Standard No.:	GB/T 2891-1995
English Name:	Performance test methods for facepiece of filter type respirator
Chinese Name:	过滤式防毒面具面罩性能试验方法
Chinese Classification:	C73    Articles for labor protection
Professional Classification:	GB    National Standard
ICS Classification:	13.340.30 13.340.30    Respiratory protective devices 13.340.30
Issued by:	STSB
Issued on:	1995-06-28
Implemented on:	1996-1-1
Status:	abolished
Superseded by:	GB 2890-2009 Respiratory protection - Non-powered air-purifying respirators
Superseded on:	2009-12-1
Abolished on:	2009-12-01
Superseding:	GB 2891.1-1982 Test method of gas tight performance of exhalant valve for respirator GB 2891.2-1982 GB 2891.3-1982 Test method for inspiratory resistance of filter gas mask GB 2891.4-1982 GB 2891.5-1982 Test method for actual harmful space of filter gas mask GB 2891.6-1982 Test method for air leakage coefficient of filter gas mask (Oil mist method)
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	180.0
Delivery:	via email in 1 business day

Performance test methods for facepiece of filter type respirator 1 Subject content and application scope This standard specifies the performance test methods for wearing leakage coefficient, effective dead space, visual field, assembly airtightness, outlet valve airtightness, air resistance of outlet valve, light transmittance (light transmittance ratio) of spectacle lens and inspiratory resistance of facepiece of filter type respirator. This standard is applicable to the performance test and evaluation of facepiece of filter type respirator (hereinafter referred to as "facepiece"), and may also be referred to for other related products. 2 Normative references GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties GB 2410 Determination of the luminous transmittance and haze of transparent plastics GB 2428 Head configurations - Chinese adults 3 Technical contents 3.1 Test method for wearing leakage coefficient of facepiece (oil mist method) 3.1.1 Principle When a person is wearing the respirator, the ratio of the concentration c of hazardous substances leaking into the facepiece through the tight-fitting frame, outlet valve and parts assembly positions of facepiece to the external concentration c0 of the same is called the leakage coefficient of facepiece, expressed in percentage (%).

1 Subject content and application scope 2 Normative references 3 Technical contents