GB 25286.6-2010 English PDFUS$519.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 25286.6-2010: Non-electrical equipment for explosive atmospheres -- Part 6: Protection by control of ignition source “b” Status: Obsolete
Basic dataStandard ID: GB 25286.6-2010 (GB25286.6-2010)Description (Translated English): Non-electrical equipment for explosive atmospheres -- Part 6: Protection by control of ignition source ��b�� Sector / Industry: National Standard Classification of Chinese Standard: K35 Classification of International Standard: 29.260.20 Word Count Estimation: 13,165 Date of Issue: 2010-11-10 Date of Implementation: 2011-09-01 Quoted Standard: GB 3836.1-2010; GB/T 16855.1; GB/T 20438.3-2006; GB 25285.1-2010; GB 25285.2-2010; GB 25286.1-2010; EN 50303 Adopted Standard: EN 13463-6-2003, MOD Regulation (derived from): Announcement of Newly Approved National Standards 2010 No. 8 (No. 163 overall) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This Chinese standard provides for the use of controlled ignition source for explosive environment type"b"type of protection equipment design and manufacturing requirements. This standard GB25286. 1 part supplement. GB25286. 1 content is also fully applicable in accordance with the provisions of this standard manufacturing equipment. Comply with the relevant provisions of this standard of the device at the same time meet the requirements of the following types: �� Class Mb grade equipment, as well as in normal operation under harsh operating conditions, especially within the mine rough handling and environmental conditions change, there are no ignition sources due to light, �� or �� class Gc Dc -level device, does not occur in normal operation of causing ignition sources of ignition, �� or �� category Db Gb class level devices, as well as expected in normal operation under fault conditions, does not appear capable of causing ignition sources of ignition, �� or �� class Ga Da -class equipment, in normal operation and predictability failure or malfunction rare cases, there are no sources of ignition causing ignition. Note: �� level device class Ma national standards is underway. Refer to the standard specified in the relevant EN50303 Class �� class M1 (corresponding to the level of this standard of the Ma) equipment requirements, including electrical and non-electrical equipment. Such protection can be used in normal operation other ignition source exists and Dc level Gc equipment manufacturing, for example, does not meet GB25286. 1 equipment. Specified in this standard against ignition protection type can be used alone or with other anti- ignition protection type used according to GB25286. 1 the ignition hazard assessment of class �� Mb grade, �� type Ga, Gb, Gc grade and �� class Da, Db, Dc -class equipment to provide protection. This standard does not apply to: the protection control device did not ignite, ignition protection of electrical equipment, from the available GB 25286.6-2010: Non-electrical equipment for explosive atmospheres -- Part 6: Protection by control of ignition source “b”---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. Non-electrical equipment for explosive atmospheres.Part 6. Protection by control of ignition source "b" ICS 29.260.20 K35 National Standards of People's Republic of China Non-electrical equipment for explosive atmospheres Part 6. Control type ignition source "b" Part 6. Protectionbycontrolofignitionsource "b" Published 2010-11-10 2011-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued ForewordAll technical contents of this section is mandatory. GB 25286 "non-explosive atmospheres Electrical Equipment" contains the following sections. --- Part 1. Basic method and requirements; --- Part 2. limiting shell type "fr"; --- Part 3. type flameproof enclosure "d"; --- section 4. intrinsically safe type "g" (under consideration); --- Part 5. Structure safe "c"; --- Part 6. Control type ignition source "b"; --- part 7. Pressurized "p" (under consideration); --- Part 8. liquid immersion "k". This section is GB 25286 "non-electrical equipment for explosive atmospheres" Part 6, is to modify the use of EN13463-6.2003 potentially explosive. " Environmental non-electrical equipment - Part 6. Control type ignition source "b" "(in English) developed. This section and EN13463-6.2003 is the main difference. In order to express agreement with GB 3836.1, this section will EN13463-6. 2003 M1, M2 stage device corresponds to this section Ma, Mb-level device; and EN13463-6.2003 in class Ⅱ 1G, 2G, 3G level Device section respectively correspond to the present type Ⅱ Ga, Gb, Gc-level device; and EN13463-6.2003 in class Ⅱ 1D, 2D, 3D-level device respectively This part shall Class Ⅲ Da, Db, Dc stage equipment; flag also made the corresponding change. In addition, remove the EN13463-6.2003 and headquarters Informative annex ZA and content-independent sub-undetermined informative Appendix C. Appendix A of this section, Annex B is an informative annex. This section was proposed by China Electrical Equipment Industrial Association. This part of the jurisdiction of the National Standardization Technical Committee explosion-proof electrical equipment. This part was drafted. Nanyang Explosion Electric Institute, the national explosion-proof electrical products for Quality Supervision and Inspection Center, Zhejiang Hangzhou Construction Machinery Co., Ltd., Beijing Science and Technology Co., Ltd. North Yongbang. This part of the main drafters. Zhang Gang, Xu Gang, Liu Heng Yun, Hou Hanfang, Li