Standard No.:	GB 16248-1996
English Name:	Health standard for respirable coal dust in the air of workplace
Chinese Name:	作业场所空气中呼吸性煤尘卫生标准
Chinese Classification:	C52    Labor sanitation
Professional Classification:	GB    National Standard
ICS Classification:	13.040.30 13.040.30    Workplace atmospheres 13.040.30
Source Content Issued by:	AQSIQ; MOH
Issued on:	1996-4-3
Implemented on:	1996-4-3
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	4000 words
Translation Price(USD):	100.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the maximum allowable concentration and the inspection method of respirable coal dust in the air of workplace. This standard is applicable to every kind of coal dust workplace exposed in the air with the free silicon dioxide content less than 10%. 2 Normative References The involved provisions in the following standard will become the provisions by quoting by this standard. When published, all the shown versions are valid. All the standards will be modified, and all parties using this standard shall discuss the possibility of using the latest version. GB 5748-85 Methods for Airborne Dust Measurement in Workplace TJ 36-79 Hygienic Standards for the Design of Industrial Enterprises 3 Definitions For the purposes of this standard, the following definitions are applied. 3.1 Coal dust Coal dust with the free silicon dioxide content less than 10% in the air of workplace. 3.2 Respirable coal dust The aerodynamic diameter of coal dust in the air of collection workplace is less than 7.07μm, whose collecting efficiency of 5μm particles is 50 %. Respirable dust sampler shall have the following characteristics of separating particles.

Foreword 1 Scope 2 Normative References 3 Definitions 4 Health Requirement 5 Supervision and Inspection Methods Annex A (Normative) Annex B (Normative) Infrared Spectrometry for the Content of Free Silicon Dioxide in Respirable Coal Dust