Application：Used for connect 2 joints of tubing or casing
Size：Tubing Coupling：1 8/9" — 4-1/2"
Casing Couping：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 Phaphating or inside phasphating and outside coating
Thread：NUE，EUE，VAM，STC，LTC，BTC，XC，VAM TOP，NEW VAM，HYDRILL CS
Special Service：Sweet Service，Sour Service，Anti-H2S，NACE MR0175/ISO15156
Packing：By carton，wooden case，wooden pallet or requirement of customer
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 | 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 | OD&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 | 6.38 |
| 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*228.60 | 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*228.60 | 43.42 |
| LTC | 533.40*292.10 | 57.04 |
| BTC | 533.40*269.88 | 50.10 |
