Some standard content:
GB/T17590-1998
This standard adopts the contents of ISO3004/3:1981 "Sealed Metal Cans for Food and Beverages Part 3: Beverage Cans", ISO1361:1981 "Thin-walled Metal Packaging Containers - Open-top Round Cans - Inside Diameter", the United States Brewers Association (USBA) "Beer Industry Recommended Can Specification Manual" (1983 edition), the United States Soft Drinks Association (SSDT) "Recommended Gold Dust Soft Drink Cans and Lids Quality Control Methods" (1988 edition) and other relevant national and regional standards, and is formulated based on my country's production, use practices and scientific research results. The responsible drafting units of this standard are: National Packaging Product Quality Supervision and Inspection Center (Guangzhou), China Food Fermentation Industry Research Institute, Sanshui Jianlibao Fute Container Co., Ltd., Jiangsu Dayang United Iron Printing Co., Ltd., and participating units: Guangzhou Meite Container Co., Ltd., Fujian Lianjian Group Co., Ltd., Foshan Xingda Container Co., Ltd., Taicang Xingda System Co., Ltd., Sanshui Qiangli United Container Co., Ltd., Dongguan Sanyuan Iron Printing Can Co., Ltd., Shantou Special Economic Zone Baihua Container Co., Ltd., Hebei Airen Juice Co., Ltd., Tianjin Meite Packaging Co., Ltd., Zhejiang Yi Niao Easy Opening Cap Co., Ltd.
The main drafters of this standard are: Zhang Wencan, Zhao Chuanggou, Fan Yazhen, Zhou Jinchang, Pan Didong, Du Zhiqiang, Huang Meiyu, Xu Sang, Huang Yihao, Yan Tingming, Lai Qingkun, Li Jiansen, Zheng Tiegang, and Chen Xiaohong. 141
1 Scope
National Standard of the People's Republic of China
Three-piece can with easy open end
Three-piece can with easy open end GB/T 17590-1998
This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of three-piece cans with easy open end. This standard applies to the manufacture, use, circulation and supervision inspection of three-piece cans with easy open end made of tin (chromium) plated steel sheet and aluminum alloy plate for filling non-aerated beverages and foods, which meet the requirements of commercial sterility after sealing and sterilization. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the new versions of the following standards. GB191—1990 Pictorial signs for packaging, storage and transportation
GB/T2520—1988 Tinned sheets and steel strips GB/T2828—1987 Batch-by-batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB/T 3526—1983
Low carbon steel cold-rolled steel strip
GB/T8230-1987 Technical conditions for epoxy phenolic type coated tinned (or chrome-plated) steel sheets 1 Packaging terms Metal containers
GB/T 13040—1991
GB/T 14251—1993
3 Definitions and symbols
3.1 Definitions
Technical conditions for tinned steel sheet round canned containers This standard adopts the definitions in GB/T13040—1991 and the following definitions. 3.1.1 Three-piece can with easy open end A metal coating can made by connecting the easy open end, bottom cover and body. 3.1.2 Striped can
A can with a coating can with a coating can welded.
3.1.3 Sprayed can
A can with a coating can welded. 3.1.4 Splash point
When moving welding, the welding temperature is too high, so that the center temperature of the welding point reaches or exceeds the melting point of iron, and the molten metal is squeezed out and thrown out. Commonly known as burrs.
3.1.5 Cold welding
When the welding temperature is too low, the two thin steel plates to be welded fail to reach the state of plastic melting (only tin is melted). Commonly known as false welding or virtual welding. 3.1.6 Pin hole
During welding, the hot melted tin-plated steel sheet cools slower than the shrinkage of the tin-plated steel sheet, thus forming a penetrating hole. 3.1.7 Puncture
Approved by the State Administration of Quality and Technical Supervision on December 2, 1998 142
Implemented on June 1, 1999
GB/T 17590—1998
Individual welding points in the weld are melted and perforated due to the sudden excessive welding current (such as caused by residual coating, etc.). 3.1.8 Miss-welding
No current flows through one or more welding points in the weld. 3.1.9 Stripe
An anti-corrosion coating applied on the weld and its sides by roller coating, spray coating, flow coating or electrostatic spraying. 3.1.10 The enamel rate of the inner coating integrity is expressed as defect current. The current caused by the appearance of unnecessary micropores on the surface of the inner coating due to improper raw materials and processing technology. 3.2 Symbols
D—nominal diameter of the can body;
d—inner diameter of the can neck;
H—height of the can body;
B—flange width.
Easy-open end, bottom cover:
D hook edge outer diameter;
h—hook edge opening;
c—countersunkness,
h—hook edge height.
4 Classification
4.1 Can body
4.1.1 According to the can type, it is divided into neck-reduced and vertical-round, see Figure 1. 4.1.2 According to the can structure, it is divided into sealed easy-open cans and sealed bottom cover cans. B
4.2 Easy open end
Neck-constricted body illustration
4.2.1 According to the material, it is divided into aluminum alloy thin plate easy open end and tin (chrome) plated steel plate easy open end. 4.2.2 According to the structure, it is divided into pull ring type, retaining plate type and full opening type easy open end, see Figure 2. H
Vertical round body illustration
Pull ring type easy open end illustration
4.3 Bottom cover
GB/T 17590—1998
Retaining plate type easy open end illustration
According to the material, it is divided into tin (chrome) plated steel plate and aluminum alloy thin plate bottom cover, see Figure 3. Bottom cover diagram
4.4 Example of three-piece easy-open cover specification code:
206/211/209×308
Can height specification code
Bottom cover specification code
Hip body nominal diameter specification code
Easy-open cover specification code
5 Requirements
5.1 Basic requirements
5.1.1 Products shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.1.2 Raw materials shall be inspected and qualified before use. Full-open easy-open cover diagram
5.1.3 The contents of the product filling are different, and the requirements for the physical and chemical properties of the inner coating and sealant are different. The manufacturer shall provide the purchaser with sample cans for endurance testing and obtain confirmation.
5. 1. 4 Special requirements for product specifications, performance and acceptance shall be agreed upon by both parties and included in the contract. 5.2 Raw materials
5.2.1 Tin-plated steel sheet
GB/T 17590—1998
Tin-plated steel sheet in accordance with GB/T2520 shall be used as the material for the can body, bottom cover and easy-open end, and its appearance quality shall comply with the provisions of Group 1 of GB/T2520—1988.
