Pressure vessel joint

US4138030A · kind A · utility

Assignee

• Aktiebolaget Atomenergi

Inventor

• Gustav Andersson · Stockholm, SE

Key dates

• Filing date: Mar 10, 1978
• Grant date: Feb 6, 1979
• Expiry date: Mar 10, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J13/06
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

There is provided a joint between a pressure vessel lid and a pressure vessel. The vessel is intended for very high pressures and of the type comprising a thinwalled container which is supported by an external rigid support structure, such that the container provides the vessel tightness and the structure provides the vessel strength. The lid is clamped onto a container rim by means of screws via blocks. An annular shoulder is fixed to the support structure above the container rim. There is an axial play between the blocks and the shoulder. This play is adapted to be eliminated for a relatively low container pressurization at which the yield limit of the container material is reached. The screws merely have to provide the clamping force required to ensure the vessel tightness until the blocks abut the shoulder, whereafter a further container pressurization provides the necessary lid clamping force.