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Product Description--API 5CT Oil Casing Coupling
Casing couplings are short lengths of pipes applied to connect two joints of casing. They are painted different color codes on their external surface to indicate their grades. Casing coupling and tubing coupling are manufactured according to API 5CT and 5B specifications.
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Product pictures and application
9-5/8"BTC P110 Coupling
9-5/8" LTC K55 Coupling
Coupling application
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Product parameter
API Casing Coupling |
Descriptions and size (mm/in) | Type of Thread | O.D*Length (mm/in) | Weight (kg/lb) |
4-1/2"~20" (API 5CT C.32, C.33- E.32, E.33) | Conform to API 5CT C.32, C.33 - E.32, E.33 |
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Product surface treatment
Whole phosphating, or inside phosphating and outside coating.
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API coupling specification
Coupling shall be seamless, be of the same grade and type and the same PSL, or higher, as the pipe and be given the same heat treatment as the pipe.
Coupling should be machined from coupling blanks made from coupling stock, coupling material or hot forgings except Grade C110 and Q125 coupling which shall not be made from hot forgings.
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Production package and transportation
By carton, wooden case, wooden pallet, or as customer's requirements.
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Production process
1. Procurement of coupling materials
2. Inspection of coupling materials
3. Sawing
4. OD turning
5. Boring holes
6. Threading
7. Thread detection
8.Coupling inspection (magnetic particle inspection)
9. Marking
10. Painting
11. Stenciling
12. Packaging
13. Loading
| Coupling stock
Seamless thick walled pipes or mechanical pipes used in the production of coupling blank.
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