5.2.2 Chrome-plated steel sheet
In the chrome-plated layer, the minimum average metal chromium layer mass is 30mg/m2, and the hydrated chromium oxide layer is 5mg/m2. Its appearance quality refers to the provisions of Group 1 of GB/T2520—1988.
5.2.3 Aluminum alloy sheet
Aluminum-magnesium alloy sheet with appropriate tensile strength, yield strength, elongation and thickness should be used as the material for easy-open covers and bottom covers. 5.2.4 Cold-rolled low-carbon steel strip
A cold-rolled low-carbon steel strip with a bright surface, appropriate tensile strength, elongation and thickness should be used as the pull ring material for easy-open covers of (chrome) plated steel sheets, and its quality should comply with the provisions of GB/T3526. 5.2.5 The coating volume, adhesion and impact resistance of epoxy phenolic type coated tin (chrome) plated steel sheets should comply with the provisions of GB/T8230. 5.2.6 Sealant
A sealant that meets food hygiene requirements and is suitable for the characteristics of the corresponding contents should be used. 5.2.7 Inner coating
The inner coating of the product should meet the relevant food hygiene requirements. 5.3 Body
5.3.1 The main dimensions and limit deviations of the body shall conform to the provisions of Figure 2 and Table 1. Table 1
Specification code
Nominal capacity
Inner diameter of tank body DI)
Height of tank body H
Flange width B
Inner diameter of tank neck d
Easy-to-open cans
Bottom-covered cans
Easy-to-open cans
Bottom-covered cans
200/202/
/200/202/202/202/
206/211/|206/211/206/211/209/2 11/209/211/200X402|200×504|202X504209×2149209×408209×413209×413|209×3094209×309
52.30±0.15
132.90±0.30
2.50±0.20
2.50±0.20
50.00±0.15
50.00±0.15
1) The inner diameter of the body is only the process size.
The double crimping sealing structure shall meet the requirements of Table 2. 212
Joint length, mm
Tightness, %
Joint rate, %
5.3.3 Appearance quality of can body
The thickness of the easy-open cover or bottom cover of the aluminum alloy sheet ≥0.76
65.30±0.15
2.65±0.20
2.30±0.20
62.50±0.15
57. 10±0. 15
121.95±0.30
2.65±0.20
2.65±0.20
62.50±0.15
62.50±0.15
Cans with easy-open lids or bottom lids sealed with chrome-plated thin steel plates>1.00
GB/T17590--1998
5.3.3.1 The can body shall be free of deformation, complete flange, no obvious damage, no pollution, and no odor. 5.3.3.2 The double curling shall be smooth and uniform, and there shall be no quick mouth, false curling and large edge on the curling part, and there shall be no defects such as incomplete curling, curling teeth, iron tongue, jump seal, curling breakage, filler extrusion, sharp edge, drooping lip, double line, etc. 5.3.3.3 The weld seam shall be flat and smooth, without cold welding or holes. There shall be no spatter points on the inside of the weld seam. The sum of the tail and misalignment of the weld end shall not exceed 0.5mm, and the repainting shall be complete.
5.3.3.4 The printed pattern shall be clear, complete, smooth and without deformation, and the barcode shall comply with the relevant standards. 5.3.3.5 The inner and outer coatings shall be uniform, smooth, complete and clean. 5.3.4 Performance of the inner and outer coatings of the tank body
5.3.4.1 After the 100℃ coating curing test, the inner coating shall not be whitened, peeled off or detached, the outer coating shall not be obviously glossy, peeled off or detached, and the printed pattern shall not be obviously faded.
5.3.4.2 According to the characteristics of the contents and the requirements of the sterilization process, after the corrosion resistance test of the medulla and the cover at 100℃ or 121℃, the inner coating shall not be whitened, peeled off or detached, and there shall be no obvious corrosion.
5.3.4.3 According to the characteristics of the filling contents, different coating amounts and different types of coatings should be used, and whether full spraying is used should be determined. The coating amount inside and outside the tank body should comply with the provisions of Table 3. 5.3.4.4
Coating amount
Suspicious parts
Tin (chromium) plate
Aluminum alloy plate
Easy to open end
Aluminum alloy plate
Tin (chromium) plate
Minimum internal coating amount g/m2
Weld repair coating tank
Full spray coating tank
5.3.4.5 The integrity of the weld outer repair coating should be free of linear corrosion or intensive corrosion points after testing. The main properties of the tank body should comply with the provisions of Table 4. 5.3.5
Integrity of inner coating, mA
Welding seam repair can
Fully sprayed can
Compressive strength, kPa
Sealing
5.4 Easy-open end, bottom cover
Performance index
Single value 50, average value ≤30
Single value ≤15, average value ≤8
≥150 (≥180 when magnetic height is greater than 2 times of medullary diameter) Minimum outer coating quantity
Maintain pressure at 150 kPa (180 kPa when magnetic height is greater than 2 times of can diameter) for 1 min without filling and leakage allowed 5.4.1 The main dimensions and limit deviations of easy-open end and bottom cover shall comply with the requirements of Figure 4 and Table 5. D,
Main dimensions of easy-open end and bottom cover
Name and code
Hook edge outer diameter D1
Hook edge opening 6
Burial c
Hook edge height h
50.80mmNumber
Pull ring type
6.00±0.13
2.20±0.20
5.4.2Appearance quality of easy-open end and bottom cover
GB/T 17590—1998
Leave sheet type
Fully open type
5.4.2.1The structure should be intact, and the hook edge should not have obvious wrinkles and deformation. 5.4.2.2The cover should be clean, and the internal and external coatings should be intact. 5.4.2.3The sealant should be intact and evenly hooked.
