Some standard content:
National Standard of the People's Republic of China
Large caliber liquid nitrogen container
Large caliber liquid nitrogen container1 Subject content and scope of application
GB 14174-93
This standard specifies the large caliber liquid nitrogen container Product models, specifications, technical requirements, test methods, inspection rules, markings, packaging, storage and transportation of liquid nitrogen containers. This standard is applicable to animal husbandry, medical, industrial, scientific research and other departments that use liquid fluorine as refrigerant to preserve semen, bacteria (toxins) ) and other active biological materials and related instruments and component materials. Large-diameter stainless steel liquid nitrogen containers used for cold treatment, cold assembly, cold testing, etc. 2 Reference standards
GB191
GB335
GB 2829
GB3280
Packaging, storage and transportation pictorial mark
TGT type platform scale||tt ||Periodic inspection counting sampling procedures and sampling tables (suitable for inspection of production process stability) Stainless steel cold-rolled steel plate
GB4237
GB5458
GB6388
Hot-rolled stainless steel Steel plate
Liquid nitrogen biological container
Transportation packaging receipt and delivery mark
3 product model, specification
3.1 Large-diameter liquid nitrogen container model compilation method||tt| |D
Container diameter, mm
Nominal volume of container, L
The first letter of the Chinese Pinyin of "big"
The first letter of the Chinese Pinyin of "nitrogen" Letters
The first letter of the Chinese pinyin for "liquid"
Example: YDD-400-500 represents a large-diameter liquid nitrogen container with a nominal volume of 400L and a diameter of 500mm. 3.2 Schematic diagram of product structure, see Figure 1.
State Bureau of Technical Supervision approved 382 on 1993-02-16
Implemented on 1993-10-01
GB 14174—93
Figure 1
Product Structure Schematic diagram
1 vacuum valve, 2--cover plug; 3-neck tube: 4 hook; 5-low temperature adsorbent; 6-multi-layer insulation; 7--internal resistance; 8-simple; 9 - Shell; 10 - Rotary tray, 11 - Casters 3.3 Product specifications, performance parameters and overall dimensions, see Table 1. Table 1
Outer diameter
Type
No.
YDD-100-250
YDD-160-315
YDD-250- 400
YDD-400-315
YDD-400-500
YDD-630-400
YDD-630-630
YDD-1000- 500
YDD-1000-800
Technical requirements
4
Geometric volume
L
100
160| |tt||250
400
630
1000
mouth
path
250
315||tt ||400
315
500
400
630
500
800
d
mm
710
800
900
1120
1250
1500
height
h| |tt||upper
limit
1000
1060
1120
1200
1300
1400||tt ||4.1 Products should comply with the provisions of this standard and be manufactured in accordance with approved drawings and technical documents according to prescribed procedures. 4.2 Technical requirements for main components
4.2.1 Inner tank and shell
Empty weight
kg
71
112
170
250
355
500
Daily evaporation rate
%/d
1. 9
1.7|| tt||1.5
1.3
1.4
1.2
1.3
1.0
1.1
383||tt| |Provisions;
c.
4.2.2
a.
b.
4.2.3
4.2.4|| tt||a.
b.
GB 14174—93
The inner tank and outer shell of the product are made of stainless steel plates with good low-temperature performance. The steel plate should comply with the relevant products of GB3280 or GB4237. The welds of the relevant products should be tested for leaks by a nitrogen mass spectrometer leak detector; the geometric volume of the inner tank should comply with the relevant provisions of Table 1, with an allowable deviation of ±3%. Neck tube
The neck tube is made of stainless steel. The size of the
neck tube should comply with the relevant regulations in Table 2.
Table 2
Container diameter
250
315
400
500
630
800
Neck tube inner diameter
250+# 30
315+#:40
400+:55
500+g*5||tt| |630+g:00
800+:30
The product adopts vacuum multi-layer insulation or multi-screen insulation. The wrapped multi-layer insulation does not allow the low-temperature adsorbent to fall off
outside the plug diameter
248-.90
313-8.20
398-.50
497-.00
627-1..||tt| |796-No..
Use adsorbents such as activated carbon or molecular sieves with good adsorption performance in low temperature and high vacuum range. The adsorbents should be placed close to the inner tank. Thorough regeneration treatment should be carried out before placement. 4.2.5 Cover plug
a.
b.
