GB/T 16774-2012 in English

《GB/T 16774-2012自增压式液氮容器》由TC262（全国锅炉压力容器标准化技术委员会）归口，TC262SC8（全国锅炉压力容器标准化技术委员会低温容器分会）执行，主管部门为国家标准化管理委员会。

Autoboosting caliber liquid nitrogen container

1 Scope

1.1 This Standard specifies the requirements in product classification, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation of austenitic stainless steel autoboosting caliber liquid nitrogen containers (hereinafter referred to as autoboosting containers).

1.2 This Standard is applicable to the design and manufacturing of autoboosting containers, applied with high vacuum multilayer insulation, used for storing and/or transporting liquid nitrogen, with a working pressure of less than 0.1 Mpa and an effective volume of 50L ~ 800L.

1.3 This Standard is not applicable to the following autoboosting containers:

—— Ones used for storage of liquid nitrogen under pressure;

—— Ones used for storage of liquid oxygen or other cryogenic liquids.

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 150.1 Pressure vessels - Part 1: General requirements
GB 150.2 Pressure Vessels - Part 2: Materials
GB 150.3 Pressure vessels - Part 3: Design
GB/T 191-2008 Packaging - Pictorial marking for handling of goods
GB 567.1 Bursting disc safety devices - Part 1: Basic requirement
GB 567.2 Bursting disc safety devices - Part 2: Application, selection and installation
GB 567.3 Bursting disc safety devices - Part 3: Classification and mounting dimensions
GB/T 1226-2010 General pressure gauge
GB/T 3198-2010 Aluminium and aluminium alloys foils
GB/T 3280-2007 Cold rolled stainless steel plate, sheet and strip
GB/T 12241-2005 Safety valves - General requirements
GB/T 13550-1992 Molecular sieve 5A and its determination
GB/T 14976-2012 Seamless stainless steel pipes for fluid transport
GB/T 16958-2008 Biaxially oriented polyester film for package
GB/T 18442.3 Static vacuum insulated cryogenic pressure vessels - Part 3: Design
GB/T 18443.2 Testing method of performance for vacuum insulation cryogenic equipment - Part 2: Vacuum degree measurement
GB/T 18443.3 Testing method of performance for vacuum insulation cryogenic equipment - Part 3: Leak rate measurement
GB/T 18443.5 Testing method of performance for vacuum insulation cryogenic equipment - Part 5: Static evaporation rate measurement
GB/T 18443.8 Testing method of performance for vacuum insulation cryogenic equipment - Part 8: Volume measurement
GB 24511-2009 Stainless steel plate, sheet and strip for pressure equipment
HG/T 2690-1995 Molecular sieve 13X
NB/T 47014 Welding procedure qualification for pressure equipment

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB 150.1~150.3 and GB/T 18442.3 and the following apply.

3.1
geometric volume
internal volume of the inner liner determined according to the designed geometric dimension minus the volume occupied by the inner parts

3.2
effective volume
maximum volume of liquid that is allowed to be filled in an inner liner in use

3.3
vacuum designed life
normal service life of container interlayer vacuum determined in the design, which is the time interval from the container leaving the factory to the moment when the static evaporation rate exceeds the upper limit value of the standard index by 60%

4 Classification

4.1 Autoboosting containers are classified into vertical and horizontal types.

4.2 The type of a container shall be determined according to the following requirements:



Example 1: YDZ-50 represents a vertical autoboosting container with an effective volume of 50L.

Example 2: YDZ-200W represents a horizontal autoboosting container with an effective volume of 200L.

4.3 See Annex A for the types and specifications of autoboosting containers.

4.4 The structures of autoboosting containers are shown in Figures 1 and 2.

5 Technical requirements

5.1 General

5.1.1 The use ambient temperature of autoboosting containers shall be -20℃ to 50℃;

5.1.2 The materials that may come into contact with liquid nitrogen shall be compatible with liquid nitrogen.

5.1.3 Purchased parts for containers shall have quality certificate or conformity certificate.

5.2 Materials

5.2.1 Steel plate

Austenitic stainless steel plates for shell and liner shall meet the requirements specified in GB/T 3280 or GB 24511.

Foreword i
1 Scope
3 Terms and definitions
4 Classification
5 Technical requirement
6 Test method
7 Inspection rules
8 Marking, packaging, storage and transportation
Annex A (Informative) Main types and specifications of autoboosting containers