| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piping material for construction, treated in itself with fire-proofing measurement and having excellent workability. <P>SOLUTION: The piping material for construction satisfies a relation of (S2/S1)×100≤50, when applying the piping material to a floor material to pass through and performing fire proofing test by heating from under-floor on the condition that one end part of the piping material is exposed by 300 mm from the heating side surface to the heating side and the other end part of the piping material is exposed by 800 mm from the non-heating side surface to the non-heating side (according to ISO 834-1 of the evaluation test method of pipes passing through a fire protection section or the like, based on the revised Building Standard Law enforced on 1st June 2000), wherein S1 is the cross-section of the inside of the pipe at the heating side end part of the piping material before combustion and S2 is the cross-section of the inside of the pipe at the minimum inner diameter part of the piping material after combustion. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
