Process for thermal treatment of tubes

Details Process for thermal treatment of tubes Process for thermal treatment of tubes

1979-02-09

1981-02-24

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148 36, 148 37, C21D 908

Patent

active

042525780

ABSTRACT:
Elongated steel tubes are grouped together and bound into bundles with bing sufficiently tight that there is no clearance or play between the tubes during heat treatment. Such binding provides a rigid mechanical assembly which prevents any lateral deformation of the tubes with respect to each other. Heat treatment is carried out while the tubes are tightly bound in bundles, and each bundle is supported in the furnace at least at several locations along its length to prevent deformation. The bundles are preferably of hexagon shape in section but can be of other geometric shapes. This technique results in heat treated tubes which are perfectly straight.

REFERENCES:
patent: 1570815 (1926-01-01), Wylie
patent: 1727192 (1929-09-01), Baily
patent: 2066515 (1937-01-01), Bishop

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