GB/T 31480-2015 High vacuum multilayer insulation materials for cryogenic containers GB/T31480-2015 |tt| Standard compression package decompression password: www.bzxz.net
This standard specifies the product types and models, raw materials, technical requirements, test methods, inspection rules, markings, product factory data and packaging, transportation and storage requirements of high vacuum multilayer insulation materials commonly used in cryogenic containers. This standard is applicable to insulation materials composed of alternate combinations of spacer materials and reflective screens in cryogenic containers using high vacuum multilayer insulation. ||
tt||This standard was drafted in accordance with the rules given in GB/T1.1-2009.
This standard was proposed and managed by the National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC262).
The drafting organizations of this standard are: Hangzhou Fujita Special Materials Co., Ltd., Shanghai Gas Industry Association, China Special Equipment Testing and Research Institute, Zhangjiagang Branch of Jiangsu Special Equipment Safety Supervision and Inspection Institute, National Petroleum Drilling and Refining Equipment Quality Supervision and Inspection Center, Changzhou Bolang Cryogenic Equipment Co., Ltd., East China University of Science and Technology, Shanghai Special Equipment Supervision and Inspection Technology Research Institute, Shanghai Huayi Group Equipment Engineering Co., Ltd., Zhejiang University, Institute of Physical and Chemical Technology of the Chinese Academy of Sciences, CIMC Enric Investment Holding (Shenzhen) Co., Ltd., Zhangjiagang CIMC Sanctum Cryogenic Equipment Co., Ltd., Zhejiang Blue Energy Gas Equipment Co., Ltd.
The main drafters of this standard are: Ying Jianming, Shi Fengping, Chen Zhaohui, Zhou Weiming, Tan Wei, Ma Xiaogang, Hui Hu, Xu Dongqiu, Xu Guoqiang, Xue Xiaolong, Gan Zhihua, Zhang Liang, Shen Xian, Liang Dongzhou, Wei Wei, Wei Yongbiao, Wang Lian.
The following documents are indispensable for the application of this document. For all dated referenced documents, only the dated version applies to this document. For any un-dated referenced documents, the latest version (including all amendments) shall apply to this document.
GB/T451.1 Determination of size and deflection of paper and paperboard
GB/T451.2 Determination of basis weight of paper and paperboard
GB/T451.3 Determination of thickness of paper and paperboard
GB/T3198 Aluminium and aluminium alloy foil
GB/T9914.2 Test methods for reinforced products Part 2: Determination of combustible content of glass fibre
GB/T12914 Determination of tensile strength of paper and paperboard
GB/T14014 Synthetic fibre mesh
GB/T15717 Vacuum metallisation thickness test method - Electrical resistance method
GB/T16958 Biaxially oriented polyester film for packaging GB/T22638.5 Test methods for
aluminium foil - Part 5: Water brushing test method
GB/T31481—2015 Guidelines for determining the compatibility of materials for cryogenic containers with gases
BB/T0030—2004 Aluminum-coated films for packaging
JB/T8105.1 Rubber-sealed vacuum gauge joints
JB/T8105.2 Metal-sealed vacuum gauge joints
JC/T170 E glass fiber cloth

ICS 23.020.40
National Standard of the People's Republic of China
GB/T31480—2015
Materials for high vacuum multilayer insulation cf crytzenic vessel2015-05-15Published
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
2015-09-01Implementation
GB/T 31480—2015
Normative reference documents
Terms and definitions
4 Product types and models
Raw materials
Technical requirements
Test methods
8 Inspection rules
9 Marking, product factory information
Packaging, transportation and storage
Appendix A (Normative Appendix) Apparent thermal conductivity test method Appendix B (Normative Appendix) Outgassing rate test method
This standard was drafted according to the rules given in GB/T1.1—2009. Technical standards are proposed and managed by the National Technical Committee for Standardization of Boilers and Pressure Vessels (SAC/TC262), GB/T31480--2015
The drafting units of this standard are: Hangzhou Fujita Special Materials Co., Ltd., Shanghai Gas Industry Association, China Special Equipment Testing and Research Institute, Zhangjiagang Branch of Jiangsu Special Equipment Safety Supervision and Inspection Institute, National Petroleum Station Refining Equipment Quality Supervision and Inspection Center. Changzhou Bolang Cryogenic Equipment Co., Ltd., East China University of Science and Technology. Shanghai Special Equipment Supervision and Inspection Technology Research Institute, Haihuayi Group Equipment Engineering Co., Ltd., Zhejiang University, Institute of Physical and Chemical Technology of the Chinese Academy of Sciences, CIMC Enric Investment Holding (Shenzhen) Co., Ltd., Zhangjiagang CIMC Shengdain Cryogenic Equipment Co., Ltd., Zhejiang Blue Energy Gas Equipment Co., Ltd. The main drafters of this standard are: Ying Jianming, Shi Fengpeng, Chen Chaohui, Zhou Weiming, Tan Wei, Ma Xiaogang, Hui Hu, Xu Dongqiu, Xu Guoqiang, Zui Xiaolong, Gan Zhihua, Zhang Liang, Shen Rao, Liang Dongzhou, Wei Wei, Wei Yongbiao, Wang Lian. 1
1 Scope
High vacuum multilayer insulation materials for cryogenic containers GB/T 31480—2015
This standard specifies the product types and models, raw materials, technical requirements, test methods, inspection rules, markings, product factory information, packaging, transportation and storage requirements of high vacuum multilayer insulation materials commonly used in cryogenic containers. This standard applies to insulation materials composed of alternately bonded intermediate materials and reflective screens in cryogenic containers using high vacuum multilayer insulation.
