IS 3400 : Part 19 : 2020/ISO 2782-1 : 2016 Methods of Test for Vulcanized Rubbers - Part 19 Permeability to Gases ( Constant Volume Method )

ICS 83.060 PCD 29

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 19) (First Revision) which is identical with ‘ISO 2782-1 : 2016 ‘Rubber, vulcanized or thermoplastic — Determination of permeability to gases — Part 1: Differential-pressure methods’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards after on recommendations of the Methods of Test for Rubber and Rubber Products Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.

The measurement of permeability of rubber to gases is important in the evaluation of rubbers for such products as inner tubes, tubeless tyre liners, hoses, balloons or other gas containers, seals or membranes. The measurement is also of theoretical importance in the study of characteristics of diffusion and gas solubility in relation to polymer structure. Because of dangers connected with high pressure and flammability handling of gases should be done by experienced personnel only.

This Indian Standard was originally published in 1976 which was based on ISO/R 1399-1970 ‘Determination of the productivity of vulcanized rubbers to gases (constant volume method)’ published by International Organization for Standardization. ISO 1399 was revised by ISO 2782 which was then split in to two parts. The first revision of this standard has been undertaken to align it with the latest version of ISO 2782-1 : 2016. While ISO 2782-2 is being adopted as IS 3400 (Part 21).

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and 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.