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DIN EN ISO 21013-3:2016-12

Cryogenic vessels - Pressure-relief accessories for cryogenic service - Part 3: Sizing and capacity determination (ISO 21013-3:2016); German version EN ISO 21013-3:2016 / Note: To be replaced by DIN EN ISO 21013-3 (2025-04).

Fecha edición: 2016-12-01
En Vigor
Idiomas disponibles: Inglés, Alemán
Resumen: This part of ISO 21013 provides separate calculation methods for determining the required mass flow to be relieved for each of the following specified conditions: - vacuum-insulated vessels with insulation system (outer jacket + insulating material) intact under normal vacuum, outer jacket at ambient temperature, inner vessel at temperature of the contents at the specified relieving pressure; - vacuum-insulated vessels with insulation system (outer jacket + insulating material) intact under normal vacuum, outer jacket at ambient temperature, inner vessel at temperature of the contents at the specified relieving pressure, pressure regulator of the pressure build-up system functioning at full potential; - vacuum or non-vacuum-insulated vessels with insulation system remaining in place, but with loss of vacuum in the case of vacuum-insulated vessels, outer jacket at ambient temperature, inner vessel at temperature of the contents at the specified relieving pressure or vacuum or non-vacuum-insulated vessels with insulation system remaining fully or partially in place, but with loss of vacuum in the case of vacuum-insulated vessels, fire engulfment, inner vessel at temperature of the contents at the specified relieving pressure; - vacuum-insulated vessels containing fluids with saturation temperature below 75 K at 1 bar with insulation system remaining in place, but with loss of vacuum with air or nitrogen in the vacuum space; - vacuum insulated vessels containing fluids with saturation temperature below 75 K at 1 bar with insulation system remaining in place, but with loss of vacuum with air or nitrogen in the vacuum space with fire engulfment; - vessels with insulation system totally lost and fire engulfment. Good engineering practice based on well-established theoretical physical science needs to be adopted to determine the required mass flow where an appropriate calculation method is not provided for an applicable condition. Recommendations for pressure relief devices for cryostats are given in Annex A.
Keywords: Bursting discs|CE marking|Condensing|Containers|Cryogenic|Cryogenic vessels|Design|Dimensioning|Discharge flow measurement|Excess pressures|Fire conditions|Flows|Heat transmission|Identification plates|Marking|Mass flow|Mathematical calculations|Methods of calculation|Performance tests|Pneumatic tests|Pressure|Pressure control valves|Pressure overload|Pressure releases|Safety device|Safety requirements|Safety valves|Size measurement|Specification|Specification (approval)|Tanks|Testing|Tightness|Valves
ICS: 23.020.40 - Depósitos criogénicos, 23.060.40 - Reguladores de presión
CTN:

Equivalencia Internacional

Idéntica EN ISO 21013-3:2016

Idéntica ISO 21013-3:2016

Reemplazo Normas

Reemplaza a DIN EN 13648-3:2003-01

Reemplaza a DIN EN ISO 21013-3:2014-10

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