GB/T 25996-2019: Test method for thermal insulations on external stress corrosion cracking of austenitic stainless steel

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Scope

1.1 This Standard specifies the terms and definitions, instruments and
equipment, reagents and materials, preparation of stainless steel specimens,
preparation of thermal insulation specimens, test methods, qualification
verification of sensitized stainless steel specimens for test, inspection of
stainless steel specimens after test, test results, test report of test method for
thermal insulations on external stress corrosion cracking of austenitic stainless
steel.
1.2 This Standard applies to thermal insulations and products for covering
austenitic stainless steel, which mainly include mineral wool, calcium silicate,
composite silicate, expanded perlite, foamed asbestos, foam glass, aerogel,
and thermal insulation fireproof coatings. It also applies to cement and
adhesives.
1.3 This Standard provides two test methods, i.e. Dana method and drip
method. The applicability is as follows:
- Dana method applies only to wicking-type insulations; drip method applies
to all insulations that can be cut or shaped into test specimens;
- When the insulation can be heat treated into a wicking-type insulation, it
can be tested by either Dana method or drip method;
- When the insulation cannot be treated into a wicking-type insulation or the
heat treatment temperature is higher than the manufacturer's
recommended temperature, use drip method for test.

Basic Data

Standard ID	GB/T 25996-2019 (GB/T25996-2019)
Description (Translated English)	Test method for thermal insulations on external stress corrosion cracking of austenitic stainless steel
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Q25
Classification of International Standard	91.120.10
Word Count Estimation	10,182
Date of Issue	2019-10-18
Date of Implementation	2020-09-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration