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GB 15579.8-2014 English PDF

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GB 15579.8-2014: [GB/T 15579.8-2014] Arc welding equipment -- Part 8: Gas consoles for welding and plasma cutting system
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Basic data

Standard ID GB 15579.8-2014 (GB15579.8-2014)
Description (Translated English) [GB/T 15579.8-2014] Arc welding equipment -- Part 8: Gas consoles for welding and plasma cutting system
Sector / Industry National Standard
Classification of Chinese Standard J64
Classification of International Standard 25.160.30
Word Count Estimation 17,172
Date of Issue 12/5/2014
Date of Implementation 10/16/2015
Quoted Standard GB 15579.1-2013; IEC 60050.151; IEC 60529
Adopted Standard IEC 60974.8-2009, IDT
Regulation (derived from) Announcement of Newly Approved National Standards 2014 No. 27
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 Standard specifies Safety requirements flammable gas or oxygen gas circuit device and performance requirements. The pneumatic devices are used in explosive environments is not easy to arc welding, plasma cutting, gouging or similar process provides g

GB 15579.8-2014: [GB/T 15579.8-2014] Arc welding equipment -- Part 8: Gas consoles for welding and plasma cutting system


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Arc welding equioment.Part 8. Gas consoles for welding and plasma cutting system ICS 25.160.30 J64 National Standards of People's Republic of China Welding equipment - Part 8. Welding and plasma Manifold means cutting system Arcweldingequipment-Part 8. Gasconsolesfor (IEC 60974-8.2009, IDT) Issued on. 2014-12-05 2015-10-16 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 Environmental Conditions 2 5 Test 2 5.1 Test conditions 2 5.2 Measuring Instruments 2 5.3 Compliance component 2 5.4 Type test 2 5.5 Routine Tests 2 6 Protection against electric shock 3 6.1 Insulation 3 6.2 normal use protection against electric shock (direct contact) 3 Protection against electric shock (non-direct contact) 6.3 3 when the accident occurred 7 thermal performance requirements 3 7.1 Test 3 fever 7.2 maximum temperature 3 8 plasma torch connection 3 9 Mechanical requirements 3 Fire and explosion 9.1 4 Clean gas pipe 4 9.2 9.3 housing 4 9.4 external air passage means 5 9.5 Internal air passage means 5 10 gas pipe 6 10.1 gas hose or pipe 6 10.2 air connections 6 10.3 Leak Test 6 11 control circuit 6 7 12 Nameplate 12.1 external pneumatic means 7 12.2 internal air passage means 7 13 User's Guide and identification 7 13.1 User's Guide 7 13.2 marks 8 Appendix A (informative) Mechanical plasma system chart 9 Examples Appendix B (informative) plate 10 Appendix NA (informative) consistency in international relations in this part of the file specification and the references of the document 11 Reference 12 Figure A.1 mechanical plasma system Example 9 Figure B.1 compilation principles plate 10 Table 1 Color and numeral 6

Foreword

Part 3 of this chapter are recommended, the rest are mandatory. GB 15579 "arc welding equipment" is divided into 13 parts. --- Part 1. Welding power sources; --- Part 2. Liquid cooling systems; --- Part 3. Arc and Arc Stabilisation Unit; --- Part 4. Periodic inspection and testing; --- Part 5. Wire feeders; --- Part 6. Load limits for manual metal arc welding power source; --- Part 7. torch (gun); --- Part 8. Welding and plasma cutting system gas path means; --- Part 9. Installation and Use; --- Part 10. Electromagnetic compatibility (EMC) requirements; --- Part 11. Electrode holders; --- Part 12. Coupling devices for welding cables; --- Part 13. Welding clamp. This is Part 8 GB 15579's. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method is equivalent to using IEC 60974-8.2009 "welding equipment - Part 8. Gas welding and plasma cutting systems Circuit device. " Consistency correspondence between this part of the normative international documents referenced with our document Appendix NA. This part made the following editorial changes. --- Increase the informative appendix NA. This part is proposed by the China Electrical Equipment Industrial Association. This part of the National Welding Standardization Technical Committee (SAC/TC70) centralized. This section is drafted. Welder Shanghai GM Co., Ltd., Chengdu tripartite Electric Co., Ltd., Chengdu Institute of electric welding machine, Shenzhen City Christie Technology Co., Ltd., Zhejiang Kende Mechanical & Electrical Co., Ltd., Tangshan Matsushita Industrial Equipment Co., Ltd., located in Zhejiang Juba Welding Preparation Manufacturing Co., Ltd. The main drafters of this section. Wang Licheng, Xing Jun, Du Wu, Huai Jiao Zhi, Zhu Xuanhui, An Xiaodong, China Cao again. Welding equipment - Part 8. Welding and plasma Manifold means cutting system