Cover plug consists of plug body, handle and cover;
mm
plug body adopts For rigid foams such as polyvinyl chloride and polyurethane with small thermal conductivity, low water absorption and high strength, the outer diameter should comply with the relevant regulations in Table 2;
c.
4.2.6| |tt||a.
b.
The connection between the plug body and the cover should be firm and reliable.
Rotary pallets, lifts
allows the design of rotary pallets, lifts and lift pick-and-place pliers according to user needs. The rotary pallet is made of stainless steel and requires flexible rotation. The allowable total air leakage rate of the vacuum interlayer of 3 products respectively complies with the requirements in Table 3. 4.3
Table 3
Production
YDD-100-250
YDD-160-315
YDD-250-400
YDD -400-315
YDD-400-500
YDD-630-400
YDD-630-630
YDD-1000-500
YDD -1000-800
384
Product
Type
Total leakage rate (upper limit)
5×10-8
8× 10-8
1X10-7
2×10-7
3.2×10-1
5X107
Pam's-1
GB 14174--93
4.4 Products should be equipped with accessories such as electric vacuum cleaners or hair dryers for removing smoke. 4.5 The top of the product is equipped with a special connector for fixing the work light. 4.6 The outer surface of the product should be smooth and clean. 4.7 The service life of the product shall not be less than 8 years. 4.8 Under normal use by the user, the manufacturer will be responsible for three guarantees within one year from the date of shipment. 5 Test methods
5.1 Use measuring tools with a measurement accuracy higher than 0.1 mm to test the inner diameter of the neck tube and the outer diameter of the plug. 5.2 Use a nitrogen mass spectrometer leak detector with an instrument sensitivity higher than 6.7×10-1\Pams- to detect leaks in the product. 5.3 Use a weighing instrument with a graduation value of less than 0.5kg to weigh out the product with a lid and a plug, without counting the empty space. Heavy. Platform scales should comply with the regulations of GB335. 5.4 The geometric volume of the product is tested according to the relevant regulations of GB5458. 5.5 Liquid fluorine daily evaporation rate test
5.5.1 The test must be conducted at an ambient temperature of 20 ± 3°C, normal pressure, and static conditions. 5.5.2 Fill the product with liquid nitrogen that is no less than one-half of the geometric volume, close the cap, and then let it stand for 48 hours to measure the average daily evaporation of the product being tested in qm within 5 days using the weighing method or the flow method. 5.5.3 The minimum graduation value of electronic scales, industrial platform scales and other weighing instruments used in the weighing method shall not be greater than 0.5kg. 5.5.4
The daily evaporation rate measured by the weighing method is calculated by formula (1): α (%) =
Where: α-
Daily evaporation rate, %/d;
m
×100 or α(%)=
ov
9m
m -me
× 100||tt| |-The average daily evaporation calculated using the total mass of liquid nitrogen lost within 5 days, kg/d; qm
p-density of liquid nitrogen, kg/L
V
geometry Volume, L,
Total mass when the container is filled with liquid nitrogen, kg;
Empty weight of the container, kg.
me
5.5.5 When testing with the flow method, a sealing cover must be installed on the neck of the container, and an air guide tube must be connected to the evaporation rate measuring device. 5.5.6 The daily evaporation rate measured by the flow method is calculated by the following formula: α (%) =
where:
山
n
94 × 273||tt ||nv. Pressure, MPa.
T
Temperature of the gas, K.
5.6 Use visual inspection to inspect product appearance quality. X
P
0.101325
8． The outer surface of the product must be smooth and bright, and no bumps or scratches are allowed; b. The weld formation should be uniform and neat.
6 Inspection Rules
× 100
6.1 Before the product leaves the factory, the factory quality inspection department will conduct 100% inspection of the following items. Ugly, daily evaporation rate of liquid nitrogen;
b, appearance.
6.2 Unqualified classification
(1)
.(2)
385
GB14174-93
a. Liquid nitrogen Unqualified daily evaporation rate is Category A unqualified; unqualified total leakage rate is Category B unqualified;
b.
Container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, Covers, plugs, etc. that exceed the standard are classified as Category C failures. c.
6.3 Periodic inspections shall comply with the relevant provisions of GB2829. 6.3.1 The inspection cycle should be determined according to the quantity of product manufacturing. 6.3.2 Test items include: liquid nitrogen daily evaporation rate, total leakage rate, container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, cap plug, etc. 6.3.3 Test method: Inspect according to the provisions of Chapter 5. 6.3.4 Regulations on unqualified quality levels
a.
