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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB 25286.5-2010: Non-electrical equipment for use in potentially explosive atmospheres -- Part 5: Protection by constructional safety “c” Status: Obsolete
Basic dataStandard ID: GB 25286.5-2010 (GB25286.5-2010)Description (Translated English): Non-electrical equipment for use in potentially explosive atmospheres -- Part 5: Protection by constructional safety ��c�� Sector / Industry: National Standard Classification of Chinese Standard: K35 Classification of International Standard: 29.260.20 Word Count Estimation: 17,110 Date of Issue: 2010-11-10 Date of Implementation: 2011-09-01 Quoted Standard: GB 4208-2008; GB/T 6391-2003; GB 8624-2006; GB/T 10715-2002; GB 25285.1-2010; GB 25285.2-2010; GB 25286.1-2010; GB 25286.6-2010; GB 25286.8-2010; IEC 60079-4; EN 982; EN 983; EN 13478; EN 50303 Adopted Standard: EN 13463-5-2003, 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 non-electrical equipment for explosive atmospheres structural safety type"c"type of sand to protect the design and construction requirements. This standard is complementary to requirements GB 25286. 1, GB 25286. 1 structural safety provisions of all applicable type equipment. GB 25286.5-2010: Non-electrical equipment for use in potentially explosive atmospheres -- Part 5: Protection by constructional safety “c”---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 use in potentially explosive atmospheres.Part 5. Protection by constructional safety "c" ICS 29.260.20 K35 National Standards of People's Republic of China Non-electrical equipment for explosive atmospheres Part 5. Structure safe "c" Part 5. Protectionbyconstructionalsafety "c" 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 Table of ContentsIntroduction Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative References 1 Terms and definitions 1 3 4 2 Overview Movable member 5 in claim 3 6 bearings require 3 Powertrain claim 7 4 8 clutches and couplings in claim 5 9 brakes and brake system requires 6 Spring 10 and the force receiving element in claim 6 Belt 11 requires 6 12 mark 7 Annex A (normative) device structure using structural member safe "c" protection methods and principles of example 8 Annex B (normative) Test in claim 12ForewordAll 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 5, is to modify the use of EN13463-5.2003 "potentially explosive Environmental non-electrical equipment - Part 5. Structure safe "c" "(in English) developed. This section and EN13463-5.2003 is the main difference. In order to converge with GB 3836.1 type statements, this section EN13463-5.2003 in M1, M2 respectively correspond to stage device of this section Ma, Mb-level device; the EN13463-5.2003 Ⅱ in Class G-1,2,3 device section respectively correspond to the present type Ⅱ Ga, Gb, Gc-level device; the EN13463-5.2003 Class 1 Class Ⅱ D, Level 3 corresponds to a portion of the apparatus are Class Ⅲ Da, Db, Dc stage equipment; flag also made the corresponding change. In addition, deleted EN13463- 5.2003 nothing to do with this part of the informative annex ZA. Appendix A of this part of the information appendix, Appendix B is normative. 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, Dalian staircase grams Pump Co., Ltd., Zhejiang Hangzhou Construction Machinery Co., Ltd. This part of the main drafters. Zhang Gang, Zou Lili, Huang Xiaoping, Zhang Lixiao. This section was first released in 2010.IntroductionNon-electrical equipment in industrial applications place an explosive environment for many years, and in the application of protective measures to reduce the risk of ignition to qualified Security level process has accumulated rich experience. Wherein an anti-ignition protection method is selected under normal operating conditions is free ignition source Device type, then the reasonable application of engineering principles, so that mechanical failure may cause the risk of ignition or spark ignition temperature is reduced to a very low s level. Such ignition-protection measures This section deals with the structural safety type "c". Non-electrical equipment for explosive atmospheres Part 5. Structure safe "c"1 Scope1.1 part specifies the design and construction requirements for explosive atmospheres with a non-protected electrical equipment type structure safe "c". 1.2 part required supplements GB 25286.1, GB 25286.1 predetermined safe structure are all suitable. 1.3 equipment in line with the relevant provisions of this section meet the requirements of the following levels. --- Class Ⅰ Mb stage equipment; --- Ⅱ Ga or Gb class level equipment; --- Ⅲ Da or Db class level equipment. 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. 