Standard No.:	AQ 4202-2008
English Name:	Administrative standard for personal exposure concentration of respirable coal dust in the air of workplace
Chinese Name:	作业场所空气中呼吸性煤尘接触浓度管理标准
Chinese Classification:	70
Professional Classification:	AQ
Source Content Issued by:	State Administration of Work Safety
Issued on:	2008-11-19
Implemented on:	2009-1-1
Status:	valid
Superseded by:	WS 760-2008
Superseding:	LD 39-1992
Target Language:	English
File Format:	PDF
Word Count:	2000 words
Translation Price(USD):	100.0
Delivery:	via email in 1~3 business day

本标准代替LD 39-1992《作业场所空气中呼吸性煤尘接触浓度管理标准》。
本标准适用于作业场所空气中游离二氧化硅含量少于5%的煤尘的管理。
本标准与LD 39-1992相比主要变化如下：
——细化了呼吸性煤尘和呼吸性煤尘接触浓度的定义；
——修订了呼吸性煤尘接触浓度管理限值。