GB/T 20936.1-2022 English PDFUS$749.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 20936.1-2022: Gas detectors for explosive atmospheres - Part 1: Performance requirements of detectors for flammable gases Status: Valid GB/T 20936.1: Historical versions
Basic dataStandard ID: GB/T 20936.1-2022 (GB/T20936.1-2022)Description (Translated English): Gas detectors for explosive atmospheres - Part 1: Performance requirements of detectors for flammable gases Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K35 Classification of International Standard: 29.260.20 Word Count Estimation: 38,398 Date of Issue: 2022-12-30 Date of Implementation: 2023-07-01 Older Standard (superseded by this standard): GB/T 20936.1-2017 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 20936.1-2022: Gas detectors for explosive atmospheres - Part 1: Performance requirements of detectors for flammable gases---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. ICS 29.260.20 CCSK35 National Standards of People's Republic of China Replace GB/T 20936.1-2017 Gas detectors for explosive atmospheres Part 1.Performance requirements for combustible gas detectors forflammablegases, MOD) Released on 2022-12-30 and implemented on 2023-07-01 State Administration for Market Regulation Released by the National Standardization Management Committee table of contentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 3.1 Gas properties 2 3.2 Detector Type 3 3.3 Sensor 4 3.4 Sampling components 4 3.5 Signals and Alarms 5 3.6 Time 5 3.7 Others 6 4 General requirements 6 4.1 General 6 4.2 Structure 7 4.3 Sign 11 4.4 User Manual 11 5 trials 12 5.1 Overview 12 5.2 General requirements for testing 12 5.3 Normal test conditions 14 5.4 Test method 16 Appendix A (Normative) Performance Requirements 24 Appendix B (informative) Determination of response time 29 Reference 31forewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. This document is Part 1 of GB/T 20936 "Gas Detectors for Explosive Atmospheres". GB/T 20936 has issued the following part. --- Part 1.Performance requirements for combustible gas detectors; --- Part 2.Selection, installation, use and maintenance of combustible gas and oxygen detectors; --- Part 3.Guidelines for functional safety of fixed gas detection systems; --- Part 4.Performance requirements for open path combustible gas detectors. This document replaces GB/T 20936.1-2017 "Gas detectors for explosive atmospheres - Part 1.Performance requirements for combustible gas detectors" Compared with GB/T 20936.1-2017, except for structural adjustment and editorial changes, the main technical changes are as follows. --- Added failure effects that do not adversely affect safety-related functions (see 4.2.1); --- Increased the visual and auditory indication of portable equipment (see 4.2.2.1); --- Increased the functional limit of display value drop and measured value below zero (4.2.2.5); --- Added requirements for fault indication, sensor disconnection and zero drift conditions below the minimum supply voltage fault limit (see 4.2.4); --- Added zero and sensitivity adjustment requirements (see 4.2.5); --- Added the requirements contained in the instruction manual (see 4.4); --- Added the test gas (methane, propane or butane) required for general-purpose gas detectors (see 5.3.2); --- Changed the selection of calibration measurement points (see 5.4.3.2, 5.4.3.2 of the.2017 edition); --- Increased the requirements for the response of semiconductor and catalytic sensors to different gases when exposed to high gas concentrations (see 5.4.3.3); --- Increased temperature range and stabilization period (see 5.4.6); --- Added the requirement for the device to prompt the user (see 5.4.14); --- Added requirements for output functions higher than the minimum supply voltage fault limit (see 5.4.18); --- Added the test methods and requirements of the electromagnetic compatibility test (see 5.4.21). This document is modified to adopt IEC 60079-29-1.2016 "Explosive Atmospheres Part 29-1.Gas Detectors Combustible Gas Detectors Performance Requirements". The technical differences between this document and IEC 60079-29-1.2016 and their reasons are as follows. --- Replaced IEC 60079-0 (see Chapter 3) with the normatively quoted GB/T 3836.1 to adapt to my country's technical conditions, increase Operability; --- Replaced ISO /IEC 80079-20-1 (see 5.2.1) with the normatively quoted GB/T 3836.11 to adapt to my country's technical regulations components, increase operability; --- Replaced IEC 60068-2-6 (see 5.4.12.1 and 5.4.12.2.1) with the normatively quoted GB/T 2423.10 to adapt to our country Technical conditions, increase operability; --- In 5.4.18 voltage fluctuation test, change "rated voltage 115% and 80%" to "rated voltage 115% and 75%" to Specific conditions suitable for Class I equipment; --- Replaced IEC 61326-1.2012 (see 5.4.21.1 and 5.4.21.2) with the normatively referenced GB/T 18268.1 to suit I The country's technical conditions, increase operability. The following editorial changes have been made to this document. --- In order to coordinate with existing standards, change the name of the standard to "Gas Detectors for Explosive Atmospheres Part 1.Combustible Gas Detectors Performance Requirements"; ---Modified the Note 1 on Class I detectors in the scope; ---In 5.3.6, 5.3.7 and 5.3.8, examples of test temperature, pressure and humidity of coal mine underground products have been added; --- Incorporates the content of the IEC 60079-29-1.2016/AMD1.2020 amendment, the outer margin position of the terms involved marked with a vertical double line (‖); --- Replaced the informative reference IEC 60050-426 with GB/T 2900.35, and moved it from Chapter 2 to References; --- Replaced the informative referenced international documents with Chinese documents, and revised the references. