Process for compressing by hammering a steam generator tube set

Details Process for compressing by hammering a steam generator tube set Process for compressing by hammering a steam generator tube set

1985-11-06

1987-11-17

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29 90A, 29522R, 29523, B21C 3730, B24B 3900

Patent

active

047063564

ABSTRACT:
For the purpose of compressing by hammering a steam generator tube (1), a stream of gas at high velocity charged with particles having a particle size of between 50 and 500.10.sup.-6 m, is directed onto the inner surface of the tube (1) in radial directions and onto the whole of the periphery of the tube. The flow of the mass of the particles is higher than 0.008 kg/sec for tubes having an inside diameter of around 0.020 m. The device comprises a flexible sheath (20) movable inside a case (16, 18) fixed in a sealed manner under the tube plate (2) around the tube (1). An injection nozzle (21) is disposed at the end of the sheath (20) receiving the gas charged with particles.

REFERENCES:
patent: 2468984 (1949-05-01), Krieg et al.
patent: 3485073 (1969-12-01), Burney
patent: 3979810 (1976-09-01), Krips et al.
patent: 4069573 (1978-01-01), Regers, Jr. et al.
patent: 4258084 (1981-03-01), Hayden, Sr.
patent: 4581913 (1986-04-01), Reed

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