JC/T 977-2005 PDF EnglishUS$160.00 · In stock · Download in 9 seconds
JC/T 977-2005: Chemically strengthened glass Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsJC/T 977-2005: Chemically strengthened glass---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/JCT977-2005JC BUILDING MATERIALS INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 81.040.20 Q 33 Record No.. 15249-2005 Chemically strengthened glass Issued on: FEBRUARY 14, 2005 Implemented on: JULY 1, 2005 Issued by. National Development and Reform Commission Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Classification and marks... 5 5 Technical requirements ... 5 6 Test methods ... 11 7 Inspection rules ... 15 8 Package, marks, transport and storage ... 17 Appendix A ... 18 Appendix B ... 21ForewordThis Standard was modified on the basis of European standard EN 12337- 1.2000 Glass in Building - Chemically Strengthened Soda Lime Silicate Glass - Part 1. Definition and Description. Compared with EN 12337-1.2000, the main technical differences are as follows. - Deleted measurement method for squareness of planar rectangular products; added requirements for diagonal difference; - Added requirements and measurement methods for surface stress and compressive stress layer depth by referring to ASTM C1422-99 Standard Specification for Chemically Strengthened Flat Glass. Appendix A of this Standard is normative. Appendix B is informative. This Standard was proposed by China Building Materials Industry Association. This Standard shall be under the jurisdiction of National Technical Committee on Building Glass of Standardization Administration of China. Main drafting organization of this Standard. Glass Science Institute of China Building Materials Academy. Drafting organizations of this Standard. China Southern Glass Technology Holdings (Group) Co., Ltd., Beijing Gelin Jingfeng Fireproof Glass Co., Ltd.. Main drafters of this Standard. Yang Jianjun, Wang Rui, Gong Shuyi, Zhang Baojun, Xiong Wei, Song Li, Shi Xinyong, Mo Jiao, Wu Huiting, Hu Yue. This Standard was issued for the first time. Chemically strengthened glass1 ScopeThis Standard specifies the term and definition, classification and marks, technical requirements, test methods, inspection rules, package, marks, transport and storage of chemically strengthened glass. This Standard is applicable to flat chemically strengthened glass.2 Normative referencesThe following standards contain the provisions which, through reference in this Standard, constitute the provisions of this Standard. For dated references, subsequent amendments (excluding corrections) or revisions do not apply to this Standard. However, the parties who enter into agreement based on this Standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this Standard. GB/T 1216 Micrometers GB/T 5137.1-2002 Test Methods of Safety Glazing Materials Used on Road Vehicle GB 11614-1999 Float glass GB/T 18144 Test method for measurement of stress in glass JB/T 8788 Feeler gauges3 Terms and definitionsThe following terms and definitions apply to this document. Chemically strengthened glass Glass of which alkali metal ions of glass surface are replaced by other alkali metal ions in molten salt, so as to improve mechanical strength. Stain trace, smog There shall be no obvious stain trace, smog on the surface of chemically tempered glass. 5.6 Edge and hole machining quality 5.6.1 Edge machining quality of chemically tempered glass The edge of chemically tempered glass used in construction shall be chamfered and fine grinded. The edge quality of chemically tempered glass used for non- construction shall be determined by the seller and the buyer. 5.6.2 Hole edge machining quality Hole edge machining quality shall be determined by the seller and the buyer. 5.6.2.1 The tolerance of hole aperture of chemically tempered glass products used for construction shall comply with provisions of Table 6. This provision only applies to the glass of which nominal thickness is not less than 4 mm. The tolerance of hole aperture of chemically tempered glass used for non- construction shall be determined by the seller and the buyer. Table 6 Hole aperture and its tolerance unit. mm Nominal hole aperture (D) Tolerance D< 4 Determined by the seller and the buyer 4≤D≤20 ±1.0 20< D≤100 ±2.0 D >100 Determined by the seller and the buyer 5.6.2.2 The distance a BETWEEN hole edge of chemically tempered glass products used for construction AND glass edge shall not be less than twice glass nominal thickness d, as shown in Figure 1. The distance b between two hole edges shall not be less than twice glass nominal thickness d, as shown in Figure 2. The distance c BETWEEN hole