The unqualified quality level (RQL) of Category A is 25: the unqualified quality level (RQL) of Category B is 50b.
The unqualified quality level (RQL) of Category C is 250; c.
Sampling is based on the unqualified quality level (RQL) of Category C: d.
e.
During inspection, if If Category A fails, the product will be judged to be unqualified and no other inspection will be conducted. 6.3.5 Judgment level regulations usually use judgment level 1. When strong discrimination is required, judgment level 1 or 1 can be used. 6.3.6 Sampling plan type Select a sub-sampling plan with judgment level 1. 6.3.7 The sampling plan is retrieved from the unqualified quality level 250 in Table 4 of GB2829. 6.3.8 Samples should be taken from a certain batch or batches that are manufactured in this cycle and passed batch-by-batch inspection. 6.4 Products can only leave the factory after passing the inspection. When leaving the factory, it comes with product certificates, product manuals, packing lists and other documents. 7 Marking, packaging, transportation, storage
7.1 Mark
7.1.1 The main contents of the product mark include: manufacturer name;
a.
product name and model :
b.
Trademark;
c.
Production license number;
d.
e.||tt| |f.
Manufacturing date (or serial number) or production batch number; export products should be marked with "Made in the People's Republic of China" and English words. 7.1.2 Products that have passed national quality inspection should be marked with the national quality certification mark on the product. 7.2 Packaging
7.2.1 The logo and text description on the packaging box should comply with the regulations of GB6388. 7.2.2 The packaging box should be firm and reliable, with good shockproof and moisture-proof measures. The product should not shake in the packaging box. 7.2.3 The packaging, storage and transportation illustrations should comply with the regulations of GB191, and the packaging, storage and transportation illustrations such as "upward", "afraid of getting wet" and "handle with care" should be clearly marked on the outside of the box.
7.3 During transportation, products should be loaded and unloaded with care, and must not be placed sideways or upside down. 7.4 The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10|| tt||term
nominal volume
geometric volume
diameter
outer diameter
height
empty weight
total Leak rate
Product life
Daily evaporation volume
Daily evaporation rate
Additional notes:
English name
nominal volume||tt ||geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main nouns for large-diameter liquid ammonia containers Terminology
(Supplement)
Unit
L
mm
mm
mm
kg||tt| |Pam's-
kg/d
%/d
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
The volume specified in the product model
Said
Ming
The space volume limited by the geometric size of the inner edge of the liner (excluding the neck tube) The inner diameter of the neck tube| |tt||The outer diameter of the container shell
The maximum length of the container in the axial direction
The mass of the container without making allowances
Under normal temperature and pressure, the passage through the container per unit time The total amount of air leaking into the vacuum interlayer from the shell, liner, neck tube, etc.
The time interval from when the product leaves the factory until the daily evaporation rate of liquid nitrogen is higher than 60% of the standard indicator
Static, container filled The average daily evaporation of liquid nitrogen. The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container. This standard is drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
4
The daily evaporation rate measured by the weighing method is calculated by formula (1): α (%) =
Where: α-
Daily evaporation rate, %/d; || tt||m
×100 or α(%)=
ov
9m
m -me
× 100
- Average daily evaporation calculated using the total mass of liquid nitrogen lost within 5 days, kg/d; qm
p-liquid nitrogen density, kg/L
V
geometric volume, L,
The total mass of the container when it is filled with liquid nitrogen, kg;
The empty weight of the container, kg.
me
5.5.5 When testing by flow method, a sealing cover must be installed on the neck of the container, and an air guide tube must be connected to the evaporation rate measuring device. 5.5.6 The daily evaporation rate measured by the flow method is calculated by the following formula: α (%) =
where:
山
n
94 × 273||tt ||nv. Pressure, MPa.
T
Temperature of the gas, K.
5.6 Use visual inspection to inspect product appearance quality. X
P
0.101325
8. The outer surface of the product must be smooth and bright, and no bumps or scratches are allowed; b. The weld formation should be uniform and neat.
6 Inspection Rules
× 100
6.1 Before the product leaves the factory, the factory quality inspection department will conduct 100% inspection of the following items. Ugly, daily evaporation rate of liquid nitrogen;
b, appearance.
