maintenance
3.In time delivery.
4.High Quality assurance
Latest news
We have lots of couplings and couplings stock for sales,such as 2-3/8”;2-7/8”,3-1/2” standard size and casing couplings such as 13-3/8” K55 BTC etc.
Our company manufacture and sell oil casing pipe,tubing pipe,casing and tubing couplings,pup joints, crossover, premium connection, 13cr pipes, steel pipe