1 Scope

This part of GB 15579 specifies safety and performance requirements of flammable gas or oxygen gas path apparatus. The pneumatic device To arc welding, plasma cutting in explosive environment is not easy, gouging or similar processes provide a gas. Pneumatic device may be installed in an external or internal power supply. When installing the internal power supply, this section also applies to the power supply. NOTE. mechanized plasma system shown in Appendix A.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 15579.1-2013 welding equipment - Part 1. Welding power sources (IEC 60974-1.2005, IDT) And magnetic devices IEC 60050-151 International Electrotechnical terminology electricity [InternationalElectrotechnicalVocabulary (IEV) -Part 151. Electricalandmagneticdevices] IEC 60529 protection provided by enclosures (IP code) [Degreesofprotectionprovidedbyenclosures (IPCode)]

3 Terms and Definitions

GB 15579.1-2013 IEC 60050-151 and define the following terms and definitions apply to this document. 3.1 Air passage means gasconsole Having one or more open structure or housing and for conveying the gas, mixed gas, or a combination comprising two kinds of electrical devices and functions Means. 3.2 Lower Explosive Limit lowerexplosionlimit; LEL Airborne concentrations of combustible gas or vapor, below which the concentration can not form an explosive atmosphere. [IEV426-02-09, revised] 3.3 Lower flammable limit lowerflammabilitylimit; LFL Fire ignition source minimum concentration of flammable gas in the mixed gas. 3.4 Upper explosive limit upperexplosionlimit; UEL Airborne concentrations of flammable gas or vapor, the concentration is higher than can not form an explosive atmosphere. [IEV426-02-10, revised] 3.5 Combustion limit upperflammabilitylimit; UFL Fire ignition source maximum concentration of flammable gas in the mixed gas. 3.6 External air passage means externalgasconsole Pneumatic device is not mounted inside the power supply. 3.7 Internal air passage means internalgasconsole Pneumatic device mounted inside the power supply. 3.8 Single fault condition single-faultcondition Failure condition protective measures to prevent a dangerous place. Note. If a single fault condition inevitably lead to another single fault conditions, such a two failures are considered a single fault condition.

4 environmental conditions

Chapter 4 should be consistent with GB 15579.1-2013 provisions.

5 Test

5.1 Test conditions Shall comply with the provisions of 5.1 GB 15579.1-2013. 5.2 Measuring Instruments GB 5.2 shall comply with the provisions of 15579.1-2013. Compliance 5.3 components GB 5.3 shall comply with the provisions of 15579.1-2013. 5.4 Type inspection GB 5.4 shall comply with the provisions of 15579.1-2013. The section above the other test items not mentioned may be any convenient order. 5.5 Routine Tests 5.5.1 External air passage means Each external pneumatic device should be in the following order the following tests. a) general visual inspection (see GB 15579.1-2013 3.7); b) the continuity of the protective circuit (see GB 15579.1-2013 10.4.2); c) Dielectric strength (see GB 15579.1-2013 6.1.5); d) tightness check (see 10.3); e) general visual inspection (see GB 15579.1-2013 3.7). 5.5.2 internal air passage means Each internal air passage means shall GB 5.5 15579.1-2013 provisions of inspection, test and add the following items. g) tightness check (see 10.3).

6 Protection against electric shock

6.1 Insulation GB 15579.1-2013 shall comply with the provisions of 6.1, with the following exceptions. Printed circuit boards should be sealed, coated or encapsulated. 6.2 normal use protection against electric shock (direct contact) 6.2.1 Enclosure protection The minimum degree of protection pneumatic device should reach IP21S IEC 60529 requirements. Compliance Check. Check by the following tests. a) prescribed by IEC 60529 test finger is applied to the ball or try any openings, should ensure that it does not contact with any hazardous parts; and b) After the prescribed IEC 60529 will be rain test, pneumatic device should be able to insulation resistance and dielectric strength test carried out immediately Experience and can work properly. When the above test, the gas path apparatus is not energized. 6.2.2 Capacitor GB 15579.1-2013 shall comply with the provisions of 6.2.2. Protection against electric shock (non-direct contact) 6.3 when the accident occurred GB 6.3 shall comply with the provisions of 15579.1-2013.

