IS 11239 : Part 4 : 2014/ISO 1663 : 2007 Method of Test for Rigid Cellular Thermal Insulation Materials Part 4 Water Vapour Transmission Rate

Reaffirmed 2019

NATIONAL FOREWORD

This Indian Standard ( Part 4 ) ( First Revision ) which is identical with ISO 1663 : 2007 ‘Rigid cellular plastics — Determination of water vapour transmission properties’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Thermal Insulation Sectional Committee and approval of the Chemical Division Council.

This standard was originally published in 1985. This revision of the standard has been taken up to align it with ISO 1663 : 2007 by adoption under dual numbering system.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.