De, Zhang Lixiao, Huang Xiaoping.IntroductionA gas, vapor explosive environment, mist with air and/or combustible dust and air to form various types of non-electrical equipment, Normal operation is usually no effective ignition source. However, if the active components of the device failure or abnormal operation, the source device will be ignited Dangerous. Such as a fan, which is rotated at high speed inside the stator blades fixed to the shaft by a rolling bearing supported. In normal operation, there should not rub Rub ignition source. However, since the gap between the rotor and the stator is very small, if the bearing damage or deformation of the rotor blade, the rotor blade foreign matter The failure causes accumulation gap reduction and friction sparks or hot surface occurs. Method in order to prevent normal operation, malfunction, rare fault condition a potential ignition source into effective ignition source, it is feasible in the device Adding sensors to detect impending hazardous conditions, before a potential ignition source into effective ignition source, in the early stage of the deteriorating conditions Start section control measures. Control measures employed by the sensor and can be run automatically preventing a direct connection between the ignition system, may be Manual operation by issuing a warning to the equipment operator (the purpose is to prevent ignition of the operator to take measures, such as stopping devices). In this section, in order to prevent a potential ignition source into effective ignition source, a sensor used in conjunction with the associated automatic/manual ignition preventing Measures to control the ignition source type is called "b" protection. This type of protection and ignition means for this purpose, can take many forms. In practice, they may be mechanical, Electrical, optical, visual, or a combination of the above forms. Although non-electrical equipment in this section relate to the ignition protection, but still want to test Taking into account the fact that a large number of non-electrical devices use electrical sensors to detect and initiate measures to prevent ignition. Thus, non-standard electrical equipment protection Quasi impossible not involve the use of electrical sensors and associated circuitry used to prevent the ignition system. Some examples of mechanical sensor/driving device is as follows. a) fuse latch (for hydraulic couplings), the temperature exceeds the allowable before the ignition limit member, the power transmission released by melting Energy in the liquid; b) the centrifugal speed controller, direct control of the rotational speed of the power regulating valve and prevent rotation of the friction member exceeds a speed ignited; c) temperature control valve may be closed to reduce the input energy, or may increase the amount of coolant is turned on, and therefore can be prevented to achieve Ignition temperature; d) pressure relief valve (using a spring or weight), and on to limit the temperature rise of the gas pressure level and the subsequent compression. Or, you can prevent Stop catastrophic accidents caused by accidental exposure to the hot surface. Some examples of electro-mechanical sensor/actuator device is as follows. a) temperature, flow and level monitoring/control means, the temperature detection/flow/level and to open the solenoid valve, to reduce the energy input or by Adding an amount of the cooling liquid; b) a light pulse counter, detecting abnormal tooth gear speed, and the speed regulator signals; c) a vibration sensor, for example, before rolling bearing fault detection (usually presents high-frequency vibration), or beyond balancing the rotating member Abnormal vibration (usually presents a low frequency vibration) before; d) correcting the conveyor means, the friction between the fixing member accidental detection of the belt and the support structure; e) power transmission belt tensioning device, the belt detection since the lack of friction between the drive pulley and the belt Zhang Li force resulting from slide; f) clutch wear detector to detect the clutch engaging due to abnormal wear of the friction may cause undesirable temperature rise. Such sensors/driving control means may be continuous operation (e.g., control Gc during normal operation of the device, Dc stage device Temperature), or may only monitor non-normal operation (e.g., monitoring Gb, Db level is approaching a dangerous over-temperature). More than any sensor/failed drive control device may result in failure to prevent the application of measures lit, their related equipment part Piece ignition safety is critical. Therefore this part of the above apparatus to be assessed, and for such a device, it is recommended to prevent the ignition stage Do (IPL) made in the form of minimum parameter. Equipment manufacturers must strive to meet this requirement. Accordingly, to achieve the requirements of this standard, non-electrical equipment manufacturers for both ignition hazard assessment (GB 25286.1 predetermined), while also To prevent ignition determination level (IPL) by evaluating secure the required sensors/ignition system to prevent the risk of ignition within permissible limits of When, can play a role. Flowchart Appendix A (FIG A.1) can help non-electrical equipment manufacturers to comply with procedures specified in this section requires. Non-electrical equipment for explosive atmospheres Part 6. Control type ignition source "b"1 ScopeThis section provides control design requirements and