2 Normative references
The following documents are essential for the application of this document. For all dated references, only the dated version applies to this document. For undated references, the latest version (including the stored amendments) applies to this document. GB/T 451.1 Paper and paperboard - Determination of size and skewness GB/T 451.2 Paper and paperboard - Determination of basis weight GB/T 451.3 Paper and paperboard - Determination of thickness GB/T 3198 Aluminium and aluminium alloy foil GE/T 9914.2 Test methods for reinforced products - Part 2: Determination of combustible content of glass fibre doors GB/T 2914 Test methods for tensile strength of paper and paperboard GB/T 1404 Synthetic fibre screen GB/T 15717 Test method for thickness of vacuum metallization coating (B, T [5958 Biaxially oriented polyester film for packaging CB/T 22633.5 Aluminium - Test methods - Part 5: Water brushing test method GB/T 314812015 Guidelines for determining the compatibility of materials and gases for cryogenic containers EF/T00302004 Aluminum-coated film for packaging
JB, T8105.1: Rubber sealed vacuum gauge joint JE: T8E05.2 Metal sealed vacuum gauge joint JC/T170E Fiberglass cloth
3 Terms and definitions
The following terms and definitions apply to this document. 3.1
Commercial vacuum multilayer insulation highvacuumtuItilayerinsulation In the high vacuum interlayer space of a cryogenic container, an insulation method formed by alternating between spacer materials and reflective screens. 3.2
Reflective screen heat-resistant radiation shield Metal foil with high reflectivity or film with metal coating, 3.3
Spacer material spacing material
Insulating material used between reflective screens to prevent two adjacent reflective screens from directly contacting each other. -iiiKAoNhiKAca
GB/T 31480—2015
Apparent thermal conductivityThe amount of heat transferred through a unit thickness of an insulating material per unit time under specified test conditions. 3.5
Outgassing rate
The amount of gas released by a unit mass of material per unit time under specified test conditions. 3.6
Multilayer insulation unit is composed of one or more layers of spacing material and one layer of reflective screen. 3.7
Multilayer insulation roll is composed of one or more units rolled on a roll core. 3.8
Multilayer insulation blanket Blanket is composed of several units of a certain shape stacked and fixed. 4 Product Type and Model
4.1 Unit
4.1.1 Structure
The typical structure of the unit is shown in Figure 1.
Description:
Reflective screen,
Spacer material.
Figure 1 Schematic diagram of a typical unit
Raw material types and codes
Raw material types and codes are shown in Table 1.
Table 1 Raw material types and codes
Raw materials
Glass fiber paper
Spacer material
Reflective screen
Glass fiber cloth
Chemical fiber paper
Synthetic fiber screen
Aluminum-coated mulberry film
The unit identification is shown in Examples 1 and 2, and the corresponding codes are shown in Table 1. Example 1: ZL, represents a unit composed of 1 layer of glass fiber paper and 1 layer of aluminum foil. Example 2: P7. L, represents a unit composed of 1 layer of chemical fiber paper, 1 layer of glass fiber paper and 1 layer of aluminum foil. 4.2 Rolled products
4.2.1 Product structure
The typical structure of a rolled product is shown in Figure 2. Explanation;
Roll content:
2~～5——units.
