Compressed Gases cont'd - doe-hdbk-1139-3-20050053

DOE-HDBK-1139/3-2005

Sources11

Consolidated Requirements12

4.2.5 Compressed gas cylinders in storage shall not be heated above

ANSI Z49.1, 10.8.1.8;

125F 23.

CGA G-1, 4.2.3;

CGA P-1, 3.7.2;

NFPA 51, 2.2.1;

NFPA 55, 6.6.1;

NFPA 55, 7.1.5.7

4.2.6 Compressed gases in storage shall be segregated from

ANSI Z49.1, 10.8.2.2;

incompatible materials or combustibles in storage by either a

ANSI Z49.1, 10.8.2.3;

distance of 20 ft. or by a noncombustible partition with a fire

resistance rating of hour and extending not less than 18 inches

CGA G-1, 4.2.5;

above and to the sides of the stored material. The

CGA P-1, 4.2.4;

noncombustible barrier shall be five feet high for those cylinders

CGA P-1, 4.4.4;

that are less than three and a half feet tall.

NFPA 51, 2.2.1;

[EXCEPTION: Under ANSI Z49.1 and NFPA 55 welding gases

NFPA 51, 2.4.3;

located on a weld cart are considered to be "in use" and not in

NFPA 55, 7.1.5.2;

storage. This is also consistent with the NFPA 45 definition of

29CFR1926.350(a)(10;

"in use". Under these cited standards, then, this requirement

29CFR1926.350(a)(11;

does not apply to oxygen and fuel gases on a weld cart.

29CFR1910.253(b)(2)

Similarly, since oxygen and fuel gases on a weld cart are

(ii);

considered to be "in use" under these standards, they also are

29CFR1910.253(b)(4)

not required to be segregated from each other.]

(iii)

[NOTE: The intent of these requirements is to discourage the

manufacture of unsafe weld carts and to prevent the practice of

removing welding gases from carts at the end of every work shift

or day, since this additional handling of the gases is considered

to be inherently more hazardous than is their temporary storage

on weld carts. It should be noted , however, that keeping oxygen

and fuel gases on a weld cart for excessively long periods

without any actual use would counter the intent of these

requirements.]

4.2.6.1 Flammable gas cylinders shall be stored a minimum

NFPA 55, 2.2.1.5

distance of 20 ft. from storage of flammable and

combustible liquids and solids.

4.2.7 The inside storage of more than 2,000 standard cubic ft. (scf) of

29CFR1910.253(b)(3)

flammable gas, or more than 300 pounds of liquefied petroleum

(i)

gas requires a separate room, compartment, or special storage

building.

This requirement includes the storage of compressed gas cylinders in direct sunlight where the sunlight may cause

the cylinder to overheat.