manufacturing type ignition source "b" type of protective equipment for use in explosive environments employed. This section supplement GB 25286.1 section. GB 25286.1 content are also fully applicable to this section manufactured in accordance with a predetermined equipment. Equipment to comply with the relevant portions of a predetermined type meeting the following requirements. --- Class Ⅰ Mb level device, in normal operation and severe operating conditions, especially the mine changes in environmental conditions and rough handling When, does not appear to cause ignition of the ignition source; --- Ⅱ Gc class or classes Ⅲ Dc stage device, does not occur in normal operation due to the ignition of ignition source; --- Ⅱ Gb class or classes Ⅲ Db class equipment, under normal operating and fault conditions expected, does not appear to cause ignition of the ignition source; --- Class Ⅱ Ga or Class Ⅲ Da stage apparatus in the normal operation and predictability rare fault condition or failure, does not appear to cause Ignite ignition source. Note. Class Ⅰ national standards Ma-class equipment to develop in progress. Refer to standard EN50303 provisions regarding Ⅰ class M1 level (corresponding to the present portion Level Ma) device, including the requirements of electrical and non-electrical devices. Such protection may be used to manufacture other ignition source in the presence of normal operation and Gc Dc stage device, e.g., does not meet GB 25286.1 device of. Ignition-protection type may be used alone, may be used in conjunction with other anti-ignition protection type specified in this section, in accordance with GB 25286.1 The ignition hazard assessment, class Ⅰ Mb grade, class Ⅱ Ga, Gb, Gc and grade class Ⅲ Da, Db, Dc stage device provides protection. This does not apply to. --- control device protection does not ignite; --- ignition protection of electrical equipment; --- combustible gas detector, an explosive atmosphere detector, carbon monoxide, fire or smoke detector device start-stop system. NOTE. This is because only in this section relates to the detection and control device appears to be an ignition source, not including explosive atmosphere surrounding the probe. Ignition protection system complies with the relevant provisions of this section are not self-protection system.2 Normative referencesTerms of the following documents constitute provisions of this section by reference in this part of GB 25286. All the reference documents the date of its All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encourage agreements based on this section each Whether the parties can study the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB 3836.1-2010 explosive atmospheres - Part 1. General requirements for equipment (IEC 60079-0.2007, MOD) GB/T 16855.1 mechanical safety control system safety components - Part 1. General principles for design Functional safety GB/T 20438.3-2006 electrical/electronic/programmable electronic safety-related systems - Part 3. Software requirements (IEC 61508-3.1998, IDT) GB 25285.1-2010 explosion prevention and protection - Part 1 environment explosion. basic principles and methods GB 25285.2-2010 explosive atmospheres explosion prevention and protection - Part 2. Basic former mine explosion prevention and protection And the method GB 25286.1-2010 non-electrical equipment explosive atmospheres - Part 1. Basic method and requirements EN50303 for gas and/or equipment class Ⅰ M1 stage dust environment3 Terms and DefinitionsThis part is GB 25286.1-2010, GB 3836.1-2010, GB 25285.1-2010 and indeed in GB 25285.2-2010 Li and the following terms and definitions. 3.1 Control of ignition source type "b" protectionbycontrolofignitionsource "b" An anti-ignition type. Built by the sensor means on the non-essential electrical devices, the probe to occur, could ignite surrounding environment Situation and start to ignite automatic or manual control measures to prevent potential ignition source into an effective ignition source. 3.2 Automatic control measures automaticcontrolmeasure Without manual intervention, to prevent a potential ignition source into effective ignition source movement. 3.3 Manual control measures manualcontrolmeasure Receive a warning, indicating, after the alarm, man taken to prevent potential ignition source into effective action ignition source. 3.4 Ignitionpreventionsystem prevent ignition system; the IPS The signals emitted by the one or more sensors into operation or instruction, means for preventing a potential ignition source into an effective ignition source. 3.5 Prevent ignition level ignitionpreventionlevel; IPL According to prevent the ignition system to determine the level of reliability.4 suitability determinationBefore deciding method to protect a predetermined portion of the present apparatus, including parts connected to each other, should the device according to GB 25286.1 To ignition hazard assessment.5 determines control parameters5.1 ignition hazard assessment if the provisions of Chapter 4 has been shown to have potential ignition sources, and manufacturers have decided to use the provisions of this section Protective measures to prevent a potential ignition source into effective ignition source, equipment manufacturers should determine the potential sources of ignition by calculation or type tests Related control parameters. 