Thick welded steel pipe of large diameter and production thereof

Details Thick welded steel pipe of large diameter and production thereof Thick welded steel pipe of large diameter and production thereof

1980-02-25

1982-03-16

Truhe, J. V.

Electric heating

Metal heating

Of cylinders

219 73, B23K 3106, B23K 918

Patent

active

043202772

ABSTRACT:
Circular pipe of large diameter progressively formed of flat stock, the pipe having a single longitudinal seam is seam-welded by preparing welding grooves such that the inner groove is smaller in size and angle than the outer groove, sequentially carrying out submerged arc welding on the inner welding groove, and large current MIG welding to then first layer of the outer welding edge and a submerged arc welding to a second layer thereof.

REFERENCES:
patent: 4038514 (1977-07-01), Ashton
patent: 4071732 (1978-01-01), Tanaka et al.
patent: 4145594 (1979-03-01), Koshiga et al.
patent: 4186864 (1980-02-01), Ishimaru et al.
Metals Handbook, 8th Edition, vol. 6, "Welding and Brazing"; American Society for Metals, Ohio, 1971; pp. 148-151.

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