FIELD: machine building.
SUBSTANCE: threaded joint for steel pipes comprises nipple and coupling, every of which has threaded section and non-threaded section of metal-to-metal contact, serving as contact surfaces. Contact surfaces of at least one element out of nipple and coupling are coated with multilayer structure containing, starting from the bottom, the first layer made of the first metal or alloy, the second layer made of the second metal or alloy, which is softer than the first metal or alloy, and solid lubricant coating as the highest layer, containing lubricating powder in organic or inorganic binder.
EFFECT: superb resistance to metal abrasion, capability of corrosion prevention and air impermeability without application of compound lubricant.
8 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| THREADED PIPE JOINT | 2006 |
|
RU2364781C1 |
| PIPE THREADED JOINT AND FORMING LUBRICATING COATING COMPOSITION FOR USE THEREIN | 2013 |
|
RU2604526C2 |
| THREADED JOINT FOR PIPES OR TUBES AND METHOD OF MAKING THREADED JOINT FOR PIPES OR TUBES | 2018 |
|
RU2729482C1 |
| THREADED CONNECTION FOR STEEL TUBES (VARIANTS) | 2002 |
|
RU2258859C2 |
| THREADED JOINT FOR STEEL PIPES | 2006 |
|
RU2349825C1 |
| LUBRICATING COMPOSITION FOR LUBRICATION OF THREADED CONNECTION | 2001 |
|
RU2246532C1 |
| THREADED JOINT FOR STEEL PIPE AND METHOD OF THREAD PRODUCTION | 2005 |
|
RU2326285C1 |
| SOLUTION FOR METALLIZATION OF THREADED CONNECTION OF PIPELINES OR PIPES AND METHOD OF PRODUCTION OF THREADED CONNECTION FOR PIPELINES OR PIPES | 2015 |
|
RU2658521C2 |
| THREADED JOINT FOR STEEL PIPES | 2002 |
|
RU2262029C2 |
| THREADED CONNECTION FOR PIPE AND METHOD FOR MANUFACTURING THREADED CONNECTION FOR PIPE | 2020 |
|
RU2802489C1 |