6.2 Unqualified classification
(1)
.(2)
385
GB14174-93
a. Liquid nitrogen Unsatisfactory daily evaporation rate is a Category A failure; unsatisfactory total leakage rate is a Category B failure;
b.
Container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, Covers, plugs, etc. that exceed the standard are classified as Category C failures. c.
6.3 Periodic inspections shall comply with the relevant provisions of GB2829. 6.3.1 The inspection cycle should be determined according to the quantity of product manufacturing. 6.3.2 Test items include: liquid nitrogen daily evaporation rate, total leakage rate, container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, cap plug, etc. 6.3.3 Test method: Inspect according to the provisions of Chapter 5. 6.3.4 Regulations on unqualified quality levels
a.
The unqualified quality level (RQL) of Category A is 25: the unqualified quality level (RQL) of Category B is 50b.
The unqualified quality level (RQL) of Category C is 250; c.
Sampling is based on the unqualified quality level (RQL) of Category C: d.
e.
During inspection, if If Category A fails, the product will be judged to be unqualified and no other inspection will be conducted. 6.3.5 Judgment level regulations usually use judgment level 1. When strong discrimination is required, judgment level 1 or 1 can be used. 6.3.6 Sampling plan type Select a sub-sampling plan with judgment level 1. 6.3.7 The sampling plan is retrieved from the unqualified quality level 250 in Table 4 of GB2829. 6.3.8 Samples should be taken from a certain batch or batches that are manufactured in this cycle and passed batch-by-batch inspection. 6.4 Products can only leave the factory after passing the inspection. When leaving the factory, it comes with product certificates, product instructions, packing lists and other documents. 7 Marking, packaging, transportation, storage
7.1 Mark
7.1.1 The main contents of the product mark include: manufacturer name;
a.
product name and model :
b.
Trademark;
c.
Production license number;
d.
e.||tt| |f.
Manufacturing date (or serial number) or production batch number; export products should be marked with "Made in the People's Republic of China" and English words. 7.1.2 Products that have passed national quality inspection should be marked with the national quality certification mark on the product. 7.2 Packaging
7.2.1 The logo and text description on the packaging box should comply with the regulations of GB6388. 7.2.2 The packaging box should be firm and reliable, with good shockproof and moisture-proof measures. The product should not shake in the packaging box. 7.2.3 The packaging, storage and transportation illustrations should comply with the regulations of GB191, and the packaging, storage and transportation illustrations such as "upward", "afraid of getting wet" and "handle with care" should be clearly marked on the outside of the box.
7.3 During transportation, products should be loaded and unloaded with care, and must not be placed sideways or upside down. 7.4 The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10|| tt||term
nominal volume
geometric volume
diameter
outer diameter
height
empty weight
total Leak rate
Product life
Daily evaporation volume
Daily evaporation rate
Additional notes:
English name
nominal volume||tt ||geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main nouns for large-diameter liquid ammonia containers Terminology
(Supplement)
Unit
L
mm
mm
mm
kg||tt| |Pam's-
kg/d
%/d
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
The volume specified in the product model
Said
Ming
The space volume limited by the geometric size of the inner edge of the liner (excluding the neck tube) The inner diameter of the neck tube| | tt | The total amount of air leaking into the vacuum interlayer from the shell, liner, neck tube, etc.
The time interval from when the product leaves the factory until the daily evaporation rate of liquid nitrogen is higher than 60% of the standard index
Static, container filled The average daily evaporation of liquid nitrogen. The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container. This standard is drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
4
The daily evaporation rate measured by the weighing method is calculated by formula (1): α (%) =
Where: α-
Daily evaporation rate, %/d; || tt||m
×100 or α(%)=
ov
9m
m -me
× 100
- Average daily evaporation calculated using the total mass of liquid nitrogen lost within 5 days, kg/d; qm
p-liquid nitrogen density, kg/L
V
geometric volume, L,
The total mass of the container when it is filled with liquid nitrogen, kg;
The empty weight of the container, kg.
me
5.5.5 When testing with the flow method, a sealing cover must be installed on the neck of the container, and an air guide tube must be connected to the evaporation rate measuring device. 5.5.6 The daily evaporation rate measured by the flow method is calculated by the following formula: α (%) =
where:
山
n
94 × 273||tt ||nv. Pressure, MPa.
T
Temperature of the gas, K.
5.6 Use visual inspection to inspect product appearance quality. X
P
0.101325
8. The outer surface of the product must be smooth and bright, and no bumps or scratches are allowed; b. The weld formation should be uniform and neat.
