GGG-M-131C
February 7,
1978
SUPERSEDING
(See 6.4)
FEDERAL SPECIFICATION
MASK, GAS (INDUSTRIAL)
This specification was approved by the Commissioner,
Federal Supply Service, General Services Administration,
for the use of all Federal Agencies.
1. SCOPE AND CLASSIFICATION
1.1 Scope. This specification covers gas masks used to protect the
wearer from gases only, or gases and particulate matter commonly
encountered
in industrial application.
1.1.1 Federal specification coverage. This specification provides
for
all types of industrial gas masks which are subject to prior inspection
and
testing in accordance with either Title 30 Code of Federal Regulations
(30CFR), Part 11- Respiratory Protective Devices, Test for
Permissibility:
Fees, or Schedule 14F, April 23, 1955, US Department of the Interior,
Bureau
of Mines, Respiratory Protective Apparatus Tests for Permissibility;
Fees,
Part 13 - Gas Masks, before use by the Federal Government.
1.2 Classification.
1.2.1 Type. Gas masks shall be of the following types or
combination of
types, as specified (see 6.2). When specified (see 6.2), type A masks
shall
afford protection against a specific acid gas as specified (see 6.2).
When
specified (see 6.2), type D masks shall be for self-rescue use only.
Type A - Acid gases.
Type B - Organic vapors.
Type C - Ammonia.
Type D - Carbon monoxide.
Type E - Particulate matter (this type shall only be used as
a suffix to one of the other types, except type N,
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