1.4 predetermined portion of the anti-ignition protection type may be used alone may also be used with other types of protective anti-ignition, according to satisfy GB 25286.1 ignition hazard assessment in determining the level of class Ⅰ Ma and Mb stage, grade class Ⅱ Ga, Gb grade level or class Ⅲ Da, Db class equipment Requirements.2 Normative referencesTerms of the following documents constitute provisions of this section by reference in this part of GB 25286. For dated reference documents Pieces, all subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach under this section Whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB 4208-2008 shell protection (IP code) (IEC 60529.2001, IDT) GB/T 6391-2003 Rolling Dynamic load ratings and rating life (ISO 281-1990, IDT) GB 8624-2006 grade building materials and combustion properties of products GB/T 10715-2002 ribbed transmission belt, V belt and includes a wide V-belt, hexagonal belt including a single V-belt Antistatic Conductive tape. Requirements and test methods GB 25285.1-2010 explosive atmospheres explosion prevention and protection - Part 1. Basic Principles and Methods GB 25285.2-2010 explosive atmospheres explosion prevention and protection - Part 2. Basic Principles mine explosion prevention and protection And methods GB 25286.1-2010 non-electrical equipment explosive atmospheres - Part 1. Basic method and requirements GB 25286.6-2010 non-electrical equipment explosive atmospheres - Part 6. Control type ignition source "b" GB 25286.8-2010 non-electrical equipment explosive atmospheres - Part 8. liquid immersion "k" IEC 60079-4 explosive atmospheres Electrical Equipment Part 4. ignition temperature Test Method Safety Safety EN982 mechanical fluid power systems and components required hydraulic device Safety Safety EN983 mechanical fluid power systems and their components pneumatic means EN13478 Safety of machinery - Fire prevention and protection EN50303 for gas and/or equipment class Ⅰ M1 stage dust environment3 Terms and DefinitionsThis part is established in GB 25286.1-2010 25285.2-2010 and GB 25285.1-2010, GB , and the following terms and definition. 3.1 Structural safety type "c" typeofprotectionconstructionalsafety "c" Using structural measures to protect against the hot surface of the movable member caused by adiabatic compression and spark ignition may cause the anti-ignition protection Protection type. 3.2 Mechanical sparks mechanicalsparks The impact between the two kinds of the same or different solid materials or friction sparks and spark cluster.4 Overview4.1 suitability determination Before using the apparatus or method for protecting device assembly according to the predetermined portion (including the interconnecting member), shall be in accordance with GB 25286.1 Ignition hazard assessment carried out first. Further, the assessment should be determined to ensure that no points by enhancing or increasing the performance of certain weak security member Ignition source. 4.2 Equipment member All internal components and connections of the components of the apparatus during its entire intended lifetime, should be positive in accordance with the operating parameters specified by the manufacturer Often it works, maintaining sufficient robustness and durability when subjected to mechanical and thermal stresses expected. 4.3 Degree of protection 4.3.1 Overview Degree of protection provided apparatus housing (IP) depending on its intended use and environment of the type designed to be used. As the ignition hazard assessment Part, be determined based on the appropriate level of 13.4 GB 4208-2008 predetermined first type of housing IP (see 4.1), and should be able to Preventing foreign objects or water into the device. Or outside water into the apparatus may cause. a) Anti-ignition decreases to a level lower value, such that the temperature is lower than the ignition temperature of the combustible dust explosive atmosphere inside the heat Elements or devices member is formed on the capping layer; and/or b) contacting the movable member, a potential source of ignition, fire or risk of failure. 4.3.3 to 4.3.5 of the following provisions apply to the environment of the housing of the lowest degree of protection (IP). 4.3.2 will not bring harm, if the device should be used in anti-gas/vapor atmospheres, when foreign objects may lead to ignite, but the dust entering Stop falling objects enter. 4.3.3 If the apparatus for gas/vapor environment, or when a foreign object enters the liquid may cause a malfunction and leads to the formation ignition source, protective shell Rating of at least IP54. 4.3.4 If the apparatus for combustible dust, when the dust will enter the forming or flame ignition source, at least enclosure rating For the IP6X. 4.3.5 If the apparatus for combustible dust, when the dust and foreign matter from entering unlikely to cause ignition, without the use of the housing. Note. for other security reasons, may require a housing, such as housing IP2X housing member preventing contact with the rotating member. 