Apparatus for coating exterior weld joints of a pipe
US5352292A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1993 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Jan 4, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An external pipe covering apparatus is provided for coating exterior surfaces of uncoated longitudinal, helical and girth weld joints of a pipe to provide protection against corrosion, to minimize the weld projection by filling in any voids on either side of a weld, and to further provide a uniform smooth surface for a later applied tape. The apparatus is moved along a pipe by a crane or similar mechanical device. The apparatus has a carriage to which is attached wheels, a reservoir attached to the upper frame of the carriage for holding liquid resin, a circular member having at least one sensor therein attached to the lower frame of the carriage, a microprocessor attached to the upper frame of the carriage, a circular dispenser for dispensing liquid resin having at least one nozzle and at least one solenoid valve attached to the lower frame of the carriage for dispensing resin from the reservoir, and a pump for delivery of liquid resin to the nozzle. In operation, a sensor or sensors send electrical signals to a microprocessor, which then sends an electrical signal or signals, depending on the type of weld joint sensed, simultaneously to a corresponding solenoid valve or valves an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.