Skydd mot brand

Ämnesområden: Brandbekämpning; Brandskydd
Kommittébeteckning: SIS/TK 360 (Brand och räddning)
Källa: SIS
Svarsdatum: den 28 feb 2018
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Kommittébeteckning: SIS/TK 289 (Gassystem)
Källa: ISO
Svarsdatum: den 5 mar 2018
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This part of ISO 20088 describes a method for determining the resistance of a Cryogenic Spill Protection (CSP) systems to a cryogenic jet as a result of a pressurised release which does not result in immersion conditions. It is applicable where CSP systems are installed on carbon steel and will be in contact with cryogenic fluids.

A cryogenic jet may be formed upon release from process equipment operating at pressure (e.g., some liquefaction processes utilise 40 - 60 bar operating pressure). Due to high pressure discharge, the cryogenic spillage protection may be compromised by the large momentum combined with extreme cryogenic temperature.

Although the test uses liquid nitrogen (LIN) as the cryogenic liquid, the test described in this standard is representative of a release of LNG, through a 20mm orifice or less, at a release pressure of 6 barg or less, based upon simulated parameters 1 m from the release point. Confidence in this test being representative is based upon a comparison of the expected dynamic pressure of the simulated release in comparison with dynamic pressure from releases in accordance with this part of the ISO 20088 standard.

It should be recognised that it is not practical in this test to cover the whole range of cryogenic process conditions found in real plant conditions; in particular the test does not cover high pressure cryogenic jet releases that may be found in refrigeration circuits and in LNG streams immediately post-liquefaction.

LIN is used as the cryogenic medium due to the ability to handle the material at the pressures described in this part of the standard safely. The test condition is run at 8 barg pressure.

Part 1 of the standard covers cryogenic release scenarios which may lead to immersion conditions for steel work protected by cryogenic spill protection as a result of a jet release or low pressure release of LNG or LIN. Part 2 of the standard covers vapour phase exposure conditions as a result of a jet release or low pressure release of LNG or LIN.

Kommittébeteckning: SIS/TK 181 (Brandsäkerhet)
Källa: SIS
Svarsdatum: den 9 mar 2018
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This Technical Specification provides guidance for a probabilistic approach for fire safety engineering. Guidance is given for the use of fire safety engineering methods to evaluate compliance with an absolute criterion. This guidance can also be used in combination with INSTA/TS 950 in order to evaluate compliance with a comparative criterion. Performance criteria (acceptance criteria), relevant fire safety engineering methods and input data (reliability data and fire statistics) are within the scope of this report.

This document is intended to be used as a reference for building authorities and for use in verifying compliance with regulations by fire safety designers, local authorities and others in the building industry.

The information given within this Technical Specification should not be seen as requirements, but guidance on verifying compliance with functional requirements in a performance-based regime – e.g. performance criteria on property loss do not apply in regions or nations where only life safety is governed by the authority having jurisdiction. In these cases, a voluntary performance criteria for property safety must be set in in a process involving the relevant stakeholders.

NOTE Limitations regarding the use of this specification may be set in the National Annex.

The user of this Technical Specification must verify that applied models are valid for the relevant design situation and that national requirements are met.

Kommittébeteckning: SIS/TK 181 (Brandsäkerhet)
Källa: SIS
Svarsdatum: den 9 mar 2018
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This Technical Report provides guidance for when and how to conduct review and control within the field of performance based fire safety design as a part of the overall building process.

The aim of the process that has been developed is to facilitate verification of building solutions including innovative and sustainable solutions and to harmonize the process for control within the field of fire safety engineering in the Nordic countries.

The focus for the process is on a general level for review and control, independent of national legal matters in the Nordic countries, with a primary focus on technical issues within fire safety engineering. But the process will also, to some extent, give guidance on how the fire safety design process, including engineering approaches, can be a normal part of the overall control and review of the building process and define eligibility criteria for those doing the control.

This specification includes:

when to perform controls within the building process and within the specific fire safety design process;

how to perform the controls;

why the controls should be performed and their purpose.

This specification is intended to be used as a reference document for building authorities and for use in connection with regulations by consultants, local authorities and stakeholders in the building industry.

NOTE Limitations regarding the use of this specification may be set in the National Annex.

The user of this specification must verify that the described processes are valid to the relevant design situation and that national requirements are met. It does not detail all the engineering knowledge required for the building fire safety design.