5.4.3 The main performances of easy-open covers and bottom covers shall comply with the requirements of Table 6. Table 6
Name and code
Mass of dry film of sealant, mg
Breaking force, N
Full opening force, N
Opening reliability
Integrity of inner coating film, mA
Compressive strength, kPa
Sealing
6 Test method
Aluminum alloy sheet
6.1 Appearance inspection, by visual inspection.
6.2 Inspection of main dimensions
Tin (chrome) plated steel sheet
(Fully open)
45 ~65
Pull ring does not fall off when opened
Single value≤15
72.10±0.25
3.00±0.13
3.00±0.13
3.80±0.13
2.00±0.20
(Fully open)
20～30
Average value≤8
Pressure maintained at 150 kPa for 1 min Leakage of the cover is not allowed
The main dimensions of the can body, easy-open cover and bottom cover are measured with special or general measuring (instrument), and the reading value of the measuring (instrument) shall not exceed 0.01 mm. 6.3 Double crimping sealing structure inspection
The selected length, delivery rate and tightness shall be inspected in accordance with GB/T 14251. 6.4 Internal coating integrity inspection
Use an internal coating integrity tester with a reading value not greater than 0.1 mA and a working voltage of DC 6.3V. Connect the can body to the positive electrode, add 2% (m/V) sodium sulfate solution inside, with the liquid level 3mm from the can mouth, insert a stainless steel rod to connect to the negative electrode, and read the internal coating defect current value at the 4th second. 6.5 Integrity test of inner coating of easy-open ends and bottom covers 147
GB/T 17590--1998
6.5.1 For the integrity test of inner coating of easy-open ends and bottom covers of aluminum alloy sheets, use an inner coating integrity tester with a reading value not greater than 0.1 mA and a working voltage of 6.3 V DC, test with 1% (m/V) sodium chloride solution, and read the inner coating defect current value at the 4th second. 6.5.2 For the integrity test of inner coating of easy-open ends and bottom covers of tinned (chromium) steel sheets, use an inner coating integrity tester with a reading value not greater than 0.1 mA and a working voltage of 6.3 V DC, test with 2% (m/V) sodium sulfate solution, and read the inner coating defect current value at the 4th second.
6.6 Inspection of sealant film quality
Use a balance with a sensitivity of 0.001g to weigh the cover with glue injection as W1, remove the sealant, and weigh it after drying as W2. The mass of the dry sealant film W=Wi-W2.
6.7 Inspection of the opening force and full opening force of easy-open cover
Use the opening force and full opening force tester with a reading value not greater than 1N to inspect the cover, and read the maximum value when the pull ring is opened and when the pull ring is completely separated.
6.8 Pressure resistance test of easy-open cover and bottom cover
Use the cover pressure resistance tester with a reading value not greater than 10kPa to slowly increase the pressure of the cover to 150kPa (gauge pressure), maintain the pressure for .1min, and observe whether the cover has permanent deformation after the pressure is released.
6.9 Sealing test of easy-open cover and bottom cover
During the test of 6.8, observe whether the sample has leakage. 6.10 Test of tank body pressure resistance
Put the tank body into water, fill the tank with compressed air and slowly increase the pressure to 150kPa (gauge pressure), maintain the pressure for 1min, and observe whether the tank body has permanent deformation after pressure relief.
6.11 Test of tank body sealing
When conducting the test in 6.10, observe whether the tank body has leakage. 6.12 Inspection of internal and external coating quality
6.12.1 Test of internal and external coating curing
Put the tank body or cover as a whole into a steaming pot, add steamed water to immerse the sample, heat to 100℃, keep the temperature constant for 30min, take it out, and visually inspect it after cooling.
6.12.2 Test of internal coating corrosion resistance
According to the characteristics of the contents and the sterilization requirements, immerse the tank body or cover in a closed container containing the corresponding test solution listed in Table 7, and conduct the test under the corresponding conditions. After the test, conduct a visual inspection. Table 7
Content characteristics
Acidic contents sterilized at normal pressure
Protein-containing contents sterilized at high pressureLow-acid or other contents sterilized at high pressure 6.12.3 Determination of internal coating amount
Test solution
2% (m/V) citric acid solution
0.05% (m/V) sodium sulfide solutionAdjust pH to 6.0 with 3% (V/V) acetic acid
2% (m/V) citric acid solution
Test conditions
100℃, 30min
121℃, 30 min
121℃, 30 min
The internal coating amount is determined by an electronic thickness gauge with an accuracy of 0.5 g/m2; it can also be determined according to the method specified in GB/T 8230. 6.12.4 Integrity test of external repair coating
Immerse the weld external repair coating in 20% copper sulfate and 10% hydrochloric acid solution, take out the sample after 2 minutes, and inspect visually. 6.13 Reliability test of easy-open end
Open the easy-open end after curing test by hand or simple tools. 148
Inspection rules
GB/T 17590—1998
7.1 Product quality shall be sampled and inspected according to the indicators and test methods specified in this standard and in accordance with Article 4.8.3 of GB/T2828—1987. 7.2 The quality department of the manufacturer shall inspect the products according to the provisions of this standard and issue a certificate of conformity. 7.3 Factory inspection The products of the same variety and specification delivered in the same batch shall be the inspection batch. 7.4 Inspection of three-piece cans with easy-open ends is divided into factory inspection and type inspection. 7.4.1 Factory inspection
Main dimensions, sealing structure, corrosion resistance, internal coating and internal coating integrity are factory inspection items, and factory inspection shall be carried out according to the corresponding inspection methods.
7.4.2 Type inspection
7.4.2.1 Articles 5.1 to 5.4 of this standard are type inspection items, and the inspection shall be carried out according to the provisions and corresponding inspection methods listed in Tables 8, 9, 10, 11 and 12.
