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GB/T 14251-2017: General technical standard for metal container of canned food Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 14251: Historical versions
Similar standardsGB/T 14251-2017: General technical standard for metal container of canned food---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14251-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 67.250 A 82 Replacing GB/T 14251-1993 General technical standard for metal container of canned food Issued on. SEPTEMBER 07, 2017 Implemented on. OCTOBER 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Product classification... 19 5 Quality requirements... 20 6 Food safety requirements... 25 7 Test method... 25 8 Inspection rules... 34 9 Marking, packaging, transportation, storage... 39 Appendix A (Normative) Quality requirements for pure copper wire used for welding canned metal containers... 41 Appendix B (Informative) Calculation method and table look-up method of overlap length and overlap percent... 431 ScopeThis standard specifies the terms and definitions, product classification, quality requirements, food safety requirements, test methods, inspection rules, markings, packaging, transportation, storage requirements for metal container of canned food. This standard applies to empty cans and full cans for canned food, which are made of tin-plated or chrome-plated sheet steel or aluminum alloy sheet.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Laminated steel A composite material, which is formed by laminating a layer of polymer film on the surface of tin-plated or chrome-plated steel sheet, by melting method or adhesive method; has dual properties of polymer material and metal material. 3.2 Laminated aluminum A composite material, which is formed by laminating a layer of polymer film on the surface of aluminum alloy sheet, by melting method or adhesive method; has dual properties of polymer material and metal material. 3.3 Can body A container, which is formed by combining a metal can body with a top cover or a bottom cover, OR punching and drawing a whole piece of metal sheet. 3.4 Three-piece can A packaging container, which is made up of three pieces of material, combined with a metal top cover, a can body, a bottom cover. 3.5 Two-piece can A container, which is formed by the can body, whose bottom and body are made of a whole piece of metal sheet, through punching and drawing, THEN, sealed by a metal top cover.4 Product classification4.1 According to the type of substrate, it can be divided into tin-plated thin steel cans, chrome-plated thin steel cans, aluminum alloy thin-steel cans. 4.2 According to the characteristics of the inner wall of the can body, it is divided into plain tinplate cans, coated steel cans, coated aluminum cans, laminated steel cans, laminated aluminum cans. 4.3 According to the container structure, it is divided into three-piece cans and two-piece cans. 4.5 According to the shape of the can body, it is divided into straight-wall can, tapered can, necked-in can, expanding can, beaded can, expanded can, etc. 4.6 According to the opening method, it is divided into easy open end cans, easy peelable end cans, flat-bottom end cans, key open cans.5 Quality requirements5.1 Requirements for raw and auxiliary materials 5.2 Quality of empty cans and ends 5.2.1 Appearance quality 5.2.2 Weld quality 5.2.2.1 The welding seam is flat and smooth. The lap joint is even and consistent. The soldering joints are evenly connected. There shall be no cold welding, missing welding, pin holes, puncture. There shall be no obvious corrosion and splash. 5.2.3 Quality of stripe 5.2.3.1 The stripe of weld shall be smooth and uniform, which completely covers the weld and the uncoated part. There shall be no large blisters, browning, exposed tinplate points. The liquid stripe shall not have splash points. 5.2.4 Seam quality 5.2.4.1 The seam shall be complete AND free from obvious scratches, corrosion, internal squeezing of compound, external squeezing of compound. 5.2.5 Sealing performance The can shall have no leakage, after the pressurization test or the decompression test. 5.2.6 Compressive strength After the compressive strength test, the can body and can cover shall have no permanent deformation. The compressive strength of different can types shall meet the requirements of Table 3. 5.2.7 Coating performance 5.2.7.5 Salt resistance After the test, there shall be no intensive corrosion points on the inner wall of the can body and can cover. The inner coating shall be free of whitening, peeling off, shedding, blistering. 5.3.2 Quality of inner wall of can 5.3.2.1 Inner wall of plain tinplate can There is free from obvious oxidation circle, pitting, abnormally rapid detinning, perforation, leaked can, swelled can, internal squeezing of compound.6 Food safety requirementsIt shall meet the requirements of the corresponding national food safety standards.7 Test method7.1 Appearance, weld, seam 7.1.1 Instruments and equipment 7.1.2 Test procedure 7.1.2.1 Appearance Visually inspect the appearance quality of the container. 7.1.2.2 Weld 7.1.2.3 Seam 7.1.2.3.1 Detection location The detection of the outside of the seam and the seam structure is carried out according to the sampling, as shown in Figure 17. 7.1.2.3.4 Tightness rating (TR) Use pliers, to pull off the cover of the can, along the edge of the can. Gently knock off the entire circle of the cover hook. Observe the wrinkle state of the cover hook. The degree of sagging of the cover hook, at the seam, AND the indentation of the can body are measured, as shown in Figure 10 in 3.44.The tightness rating and the wrinkle rating have a corresponding relationship, as shown in formula (2). 7.2 Stripe 7.2.1 Instruments and equipment 7.2.3 Test procedure 7.2.3.1 Appearance Visual test. 7.2.3.2 Curability Add water to the can, until the liquid level is about 3 mm away from the can opening. Seal it. Put the sample into the cooking container. Determine the heating temperature and time, according to the sterilization process of the content. Take out the sample after heating. Place it in tap water to cool it. Open the can. Pour out the water. Visually inspect the stripe. 7.3 Compressive strength 7.3.1 Instruments and equipment. The division value of the compressive strength tester shall not be greater than 10 kPa. 7.3.2 Compressive strength. Slowly raise the pressure on the can to the corresponding value. Keep the pressure for 2 minutes. Observe it visually. 7.4 Tightness 7.4.1 Instruments and equipment Can tightness tester. 7.6 Sealant performance 7.6.1 Instruments and equipment Analytical balance. The accuracy is 0.001 g. 7.6.2 Test procedure 7.6.2.1 Water resistance of sealant Put the sample cover into a glass container, which is filled with water. The water level is about 50 mm above the sample cover. Put the glass container into the pressure cooker. 7.6.2.2 Moisture content of sealant Take the sealant off the scale. Record the mass as m1.Put it in an oven at 125 °C for 30 min, to make it reach to constant weight. Record the mass, after taking out, as m2.The moisture content of the sealant is calculated according to formula (5).8 Inspection rules8.1 The inspection shall be carried out according to the batch or group of goods. The product of the same specification delivered at one time is a batch. 8.2 Product inspection includes exit-factory inspection and type inspection items. 8.3 The ex-factory inspection items include appearance, weld, stripe, seam, sealing performance, compressive strength, enamel rate value, sealant performance. Type inspection items are all indicators specified by the standard. 8.4 Type inspection shall be carried out, when the product has one of the following conditions. 8.5 See Table 5 and Table 6 for classification of nonconformances.9 Marking, packaging, transportation, storage9.1 Marking The outer packaging of the product shall have a product inspection certificate and a packing list; the content shall include the manufacturer's mark and name, product name, product specification, production number, production date, quantity. 9.2 Packaging 9.3 Transportation Transportation and handling tools shall be clean and dry; it is not allowed for peculiar smell or pollution. Avoid rain, sun exposure, dampness and damage during shipment. 9.4 Storage 9.4.1 The product shall be stored in a ventilated, dry, clean warehouse; avoid direct exposure to sunlight. 9.4.2 Under normal storage conditions, the shelf life of low-chromium iron empty cans is 6 months; the shelf life of other empty cans AND ends is two years. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 14251-2017 be delivered?Answer: The full copy PDF of English version of GB/T 14251-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 14251-2017_English with my colleagues?Answer: Yes. 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