GB/T 41318-2022 English PDFUS$519.00 ยท In stock
Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 41318-2022: Ventilation silencer Status: Valid
Basic dataStandard ID: GB/T 41318-2022 (GB/T41318-2022)Description (Translated English): Ventilation silencer Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: P48 Word Count Estimation: 26,236 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 41318-2022: Ventilation silencer---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Ventilation silencer ICS 91.140.30 CCSP48 National Standards of People's Republic of China Ventilation muffler Published on 2022-03-09 2022-10-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Classification and Labeling 4 5 General requirements5 6 requirements 6 7 Test methods 11 8 Inspection rules 13 9 Marking, packaging, transportation and storage 14 Appendix A (Informative) Comparison of Three A-Weighted Insertion Loss Calculation Methods and Results for Ventilation Mufflers 16 Appendix B (Informative) Example of Construction of Ventilation Muffler 18 Appendix C (normative) Test method for air leakage per unit area of ventilation muffler 20 Appendix D (normative) Test method for high temperature resistance of ventilation muffler 22 forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China. This document is under the jurisdiction of the National Standardization Technical Committee for HVAC and Purification Equipment (SAC/TC143). This document is drafted by. China Academy of Building Research Co., Ltd., Shenzhen Zhongya Electromechanical Industry Co., Ltd., Jianke Environmental Energy Technology Co., Ltd. Company, Guangdong Academy of Building Research Group Co., Ltd., Beijing Labor Protection Research Institute, National Air Conditioning Equipment Quality Supervision Inspection Center, Beijing Lvchuang Acoustic Engineering Co., Ltd., Tsinghua University, China Machinery Zhonglian Engineering Co., Ltd., Xi'an University of Architecture and Technology, China Beihai Research Station, Institute of Acoustics, Chinese Academy of Sciences, Hunan University, Shanghai Xinhuajing Environmental Protection Engineering Co., Ltd., Shandong Great Group Co., Ltd., Dezhou Longda Air Conditioning Equipment Co., Ltd., Beijing Wanxunda Acoustic Equipment Co., Ltd., Beijing Yufeng Hongli Air Conditioning Equipment Co., Ltd., Jiangsu Hua Dongzhengda Air Conditioning Equipment Co., Ltd., Zhengsheng Environmental Technology Co., Ltd., Jiangsu Kaier Air Conditioning Equipment Manufacturing Co., Ltd., Jingjiang Moxibustion Ventilation Equipment Co., Ltd., Shenzhen Luosai Acoustic Technology Co., Ltd., Jiangsu Fengshen Air Conditioning Group Co., Ltd., Sichuan Haiyan Acoustic Technology Co., Ltd., Owens Corning (China) Investment Co., Ltd., Guangxi Wanxiang Engineering Quality Inspection Co., Ltd. The main drafters of this document. Yan Guojun, Fang Qingchuan, Xu Chun, Zhou Quan, Hu Wencheng, Lin Jie, Wu Weibin, Jiang Zhaoxu, Xue Xiaoyan, Yang Fangyi, Liu Qing, Zhao Dan, Li Angui, Wang Gaoyi, Tian Zhen, Su Hongbing, Wang Zhijun, Yin Zhipeng, Zhang Yulin, Wang Jicheng, Zheng Chunxia, Zhang Xiaojie, Wang Chao, Miao Dong, Liu Tao, Huang Jian, Zhou Yuanbo, Zhang Zhi, You Yihong, Jiang Tao, Zhao Qiyuan, Yang Qiang, Mai Huiting, Zhang Changjia, Li Like, Wu Shaozhong, Liu Qingyun, Wan Ming. Ventilation muffler1 ScopeThis document specifies the classification and marking, general requirements, requirements, test methods, inspection rules, marking, packaging, transportation and storage. This document applies to the production and inspection of various types of resistive and resistive mufflers used in ventilation and air-conditioning system engineering. Muffler elbows, muffler plenums and exhaust bleed mufflers.2 Normative referencesThe contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 2518 Continuous hot-dip galvanized and zinc alloy coated steel sheets and strips GB/T 2624 (all parts) Measurement of full-pipe fluid flow with differential pressure devices installed in pipes of circular cross-section GB/T 3947 Acoustic terminology GB/T 9978.1-2008 Test method for fire resistance of building components - Part 1.General requirements GB 15930-2007 Fire dampers for building ventilation and smoke exhaust systems GB/T 20431 Guidelines for Noise Control of Acoustic Mufflers GB/T 25516-2010 Laboratory measurement methods for acoustic duct mufflers and air duct end units Insertion loss, airflow noise and total pressure loss GB/T 32379-2015 Determination of formaldehyde emission from mineral wool and its products GB 50243-2016 Code for acceptance of construction quality of ventilation and air-conditioning engineering QB/T 2443 steel tape measure3 Terms and DefinitionsThe terms and definitions defined in GB/T 3947 and the following apply to this document. 3.1 It is installed in the ventilation and air-conditioning system, which not only allows the air flow to pass through, but also effectively suppresses the propagation of noise along the air flow channel. 3.2 Resistive muffler dissipativesilencer;absorptivesilencer Ventilation mufflers that absorb sound energy using resistive sound-absorbing materials. Note. In this document, the performance requirements of impedance composite mufflers are consistent with those of resistive mufflers, and are not classified separately. 3.3 Reactive muffler reactivesilencer No resistive sound-absorbing materials are used, and the reflection and resonance of sound waves can be used through the sudden change of the pipe section or the resonance sound-absorbing structure inside the muffler. And other principles, the ventilation muffler that hinders the transmission of sound energy. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 41318-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 41318-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 3 ~ 5 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 41318-2022_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 41318-2022_English will be deemed to be sold to your employer/organization who actually pays 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. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay. |
