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Title:
REFRACTORY DOUBLE TUBE AT THROUGH-PART IN FIRE CONTROL AREA
Document Type and Number:
Japanese Patent JP2004036721
Kind Code:
A
Abstract:

To provide a refractory double layer tube capable of preventing smoke from leaking while reducing a weight.

This refractory double layer tube 13 comprises a vinyl chloride tube 17 disposed in the through-hole 15 of a concrete slab 11 and used as a synthetic resin inner tube and a refractory mortar tube 19 covered on the outer periphery of the vinyl chloride tube and formed integrally airtight with the vinyl chloride tube.The covered length L [mm] of the refractory mortar tube is set to be 100 [mm] + inner diameter d [mm] of vinyl chloride tube x 2 ≤ L ≤ 2100 [mm].


Inventors:
ISHIMOTO SADAO
KAMIKAWA KAZUMA
FURUKAWA MASAHIRO
Application Number:
JP2002193193A
Publication Date:
February 05, 2004
Filing Date:
July 02, 2002
Export Citation:
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Assignee:
A & A MATERIAL CORP
International Classes:
F16L59/147; B32B1/08; B32B13/12; F16L5/04; F16L9/14; (IPC1-7): F16L5/04; B32B1/08; B32B13/12; F16L9/14; F16L59/147
Attorney, Agent or Firm:
Michiteru Soga
Michiharu Soga
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Taizo Shiraishi
Yoshikazu Takei



 
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