Table 8 Classification of appearance defects of easy-open lid and bottom cover
Easy-open lid and bottom cover
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Defects inside
Defects, broken glue, obvious oil stains on the inside of the lid, foreign matter pollution, metal exposure, coating film detachment or peeling Falling, serious wrinkles on the hook edge, easy to open lid without pull ring
Sealant pollution, partial lack of glue, obvious deformation of the hook edge, scratches and abrasions on the inner and outer coatings but no metal exposure, slight wrinkles and deformation on the hook edge, uneven overlap of sealant Table 9 Classification of can body appearance defects
Obvious oil stains, foreign matter pollution, metal exposure, cold welding, leakage welding, holes, breakdown, flange mouth, double curling, large collapsed edge, fast mouth
Obvious bubbles and burnt yellowing on the inner coating and inner patch coating, the maximum of the four marks on the can body is no more than 1 cm, and no damage to the inner coating is caused, obvious scratches, inverted printing pattern, inner printing color, incomplete curling, jump sealing, fragmentation, slight difference between the printing color and the sample, slight misalignment of the printing pattern, small scratches that do not expose the metal, overflow of curling glue, misalignment of welds, tailing exceeding 0.5 mm
Inspection items
Integrity of inner coating film
Easy to open cover, bottom cover
Breaking force
Full opening force
Opening reliability
Quality of dry film of sealant
Compressive strength
Sealing
Batch inspection level
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class C unqualified Grade
Class A unqualified
Class A unqualified
Qualified quality level
Inspection items
Double curling structure
Integrity of inner coating
Integrity of welding and subsequent coating
Compressive strength
Sealing
Easy to open end, bottom cover, tank body
Inspection level
Inspection items
Inner coating curing
Corrosion resistance
Inner coating quantity
Batch range
≥35001
35001~~500000
≥500 001
≥35 001~500 000
≥500001
GB/T17590—1998
Table 10 (Complete)
Batch inspection level
Non-conformity classification
Class A non-conformity
Batch range
≥35001
Qualified quality level
7.4.2.2 Type inspection should be carried out for products in any of the following situations. 150
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class B unqualified
Class A unqualified
Class A unqualified
Number of inspection samples
Number of samples
Qualified quality level
Judgment array|| tt||Determination array
GB/T17590—1998
a) New products or old products are converted to trial production and type identification; b) When the structure, material, process changes may affect the product performance; c) Normal production, inspection every six months; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection, to) When the national quality supervision agency proposes a type inspection requirement. 7.5 The user has the right to conduct inspections according to the provisions listed in Tables 6 to 10 or the order contract. After the product arrives at the user, the user should conduct acceptance. If the number of unqualified products exceeds the specified number, it can be rejected, but it is allowed to remove the defective products and submit them for acceptance again. The qualification level remains unchanged. If it is still unqualified, it is judged that the batch is unqualified. 8 Marking
8.1 The can body should have the manufacturer's mark. 8.2 The product packaging side should have a product inspection certificate and relevant marks, and the marks should comply with the provisions of GB191. The certificate of conformity shall have the manufacturer's mark and name, product name, product specifications, production number, production date, number, etc. 9 Packaging
Should meet the requirements of containerized transportation, the packaging materials should be clean and dry, and no odor or pollution is allowed. 9.1 Easy-open cover and bottom cover packaging
9.1.1 Easy-open cover and bottom cover are packed in neutral paper bags. 9.1.2 Easy-open cover and bottom cover are packed in cartons or pallets after bagging. The box mouth should be closed when packed in cartons. When packed in pallets, they are packed with strapping tape and plastic film.
9.2 Can packaging
Cans are packed in pallets. The number of packaging cans and the number of layers shall be agreed upon by the supply and financing parties. The layers shall be separated by neutral cardboard, and wrapped with strapping tape and plastic film.
10 Transportation
The means of transportation should be clean and dry, and no odor or pollution is allowed. During shipment, the product should be kept away from rain, sun exposure, moisture and damage. 11 Purchase and Storage
11.1 The product should be stored in a ventilated, dry and clean warehouse, away from direct sunlight. 11.2 Under normal storage conditions, the product shelf life is two years. 15112 Internal and external coating quality inspection
6.12.1 Internal and external coating curing test
Put the body or cover as a whole in a steamer, add steamed water to immerse the sample, heat to 100℃, keep the temperature constant for 30 minutes, take it out, and visually inspect it after cooling.
6.12.2 Internal coating corrosion resistance test
According to the characteristics of the contents and sterilization requirements, immerse the body or cover in a closed container filled with the corresponding test solution listed in Table 7, and conduct the test under the corresponding conditions. After the test, conduct a visual inspection. Table 7
Content characteristics
Acidic contents sterilized at normal pressure
Protein-containing contents sterilized at high pressureLow-acid or other contents sterilized at high pressure 6.12.3 Determination of internal coating amount
Test solution
2% (m/V) citric acid solution
0.05% (m/V) sodium sulfide solutionAdjust pH to 6.0 with 3% (V/V) acetic acid
2% (m/V) citric acid solution
Test conditions
100℃, 30min
121℃, 30 min
121℃, 30 min
The internal coating amount is determined by an electronic thickness gauge with an accuracy of 0.5 g/m2; it can also be determined according to the method specified in GB/T 8230. 6.12.4 Integrity test of external repair coating
Immerse the weld external repair coating in 20% copper sulfate and 10% hydrochloric acid solution, take out the sample after 2 minutes, and inspect visually. 6.13 Reliability test of easy-open end
Open the easy-open end after curing test by hand or simple tools. 148
Inspection rules
GB/T 17590—1998
7.1 Product quality shall be sampled and inspected according to the indicators and test methods specified in this standard and in accordance with Article 4.8.3 of GB/T2828—1987. 7.2 The quality department of the manufacturer shall inspect the products according to the provisions of this standard and issue a certificate of conformity. 7.3 Factory inspection The products of the same variety and specification delivered in the same batch shall be the inspection batch. 7.4 Inspection of three-piece cans with easy-open ends is divided into factory inspection and type inspection. 7.4.1 Factory inspection
Main dimensions, sealing structure, corrosion resistance, internal coating and internal coating integrity are factory inspection items, and factory inspection shall be carried out according to the corresponding inspection methods.
7.4.2 Type inspection
7.4.2.1 Articles 5.1 to 5.4 of this standard are type inspection items, and the inspection shall be carried out according to the provisions and corresponding inspection methods listed in Tables 8, 9, 10, 11 and 12.
