Apparatus for preheating the ends of upset steel pipes

Details Apparatus for preheating the ends of upset steel pipes Apparatus for preheating the ends of upset steel pipes

1982-07-16

1984-10-16

Albritton, C. L.

Electric heating

Metal heating

Of cylinders

219 1073, 219 1075, H05B 640

Patent

active

044777086

ABSTRACT:
Both thickened end portions of predetermined lengths of an upset steel pipe are preheated simultaneously, in advance of heat treatment of the pipe, in an apparatus provided with means for raising or lowering the stationarily supported upset steel pipe and with a pair of induction heaters for simultaneously heating both end portions of the upset steel pipe in the raised position of the pipe, said pair of induction heaters being set in advance to a relative spacing corresponding to the length of said steel pipe, and reciprocated with strokes corresponding to the lengths of the thickened end portions. The support means for raising and lowering the pipe comprise a plurality of units which may be raised and lowered separately and selectively.

REFERENCES:
patent: 3505492 (1970-04-01), Ross
patent: 3553414 (1971-01-01), McArthur
patent: 4158758 (1979-01-01), Kunioka et al.
patent: 4258241 (1981-03-01), Soworowski

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