FIELD: welding.
SUBSTANCE: invention relates to a device for protecting the inside of a weld. The inner shell of the device is made of stainless steel with a thickness of at least 2 mm and is fixed in the outer shell of carbon steel so that its ends protrude beyond the ends of the outer shell. A sealing element is installed on each side of the outer shell around the entire perimeter, made with the possibility of increasing its volume upon contact with liquid to form a tight overlap, limiting the access of the transported medium to the inside of the weld. On the outer surface of the outer shell, centering stops are installed to ensure self-centering of the device in the pipe during its installation. The inner shell is fixed in the outer shell by plastic deformation with fixation by electric arc welding with tacks not less than 10 mm long, in the amount of at least four on each side of the shell.
EFFECT: design of the device provides high reliability of pipeline weld protection.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PIPE WELD WITH INTERNAL COATING | 2014 |
|
RU2570298C2 |
| CORROSION-RESISTANT BUSHING FOR INTERNAL PROTECTION OF PIPELINES | 2021 |
|
RU2767123C1 |
| CORROSION-RESISTANT BUSHING FOR INTERNAL PROTECTION OF PIPELINES | 2022 |
|
RU2776607C1 |
| CHUIKO'S PROCESS OF ANTIRUST PROTECTION OF PIPE WELDS WITH INNER PROTECTIVE COATING | 2013 |
|
RU2552627C2 |
| WELDED JOINT OF PIPES WITH INNER COATING | 2013 |
|
RU2518992C1 |
| METHOD TO BUILD PIPELINE FROM PIPES WITH INTERNAL COATING | 2013 |
|
RU2526408C1 |
| PROTECTION OF PIPE WELD WITH INTERNAL PROTECTIVE COATING AGAINST CORROSION | 2013 |
|
RU2533046C2 |
| METHOD OF WELDING PIPELINES WITH INTERNAL ANTICORROSION COATING | 2019 |
|
RU2722582C1 |
| DEVICE FOR PROTECTING INNER WELDED PIPELINE JOINT | 2016 |
|
RU2620473C1 |
| PIPE WELD WITH INTERNAL COATING | 2013 |
|
RU2532473C2 |