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Standardization Technical Committee for Explosion-proof Electrical Equipment (SAC/TC9). This document is drafted by. Nanyang Explosion-proof Electric Research Institute Co., Ltd., Harbin Institute of Technology, Hanwei Technology Group Co., Ltd., Shanghai Instrument and Meter Automatic Control System Inspection and Testing Institute Co., Ltd., CNOOC Tianjin Chemical Research and Design Institute Co., Ltd., Shenzhen Tean Electronics Co., Ltd. Co., Ltd., China University of Mining and Technology, Chongqing Guotan Gas Co., Ltd. The main drafters of this document. Zhang Gang, Sun Jinwei, Wang Junfeng, Song Yanyong, Yin Hong, Xu Changhong, Tang Shoufeng, Shu Ganzhen, Yuan Wenzheng. The release status of previous versions of this document and the documents it replaces are as follows. ---First published as GB 20936.1-2007 in.2007; ---The first revision in.2017 was GB/T 20936.1-2017, which was incorporated into GB 20936.2-2009, Contents of GB/T 20936.3-2009 and GB 20936.4-2008; --- This is the second revision.IntroductionGB/T 20936 "Gas Detectors for Explosive Atmospheres" aims to establish the basic requirements for the performance of various combustible gas detectors, and to provide Guidance for application, in the form of a sub-standard, includes the following parts. --- Part 1.Performance requirements for combustible gas detectors; --- Part 2.Selection, installation, use and maintenance of combustible gas and oxygen detectors; --- Part 3.Guidelines for functional safety of fixed gas detection systems; --- Part 4.Performance requirements for open path combustible gas detectors. From.2007 to.2009, my country adopted the IEC 61779 series to formulate GB 20936 "Electrical Equipment for Combustible Gas Detection". It is divided into 4 parts, respectively specifying the general requirements and test methods, as well as the performance requirements of Class I and Class II detectors with different measurement ranges. In.2017, my country adopted the IEC 60079-29 series and released the new GB/T 20936 "Gas Detectors for Explosive Atmospheres", of which GB/T 20936.1 mainly integrates the original Part 2~Part 4 based on the original Part 1, while GB/T 20936.2, GB/T 20936.3 and GB/T 20936.4 is a newly formulated part (only the original standard number is used). On the basis of adopting the main technical content of IEC 60079-29-1.2016, this revision has been appropriately modified to adapt to my country's specific situation. This document, as a standard for special explosion-proof equipment, is a supplement and modification to the general requirements of GB/T 3836.1. Gas detectors for explosive atmospheres Part 1.Performance requirements for combustible gas detectors1 ScopeThis document specifies portable, mobile and stationary combustible gas or General requirements and test methods for the structure and performance of vapor detectors. This document is applicable to the detection of combustible gases with indication, alarm or other output functions measuring any volume fraction specified by the manufacturer These detectors are used to indicate potential explosion hazards and, in some cases, automatically or manually trigger linkage protection devices. In this document, the term "shown to volume fraction X% or X% LFL" includes the upper limit of the measurement range equal to or less than X% or X% LFL device of. This document also applies to aspirating detectors with internal sampling systems for safety applications in commercial, industrial, and non-residential settings. This document does not apply to external sampling systems, laboratory equipment, scientific research equipment or equipment used only for process monitoring and/or control, nor For open path (light path) detectors within the scope of GB/T 20936.4.Only those intended for uniform density along the optical path have Devices with very short optical paths are within the scope of this document. For detectors that detect multiple gases, this document only applies to the detection of flammable gases or vapors. This document is a supplement and modification to the general requirements of GB/T 3836.1.When the requirements of this document conflict with the requirements of GB/T 3836.1 In case of emergency, the requirements of this document take precedence. Note 1.This document only proposes the safety level and performance requirements for general-purpose equipment. For special-purpose equipment, product purchasers (or appropriate entrusted person) may impose additional special test or approval requirements on the equipment. For example, for Class I detectors (equipment used in coal mine gas environment), it is also required to comply with Comply with the relevant provisions of the national "Coal Mine Safety Regulations". Note 2.A detector calibrated for a specific gas or vapor cannot accurately indicate other gases or vapors. For this document, the terms "lower explosion limit (LEL)" and "lower flammability limit (LFL)" are considered synonymous. Likewise, the term "explosion on "Upper Limit (UEL)" and "Upper Limit of Flammability (UFL)" are also considered synonyms. For ease of reference, these two sets of terms shown can be used in the text Their acronyms LEL and UEL. Note 3.Concentration indication (volume fraction) can also be used to measure to 100%LFL or 20%LFL equipment. In this case, in verifying the performance of Appendix A When required, it may be necessary to consult the manufacturer for the selection of units of measurement.2 Normative referencesThe contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 2423.10 Environmental testing - Part 2.Test method Test Fc. Vibration (sinusoidal) (GB/T 2423.10-2019, IEC 60068-2-6.2007, IDT) GB/T 3836.1 Explosive atmospheres Part 1.General requirements for equipment (GB/T 3836.1-2021, IEC 60079-0. 2017, MOD) GB/T 3836.11 Explosive atmospheres Part 11.Test methods and data for classification of properties of gases and vapors (GB/T 3836.11-2022, ISO /IEC 80079-20-1.2017, IDT) GB/T 18268.1 Electromagnetic Compatibility Requirements for Electrical Equipment for Measurement, Control and Laboratory Use Part 1.General Requirements ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 20936.1-2022_English be delivered?Answer: Upon your order, we will start to translate GB/T 20936.1-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 20936.1-2022_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 20936.1-2022_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.Question 5: Should I purchase the latest version GB/T 20936.1-2022?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20936.1-2022 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