7 thermal performance requirements

7.1 heating test GB 7.1 shall comply with the provisions of 15579.1-2013. For external pneumatic means only relevant test. 7.2 maximum temperature Pneumatic means any part of the temperature shall not exceed the ignition temperature of any flammable gas apparatus to be used. Compliance check. air passage means run according to the manufacturer's requirements. a) selection may produce a mixed gas flow rate and the worst case specified by the manufacturer; b) selection of the coolant specified by the manufacturer.

8 plasma torch connection

According to the provisions of 15579.1-2013 GB 11.4.6 of the torch gas circuit device connected

9 mechanical requirements

Shall comply with GB 15579.1-2013 provisions of Chapter 14, and the following additional requirements. 9.1 fire and explosion Pneumatic devices shall be designed to work under normal conditions and under single fault conditions (such as valves, hoses, etc. failure) can fire and explosion. When the pneumatic device using a flammable gas, any circuit, component or device should not produce a temperature sufficient to cause a fire or sparks. When the air passage means having a combustible mixture of gases, gas mixtures should be defined not in the LFL and UFL combustion limit. Compliance Check. Check by the following tests. a) acknowledge the loop, evaluate and design computing components or devices; or b) make the circuit, component, or device malfunction (eg open circuit, short circuit, and/or movement restrictions), until an accident (such as not to cause a fire Sparks, open fuse, power outages and other devices) or until it reaches thermal equilibrium temperature. 9.2 Clean gas pipeline When the air passage device should have a clean gas pipe measures to ensure that its gas pipeline gas changes adopted (eg. oxygen-containing gas) reduction Risk of fire or explosion. In some cases, a small amount of oxygen or combustible gases may accumulate in the torch. The amount of gas will not be Cause danger. Gas pipeline gas should be cleaned prior to each change or gas used can not be determined. Note 1. Available sufficient amount of inert gas to clean gas piping. Note 2. The risk of fire or explosion exists if the change of gas, should be cleaned under the following pressure cycle state. a) pressure pneumatic circuit device is reduced to atmospheric pressure; b) cleaning with a cleaning gas pipeline; c) the cleaning gas pressure increases to the maximum; d) the pressure gas line circuit device is reduced to atmospheric pressure. Compliance check. The following risk analysis and tests to be checked. After pneumatic device installed all components (valves, fittings, etc.), it will be filled with flammable gas and measurement gas pipeline with a gas detector the amount. Then immediately clean gas pipe in accordance with instructions for use. After cleaning should be immediately measured with a gas detector gas pipeline Gas content, to ensure that the combustion gas is lower than the lower limit (LFL). If you use more than one flammable gas, flammable gas each Body to go through this test. 9.3 shell 9.3.1 Design Requirements Pneumatic device (internal or external) should be designed to withstand or prevent an explosion. To meet this requirement, the air passage device should be at least in any one of the requirements of 9.3.2 ~ 9.3.4. NOTE. All of the following tests are dangerous, the proposed test by qualified personnel. 9.3.2 Clean housing Typical cleaning methods. the use of an inert gas positive pressure cleaning and forced ventilation (for example, the use of arc-fan) to clean. All cleaning Automatic cleaning device flammable gas manifold device housing should start before the other electrical device is powered. When using a fan or other device for cleaning, when a display failure and to prevent their continued operation. After cleaning, the content of the combustible gas to be lower than the lower explosive limit (LEL). Compliance Check. The following in draft-free environment with a) or b) Test to be checked. a) according to the maximum flow rate and pressure specified by the manufacturer simulate continuous gas leakage within the housing. Monitoring and regulation of the gas within the enclosure Until saturation or stability. Start cleaning means, and to ensure that fire monitoring gas before the gas is lower than LEL potential sources of ignition. Correct Each flammable gas used in this test was repeated. b) in the case has been cleaned place an analog arc device. Monitoring and regulation of the housing or stable gas until saturation. start up All cleaning methods and procedures. Means to energize the arc to simulate electronic start and continue to operate, should ensure that no fire phenomenon. For each flammable gas used in this test was repeated. Note 1. Gas LEL level of 50%. Note 2. This test should be carried out considering the leakage rate. Safety Design 9.3.3 pneumatic device 9.3.3.1 Anti-fire Design of pneumatic device should be able to prevent gas leakage within the housing cause a fire. Compliance Check. Check by the following test. a) The charging device (such as an external device or a pneumatic manifold with internal power supply unit) is placed in the bag or the like in vivo; b) simulated gas leak inside the device, in order to produce an internal explosion conditions; c) control the mixed gas until it reaches an intermediate value of LEL and UEL; Duty cycle d) air passage means is at least 1h, during which all components can cause a fire action should be at least 100 times; e) confirm the work cycle no flash phenomenon; f) ignite bag or the like, in order to confirm the presence of flammable gas mixture. Integrity 9.3.3.2 housing Housing (such as an external device or a pneumatic manifold with internal power supply unit) should be able to withstand an explosion without affecting the continuity of the protective circuit. Compliance Check. Check by the following test. a) the non-energized equipment (such as an external device or a pneumatic manifold with internal power supply unit) is placed in the body bag, or the like; b) simulated gas leak within the device to produce an internal explosion conditions; c) control the mixed gas until it reaches an intermediate value of LEL and UEL; d) igniting the flammable gas mixture ignition device installed in the device to cause an explosion; e) confirm that no flying debris; f) confirmation articulated test finger specified in IEC 60529 the reach dangerous live parts; g) confirm the protective circuit continuity by visual inspection and measurement. 