Figure 2 Schematic diagram of typical structure of roll products
2 Product model and specification
The roll product model is determined according to Figure 3 and Table 1, J-3-0-0-0-0
indicates compatibility with oxygen: Y indicates compatible indicates insoluble indicates the number of units
indicates degree, unit mm
indicates the type of reflective screen, code table 1
· indicates the type of two materials. The code is shown in Table 1. Specified roll structure
Figure 3 Roll product model
GB/T 31480—2015
Example 1: JzL-1110-5-Y indicates a roll high vacuum multi-layer insulation material composed of 1 layer of glass fiber paper and 1 layer of aluminum shrink film, with a product width of 1 110 MM and a unit number of 5, which is compatible with oxygen.
Example 2: JPD-900-5-N indicates a unit composed of 1 layer of chemical fiber paper and 1 layer of polyester film, with a product width of 90U ⅡMM and 5 units. It is incompatible with oxygen. Example 3: J-2PZ-L.-1220-2-N indicates a unit composed of 1 layer of glass fiber paper, 1 layer of chemical fiber paper, 1 layer of glass fiber paper and 1 layer of aluminum foil, with a product width of 1 220 m and 2 units. It is incompatible with oxygen. 4.3 Quilt-shaped products
4.3.1 Product structure
The typical structure of quilt-shaped products is shown in Figure 4. 3
-iiiKAoNniKAca
GB/T 31480—2015
Description:
—-Fixed extension piece;
Reflective screen 1
—-Spacer material.
4.3.2 Quilt-like product models and examples
Figure 4 Schematic diagram of typical structure of quilt-like products
Quilt-like product models are carried out according to the provisions of Figure 5. BOOOC
Indicates compatibility with oxygen, Y indicates compatibility, and N indicates incompatibility. Indicates the modification number of quilt-like products, represented by [, Ⅱ, Ⅱ, etc. Indicates the straight section length of the cryogenic container, unit mm Indicates the diameter of the cryogenic container, unit mm
Indicates quilt-like products
Figure 5 Quilt-like product model
Example 1. B-600-1343-IY indicates a quilt-like high vacuum multilayer insulation material for covering a container with a diameter of 600mm and a straight section length of 1343mm, type II, and compatible with oxygen.
Example 2: B-2364-11310-1-N indicates a blanket-shaped high vacuum multilayer insulation material used to cover a container with a diameter of 2361mm and a straight section length of 11310mm, type I, and incompatible with oxygen. bzxz.net
5 Raw materials
5.1 General requirements
5.1.1 Raw materials shall comply with the provisions of relevant standards and provide product certificates. 5.1.2 According to the working conditions of the cryogenic container, the compatibility with oxygen shall be considered when selecting raw materials. 5.1.3 The process performance of raw materials shall be able to meet the requirements of construction, baking temperature resistance and vacuuming of cryogenic containers. 5.1.4 When there are special requirements, the supply and demand parties may negotiate separately. 5.2
Spacer materials
Spacer material types and their compatibility with oxygen 5.2.1.1
Typical spacer materials include glass fiber paper, glass fiber cloth, chemical fiber paper, synthetic fiber screen, etc. 5.2.1.2
The compatibility of spacer materials with oxygen should be evaluated according to 4.3 of GB/T31481-2015. 5.2.2 Glass fiber paper
5.2.2.1 The thickness should be tested according to the method of GB/T451.3 and should not be greater than 0.08mm. 5.2.2.2 The quantitative strength should be tested according to the method of GB/T451.2 and should be (14±2.0)g/m. 4
5.2.2.3 The longitudinal tensile strength should be tested according to the method of GB/T12911 and should not be less than 0.03kN/m. 5.2.2.4 The combustible content shall not be greater than 1.0% (mass fraction) as tested by the method of GB/T9914.2. 5.2.3 Fiberglass cloth
Fiberglass cloth shall comply with the provisions of JC/T170. 5.2.3.2 The thickness shall be tested according to the method of GB/T451.3, and it should be 0.(5mm~0.25mm. The longitudinal tensile strength shall be tested according to the method of GB/T12914, and it should not be less than 0.06kV/m. 5.2.3.3
GB/T31480-—2015
5.2.3.4 It shall be degreased and dewaxed. The combustible content shall be tested according to the method of (B/T9914.2, and it should not be greater than 0.2% (mass fraction). 5.2.41
Chemical fiber paper
5.2.4.1 The thickness shall be tested according to the method of GB/T451.3, and it should not be 0.08mm. 5.2.4.2
2 Quantitative determination shall be carried out according to GB/T 451.2 method test, preferably (10 ± 2.0) g/㎡2. Longitudinal tensile strength according to GB/T12911 method test, should not be less than 0.06 kV/m. 5.2.4.3
5.2.5 Synthetic fiber screen
5.2.5.1 Synthetic fiber screen should meet the first-class requirements specified in GB/T 1:1011. 5.2.5.2 Thickness according to (G13/T 451.3 method test, should not be greater than 0.08 mm. 5.2.5.3 Longitudinal tensile strength according to GB/T 12911 method test, should not be less than TC.06 kN/m. 5.3 Reflection screen
