Patent · US Expired

Method of welding tube ends onto a tube sheet

US4990206A · kind A · utility

7Cited by

7References

6Claims

0Family size

Assignee

Akzo N.V. · NL

Inventors

Friedrich Garske · Wuppertal, DE
Bernd Kraft · Steinheim, DE

Key dates

Filing date	Jul 13, 1988
Grant date	Feb 5, 1991
Priority date	—
Expiry date	Jul 13, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1089
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method of welding porous tube ends onto a tube sheet is disclosed, wherein tube ends projecting over the tube sheet are fused into a melt. Part of the melt is conducted to the outside in a radial direction, so that it lies on the end face of the tube sheet. Melt and tube sheet are then welded together. The tube end is preferably cooled from the inside by a metal pin is inserted into the tube end.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.