| After-sales Service: | Yes |
|---|---|
| Warranty: | 1 Year |
| Manufacturing Process: | Casting |
| Surface Treatment: | Galvanized |
| Operation Pressure: | Atmospheric Pressure |
| Material: | Alloy |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier Couplings are short lengths of pipe used to connect two joints of tubing or casing pipes, which are painted with color codes on their external surface to indicate their grades. We manufacture casing and tubing couplings for many years. All sizes are available.
Tubing Coupling can be widely used in industrial petroleum pipeline system, cold and hot water supply, heating supply, fire protection, medicinal gas, etc. It has already replaced welding fittings in most countries
All the casing and tubing casings are made of top quality coupling stock from pre-qualified seamless pipe mills. High-speed CNC lathes ensure the preciseness of the finished couplings. And the couplings should be manufactured according to API 5CT and 5B standards.
| Size | Type of Thread | O.D*L (mm) | Weight (kg) |
| 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 |
| Specification | size (mm) | O.D (mm) | Thread Type | Min Length (mm) | Steel Grade |
| 4 1/2 | 114.3 | 127.00 | STC, LTC,BTC | 158.75 | J55,N80,P110 |
| 5 | 127 | 141.30 | STC, LTC,BTC | 165.10 | J55,N80,P110 |
| 5 1/2 | 139.7 | 153.67 | STC, LTC,BTC | 171.45 | J55,N80,P110 |
| 6 5/8 | 168.28 | 187.71 | STC, LTC,BTC | 184.15 | J55,N80,P110 |
| 7 | 177.8 | 194.46 | STC, LTC,BTC | 184.15 | J55,N80,P110 |
| 7 5/8 | 193.7 | 215.90 | STC, LTC,BTC | 190.50 | J55,N80,P110 |
| 8 5/8 | 219.08 | 244.48 | STC, LTC,BTC | 196.85 | J55,N80,P110 |
| 9 5/8 | 244.48 | 269.88 | STC, LTC,BTC | 196.85 | J55,N80,P110 |
| 10 3/4 | 273.05 | 298.45 | STC, LTC,BTC | 203.20 | J55,N80,P110 |
| 11 3/4 | 298.45 | 323.85 | STC, LTC,BTC | 203.20 | J55,N80,P110 |
| 13 3/8 | 339.72 | 365.12 | STC, LTC,BTC | 203.20 | J55,N80,P110 |
| 16 | 406.40 | 431.80 | STC, LTC,BTC | 228.60 | J55,N80,P110 |
| 18 5/8 | 473.08 | 508.00 | STC, LTC,BTC | 228.60 | J55,N80,P110 |
| 20 | 508.00 | 533.40 | STC, LTC,BTC | 228.60 | J55,N80,P110 |
Suppliers with verified business licenses
Audited Supplier 
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