What is ISO 20088-2- Vapour exposure to test insulating materials for cryogenic spill resistance about?
ISO 20088-2 describes a method for determining the resistance of Cryogenic Spill Protection (CSP) systems to vapour generated from a cryogenic liquid release where the liquid content is practically zero.
ISO 20088-2 is applicable where CSP systems are installed on carbon steel.
NOTE: The test provided in ISO 20088-2 is not applicable to high pressure cryogenic liquid releases that can be found in refrigeration circuits and in LNG streams immediately post-liquefaction.
Who is ISO 20088-2-Vapour exposure to test insulating materials for cryogenic spill resistance for?
ISO 20088-2 on vapour exposure is beneficial for:
- Testing authorities
- Chemical engineers
- Fire protection team
- Corrosion engineers
- Cryogenic engineers
Why should you use ISO 20088-2-Vapour exposure to test insulating materials for cryogenic spill resistance?
Liquid jet release may be formed upon release of Liquified Natural Gas (LNG) from process equipment operating at pressure, e.g., some liquefaction processes utilise 40 - 60 bar operating pressure. However, at specific distances from the release point, it is expected that the liquid fraction will diminish such that there is practically no effect from liquid cooling in the stream.
The dimensions of the test specimen might be smaller than typical items of structure and plant. The liquid cryogenic jet mass flow rates can be substantially less than that which might occur in a credible event. However, individual thermal loads imparted to the cryogenic spill protection materials, from the cryogenic release defined in the procedure described in ISO 20088-2, have been shown to be representative of areas exposed to a cryogenic LNG accidental release where little or no liquid is present.
The test is intended to be, as far as practicable, representative of a potential accidental pressurized release of cryogenic LNG material manufactured in industrial plants. The test includes:
- Release from of cryogenic liquid under pressure
- Scenarios where the conditions in the jet characterized predominantly by gaseous exposure
Overall, ISO 20088-2 is helpful because it describes about the test which is designed to give an indication of how cryogenic spill protection materials will perform in a sudden exposure to cryogenic jet where it is expected that little or no liquid fraction is present. The main purpose of the test is to determine the temperature drop in the steel substrate when subject to a pressurized cryogenic jet where there is practically no liquid content present.