5 3.1 Types of reflective screens and their compatibility with hydrogen 5.3.1.1 Typical types of reflective screens include aluminum, plated polyester film, etc. 5.3. 1.2 The reflection and palm resistance of the roof should be evaluated according to GE/T 31481-2015. 5.3.2 Aluminum awnings
5.3.2.1 The thickness should meet the requirements of CB/T398. 5.3.2.2 The thickness should be C.c0450.025
5.3.2.3 The water reduction test should be carried out according to GE/T 22338.5 and should reach the health grade. 5.3.2.4 The longitudinal tensile strength should meet the requirements of GB/T 12914 method test, not less than 0.27kN/m. 5.3.3 Aluminum-coated polyester film
5.3.3.1 The aluminum-coated film shall comply with the provisions of BB/T0030-2001. The surface shall have a continuous, bright luster, no oil stains, and the edges shall be smooth and flat. Visually inspected against the light source, there shall be no obvious scratches, holes, impurities, or aluminum coating shedding. 5.3.3.2 The base material of the aluminum-coated polyester film shall comply with the provisions of GB/T16958, and the thickness shall be 0.005mm~0.025mm. 5.3.3.3 Aluminum-coated polyester film The purity of the aluminum layer shall be tested according to the method of GB/T15717 and shall not be greater than 1.00/(resistance method). 5.3.3.4 The uniformity of the aluminum layer shall be tested according to the method of GB/T15717 and shall be better than ±10%. 5.3.3.5 The adhesion of the aluminum layer (expressed by the area of ​​aluminum layer shedding) shall be tested according to the method of 6.12 in BB/T0030-2004 and shall not be greater than 10%.
6 Technical requirements
6.1 Manufacturing environment requirements
6.1.1 The entire manufacturing process shall be carried out in a clean environment. 5
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GB/T 31480—2015
6.1.2 The surfaces of the manufacturing equipment, tooling and tools in contact with the materials shall be kept clean and oil-free. 6.1.3 Human body shall be prevented from directly contacting the raw materials during the production process. 6.2 Manufacturing requirements for units
6.2.1 The reflective screen can be provided with ventilation holes.
6.2.2 Adhesives, tapes and other chemical bonding materials should not be used to space the spacing material and the reflective screen layer. 6.2.3 The unit surface should be clean and should not have stains such as oil, sweat, fingerprints, etc. 6.2.4 The spacing material and the edge of the reflective screen should be parallel, and the width of the spacing material should be greater than the width of the reflective screen. The reflective screen should be evenly distributed in the middle of the spacing material, and the shrinkage on both sides of the reflective screen should not be less than 2mm and not more than 18m. 6.2.5 The width of the unit shall be based on the width of the spacing material, and the allowable deviation of the width shall comply with the provisions of Table 2. Table 2 Width allowable deviation
Width W/mm
100W500
500AW1000
1000≤2 000
6.2.6 Apparent thermal conductivity
Allowable deviation/mm
Take a representative sample of the unit for testing. The apparent thermal conductivity shall not be greater than 1.35×10-4W/(m·K). 6.2.7 Outgassing rate
Take a representative sample of the unit for testing. The outgassing rate shall not be greater than 8×10-7Pa·m2/s·g). 6.2.8 Temperature resistance
Take a representative sample of the unit for testing. The spacing material and the reflective screen shall not show adhesion, damage, embrittlement, etc. 6.3 Product Manufacturing Requirements
6.3.1 General Requirements
6.3.1.1 The product surface should be clean and free of stains such as oil, sweat, fingerprints, etc. 6.3.1.2 The width misalignment between each unit should not exceed 10 mm. 6.3,2 Manufacturing Requirements for Rolled Products
6.3.2.1 Aluminum foil tape should be used for spacing materials or reflective screen joints. Organic substrate tape should not be used. The joints between layers should be staggered. 6.3.2.2 The end faces of rolled products should be neat and the paper rolls should be round. There should be no defects such as end face tower deformation and cracks that affect use. 6.3.2.3 The core length of rolled products shall not be less than the width of the product, and one end is not allowed to be recessed into the product. 6.3.3 Manufacturing Requirements for Quilted Products
6.3.3.1 Fixing measures should be taken between each unit. The fixings should be clean and evenly distributed. 6.3.3.2 Chemical adhesives such as adhesives and tapes should not be used for fixing. 6
6.3.3.3 The thickness of the same quilt-like product should not have obvious deviation. 7 Test method
7.1 Appearance quality
The appearance quality shall be visually inspected as required, and the surface cleanliness shall comply with the requirements of 6.3.1.1. 7.2 Reflection screen indentation
GB/T 31480—2015
The indentation of the reflective screen shall be tested according to the method of GB/T451.1, expressed as the distance between the edge of the reflective screen and the edge of the spacer material, and shall comply with the provisions of 6.2.4.
