GB/T 40716-2021 PDF EnglishUS$125.00 · In stock · Download in 9 seconds
GB/T 40716-2021: Test method for air retention of motor vehicle tyres 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 standardsGB/T 40716-2021: Test method for air retention of motor vehicle tyres---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/GBT40716-2021GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.160.10 CCS G 41 Test method for air retention of motor vehicle tyres ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: MAY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of the PRC. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Test equipment ... 5 5 Test conditions ... 5 6 Test procedure ... 6 7 Data processing ... 7 8 Test report ... 9 Test method for air retention of motor vehicle tyres1 ScopeThis document specifies the test method for air retention of motor vehicle tyres under static conditions, including test equipment, test conditions, test procedure, data processing, and test report. This document is applicable to the air retention test of tubeless passenger car tyres and truck tyres.2 Normative referencesThe contents of the following documents, through normative references in this text, constitute indispensable provisions of this document. Among them, for dated references, only the edition corresponding to that date applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 2977 Size designation, dimensions, inflation pressure and load capacity for truck tyres GB/T 2978 Size designation, dimensions, inflation pressure and load capacity for passenger car tyres GB/T 6326 Tyre terms and definitions HG/T 2177 Appearance quality of tyres3 Terms and definitionsThe terms and definitions defined in GB/T 6326 and the following ones apply to this document. 3.1 Inflation pressure loss rate The rate of change of the inflation pressure after revision, which is obtained from the slope of the linear part fitted by the logarithm value of inflation pressure and the time curve. and the rim (both sides), to ensure that there is no air leakage. 6.1.3 Connect the atmospheric pressure sensor and adapter to the valve stem. Check the tyre-rim assembly and the adapter (including the connection part with the sensor), to ensure that the accessories are not leaking. 6.1.4 After checking according to 6.1.2 and 6.1.3, park the tyre-rim assembly at the test temperature for 48 h (the temporarily-used spare tyre shall be parked for more than 48 h). If the inflation pressure drops more than 3 kPa during the period, follow 6.1.2 again. If necessary, reassemble the tyre and rim. 6.2 Test steps 6.2.1 Put the two test tyres prepared in accordance with 6.1 in a temperature- controllable environment; adjust the atmospheric pressure to the test inflation pressure; start the test; and ensure free air circulation. During the test, the tyre shall not be moved to avoid pressure fluctuations. 6.2.2 Continue to check and record the inflation pressure, ambient temperature, and atmospheric pressure every day. If the revised slope value changes abnormally, check again for leaks. 6.2.3 After 14 days of the test, if the difference between the inflation pressures of the two test tyres does not exceed 6 kPa, the test continues. Otherwise, recheck according to 6.1.2 and restart the test. 6.2.4 Continue the test according to the standard until the end of the test period. During the test, continue to monitor and evaluate the data results.7 Data processing7.1 According to formula (1), obtain the revised inflation pressure. Where: p - Revised inflation pressure, in kilopascals (kPa); p1 - Test inflation pressure, in kilopascals (kPa); B1 - Atmospheric pressure during the test, in kilopascals (kPa); B2 - Reference atmospheric pressure 101.3 kPa; T1 - Test temperature, in Kelvin (K); ......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 40716-2021 be delivered?Answer: The full copy PDF of English version of GB/T 40716-2021 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 40716-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 40716-2021_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 -- GB/T 40716-2021 -- 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 GB/T 40716-2021?A step-by-step guide to download PDF of GB/T 40716-2021_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 "GB/T 40716-2021". 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 |