Table 8 Classification of appearance defects of easy-open lid and bottom cover
Easy-open lid and bottom cover
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Defects inside
Defects, broken glue, obvious oil stains on the inside of the lid, foreign matter pollution, metal exposure, coating film detachment or peeling Falling, serious wrinkles on the hook edge, easy to open lid without pull ring
Sealant pollution, partial lack of glue, obvious deformation of the hook edge, scratches and abrasions on the inner and outer coatings but no metal exposure, slight wrinkles and deformation on the hook edge, uneven overlap of sealant Table 9 Classification of can body appearance defects
Obvious oil stains, foreign matter pollution, metal exposure, cold welding, leakage welding, holes, breakdown, flange mouth, double curling, large collapsed edge, fast mouth
Obvious bubbles and burnt yellowing on the inner coating and inner patch coating, the maximum of the four marks on the can body is no more than 1 cm, and no damage to the inner coating is caused, obvious scratches, inverted printing pattern, inner printing color, incomplete curling, jump sealing, fragmentation, slight difference between the printing color and the sample, slight misalignment of the printing pattern, small scratches that do not expose the metal, overflow of curling glue, misalignment of welds, tailing exceeding 0.5 mm
Inspection items
Integrity of inner coating film
Easy to open cover, bottom cover
Breaking force
Full opening force
Opening reliability
Quality of dry film of sealant
Compressive strength
Sealing
Batch inspection level
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class C unqualified Grade
Class A unqualified
Class A unqualified
Qualified quality level
Inspection items
Double curling structure
Integrity of inner coating
Integrity of welding and subsequent coating
Compressive strength
Sealing
Easy to open end, bottom cover, tank body
Inspection level
Inspection items
Inner coating curing
Corrosion resistance
Inner coating quantity
Batch range
≥35001
35001~~500000
≥500 001
≥35 001~500 000
≥500001
GB/T17590—1998
Table 10 (Complete)
Batch inspection level
Non-conformity classification
Class A non-conformity
Batch range
≥35001
Qualified quality level
7.4.2.2 Type inspection should be carried out for products in any of the following situations. 150
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class B unqualified
Class A unqualified
Class A unqualified
Number of inspection samples
Number of samples
Qualified quality level
Judgment array|| tt||Determination array
GB/T17590—1998
a) New products or old products are converted to trial production and type identification; b) When the structure, material, process changes may affect the product performance; c) Normal production, inspection every six months; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection, to) When the national quality supervision agency proposes a type inspection requirement. 7.5 The user has the right to conduct inspections according to the provisions listed in Tables 6 to 10 or the order contract. After the product arrives at the user, the user should conduct acceptance. If the number of unqualified products exceeds the specified number, it can be rejected, but it is allowed to remove the defective products and submit them for acceptance again. The qualification level remains unchanged. If it is still unqualified, it is judged that the batch is unqualified. 8 Marking
8.1 The can body should have the manufacturer's mark. 8.2 The product packaging side should have a product inspection certificate and relevant marks, and the marks should comply with the provisions of GB191. The certificate of conformity shall have the manufacturer's mark and name, product name, product specifications, production number, production date, number, etc. 9 Packaging
Should meet the requirements of containerized transportation, the packaging materials should be clean and dry, and no odor or pollution is allowed. 9.1 Easy-open cover and bottom cover packaging
9.1.1 Easy-open cover and bottom cover are packed in neutral paper bags. 9.1.2 Easy-open cover and bottom cover are packed in cartons or pallets after bagging. The box mouth should be closed when packed in cartons. When packed in pallets, they are packed with strapping tape and plastic film.
9.2 Can packaging
Cans are packed in pallets. The number of packaging cans and the number of layers shall be agreed upon by the supply and financing parties. The layers shall be separated by neutral cardboard, and wrapped with strapping tape and plastic film.
10 Transportation
The means of transportation should be clean and dry, and no odor or pollution is allowed. During shipment, the product should be kept away from rain, sun exposure, moisture and damage. 11 Purchase and Storage
11.1 The product should be stored in a ventilated, dry and clean warehouse, away from direct sunlight. 11.2 Under normal storage conditions, the product shelf life is two years. 15112 Internal and external coating quality inspection
6.12.1 Internal and external coating curing test
Put the body or cover as a whole in a steamer, add steamed water to immerse the sample, heat to 100℃, keep the temperature constant for 30 minutes, take it out, and visually inspect it after cooling.
6.12.2 Internal coating corrosion resistance test
According to the characteristics of the contents and sterilization requirements, immerse the body or cover in a closed container filled with the corresponding test solution listed in Table 7, and conduct the test under the corresponding conditions. After the test, conduct a visual inspection. Table 7
Content characteristics
Acidic contents sterilized at normal pressure
Protein-containing contents sterilized at high pressureLow-acid or other contents sterilized at high pressure 6.12.3 Determination of internal coating amount
Test solution
2% (m/V) citric acid solution
0.05% (m/V) sodium sulfide solutionAdjust pH to 6.0 with 3% (V/V) acetic acid
2% (m/V) citric acid solution
Test conditions
100℃, 30min
121℃, 30 min
121℃, 30 min
The internal coating amount is determined by an electronic thickness gauge with an accuracy of 0.5 g/m2; it can also be determined according to the method specified in GB/T 8230. 6.12.4 Integrity test of external repair coating
Immerse the weld external repair coating in 20% copper sulfate and 10% hydrochloric acid solution, take out the sample after 2 minutes, and inspect visually. 6.13 Reliability test of easy-open end
Open the easy-open end after curing test by hand or simple tools. 148
Inspection rules
GB/T 17590—1998
7.1 Product quality shall be sampled and inspected according to the indicators and test methods specified in this standard and in accordance with Article 4.8.3 of GB/T2828—1987. 7.2 The quality department of the manufacturer shall inspect the products according to the provisions of this standard and issue a certificate of conformity. 7.3 Factory inspection The products of the same variety and specification delivered in the same batch shall be the inspection batch. 7.4 Inspection of three-piece cans with easy-open ends is divided into factory inspection and type inspection. 7.4.1 Factory inspection
Main dimensions, sealing structure, corrosion resistance, internal coating and internal coating integrity are factory inspection items, and factory inspection shall be carried out according to the corresponding inspection methods.
7.4.2 Type inspection
7.4.2.1 Articles 5.1 to 5.4 of this standard are type inspection items, and the inspection shall be carried out according to the provisions and corresponding inspection methods listed in Tables 8, 9, 10, 11 and 12.