9.3.4 Open Architecture For there is no housing or open gas path portion of the housing unit, because the accumulation of combustible gas mixture does not and will not cause an explosion, it shall be considered It is safe. Compliance Check. Check by design review. 9.3.5 Closed housing If the cabinet air passage means no enough space to accumulate oxygen or combustible gas mixture, it shall be deemed to be safe. Compliance Check. Check by design review. 9.4 external air passage means If the air passage means is a flammable gas to the welding torch (gun) transfer, should be closed only electrical or electrical components (such as solenoid valves, measurement Apparatus, flow meter, control loops). Compliance check. visual inspection. 9.5 Internal air passage means When the transfer of flammable gas should be used to isolate the gas pipeline and a gas means the joint gas path components and electrical devices within the same housing Live parts separated by source. Pneumatic control loop device can be placed on either side of the isolation device. Compliance check. visual inspection. 10 gas pipeline 10.1 gas hose or pipe Gas hoses or pipes should be suitable for use. Gas hoses or pipes should match the maximum pressure rating of the maximum rated temperature phase. Air supply hose or pipe in accordance with Table 1 using the appropriate color or marked for identification. When there is more than one gas path and gas Its design structure to prevent wrong connection when the gas hose or pipe is not required mark. Table 1 color and a mark Gas skin color Acetylene or other flammable gas (except LPG, MPS, natural gas, methane outside) red Oxygen Blue Air, nitrogen, argon, carbon black Liquefied petroleum gas (LPG), methylacetylene - propadiene mixture (the MPS), natural gas, methane orange All of the fuel gas (included in this table) Red - Orange Note. This table is derived from the GB/T 2550. This hose is suitable for a hydrogen or propylene or not in consultation with the manufacturer. Compliance check. check visually and 10.3 tests. 10.2 air connections Input gas air connections should not interchangeable (such as size, thread type) to prevent flammable gas with an inert gas or oxygen/air mixing. Compliance check. visual inspection. 10.3 Leakage Test At rated input pressure and temperature rating, all ventilation components should be able to work properly, such as the risk of leakage does not occur according to manufacturer Drain phenomenon. Compliance check. test specified by the manufacturer to ensure the safety of the device. Note. air or inert gas used in this test should not contain contaminants, so as not to affect the oxygen after mixing the ingredients. 11 control loops Not with the welding circuit connected to the control circuit should meet the following requirements. a) control loop voltages up to 250V; b) with a transformer with separate windings to the control circuit power supply; c) there should be over-voltage protection; d) shall have overcurrent protection; e) shall be assessed could affect the safety of a single fault condition occurs; f) transformer secondary loop (except for safety extra-low voltage SELV) should be grounded; g) insulated bundled conductors shall be either a maximum voltage conductor is determined; h) software and logic circuits without a negative impact on security; i) leads to the outside of the housing of the control circuit by double insulation or reinforced insulation separated from the primary circuit. Note 1. This requirement is based in GB 5226.1. Or by measuring the appropriate analyzes is checked or not. Note 2. The control loop types are. a) in the welding/cutting equipment chassis control loop; b) power supply and peripherals manufacturers to design interface control circuit; c) power supply and other auxiliary equipment interface control circuit; d) gas path inside the apparatus control loop. 12 Nameplate 12.1 external air passage means GB 15579.1-2013 shall comply with the provisions of Chapter 15, and make the following amendments (if applicable). a) the type of gas used; b) maximum inlet pressure; Rated maximum air flow c) each gas. Example nameplate on the external air passage means in Appendix B. 12.2 internal air passage means GB 15579.1-2013 provisions of Chapter 15 of the welding power nameplate apply to air passage means mounted within the welding power source enclosure, together Plus the following. a) reference standards; b) the type of gas used; c) maximum inlet pressure; Rated maximum air flow d) of each gas. 13 User's Guide and logo Each gas path should have means to use the specification and logo. 13.1 Instructions Shall comply with GB 17.1 15579.1-2013 and the following additional requirements (if applicable). a) Selecting and connecting the gas hose of information and I/O cables; b) EMC information on the installation and operation of the provisions of this Part; c) on the gas cleaning (for example, every time the gas after the change); d) installation of ventilation requirements; e) the maximum gas flow rate and pressure; f) Information source gas (e.g. purity); g) note. requires tempering prevention device (unless not applicable to a particular gas or desired pressure) to prevent the gas fire at the source spread; h) through internal oxygen and combustible gas flexible hose life and replacement method is recommended; i) information on oxygen pipes pollution; j) of this section, specific information about the installation and operation (for example, with respect to the torch and supply air path means the position). Note. arc welding, plasma cutting and gouging torch used in the process (gun) is a significant source of fire. Compliance check. visual inspection. 13.2 Logo Press GB 17.2 15579.1-2013's (where applicable), and add the following requirements. Each manifold joints should have legible, easy to wear identification. Pneumatic fittings shall be marked with the maximum air pressure and gas type. Compliance check. visual inspection.

