Title:
PIPING METHOD AND PIPING MATERIAL USED IN THIS METHOD
Document Type and Number:
Japanese Patent JP3042928
Kind Code:
B2
Abstract:
PURPOSE: To contrive substantial reduction of labor, time and expense in the case of arranging a gas flow pipe or the like in a piping groove.
CONSTITUTION: A protecting pipe 2 is arranged outside an inner pipe 1, to form a filler layer 3 between these pipes and also to insert a deodorant pipe 14 and a cable protecting pipe 5 to the filler layer 3, and the fellow inner pipes 1 are welded to perform back filling by covering the outside of a connecting part of the protecting pipe 2 with a protecting cover 7. Since a piping material itself is formed of a double pipe structure built with the deodorant pipe 4 and the protecting pipe 5, necessity for laying the deodorant pipe and the cable protecting pipe and further covering a protecting iron plate thereon at piping time is eliminated, and also eliminating necessity for spreading gravel at back filling time, so that labor, time and expense for piping can be substantially reduced.
Inventors:
Mitsutoshi Hayashi
Akitaka Fujita
Shingo Nagashima
Akitaka Fujita
Shingo Nagashima
Application Number:
JP8182992A
Publication Date:
May 22, 2000
Filing Date:
April 03, 1992
Export Citation:
Assignee:
Tokyo Gas Co., Ltd.
International Classes:
E03C1/00; F16L1/024; F16L9/18; H02G9/06; (IPC1-7): F16L9/18
Domestic Patent References:
| JP4210183A | ||||
| JP60175812A | ||||
| JP5439922B1 |
Attorney, Agent or Firm:
Hiroshi Ohashi