Table 8 Classification of appearance defects of easy-open lid and bottom cover
Easy-open lid and bottom cover
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Defects inside
Defects, broken glue, obvious oil stains on the inside of the lid, foreign matter pollution, metal exposure, coating film detachment or peeling Falling, serious wrinkles on the hook edge, easy to open lid without pull ring
Sealant pollution, partial lack of glue, obvious deformation of the hook edge, scratches and abrasions on the inner and outer coatings but no metal exposure, slight wrinkles and deformation on the hook edge, uneven overlap of sealant Table 9 Classification of can body appearance defects
Obvious oil stains, foreign matter pollution, metal exposure, cold welding, leakage welding, holes, breakdown, flange mouth, double curling, large collapsed edge, fast mouth
Obvious bubbles and burnt yellowing on the inner coating and inner patch coating, the maximum of the four marks on the can body is no more than 1 cm, and no damage to the inner coating is caused, obvious scratches, inverted printing pattern, inner printing color, incomplete curling, jump sealing, fragmentation, slight difference between the printing color and the sample, slight misalignment of the printing pattern, small scratches that do not expose the metal, overflow of curling glue, misalignment of welds, tailing exceeding 0.5 mm
Inspection items
Integrity of inner coating film
Easy to open cover, bottom cover
Breaking force
Full opening force
Opening reliability
Quality of dry film of sealant
Compressive strength
Sealing
Batch inspection level
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class C unqualified Grade
Class A unqualified
Class A unqualified
Qualified quality level
Inspection items
Double curling structure
Integrity of inner coating
Integrity of welding and subsequent coating
Compressive strength
Sealing
Easy to open end, bottom cover, tank body
Inspection level
Inspection items
Inner coating curing
Corrosion resistance
Inner coating quantity
Batch range
≥35001
35001~~500000
≥500 001
≥35 001~500 000
≥500001
GB/T17590—1998
Table 10 (Complete)
Batch inspection level
Non-conformity classification
Class A non-conformity
Batch range
≥35001
Qualified quality level
7.4.2.2 Type inspection should be carried out for products in any of the following situations. 150
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class B unqualified
Class A unqualified
Class A unqualified
Number of inspection samples
Number of samples
Qualified quality level
Judgment array|| tt||Determination array
GB/T17590—1998
a) New products or old products are converted to trial production and type identification; b) When the structure, material, process changes may affect the product performance; c) Normal production, inspection every six months; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection, to) When the national quality supervision agency proposes a type inspection requirement. 7.5 The user has the right to conduct inspections according to the provisions listed in Tables 6 to 10 or the order contract. After the product arrives at the user, the user should conduct acceptance. If the number of unqualified products exceeds the specified number, it can be rejected, but it is allowed to remove the defective products and submit them for acceptance again. The qualification level remains unchanged. If it is still unqualified, it is judged that the batch is unqualified. 8 Marking
8.1 The can body should have the manufacturer's mark. 8.2 The product packaging side should have a product inspection certificate and relevant marks, and the marks should comply with the provisions of GB191. The certificate of conformity shall have the manufacturer's mark and name, product name, product specifications, production number, production date, number, etc. 9 Packaging
Should meet the requirements of containerized transportation, the packaging materials should be clean and dry, and no odor or pollution is allowed. 9.1 Easy-open cover and bottom cover packaging
9.1.1 Easy-open cover and bottom cover are packed in neutral paper bags. 9.1.2 Easy-open cover and bottom cover are packed in cartons or pallets after bagging. The box mouth should be closed when packed in cartons. When packed in pallets, they are packed with strapping tape and plastic film.
9.2 Can packaging
Cans are packed in pallets. The number of packaging cans and the number of layers shall be agreed upon by the supply and financing parties. The layers shall be separated by neutral cardboard, and wrapped with strapping tape and plastic film.
10 Transportation
The means of transportation should be clean and dry, and no odor or pollution is allowed. During shipment, the product should be kept away from rain, sun exposure, moisture and damage. 11 Purchase and Storage
11.1 The product should be stored in a ventilated, dry and clean warehouse, away from direct sunlight. 11.2 Under normal storage conditions, the product shelf life is two years. 1513 Determination of internal coating volume
Test solution
2% (m/V) citric acid solution
0. 05% (m/V) sodium sulfide solution with 3% (V/V) acetic acid to adjust pH to 6. 0
2% (m/V) citric acid solution
Test conditions
100℃, 30min
121C, 30 min
121C, 30 min
The internal coating volume is measured by an electronic thickness gauge with an accuracy of 0.5 g/m2; it can also be measured according to the method specified in GB/T 8230. 6.12.4 Integrity test of external repair coating
Immerse the external repair coating of the weld in a solution of 20% copper sulfate and 10% hydrochloric acid. After 2 minutes, take out the sample and inspect it visually. 6.13 Easy-open end opening reliability test
Open the easy-open end that has been cured by hand or with a simple tool. 148
Inspection rules
GB/T 17590—1998
7.1 Product quality shall be sampled and inspected in accordance with the indicators and test methods specified in this standard and in accordance with Article 4.8.3 of GB/T2828—1987. 7.2 The quality department of the manufacturer shall inspect the products in accordance with the provisions of this standard and issue a certificate of conformity. 7.3 Factory inspection The products of the same variety and specification delivered in the same batch shall be the inspection batch. 7.4 The inspection of three-piece cans with easy-open ends is divided into factory inspection and type inspection. 7.4.1 Factory inspection
Main dimensions, sealing structure, corrosion resistance, inner coating and inner coating integrity are factory inspection items, and factory inspection shall be carried out according to the corresponding inspection methods.
7.4.2 Type inspection
7.4.2.1 Articles 5.1 to 5.4 of this standard are type inspection items. The inspection shall be carried out in accordance with the provisions and corresponding inspection methods listed in Tables 8, 9, 10, 11 and 12.
