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Title: Gas shielding apparatus

An apparatus for preventing oxidation by uniformly distributing inert shielding gas over the weld area of workpieces such as pipes being welded together. The apparatus comprises a chamber and a gas introduction element. The chamber has an annular top wall, an annular bottom wall, an inner side wall and an outer side wall connecting the top and bottom walls. One side wall is a screen and the other has a portion defining an orifice. The gas introduction element has a portion which encloses the orifice and can be one or more pipes. The gas introduction element is in fluid communication with the chamber and introduces inert shielding gas into the chamber. The inert gas leaves the chamber through the screen side wall and is dispersed evenly over the weld area.
Authors:
 [1]
  1. (Los Alamos, NM)
Publication Date:
OSTI Identifier:
865728
Report Number(s):
US 4562334
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
gas; shielding; apparatus; apparatus; preventing; oxidation; uniformly; distributing; inert; shielding; gas; weld; workpieces; pipes; welded; apparatus; comprises; chamber; gas; introduction; element; chamber; annular; top; wall; annular; bottom; wall; inner; wall; outer; wall; connecting; top; bottom; walls; wall; screen; portion; defining; orifice; gas; introduction; element; portion; encloses; orifice; pipes; gas; introduction; element; fluid; communication; chamber; introduces; inert; shielding; gas; chamber; inert; gas; leaves; chamber; screen; wall; dispersed; weld; bottom wall; bottom wall; portion defining; uniformly distributing; apparatus comprises; inert gas; fluid communication; top wall; apparatus comprise; shielding gas; shielding gas; shielding apparatus /219/