Appendix A

(Informative) Mechanical plasma system chart Figure A.1 Mechanical Plasma System Example

Appendix B

(Informative) Example nameplate Explanation. 1 --- manufacturer, importer or distributor's name and address; if necessary, optional trademark name and country of origin; Standard 2 --- this section; 3 --- Manufacturer given model, design and manufacturing traceability information, such as serial numbers; 4 gas types (such as hydrogen or oxygen) --- used; 5 --- Rated input voltage. V; 6 --- rated maximum input current. A; 7 --- maximum inlet pressure. MPa; 8 --- Maximum input flow of each gas. L/min; . 9 --- Protection class. IPXX. Figure B.1 nameplate compilation principles Appendix NA (Informative) Consistency in international relations in this part of the file specification and the references of documents GB/T 2900.83-2008 Electrotechnical terminology of electrical and magnetic devices (IEC 60050-151.2001, IDT) GB 4208-2008 housing protection (IP Code) (IEC 60529.2001, IDT) references [1] GB/T 2550 Gas welding equipment for welding, cutting and similar operations with a rubber hose [2] GB/T 2900.35-2008 Electrotechnical terminology equipment for explosive atmospheres [3] GB 4793.1-2007 measurement, control and laboratory safety requirements for electrical equipment - Part 1. General requirements [4] GB 5226.1 mechanical and electrical safety of machinery - Electrical equipment - Part 1. General requirements [5] GB 15579.7 welding equipment - Part 7. torch (gun) [6] GB/T 16935.1 within low-voltage systems Insulation coordination for equipment - Part 1. Principles, requirements and tests [7] ISO 12170Gasweldingequipment-Thermoplastichosesforweldingandaliedprocesses [8] IEC 60974-2Arcweldingequipment-Part 2. Liquidcoolingsystem [9] IEC 60974-3Arcweldingequipment-Part 3. Arcstrikingandstabilizingdevices twenty one

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