[Code of Federal Regulations]
[Title 29, Volume 5]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 29CFR1910.161]

[Page 505]
 
                             TITLE 29--LABOR

 
CHAPTER XVII--OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT 

                                OF LABOR

 
PART 1910_OCCUPATIONAL SAFETY AND HEALTH STANDARDS--Table of Contents

 
                        Subpart L_Fire Protection

 
Sec. 1910.161  Fixed extinguishing systems, dry chemical.


    (a) Scope and application. This section applies to all fixed 

extinguishing systems, using dry chemical as the extinguishing agent, 

installed to meet a particular OSHA standard. These systems shall also 

comply with Sec. 1910.160.

    (b) Specific requirements. (1) The employer shall assure that dry 

chemical agents are compatible with any foams or wetting agents with 

which they are used.

    (2) The employer may not mix together dry chemical extinguishing 

agents of different compositions. The employer shall assure that dry 

chemical systems are refilled with the chemical stated on the approval 

nameplate or an equivalent compatible material.

    (3) When dry chemical discharge may obscure vision, the employer 

shall provide a pre-discharge employee alarm which complies with Sec. 

1910.165 and which will give employees time to safely exit from the 

discharge area prior to system discharge.

    (4) The employer shall sample the dry chemical supply of all but 

stored pressure systems at least annually to assure that the dry 

chemical supply is free of moisture which may cause the supply to cake 

or form lumps.

    (5) The employer shall assure that the rate of application of dry 

chemicals is such that the designed concentration of the system will be 

reached within 30 seconds of initial discharge.



[45 FR 60712, Sept. 12, 1980]