Published October 5, 1979
| Version v1
Patent
Process and installation of fabrication of pipe holding rings in very thick wall
Description
This invention has a use in metallurgy, particularly in the making of components forming part of pipe holding rings for nuclear reactors. An orifice, centred on the axis of the pipe to be obtained, is made in the wall of a pressure vessel more than 100 mm thick. The plate is heated in the area around the orifice to a temperature between that corresponding to the A3 transformation point and that corresponding to the forging temperature. A circular mono-dimensional pull is applied at the orifice area with hollowing, after which the ensemble achieved is given a set, without compressing it, so as to impart a definitive shape to it
Availability note (English)
Available from Institut National de la Propriete Industrielle, Paris (France).Abstract (French)
L'invention trouve son utilisation dans le domaine de la metallurgie, et plus particulierement dans la confection d'elements constitutifs de virole porte-tubulure pour reacteurs nucleaires. On realise dans la paroi d'une enceinte sous pression, d'epaisseur superieure a 100 mm, un orifice centre sur l'axe de la tubulure a obtenir, on chauffe la tole sur la partie entourant l'orifice a une temperature comprise entre celle correspondant au point de transformation A3 et celle correspondant a la temperature de forge, on exerce a l'endroit de l'orifice une traction circulaire monodimensionnelle avec enfoncement, puis on deforme l'ensemble obtenu, sans le comprimer, de maniere a lui conferer sa forme definitiveAdditional details
Additional titles
- Original title (French)
- Procede et installation de fabrication d'une tubulure d'attente sur une paroi de tres forte epaisseur
- Augmented title (English)
- pressure vessel
Publishing Information
- Imprint Pagination
- 7 p.
- IPC:
- Int. Cl. B21d39/04; F16l41/08; G21c15/02.
- IPC
- Int. Cl. B21d39/04; F16l41/08; G21c15/02.
- Patent number
- FR patent document 2419120/E/
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 11538452
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- ORIFICES; PIPE FITTINGS; PRESSURE VESSELS; SPECIFICATIONS; SWAGING
- Descriptors DEC
- CONTAINERS; FABRICATION; MATERIALS WORKING; OPENINGS
Optional Information
- Notes
- Addition to the French patent document 76.00471.