Table 8 Classification of appearance defects of easy-open lids and bottom lids
Easy-open lids and bottom lids
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Defects inside
Defects, broken glue, obvious oil stains on the inside of the lid, foreign matter pollution, metal exposure, coating film detachment or peeling Falling, serious wrinkles on the hook edge, easy to open lid without pull ring
Sealant pollution, partial lack of glue, obvious deformation of the hook edge, scratches and abrasions on the inner and outer coatings but no metal exposure, slight wrinkles and deformation on the hook edge, uneven overlap of sealant Table 9 Classification of can body appearance defects
Obvious oil stains, foreign matter pollution, metal exposure, cold welding, leakage welding, holes, breakdown, flange mouth, double curling, large collapsed edge, fast mouth
Obvious bubbles and burnt yellowing on the inner coating and inner patch coating, the maximum of the four marks on the can body is no more than 1 cm, and no damage to the inner coating is caused, obvious scratches, inverted printing pattern, inner printing color, incomplete curling, jump sealing, fragmentation, slight difference between the printing color and the sample, slight misalignment of the printing pattern, small scratches that do not expose the metal, overflow of curling glue, misalignment of welds, tailing exceeding 0.5 mm
Inspection items
Integrity of inner coating film
Easy to open cover, bottom cover
Breaking force
Full opening force
Opening reliability
Quality of dry film of sealant
Compressive strength
Sealing
Batch inspection level
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class C unqualified Grade
Class A unqualified
Class A unqualified
Qualified quality level
Inspection items
Double curling structure
Integrity of inner coating
Integrity of welding and subsequent coating
Compressive strength
Sealing
Easy to open end, bottom cover, tank body
Inspection level
Inspection items
Inner coating curing
Corrosion resistance
Inner coating quantity
Batch range
≥35001
35001~~500000
≥500 001
≥35 001~500 000
≥500001
GB/T17590—1998
Table 10 (Complete)
Batch inspection level
Non-conformity classification
Class A non-conformity
Batch range
≥35001
Qualified quality level
7.4.2.2 Type inspection should be carried out for products in any of the following situations. 150
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class B unqualified
Class A unqualified
Class A unqualified
Number of inspection samples
Number of samples
Qualified quality level
Judgment array|| tt||Determination array
GB/T17590—1998
a) New products or old products are converted to trial production and type identification; b) When the structure, material, process changes may affect the product performance; c) Normal production, inspection every six months; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection, to) When the national quality supervision agency proposes a type inspection requirement. 7.5 The user has the right to conduct inspections according to the provisions listed in Tables 6 to 10 or the order contract. After the product arrives at the user, the user should conduct acceptance. If the number of unqualified products exceeds the specified number, it can be rejected, but it is allowed to remove the defective products and submit them for acceptance again. The qualification level remains unchanged. If it is still unqualified, it is judged that the batch is unqualified. 8 Marking
8.1 The can body should have the manufacturer's mark. 8.2 The product packaging side should have a product inspection certificate and relevant marks, and the marks should comply with the provisions of GB191. The certificate of conformity shall have the manufacturer's mark and name, product name, product specifications, production number, production date, number, etc. 9 Packaging
Should meet the requirements of containerized transportation, the packaging materials should be clean and dry, and no odor or pollution is allowed. 9.1 Easy-open cover and bottom cover packaging
9.1.1 Easy-open cover and bottom cover are packed in neutral paper bags. 9.1.2 Easy-open cover and bottom cover are packed in cartons or pallets after bagging. The box mouth should be closed when packed in cartons. When packed in pallets, they are packed with strapping tape and plastic film.
9.2 Can packaging
Cans are packed in pallets. The number of packaging cans and the number of layers shall be agreed upon by the supply and financing parties. The layers shall be separated by neutral cardboard, and wrapped with strapping tape and plastic film.
10 Transportation
The means of transportation should be clean and dry, and no odor or pollution is allowed. During shipment, the product should be kept away from rain, sun exposure, moisture and damage. 11 Purchase and Storage
11.1 The product should be stored in a ventilated, dry and clean warehouse, away from direct sunlight. 11.2 Under normal storage conditions, the product shelf life is two years. 1513 Determination of internal coating volume
Test solution
2% (m/V) citric acid solution
0. 05% (m/V) sodium sulfide solution with 3% (V/V) acetic acid to adjust pH to 6. 0
2% (m/V) citric acid solution
Test conditions
100℃, 30min
121C, 30 min
121C, 30 min
The internal coating volume is measured by an electronic thickness gauge with an accuracy of 0.5 g/m2; it can also be measured according to the method specified in GB/T 8230. 6.12.4 Integrity test of external repair coating
Immerse the external repair coating of the weld in a solution of 20% copper sulfate and 10% hydrochloric acid. After 2 minutes, take out the sample and inspect it visually. 6.13 Easy-open end opening reliability test
Open the easy-open end that has been cured by hand or with a simple tool. 148
Inspection rules
GB/T 17590—1998
7.1 Product quality shall be sampled and inspected in accordance with the indicators and test methods specified in this standard and in accordance with Article 4.8.3 of GB/T2828—1987. 7.2 The quality department of the manufacturer shall inspect the products in accordance with the provisions of this standard and issue a certificate of conformity. 7.3 Factory inspection The products of the same variety and specification delivered in the same batch shall be the inspection batch. 7.4 The inspection of three-piece cans with easy-open ends is divided into factory inspection and type inspection. 7.4.1 Factory inspection
Main dimensions, sealing structure, corrosion resistance, inner coating and inner coating integrity are factory inspection items, and factory inspection shall be carried out according to the corresponding inspection methods.
7.4.2 Type inspection
7.4.2.1 Articles 5.1 to 5.4 of this standard are type inspection items. The inspection shall be carried out in accordance with the provisions and corresponding inspection methods listed in Tables 8, 9, 10, 11 and 12.
Table 8 Classification of appearance defects of easy-open lids and bottom lids
Easy-open lids and bottom lids
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Defects inside
Defects, broken glue, obvious oil stains on the inside of the lid, foreign matter pollution, metal exposure, coating film detachment or peeling Falling, serious wrinkles on the hook edge, easy to open lid without pull ring
Sealant pollution, partial lack of glue, obvious deformation of the hook edge, scratches and abrasions on the inner and outer coatings but no metal exposure, slight wrinkles and deformation on the hook edge, uneven overlap of sealant Table 9 Classification of can body appearance defects
Obvious oil stains, foreign matter pollution, metal exposure, cold welding, leakage welding, holes, breakdown, flange mouth, double curling, large collapsed edge, fast mouth
Obvious bubbles and burnt yellowing on the inner coating and inner patch coating, the maximum of the four marks on the can body is no more than 1 cm, and no damage to the inner coating is caused, obvious scratches, inverted printing pattern, inner printing color, incomplete curling, jump sealing, fragmentation, slight difference between the printing color and the sample, slight misalignment of the printing pattern, small scratches that do not expose the metal, overflow of curling glue, misalignment of welds, tailing exceeding 0.5 mm
Inspection items
Integrity of inner coating film
Easy to open cover, bottom cover
Breaking force
Full opening force
Opening reliability
Quality of dry film of sealant
Compressive strength
Sealing
Batch inspection level
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class C unqualified Grade
Class A unqualified
Class A unqualified
Qualified quality level
Inspection items
Double curling structure
Integrity of inner coating
Integrity of welding and subsequent coating
Compressive strength
Sealing
Easy to open end, bottom cover, tank body
Inspection level
Inspection items
Inner coating curing
Corrosion resistance
Inner coating quantity
Batch range
≥35001
35001~~500000
≥500 001
≥35 001~500 000
≥500001
GB/T17590—1998
Table 10 (Complete)
Batch inspection level
Non-conformity classification
Class A non-conformity
Batch range
≥35001
Qualified quality level
7.4.2.2 Type inspection should be carried out for products in any of the following situations. 150
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class B unqualified
Class A unqualified
Class A unqualified
Number of inspection samples
Number of samples
Qualified quality level
Judgment array|| tt||Determination array
GB/T17590—1998
a) New products or old products are converted to trial production and type identification; b) When the structure, material, process changes may affect the product performance; c) Normal production, inspection every six months; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection, to) When the national quality supervision agency proposes a type inspection requirement. 7.5 The user has the right to conduct inspections according to the provisions listed in Tables 6 to 10 or the order contract. After the product arrives at the user, the user should conduct acceptance. If the number of unqualified products exceeds the specified number, it can be rejected, but it is allowed to remove the defective products and submit them for acceptance again. The qualification level remains unchanged. If it is still unqualified, it is judged that the batch is unqualified. 8 Marking
8.1 The can body should have the manufacturer's mark. 8.2 The product packaging side should have a product inspection certificate and relevant marks, and the marks should comply with the provisions of GB191. The certificate of conformity shall have the manufacturer's mark and name, product name, product specifications, production number, production date, number, etc. 9 Packaging
Should meet the requirements of containerized transportation, the packaging materials should be clean and dry, and no odor or pollution is allowed. 9.1 Easy-open cover and bottom cover packaging
9.1.1 Easy-open cover and bottom cover are packed in neutral paper bags. 9.1.2 Easy-open cover and bottom cover are packed in cartons or pallets after bagging. The box mouth should be closed when packed in cartons. When packed in pallets, they are packed with strapping tape and plastic film.