7.3 Width deviation
The width deviation shall be tested according to the method of (GB/T451.1., and shall comply with the provisions of 6.2.5, 7.4 Width misalignment chamber
Width misalignment shall be tested according to the method of GB/T451.1. It shall be expressed as the misalignment of the edge of the spacer material on the same side of the two units and shall comply with the provisions of 6.3.1.2.
7.5 Thermal conductivity
Thermal conductivity shall be tested according to the method specified in Appendix A and shall comply with the provisions of 6.2.6. 7. Thermal conductivity
Temperature coefficient shall be tested according to the method specified in Test Record 13 and shall comply with the provisions of 6.2.7. 7. Temperature coefficient
The representative test center of the 30 cm × 300 mm unit shall be placed flat in an oven between two 300 m × acc mm plated plates with a thickness of 2 mm, humidified to (170-5) ° C for 24 hours, and the sample shall be taken out for visual inspection and shall comply with the provisions of 6.2.8. 7.6 Compatibility test
7.8.1 Representative test The gold wire combustion test with oxygen shall be tested according to the relevant methods in CB/T31481-2015. 7.8.2 The representative sample of the rolled product is the full thickness sample of the high vacuum multilayer insulation material wound in the interlayer space of the cryogenic container. 7.8.3 The representative sample of the blanket product is the full thickness sample of the blanket high vacuum multilayer insulation material. 8 Inspection rules
8.1 Inspection classification
Inspection is divided into unit inspection, product inspection and performance test. The inspection items are shown in Table 3. 8.2 Unit inspection
Unit inspection is a piece-by-piece inspection. The items are as specified in Table 3. 8.3 Product Inspection
Product inspection is piece-by-piece inspection, and the items shall be in accordance with the provisions of Table 3.-iiiKAoNniKAca
GB/T 31480—2015
8.4 Performance Test
Performance test shall be carried out in any of the following cases, and the test items shall be in accordance with the provisions of Table 3: a) When the product design is finalized;
After formal production, if there are changes in raw materials, processes, etc. that may affect product performance, performance tests shall be carried out once a year for normally produced products. Table 3 Inspection Items
Inspection Items
Appearance Quality
Reflection Screen Indentation
Width Deviation
Width Misalignment
Apparent Thermal Conductivity
Outgassing Rate
Heat Resistance
Frame Capacity Test
9 Marking, Product Factory Data
9.1 Marking
9.1.1 Marking Content
Product marking shall at least include the following contents: Unit Inspection
Product Name, Product Model, Product Standard Number; a
Manufacturing Enterprise Name, Address, Telephone Number:
Production Date and Batch Number;
Quantity:
“Moisture-proof”, “Handle with Care” and “Do Not Squeeze” and other packaging and handling marks. 9.1.2 Marking Position
Product marking shall be marked on the outer packaging.
9.2 Product factory information
9.2.1 Product factory information shall at least include the certificate and quality certification documents. 9.2.2 The product certificate shall at least include the following contents: a) product name and model;
b) product factory batch number;
c) factory inspection mark.
9.2.3 The quality certificate shall at least include the following contents: a
Unit apparent thermal conductivity test report;
Product inspection
Performance test
Unit outgassing rate test report;
Unit temperature resistance test report,
Product compatibility test report with nitrogen;
Safe use precautions
Packaging, transportation and storage
10.1 Packaging
GB/T 31480—2015
The outer packaging of the product shall be moisture-proof, damage-proof, and prevent the product from deformation and damage. If there are special requirements, the supply and demand parties shall negotiate and determine. Transportation
Handle with care during transportation. Avoid squeezing, collision, and exposure to the sun and rain. Storage
The product should be stored in a clean, ventilated, dry warehouse and should be placed overhead to avoid heavy pressure. -iiKAoNhiKAca
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