edge AND glass corner shall not be less than 6 times glass nominal thickness d, as shown in Figure 3. The hole center position shall expressed by referring to Figure 4. build coordinate system as Figure 4 and use hole center position’s coordinates (x, y) to show hole center position. Since the tolerance of hole center position x, y is same with tolerance of glass side length (see Table 3), this provision is only applicable to glass products of which nominal thickness is not less than 4 mm and the holes of whole glass plate do not exceed 4. Hole position requirements for chemically tempered glass products used for non-construction shall be determined by the seller and the buyer. Category B 25< d≤50 Category C d >50 5.12 Impact resistance Impact resistance of chemically tempered glass shall comply with provisions of Table 10. Table 10 Impact resistance of chemically tempered glass Glass thickness d mm Impact height m State after impact d< 2 1.0 The specimen must not be destroyed. d≥2 2.06 Test methods6.1 Thickness determination Use micrometer that complies with provisions of GB/T 1216, of which the accuracy is 0.01 mm, or instrument of same accuracy to measure at quadrilateral midpoint within 15 mm from glass plate edge. The arithmetic mean of measurement results shall be its thickness value. Round it to one decimal place. 6.2 Size determination Use steel tape of which the minimum graduation is 1 mm to measure. 6.3 Diagonal difference Use steel tape of which the minimum graduation is 1 mm to measure. 6.4 Appearance quality Inspect in accordance with requirements of 5.3 in GB 11614-1999. 6.5 Edge and hole machining quality Use caliper of which the minimum graduation is 0.1 mm to measure. 6.6 Curvature determination Place the specimen at room temperature for more than 4h. When measuring, make the specimen perpendicular and pad with two pads at 1/4 place under its long side. Use a ruler or wire level closely against two sides of specimen or stress. 7.1.2 Type inspection Inspection items are all technical requirements stipulated by this Standard. In case one of the following situation, type inspection shall be conducted. a) trial type identification of new product or old product transferring production; b) after trial production, when there are major changes in structure, material, process etc. which may affect product performance; c) when normal production reaches one year; d) when production resumes after the production is shutdown for more than six months; e) when there is significant difference between factory inspection results and previous type inspection; f) when type inspection requirements are requested by quality supervision department. 7.2 Batching and sampling 7.2.1 Batching Chemically tempered glasses, produced by same type of raw material under same process conditions, shall be grouped as a batch. 7.2.2 Sampling 7.2.2.1 Thickness, size, appearance quality, curvature, surface stress shall be randomly sampled according to Table 11. 7.2.2.2 For product’s technical requirements, if it uses product to inspect, random sampling shall be conducted from this batch of products according to the quantity required by inspection items. If it uses specimen to inspect, it shall use the specimen of same-material, same-thickness and prepared under same- process conditions as the products. 7.3 Determination rules If the number of rejects of any one of thickness, size, appearance quality, curvature and surface stress is greater than or equals to the number of rejects in Table 11, then this inspection item of this product shall be deemed as unqualified.Appendix A(Normative) Bending strength test method A.1 Test conditions Ambient temperature. 23°C±5°C. Ambient humidity. 40%~70%. To avoid thermal stress, during the whole process of test, the fluctuation of ambient temperature shall not be greater than 1°C. A.2 Specimen Take 12 pieces of specimens to conduct the test. The length of each specimen is 1100 mm ± 5 mm; the width is 360 mm ± 5 mm. When preparing specimen, cutting edges shall be on the same surface of the specimen. Within... ......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 JC/T 977-2005 be delivered?Answer: The full copy PDF of English version of JC/T 977-2005 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 JC/T 977-2005_English with my colleagues?Answer: Yes. The purchased PDF of JC/T 977-2005_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- JC/T 977-2005 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of JC/T 977-2005?A step-by-step guide to download PDF of JC/T 977-2005_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "JC/T 977-2005". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
