GB/T 25749.4-2010Safety of machinery -- Evaluation of the emission of airborne hazardous substances -- Part 4: Tracer method for the measurement of the capture efficiency of an exhaust system (English PDF)
机械安全 空气传播的有害物质排放的评估 第4部分：测量排气系统捕获效率的示踪法
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Issued by
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Level / Type
National · Recommended
Issue date
December 23, 2010
Implementation date
October 1, 2011
Scope
GB/T 25749.4-2010 is the English-translated version of 机械安全 空气传播的有害物质排放的评估 第4部分：测量排气系统捕获效率的示踪法.
GB/T 25749.4-2010 is the Chinese standard "Safety of machinery -- Evaluation of the emission of airborne hazardous substances -- Part 4: Tracer method for the measurement of the capture efficiency of an exhaust system".
Its scope clause reads: This section GB/T 25749 specifies the measurement of the exhaust system installed on the machine capture efficiency. The method is based on tracer technology Surgery, and can in all types of test environment (test stand, indoor and outdoor, see GB/T 25749.1) in operation.
This technique works only if the aerodynamic properties of the tracer gas and real pollutants having comparable circumstances apply (see 7.1.1).
Measuring the exhaust system can be used to capture efficiency. a) evaluate machine performance exhaust system; b) improved exhaust system assessment; c) design is similar machine exhaust system; d) in accordance with the capture efficiency of the exhaust system of classification; e) determining the exhaust system to achieve a given air flow to capture the required level of efficiency; f) technology to determine the machine according to the capture efficiency of the exhaust system. Its clauses include terms and definitions.
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Document preview — GB/T 25749.4-2010
National Standard of the People's Republic of China
- ICS
- 13.110
- Classification
- J 09
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Contents
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 6 Test Method
- 6.1 General Procedure
- 6.2 Measurement of the concentration of C3
- 6.3 Application-specific machine group
- 7 control parameters and factors
- 7.1 General
- 7.2 Control parameters
- 7.3 Effect of capture efficiency factor
- 8 Test Report
1 Scope
This section GB/T 25749 specifies the measurement of the exhaust system installed on the machine capture efficiency. The method is based on tracer technology
Surgery, and can in all types of test environment (test stand, indoor and outdoor, see GB/T 25749.1) in operation.
This technique works only if the aerodynamic properties of the tracer gas and real pollutants having comparable circumstances apply (see 7.1.1).
Measuring the exhaust system can be used to capture efficiency.
a) evaluate machine performance exhaust system;
b) improved exhaust system assessment;
c) design is similar machine exhaust system;
d) in accordance with the capture efficiency of the exhaust system of classification;
e) determining the exhaust system to achieve a given air flow to capture the required level of efficiency;
f) technology to determine the machine according to the capture efficiency of the exhaust system.
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/T 15706.1-2007 Safety of machinery - Basic concepts, general principles for design - Part 1. Basic terminology, methodology (ISO 12100-1.2003, IDT)
3 Terms and Definitions
GB/T 15706.1-2007 and as defined in the following terms and definitions apply to this document.
3.1 Capture efficiency
etaC
< Exhaust System> Exhaust System collected directly given this contaminant mass flow of pollutants emitted by machines and uncontrolled mass flow
The ratio between the amount.
3.2 Tracer technique
Use the aerodynamic characteristics of hazardous substances considered similar and gaseous substance technology concentration can be measured reliably.
Principle 4
Principle of measurement method comprising. […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
Referenced standards
Normative references
GB/T 15706.1-2007
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Related Standards
GB/T 25749.5-2012 — Safety of machinery -- Evaluation of the emission of airborne hazardous substances -- Part 5: Test bench method for the measurement of the separation efficiency by mass of air cleaning systems with un-ducted outlet
GB/T 25749.3-2010 — Safety of machinery -- Evaluation of the emission of airborne hazardous substances -- Part 3: Test bench method for the measurement of the emission rate of a given pollutant
GB/T 25749.6-2012 — Safety of machinery -- Evaluation of the emission of airborne hazardous substances -- Part 6: Test bench method for the measurement of the separation efficiency by mass of air cleaning systems with ducted outlet
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