5.2 each of the control parameters (e.g., temperature T, the speed S and pressure P) should be in a normal operating value (e.g., Tnorm, Snorm, Pnorm) and a It does not result in a potential ignition source into trouble-value (Tcrit, Scrit, Pcrit) effective ignition source is represented. NOTE. Using the above example of the control parameters are determined. a) normal operating temperatures (TNORM) and by the friction heat caused the exception of the maximum allowable surface temperature of the heat (Tcrit); The maximum allowable speed (Scrit) before b) normal operating speed (SNORM) and capable of generating ignition sparks friction; c) the maximum allowable overpressure (Pcrit) prior to the normal operating pressure (P norm) and capable of generating hot surface ignition; The gap between d) and the fixing member is reduced to the normal activity and the maximum allowable vibration level capable of igniting before; e) prior to sliding due to friction or the ignition of the heat can be generated on the surface, the maximum allowable wear amount of the friction plate/clutch friction lining; f) the amount of coolant and the normal to the surface holding hot coolant flow rate below the minimum ignition temperature of the environment; Normal Level g) and the lubricant can be prevented from igniting the minimum level required frictional heating of the lubricant; h) correcting the normal activities and prevent the contact member and the fixed member maximum allowable deviation.6 to prevent the ignition system design and setting6.1 manufacturer shall be described in detail or will be provided to prevent the operational characteristics of the ignition system is applied to the device (e.g., whether the device is a fuse inserted Pin), which should be considered. --- a potential ignition source into a speed change effective ignition source; --- response time of the sensor/detector; --- prevent ignition system response time; --- potential ignition source difference and effective ignition source (e.g., Tnorm and Tcrit) at the level; --- security considerations. NOTE. Some industry requirements to prevent the ignition detection system has at least two levels. The first, issued a warning to the operator; second, startup protection system. In some cases Under conditions, early warning can be used to prevent false starts. Equipment manufacturers in the design to prevent the ignition control system, you may need to take this into account. 6.2 to user's specification should be provided to prevent the ignition system comprises specified by the manufacturer. 6.3 If the ignition system is to prevent a safety-related equipment, normal operation of the control should not rely on the protection of its equipment, but should only Li operation. 6.4 If the structure prevents ignition system (IPS) is to make the device stops to prevent a potential ignition source into effective ignition source, IPS should be designed to stop the operation of the lock, to prevent the device restarts without resetting the IP system. 6.5 If the structure prevents ignition system (IPS) to provide a warning to the operator or display information, requiring the operator to prevent potential ignition response Source into effective ignition source, indicating, warning, or display the information shall comply with the requirements of human environmental studies, to avoid operator confusion or misunderstanding.7 sensors and actuators ignition protectionMay be positioned to prevent ignition of the explosive atmosphere components of the system itself should not be a source of ignition (see GB 25286.1 and GB 3836.1). 8 to prevent the ignition system to prevent ignition level (IPL) 8.1 1 to prevent the ignition level Level 1 should prevent ignition system proven highly reliable components, the use of proven safety principles, and in accordance with the relevant standard assembly Installation, running in the system is able to withstand the expected impact, it should meet the following requirements. --- if it exceeds the control parameters (e.g., Pcrit, Tcrit) threshold, to prevent the ignition source should become effective ignition source generating point or issue Warning fuel source; --- regular inspection to prevent the ignition source system 1), and shall be found by examining the loss of safety function; --- GB 25286.1 equipment manufacturer's instructions should specify the time interval of a periodic maintenance inspection) and made the subject Fault sensor check/ignition system, the method advised against (e.g., detected). It should also explain in detail if maintenance check It found that the measures after ignition system failure, the user should be taken to prevent malfunction or sensor. Note. Under normal circumstances, the device should provide instructions for use before reuse these faults be repaired. 8.2 2 level to prevent ignition Level 2 prevents ignition system shall comply with the requirements of 8.1, and the other shall be proven highly reliable components, the use of safe and reliable raw Then, according to the relevant standard assembly and installation, operation of the system is able to withstand the expected impact, it should meet the following requirements. --- the control parameter exceeds the threshold value (e.g., Pcrit, Tcrit, etc.), to prevent the ignition source should become effective ignition source; --- If the ignition system to prevent the emergence of a single failure will not result in ignition system security features to prevent loss. --- GB 25286.1 require manufacturers instructions for the devices should prevent the ignition and the detailed provisions sensor inspection system 1) time interval. 1) Routine inspection system simul...... |
