Method of manufacturing multilayer screw seam pipes and device f

Details Method of manufacturing multilayer screw seam pipes and device f Method of manufacturing multilayer screw seam pipes and device f

1984-08-10

1986-11-04

Albritton, Clarence L.

Electric heating

Metal heating

Of cylinders

219 616, B23K 3106, B23K 902

Patent

active

046211810

ABSTRACT:
An improved method of manufacturing multilayer helical seam pipes from strips or bands lying loosely over each other to prevent porous welding seams due to heated air escaping from resultant gaps between the layers of strips, comprising feeding the strips to a deformation station at an angle of entry corresponding to the pipe diameter, arc welding seams of the band edges with several arc welding heads, and arc welding a seam to the inside contact points of the area containing the band seams with another welding head to connect the adjacent bands.

REFERENCES:
patent: 3735478 (1973-05-01), Porter et al.
patent: 4247033 (1981-01-01), Dahmen et al.

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