Stainless steel composite pipe welding method


Application Number  00129337 Application Date  2000.11.22
Publication Number  1354061 Publication Date  2002.06.19
Priority Information    
International
Classification
 B23K9/02;B23K31/00  
Applicant(s) Name  First Company of Industrial Equipment Installation Company, China Constructional  
Address    
Inventor(s) Name  Bai Tianhai;Lu Ruilian;Zhang Heng  
Patent Agency Code  00000 Patent Agent  
AbstractThe present invention relates to a welding method of composite pipe, and is characterized by that for stainless steel composite layer it adopts argon arc welding process, the welding thickness is equal to the thickness of stainless steel composite layer material; between the stainless steel composite layer and carbon steel base layer, transition layer electrowelding process is adopted then for carbon steel base layer, electrowelding process is adopted. Said invented welding method raises welding quality, and can make welding one-time radial test up-to-standard rate be raised to above 97% from about 40%.