HALON

	Facts about Halon
	International Standards calling for Recycling
	How does Halon Get Contaminated ?
	Reasons to have your Halon Recycled

International Standards calling for Recycling
NFPA 12A Clause 4 -1.3
NFPA 12A Clause 4 -1.4
NFPA 12A Clause 4 -2.1
Dot Specification
NFPA 12A
Clause: 4-1.3
The Agent quantity and pressure of refillable containers shall be checked. If a container shows a loss in net weight of more than 5% or a loss in pressure (adjusted for temperature) of more than 10%, it shall be refilled or replaced
NFPA 12A
Clause: 4-1.4
All Hal on removed from refillable containers during service or maintenance procedure shall be collected for recycling.
NFPA 12A
Clause: 4-2.1
D.O.T, C.T.C, or similar design Halon 1301 cylinders shall not be recharged without a retest if more than 5 years have since the date of the last test and inspection elapsed. The retest may consist of a complete visual inspection.

Research and Special Program Admin., DOT
RETEST AND INSPECTION OF CYLINDERS¹

Specification under which cylinder was made²	Minimum retest pressure (p.s.i.)³	Retest period (years)
DOT-3 …………………………....... DOT-3A, 3AA ………………......	3,000 p.s.i ……………………………………………………....... 5/3 times service pressure, except non-corrosive service (see 173.34(e)(13)).	5 5,10, or 12 (see 173.34 (e)(14), (e)(12), (e)(16), and (e)(19))
DOT-3AL ………………………... DOT-3AX, 3AAX …………….. 3B, 3BN …………………………..	5/3 times service pressure …………………………….... 5/3 times service pressure …………………………….... 2 times service pressure (see 173.34 (e)(13))….	5 or 12 (see (e)(19)) 5 5 or 10 (see 173.34 (e)(12))
3C …………………………………... 3D …………………………………... 3E …………………………………... 3HT ………………………………...	Retest not required 5/3 times service pressure ……………………………... Retest not required 5/3 times service pressure ……………………………...	5 3 (see 173.34(e)(15))
3T …………………………………... 4 …………………………………….. 4A ……………………………………	5/3 times service pressure ……………………………….. 700 p.s.i …………………………………………………………..... 5/3 times service pressure (see 173.34(e)(13))	5 10 5, or 10 (see 173.34 (e)(12))
4AA480 …………………………….	2 times service pressure (see 173.34 (e)(13))...	5, or 10 (see 173.34 (e)(13))
4B, 4BA, $BW, 4B-240ET ….	2 times service pressure except non-corrosive service (see 173.34 (e)(13)).	5,10, or 12 (see 173.34 (e)(11), (e)(12), and (e)(19))
4C ……………………………………. 4D, 4DA, 4DS …………………. DOT-4E ………….……………….. 4L …………………………………….	Retest not required 2 times service pressure …………………………………… 2 times service pressure except non-corrosive service (see 173.34 (e)(13)). Retest not required	5 5
8, 8AL ………………………………	………………………………………………………………………………	10 or 20 (see 173.34 (e)(18))
DOT-9 ………………………………. 25 ……………………………………. 26 for filling at over 450 p.s.i. 26 for filling at 450 p.s.i. and below	400 p.s.i. (maximum 600 p.s.i.) ………………………. 500 p.s.i. ………………………………………………………….... 5/3 times service pressure ……………………………….. 2 times service pressure. Except non-corrosive service (see 173.34 (e)(13)).	5 5 5 5 or 10 (see 173.34 (e)(11))
33 ……………………………………. 38 ……………………………………. Exemption cylinder …………	800 p.s.i. ………………………………………………………….... 500 p.s.i. ………………………………………………………….... See current exemption …..………………………………….	5 5 See current exemption
Foreign cylinder (see 173.301 (j) for restrictions on use)⁴.	As marked on the cylinder. But not less than 5/3 of any service or working pressure marking.	5
1 ¹Any cylinder not exceeding two inches outside diameter and less than two feet in length is excepted from hydrostatic retest. ² A cylinder in chlorine or sulfur dioxide service made before April 20, 1915, must be retested at 500 psi. ³ For cylinders not marked with a service pressure, see 173.301 (e)(1). ⁴ For CTC cylinders, see 173.301(i). The retest period for CTC cylinders authorized under 173.301(i) is the period specified in the table for the corresponding DOT specification cylinder.

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