6 Inspection Rules
× 100
6.1 Before the product leaves the factory, the factory quality inspection department will conduct 100% inspection of the following items. Ugly, daily evaporation rate of liquid nitrogen;
b, appearance.
6.2 Unqualified classification
(1)
.(2)
385
GB14174-93
a. Liquid nitrogen Unqualified daily evaporation rate is Category A unqualified; unqualified total leakage rate is Category B unqualified;
b.
Container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, Covers, plugs, etc. that exceed the standard are classified as Category C failures. c.
6.3 Periodic inspections shall comply with the relevant provisions of GB2829. 6.3.1 The inspection cycle should be determined according to the quantity of product manufacturing. 6.3.2 Test items include: liquid nitrogen daily evaporation rate, total leakage rate, container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, cap plug, etc. 6.3.3 Test method: Inspect according to the provisions of Chapter 5. 6.3.4 Regulations on unqualified quality levels
a.
The unqualified quality level (RQL) of Category A is 25: the unqualified quality level (RQL) of Category B is 50b.
The unqualified quality level (RQL) of Category C is 250; c.
Sampling is based on the unqualified quality level (RQL) of Category C: d.
e.
During inspection, if If Category A fails, the product will be judged to be unqualified and no other inspection will be conducted. 6.3.5 Judgment level regulations usually use judgment level 1. When strong discrimination is required, judgment level 1 or 1 can be used. 6.3.6 Sampling plan type Select a sub-sampling plan with judgment level 1. 6.3.7 The sampling plan is retrieved from the unqualified quality level 250 in Table 4 of GB2829. 6.3.8 Samples should be taken from a certain batch or batches that are manufactured in this cycle and passed batch-by-batch inspection. 6.4 Only products that pass the inspection can leave the factory. When leaving the factory, it comes with product certificates, product manuals, packing lists and other documents. 7 Marking, packaging, transportation, storage
7.1 Mark
7.1.1 The main contents of the product mark include: manufacturer name;
a.
product name and model :
b.
Trademark;
c.
Production license number;
d.
e.||tt| |f.
Manufacturing date (or serial number) or production batch number; export products should be marked with "Made in the People's Republic of China" and English words. 7.1.2 Products that have passed national quality inspection should be marked with the national quality certification mark on the product. 7.2 Packaging
7.2.1 The logo and text description on the packaging box should comply with the regulations of GB6388. 7.2.2 The packaging box should be firm and reliable, with good shockproof and moisture-proof measures. The product should not shake in the packaging box. 7.2.3 The packaging, storage and transportation illustrations should comply with the regulations of GB191, and the packaging, storage and transportation illustrations such as "upward", "afraid of getting wet" and "handle with care" should be clearly marked on the outside of the box.
7.3 During transportation, products should be loaded and unloaded with care, and must not be placed sideways or upside down. 7.4 The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10|| tt||term
nominal volume
geometric volume
diameter
outer diameter
height
empty weight
total Leakage rate
Product life
Daily evaporation volume
Daily evaporation rate
Additional notes:
English name
nominal volume||tt ||geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main nouns for large-diameter liquid ammonia containers Terminology
(Supplement)
Unit
L
mm
mm
mm
kg||tt| |Pam's-
kg/d
%/d
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
The volume specified in the product model
Said
Ming
The space volume limited by the geometric size of the inner edge of the liner (excluding the neck tube) The inner diameter of the neck tube| | tt | The total amount of air leaking into the vacuum interlayer from the shell, liner, neck tube, etc.
The time interval from when the product leaves the factory until the daily evaporation rate of liquid nitrogen is higher than 60% of the standard index
Static, container filled The average daily evaporation of liquid nitrogen. The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container. This standard is drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
(2)
385
GB14174-93
a. Unsatisfactory liquid nitrogen daily evaporation rate is Category A unqualified; unqualified total leakage rate is Category B unqualified; || tt | | b. | | tt | c.
6.3 Periodic inspections shall comply with the relevant provisions of GB2829. 6.3.1 The inspection cycle should be determined according to the quantity of product manufacturing. 6.3.2 Test items include: liquid nitrogen daily evaporation rate, total leakage rate, container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, cap plug, etc. 6.3.3 Test method: Inspect according to the provisions of Chapter 5. 6.3.4 Regulations on unqualified quality levels
a.