4.4 Activity of the sealing member 4.4.1 non-lubricated gasket, seal, sleeve, bellows, and a separator No lubrication gasket, seal, sleeve, bellows, and a separator, in normal operation or if there is sliding friction under the anticipated fault conditions, should not be The use of light metals. However, a sleeve made of PTFE or similar material, graphite, ceramic and suitable elastic material. Non-metallic materials should be resistant to deformation and aging, and does not reduce the proof performance (see GB 25286.1). 4.4.2 stuffing box seal Only when the temperature does not exceed the maximum surface temperature to use stuffing box seal. Note. should the temperature monitoring means and equipment operation is stopped. 4.4.3 lubricated seal In general, the lubricant need to add the contact surface member prevented apparatus generates heat seal design surface, should ensure adequate lubrication Agent, or protected by one of the following methods. --- provide an efficient method of monitoring the continuous presence of a lubricant; or --- provide temperature monitoring devices, alarm at elevated temperatures; or --- devices designed to be able to in Appendix B of the "dry run" test, the device does not exceed the maximum surface temperature and/or Ignition occurs will reduce its protective properties of anti-corruption. Note. continuous monitoring or detection and inspection by an appropriate monitor. Manufacturers instructions shall include such sealing properly lubricated, a detailed description of the monitoring and maintenance. 4.5 Equipment lubricant/coolant/liquid 4.5.1 predetermined ignition temperature to prevent a potentially flammable hot surfaces or sparks machine (see GB 25286.8) a lubricant and/or coolant (See IEC 60079-4) should be higher than the maximum surface temperature of 50K apparatus using a liquid. 4.5.2 Any liquid can not be caused by the release of ignition. Note. Due to high temperature such as release or static electricity. Movable member in claim 5 5.1 Overview Ignition hazard assessment (see 4.1) should be noted that the Ministry of activity early failure due to wear or vibration may produce unsafe, shock or friction Pieces. Consider EPL apparatus protection level, the structure of such components over the life of the ignition source should not be so, manufacturing or Measures taken's instructions shall be specified. NOTE. slowly rotating member peripheral speed less than 1m/s, and usually do not require protection against heat and sparks generated by mechanical friction. For high-speed rotation Equipment components, structural safe "c" type of protection may not apply. In this case, consideration should be given to other types of protection, such as the type flameproof enclosure "d" or positive Pressure-type "p". 5.2 Vibration Non-accidental movable member should be avoided due to vibration potentially flammable hot surfaces or mechanical sparks. Non-accidental vibration may cause the device itself Into, or cause because of the location of its installation. Should avoid potentially flammable hot surfaces or sparks such mechanical causes. The manufacturer shall provide the necessary Required for installation, operation and maintenance instructions. In particular predetermined speed range specification device to be operating correctly. Note 1. The device may be mounted or a vibration control means for controlling excessive vibration associated movable member of any potential ignition source (see GB 25286.6). NOTE 2. When the melting point of the material for manufacturing the movable member is lower than the maximum surface temperature of the device, or can potentially flammable hot surface and/or mechanical sparks, normally not To use the additional protective measures (such as providing a low melting point disposable wear plates; plastic fan housing made of metal or a low melting point with a disposable non-sparking Metal fan blade tip of the fan). 5.3 gap No lubrication gap size between the movable member and the fixed member, can avoid potentially flammable hot surface and/or mechanical friction sparks Contacts (to prevent some failures can be expected to take precautions, see 5.1 Notes 1 and 2). Note. See the protective liquid components GB 25286.8. 