IS 3972 : Part 2 : Sec 8 : 2024/ISO 4530 : 2022 Vitreous Enamelware - Part 2 Test Methods - Section 8 Resistance to Heat
NATIONAL FOREWORD
This Indian Standard (Part 2/Sec 8) (Second Revision) which is identical to ISO 4530 : 2022 'Vitreous and porcelain enamelled manufactured articles - Determination of resistance to heat' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Ceramicware Sectional Committee and approval of the Chemical Division Council.
This standard was first published in 1968. The committee, while reviewing IS 3972 : 1968 decided to publish this standard in two parts. Part 1 deals with production of specimens for testing. Part 2 deals with various test methods applicable to vitreous enamelled sheet steel and vitreous enamelled cast iron. The committee had also decided that Part 2 shall have various sections and each section will deal with a particular test method.
This standard (Part 2/Sec 8) prescribes the basic conditions concerning the method for determining the resistance of vitreous and porcelain enamelled articles to heat. The other sections of Part 2 are as follows:
Sec 2 Low and high voltage test for detection and locating defects
Sec 3 Resistance to boiling acids, boiling liquids, alkaline liquids and their vapours
Sec 4 Resistance to thermal shock
Sec 5 Resistance to hot alkali (sodium hydroxide)
Sec 6 Reflectance and specular gloss
Sec 9 Resistance to dilute sulphuric acid
Sec 11 Resistance to abrasion
Sec 12 Resistance to torsion
Sec 13 Resistance to warpage
Sec 14 Resistance to adherence
Section 1, Section 3 and Section 7 of this standard IS 3972 (Part 2) have been merged and published as IS 3972 (Part 2/Sec 3).
The first revision of this standard was published in 1990 which aligned the test method for determination of resistance to heat with ISO 4530 : 1983. Now, this revision has been taken up in order to align it with latest version of ISO 4530 : 2022.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions and terminologies 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'; and
b) Comma (,) has been used as a decimal marker in the International Standard, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.