The unqualified quality level (RQL) of Category A is 25: the unqualified quality level (RQL) of Category B is 50b.
The unqualified quality level (RQL) of Category C is 250; c.
Sampling is based on the unqualified quality level (RQL) of Category C: d.
e.
During inspection, if If Category A fails, the product will be judged to be unqualified and no other inspection will be conducted. 6.3.5 Judgment level regulations usually use judgment level 1. When strong discrimination is required, judgment level 1 or 1 can be used. 6.3.6 Sampling plan type Select a sub-sampling plan with judgment level 1. 6.3.7 The sampling plan is retrieved from the unqualified quality level 250 in Table 4 of GB2829. 6.3.8 Samples should be taken from a certain batch or batches that are manufactured in this cycle and passed batch-by-batch inspection. 6.4 Products can only leave the factory after passing the inspection. When leaving the factory, it comes with product certificates, product manuals, packing lists and other documents. 7 Marking, packaging, transportation, storage
7.1 Mark
7.1.1 The main contents of the product mark include: manufacturer name;
a.
product name and model :
b.
Trademark;
c.
Production license number;
d.
e.||tt| |f.
Manufacturing date (or serial number) or production batch number; export products should be marked with "Made in the People's Republic of China" and English words. 7.1.2 Products that have passed national quality inspection should be marked with the national quality certification mark on the product. 7.2 Packaging
7.2.1 The logo and text description on the packaging box should comply with the regulations of GB6388. 7.2.2 The packaging box should be firm and reliable, with good shockproof and moisture-proof measures. The product should not shake in the packaging box. 7.2.3 The packaging, storage and transportation illustrations should comply with the regulations of GB191, and the packaging, storage and transportation illustrations such as "upward", "afraid of getting wet" and "handle with care" should be clearly marked on the outside of the box.
7.3 During transportation, products should be loaded and unloaded with care, and must not be placed sideways or upside down. 7.4 The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10|| tt||term
nominal volume
geometric volume
diameter
outer diameter
height
empty weight
total Leakage rate
Product life
Daily evaporation volume
Daily evaporation rate
Additional notes:
English name
nominal volume||tt ||geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main nouns for large-diameter liquid ammonia containers Terminology
(Supplement)
Unit
L
mm
mm
mm
kg||tt| |Pam's-
kg/d
%/d
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
The volume specified in the product model
Said
Ming
The space volume limited by the geometric size of the inner edge of the liner (excluding the neck tube) The inner diameter of the neck tube| | tt | The total amount of air leaking into the vacuum interlayer from the shell, liner, neck tube, etc.
The time interval from when the product leaves the factory until the daily evaporation rate of liquid nitrogen is higher than 60% of the standard index
Static, container filled The average daily evaporation of liquid nitrogen. The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container. This standard was drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
(2)
385
GB14174—93
a. Liquid nitrogen daily evaporation rate failure is Class A failure; total leakage rate failure is Class B failure;
b.
Container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, cover plug, etc. exceeding the standard requirements are Class C failures. c.
6.3 Periodic inspections shall comply with the relevant provisions of GB2829. 6.3.1 The inspection cycle shall be determined according to the number of products manufactured. 6.3.2 Test items include: liquid nitrogen daily evaporation rate, total leakage rate, container empty weight, geometric volume, height, outer diameter, neck tube inner diameter, cover plug, etc. 6.3.3 Test method: Inspection shall be carried out in accordance with the provisions of Chapter 5. 6.3.4 Provisions for unqualified quality levels
a.
The unqualified quality level (RQL) of Class A is 25: The unqualified quality level (RQL) of Class B is 50b.
The unqualified quality level (RQL) of Class C is 250;c.
Sampling is carried out according to the unqualified quality level (RQL) of Class C:d.
e.
