NBN EN 12308 : 1998
Current
The latest, up-to-date edition.
INSTALLATIONS AND EQUIPMENT FOR LNG - SUITABILITY TESTING OF GASKETS DESIGNED FOR FLANGED JOINTS USED ON LNG PIPING
01-12-2013
Foreword
1 Scope
2 Normative references
3 Definitions
3.1 liquefied natural gas (LNG)
3.2 nominal diameter (DN)
3.3 nominal pressure (PN)
3.4 NPS
3.5 Class
3.6 Class of pressure
3.7 Ps (allowable pressure)
3.8 Required bolting load Fa
4 Design specifications of tested gaskets
5 Technical documentation by the gasket manufacturer
6 Check of compatibility between bolting load and
mechanical strength of joint components
6.1 Compatibility with flanges
6.2 Compatibility with bolting
7 Means and equipment required for testing
7.1 Test rig
7.2 Measuring equipment
8 Testing
8.1 Application of bolting load
8.2 Leak testing at ambient temperature
8.3 Leak testing at cold temperature
9 Acceptance criterion
10 Test report
Annex A (informative) Thermo-mechanical behaviour of a
flanged joint with gasket
Annex B (informative) Test rig
Annex C (normative) Method for verifying the bolting load
Annex D (normative) DN equivalence for tests
Annex E (normative) PN equivalence for tests
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