API Coupling refers to the steel couplings that used in connecting casing pipe and tubing. Also known by OCTG coupling, it is usually manufactured in seamless type, material grade same with the pipe body (API 5CT K55/J55, N80, L80, P110 etc), same PSL or providing higher grades than requested. Same heat treatment also applicable, except there isan special requirements.
Prithviraj Industries manufactures Unions that are available in a choice of end connections. API line pipe threads are standard. Butt weld ends and Socket weld ends can also be provided. The customer shall specify the schedule of pipe while ordering.
Sour Services
Product for Sour Services are available and all H2S service parts of unions manufactured by us conform to the latest NACE specifications.Unions for Low Temperature Service can be supplied with suitable impact value testing.
| Assembly Colour Key for Standard Service | Pressure Rating (psi) | Nominal Pipe Size (in mm.) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard Service | Sour Gas Service | 1 | 1 1/4 | 1 1/2 | 2 | 2 1/2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | ||||
| Cold Working | Test | Cold Working | Test | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | ||
| 50 | Red | 500 | 750 | NA | NA | ✔ | ✔ | ||||||||||
| 100 | Yellow | 1000 | 1500 | NA | NA | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||||||
| 200 | Gray | 2000 | 3000 | NA | NA | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||
| 206 | Gray | 2000 | 3000 | NA | NA | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||
| 207 | Blue/Gray | 2000 | 3000 | NA | NA | ✔ | ✔ | ✔ | |||||||||
| 211 | Blue | 2000 | 3000 | NA | NA | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||||||
| 400 | Red | 2500 | 3750 | 2500 | 3750 | ✔ | ✔ | ✔ | |||||||||
| 400 | Red | 4000 | 6000 | 4000 | 6000 | ✔ | ✔ | ✔ | ✔ | ||||||||
| 300 | Gray | 6000 | 9000 | NA | NA | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||||||
| 602 | Orange | 6000 | 9000 | 6000 | 9000 | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||||
| 1002 | Blue | 10000 | 15000 | 7500 | 12000 | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ||||
| 1003 | Green | 10000 | 15000 | 7500 | 12000 | ✔ | ✔ | ✔ | |||||||||
| 1502 | Red | 15000 | 22500 | 10000 | 10000 | ✔ | ✔ | ✔ | ✔ | ||||||||
| 2202 | Gray | 20000 | 30000 | NA | NA | ✔ | ✔ | ✔ | |||||||||
| 2202 | Green | NA | NA | 15000 | 22500 | ✔ | ✔ | ✔ | |||||||||