If Class A is unqualified during inspection, the product is judged to be unqualified and no other inspection is performed. 6.3.5 Provisions for judgment levels Usually, discrimination level 1 is used. When strong discrimination is required, discrimination levels 1 or 1 can be used.6.3.6 Type of sampling plan Select the secondary sampling plan of discrimination level 1. 6.3.7 The sampling plan is retrieved from the unqualified quality level 250 in Table 4 of GB2829. 6.3.8 Samples should be drawn from a batch or batches manufactured in this cycle and qualified after batch-by-batch inspection. 6.4 Products can only leave the factory after they have passed the inspection. When leaving the factory, they shall be accompanied by product certificates, product manuals, packing lists and other documents. 7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 The main contents of product marking include: manufacturer name;
a.
product name and model:
b.
trademark;
c.
production license number;
d.
e.
f.
manufacturing date (or number) or production batch number; export products shall be marked with "Made in the People's Republic of China" and English words. 7.1.2 Products that have passed the national quality inspection shall have the national quality certification mark marked on the product. 7.2 Packaging
7.2.1 The markings and text descriptions on the packaging box shall comply with the provisions of GB6388. 7.2.2 The packaging box should be firm and reliable, with good shock and moisture-proof measures, and the product should not shake in the packaging box. 7.2.3 The packaging storage and transportation diagram should comply with the provisions of GB191, and the packaging storage and transportation diagram signs such as "upward", "afraid of moisture", and "handle with care" should be marked in a conspicuous position outside the box.
7.3 During transportation, the product should be loaded and unloaded with care, and should not be placed sideways or upside down. 7.4 The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10
Terms
Nominal volume
Geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
Daily evaporation
Daily evaporation rate
Additional remarks:
English name
nominal volume
geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main terms and terms for large-diameter liquid ammonia containers
(supplement)
Unit
L
mm
mm
kg
Pam's-
kg/d
%/dwww.bzxz.net
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
Volume specified by the product model
Explanation
The spatial volume defined by the geometric dimensions of the inner edge of the liner (excluding the neck tube)Inner diameter of the neck tube
Outer diameter of the container shell
The maximum axial length of the container shape||t t||The mass of the container without taking into account
The total amount of gas that leaks into the vacuum interlayer through the outer shell, liner, neck tube, etc. of the container per unit time under normal temperature and pressure conditions
The time interval from the product leaving the factory to the daily evaporation rate of liquid nitrogen exceeding the standard index by 60%
The daily average evaporation of liquid nitrogen in the container under static conditions The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container This standard was drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
4. The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10|| tt||term
nominal volume
geometric volume
diameter
outer diameter
height
empty weight
total Leak rate
Product life
Daily evaporation volume
Daily evaporation rate
Additional notes:
English name
nominal volume||tt ||geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main nouns for large-diameter liquid ammonia containers Terminology
(Supplement)
Unit
L
mm
mm
mm
kg||tt| |Pam's-
kg/d
%/d
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
The volume specified in the product model
Said
Ming
The space volume limited by the geometric size of the inner edge of the liner (excluding the neck tube) The inner diameter of the neck tube| | tt | The total amount of air leaking into the vacuum interlayer from the shell, liner, neck tube, etc.
The time interval from when the product leaves the factory until the daily evaporation rate of liquid nitrogen is higher than 60% of the standard index
Static, container filled The average daily evaporation of liquid nitrogen. The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container. This standard is drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
4. The product should be stored in a cool and dry place.
386
Serial number
3
6
7
8
9
10|| tt||term
nominal volume
geometric volume
diameter
outer diameter
height
empty weight
total Leakage rate
Product life
Daily evaporation volume
Daily evaporation rate
Additional notes:
English name
nominal volume||tt ||geometric volume
calibre
outside diameter
height
weight empty
total leak rate
product life
quantity of
daily evaporation
daily evaporation
rate
GB 14174—93
Appendix A
Main nouns for large-diameter liquid ammonia containers Terminology
(Supplement)
Unit
L
mm
mm
mm
kg||tt| |Pam's-
kg/d
%/d
This standard is proposed by the Quality Standards Department of the Ministry of Agriculture. Symbol
V.
V
C
d
h
me
Le
qm
The volume specified in the product model
Said
Ming
The space volume limited by the geometric size of the inner edge of the liner (excluding the neck tube) The inner diameter of the neck tube| | tt | The total amount of air leaking into the vacuum interlayer from the shell, liner, neck tube, etc.
The time interval from when the product leaves the factory until the daily evaporation rate of liquid nitrogen is higher than 60% of the standard index
Static, container filled The average daily evaporation of liquid nitrogen. The percentage value of the mass of liquid nitrogen converted from the daily evaporation to the geometric volume of the container. This standard is drafted by the Lanzhou Institute of Physics of the Ministry of Aeronautics and Astronautics. The drafters of this standard are Sun Changwen, Yuan Yu, and Bi Longsheng. 387
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