5.4 Lubrication Rely on the media to prevent the lubricating moving parts than the maximum surface temperature rise caused by flammable or mechanical sparks structure should ensure that there is always run Slip media presence. By oil slinger lubrication, automatic lubrication oil level monitoring system or manually controlled system, and the proper maintenance and periodic description Recommended inspection frequency to achieve. When these methods are not possible, it should be used to control other dangerous method ignited. (E.g., temperature sensing Emits an alarm temperature before reaching the flammable, or using a temperature sensor to control potential ignition source) (see GB 25286.6). When the device is designed for the treatment liquid part of the functions, and the liquid to be treated is lubricating, cooling, or quenching to prevent ignition of the basic requirements, Under GB 25286.1, the manufacturer should description of this specification.6 bearing requirements6.1 Overview Bearing substantially divided into three types. plain sliding bearings, rotation sliding and rolling bearings. When assessing bearing, as Ignition hazard assessment part of GB 25286.1 requirements (see 4.1), the following requirements (not finalized column item) should be considered. --- bearing equipment designed to meet the intended use, such as speed, load, and the differential speed and load; --- bearing basic rating life, see GB/T 6391 provisions for the rolling bearing (see note 1 below); --- bearing fitting (tolerance, roundness and surface quality) in the bearing housing and the shaft, taking into account the hole and bearing with the radial bearing And axial load; --- correct position locating bearing; --- the most severe operating conditions of the rotary shaft and the housing caused by thermal expansion of the axial and radial loads; --- prevent water and solid particles into the protective bearings, if necessary, to avoid premature failure; --- axis current protection, including stray circulation (circulation may cause spurious, e.g., between the ball and the ball of the ball bearing race Formed through the contact point generation caused premature failure of incendive spark production or spark erosion); --- based bearing lubricant type required to provide adequate lubrication (e.g., sliding bearings, boundary lubrication, mixed film, the whole film or hydraulic Lubrication is the most common way); --- recommended maintenance period; When --- or occurrence of unacceptable wear recommended life cycle expires, to be replaced; --- When the bearing protection from vibration, especially at a standstill. When any of the above items depends on the user manually checks detect a critical failure or malfunction, the manufacturer in accordance with the provisions of GB 25286.1 Specification information shall contain the necessary instructions. For Ma, Ga, Da-level equipment manufacturer shall specify the running-in period, during which the device does not exist around the source of flammable atmospheres. Note 1. Currently, there is not a proper experimental test method can prove to be a known type of bearing a low risk of ignition source at work. Ball and roller Bearing Manufacturer column should be possible to deal with the probability of mechanical failure of the work (e.g., deformed element, or one element or flaking spallation primer Since failure), provide for a basic rating life values. This basic rating life were available when the ignition hazard assessment, determine possible causes for the creation of flammable heat Dangerous surface or sparks of bearing failure. Rotation of one million revolutions can withstand the axial and radial loads and the underlying ball/roller bearings Theoretically, indeed Given its basic rating life. Typically the number of hours the expected operating life or life expectancy of the number of turns as a unit, with a "L" value indicates. As it will work Minimize the risk of failure, the manufacturer should pay attention to good design, axial and radial load ratio, structure, lubrication, cooling and maintenance procedures is extremely important. with When the recommended regular inspection during operation to detect a critical failure. Note 2. Bearing operating life largely depends on working conditions, it is impossible to reliably calculate their working life. Note 3. plane bearing is not affected, it is impossible to calculate its working life. Should ensure lubrication in accordance with the provisions of 6.2. Bearings should be consistent with the current state of technology. Should be checked regularly and/or monitoring of bearings, to prevent ignition risk. Equipment manufacturer specification shall include the necessary operational details, operating frequency and properly maintained. 6.2 Lubrication Rely lubricant to prevent the temperature rise exceeds the maximum surface temperature or mechanical sparks caused by flammable bearing structure should ensure that the lubricant is always exist. This can be through lifelong sealed bearings, lubrication oil rejection, automatic lubrication system or monitoring the oil level in manual systems, as well as regular maintenance Appropriate instructions and recommended inspection frequency to achieve. When t......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB 25286.5-2010_English be delivered?Answer: Upon your order, we will start to translate GB 25286.5-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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