9.2 Can packaging
Cans are packed in pallets. The number of packaging cans and the number of layers shall be agreed upon by the supply and financing parties. The layers shall be separated by neutral cardboard, and wrapped with strapping tape and plastic film.
10 Transportation
The means of transportation should be clean and dry, and no odor or pollution is allowed. During shipment, the product should be kept away from rain, sun exposure, moisture and damage. 11 Purchase and Storage
11.1 The product should be stored in a ventilated, dry and clean warehouse, away from direct sunlight. 11.2 Under normal storage conditions, the product shelf life is two years. 1514 Inspection of three-piece cans with easy-open ends is divided into factory inspection and type inspection. 7.4.1 Factory inspection
Main dimensions, sealing structure, corrosion resistance, inner coating and inner coating integrity are factory inspection items, and factory inspection is carried out according to the corresponding inspection methods.
7.4.2 Type inspection
7.4.2.1 Articles 5.1 to 5.4 of this standard are type inspection items, and the inspection should be carried out according to the provisions and corresponding inspection methods listed in Tables 8, 9, 10, 11 and 12.
Table 8 Classification of appearance defects of easy-open lid and bottom cover
Easy-open lid and bottom cover
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Defects inside
Defects, broken glue, obvious oil stains on the inside of the lid, foreign matter pollution, metal exposure, coating film detachment or peeling Falling, serious wrinkles on the hook edge, easy to open lid without pull ring
Sealant pollution, partial lack of glue, obvious deformation of the hook edge, scratches and abrasions on the inner and outer coatings but no metal exposure, slight wrinkles and deformation on the hook edge, uneven overlap of sealant Table 9 Classification of can body appearance defects
Obvious oil stains, foreign matter pollution, metal exposure, cold welding, leakage welding, holes, breakdown, flange mouth, double curling, large collapsed edge, fast mouth
Obvious bubbles and burnt yellowing on the inner coating and inner patch coating, the maximum of the four marks on the can body is no more than 1 cm, and no damage to the inner coating is caused, obvious scratches, inverted printing pattern, inner printing color, incomplete curling, jump sealing, fragmentation, slight difference between the printing color and the sample, slight misalignment of the printing pattern, small scratches that do not expose the metal, overflow of curling glue, misalignment of welds, tailing exceeding 0.5 mm
Inspection items
Integrity of inner coating film
Easy to open cover, bottom cover
Breaking force
Full opening force
Opening reliability
Quality of dry film of sealant
Compressive strength
Sealing
Batch inspection level
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class C unqualified Grade
Class A unqualified
Class A unqualified
Qualified quality level
Inspection items
Double curling structure
Integrity of inner coating
Integrity of welding and subsequent coatingbZxz.net
Compressive strength
Sealing
Easy to open end, bottom cover, tank body
Inspection level
Inspection items
Inner coating curing
Corrosion resistance
Inner coating quantity
Batch range
≥35001
35001~~500000
≥500 001
≥35 001~500 000
≥500001
GB/T17590—1998
Table 10 (Complete)
Batch inspection level
Non-conformity classification
Class A non-conformity
Batch range
≥35001
Qualified quality level
7.4.2.2 Type inspection should be carried out for products in any of the following situations. 150
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Class C unqualified
Class B unqualified
Class A unqualified
Class A unqualified
Number of inspection samples
Number of samples
Qualified quality level
Judgment array|| tt||Determination array
GB/T17590—1998
a) New products or old products are converted to trial production and type identification; b) When the structure, material, process changes may affect the product performance; c) Normal production, inspection every six months; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection, to) When the national quality supervision agency proposes a type inspection requirement. 7.5 The user has the right to conduct inspections according to the provisions listed in Tables 6 to 10 or the order contract. After the product arrives at the user, the user should conduct acceptance. If the number of unqualified products exceeds the specified number, it can be rejected, but it is allowed to remove the defective products and submit them for acceptance again. The qualification level remains unchanged. If it is still unqualified, it is judged that the batch is unqualified. 8 Marking
8.1 The can body should have the manufacturer's mark. 8.2 The product packaging side should have a product inspection certificate and relevant marks, and the marks should comply with the provisions of GB191. The certificate of conformity shall have the manufacturer's mark and name, product name, product specifications, production number, production date, number, etc. 9 Packaging
Should meet the requirements of containerized transportation, the packaging materials should be clean and dry, and no odor or pollution is allowed. 9.1 Easy-open cover and bottom cover packaging
9.1.1 Easy-open cover and bottom cover are packed in neutral paper bags. 9.1.2 Easy-open cover and bottom cover are packed in cartons or pallets after bagging. The box mouth should be closed when packed in cartons. When packed in pallets, they are packed with strapping tape and plastic film.
9.2 Can packaging
Cans are packed in pallets. The number of packaging cans and the number of layers shall be agreed upon by the supply and financing parties. The layers shall be separated by neutral cardboard, and wrapped with strapping tape and plastic film.
10 Transportation
The means of transportation should be clean and dry, and no odor or pollution is allowed. During shipment, the product should be kept away from rain, sun exposure, m
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