Pipe weld repair device and method for the installation thereof
US4709729A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1986 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | Jan 21, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/172
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe weld repair structure adapted to seal leaks or cracks at a weld circumferentially disposed in a pipe. Includes at least two pipe clamp segments disposed around the pipe and connected together to form complete clamp. Each clamp segment defines two inner surfaces adapted to be in contact with outer surface of pipe when clamps are connected together around pipe. Each clamp segment defines an inner grooved recess disposed between inner surfaces and adapted to enclose a weld circumferentially disposed around pipe when clamps are connected together around pipe. Clamp segments define an internal diameter when clamp segments are connected to form complete clamp. Internal diameter is conventional fit around pipe while clamp segments are at sufficiently high temperature to cause thermal expansion. Internal diameter is a shrink fit around the surfaces of pipe after clamp segments are connected together while at sufficiently high temperature and subsequently allowed to cool to same temperature as pipe. Bolted flanges are adapted to connect clamp segments together in sealed relationship to form complete clamp and to retain shrink fit of clamp around pipe. Ports provided in clamp segments…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.