Title:
Pressure casting concrete or a steel pipe with mortar Liner, and its manufacturing method
Document Type and Number:
Japanese Patent JP5908881
Kind Code:
B2
Abstract:
Pressure cast lined steel pipes comprise an annular concrete or mortar liner along an inside diameter, and a metal shell surrounding the liner, wherein the liner is in direct contact with the metal shell. The wall thickness of the liner can be from 10 to 50 times the thickness of the metal shell. The pipe may be coated with a dielectric material. A mold assembly used to form the pipe includes an annular concrete or mortar composition chamber formed between the metal shell and an inner mold member. Pressurized water is used in the mold assembly to pressurize the concrete or mortar composition and exert a desired pressure force onto the metal shell while the composition cures in the mold. Once a desired degree of cure is achieved, the pressure is removed causing the metal shell to exert a desired compression force onto the cured liner.
Inventors:
Friedrich, Ralph S.
Shen Ji Chong
Kubat, Paul
Shen Ji Chong
Kubat, Paul
Application Number:
JP2013236153A
Publication Date:
April 26, 2016
Filing Date:
November 14, 2013
Export Citation:
Assignee:
Ameron International
International Classes:
B28B21/58; B28B21/20; B28B21/76
Domestic Patent References:
| JP55135611A | ||||
| JP32002689B1 | ||||
| JP55044851A | ||||
| JP54053129A | ||||
| JP40014310B1 |
Foreign References:
| US2709845 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Yoryo Mihashi
Yasushi Ohashi
Jun Tsuruta
Tetsuro Shimada
Yoryo Mihashi
Yasushi Ohashi
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