This part of GB/T 18442 specifies the selection principles and setting requirements of safety accessories, instruments and loading and unloading accessories used in static vacuum insulated cryogenic pressure vessels (hereinafter referred to as "cryogenic vessels"), as well as the calculation of the safety relief volume of tanks and the discharge capacity of overpressure relief devices.
This part is applicable to cryogenic vessels that simultaneously meet the following conditions:
a) cryogenic vessel with the working pressure of inner vessel not less than 0.1 MPa;
b) cryogenic vessel with the geometric volume not less than 1 m3;
c) cryogenic vessel with the insulation mode of vacuum powder insulation, vacuum composite insulation or high vacuum multilayer insulation;
d) cryogenic vessel with storing refrigerated liquefied gas contents with standard boiling point not lower than -196℃.
This standard is not applicable to cryogenic vessels that meet the following conditions:
a) cryogenic vessel with the inner vessel and the outer jacket made of non-ferrous metals or non-metallic materials;
b) cryogenic vessel with spherical structure;
c) cryogenic vessel with stacked insulation;
d) transportable cryogenic vessel;
d) cryogenic vessel storing refrigerated liquefied gas contents with standard boiling point lower than -196℃;
f) cryogenic vessel storing toxic gas as specified in GB 12268;
g) cryogenic vessel with special requirements such as national defense military equipment.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150 (all parts) Pressure vessels
GB/T 567.1 Bursting disc safety devices - Part 1: Basic requirement
GB/T 567.2 Bursting disc safety devices - Part 2: Application, selection and installation
GB/T 567.3 Bursting disc safety devices - Part 3: Classification and mounting dimensions
GB/T 567.4 Bursting disc safety devices - Part 4: Type test
GB/T 18442.1 Static vacuum insulated cryogenic pressure vessels - Part 1: General requirements
GB/T 18442.3 Static vacuum insulated cryogenic pressure vessels - Part 3: Design
GB/T 18442.5 Static vacuum insulated cryogenic pressure Vessels - Part 5: Inspection and testing
GB/T 24918 Cryogenic emergency shutoff valve
GB/T 29026 Spring loaded safety valve for cryogenic service
JB/T 6804 Shock-resistant pressure gauge
TSG 21 Supervision regulation on safety technology for stationary pressure vessel
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 150, GB/T 18442.1, GB/T 18442.3, and GB/T 18442.5 apply.
GB/T 18442.6-2019 The following standards are cited：
GB/T 18442.6-2019 Cited by the following standards：
