Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 82, Subpt. G, App. H Appendix H to Subpart G of Part 82—Substitutes Subject to Use Restrictions and Unacceptable Substitutes, Effective May 28, 1999

All HCFC-22 end-uses, retrofit and new

NARM-22

Unacceptable

This blend contains HCFC-22, and it is inappropriate to use such a blend as a substitute for HCFC-22. In addition, this blend contains HFC-23, which has an extremely high GWP and lifetime. Other substitutes for HCFC-22 exist that do not contain either HCFC-22 or HFC-23.

Metals, Electronic, and Precision cleaning with CFC-113, methyl chloroform, and HCFC-141b

Chlorobromo-methane

Unacceptable

Other alternatives exist with zero or much lower ODP.

Total flooding

HFC-236fa

Acceptable subject to narrowed use limits.

Acceptable when manufactured using any process that does not convert perfluoroisobutylene (PFIB) directly to HFC-236fa in a single step:

Use of this agent should be in accordance with the safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Systems.

for use in explosion suppression and explosion inertion applications, and

Users should observe the limitations on HFC-236fa acceptability by taking the following measures:

for use in fire suppression applications where other non-PFC agents or alternatives are not technically feasible due to performance or safety requirements:

(i) conduct an evaluation of foreseeable conditions of end-use;

(a) because of their physical or chemical properties, or

(ii) determine that the physical or chemical properties, or other technical constraints of the other available agents preclude their use; and

(b) where human exposure to the extinguishing agents may result in failure to meet safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

(iii) determine that human exposure to the other alternative extinguishing agents may result in failure to meet safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

Documentation of such measures should be available for review upon request.

The principal environmental characteristic of concern for HFC-236fa is its high GWP of 9400 and long atmospheric lifetime of 226 years. Actual contributions to global warming depend upon the quantities emitted.

See additional comments 1, 2, 3, 4, 5.

Total flooding

C₃F₈

Acceptable subject to narrowed use limits.

Acceptable for nonresidential uses where other alternatives are not technically feasible due to performance or safety requirements:

Use of this agent should be in accordance with the safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

(a) because of their physical or chemical properties, or

Users should observe the limitations on PFC acceptability by taking the following measures:

(b) where human exposure to the extinguishing agents may result in failure to meet safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

(i) conduct an evaluation of foreseeable conditions of end-use;

(ii) determine that the physical or chemical properties or other technical constraints of the other available agents preclude their use; and

(iii) determine that human exposure to the other alternative extinguishing agents may result in failure to meet safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

Documentation of such measures should be available for review upon request.

The principal environmental characteristic of concern for PFCs is that they have high GWPs and long atmospheric lifetimes. Actual contributions to global warming depend upon the quantities of PFCs emitted.

See additional comments 1, 2, 3, 4, 5.

Total flooding

C₄F₁₀

Acceptable subject to narrowed use limits.

Acceptable for nonresidential uses where other alternatives are not technically feasible due to performance or safety requirements:

Use of this agent should be in accordance with the safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

(a) because of their physical or chemical properties, or

Users should observe the limitations on PFC acceptability by taking the following measures:

(b) where human exposure to the extinguishing agents may result in failure to meet safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

(i) conduct an evaluation of foreseeable conditions of end-use;

(ii) determine that the physical or chemical properties or other technical constraints of the other available agents preclude their use; and

(iii) determine that human exposure to the other alternative extinguishing agents may result in failure to meet safety guidelines in the latest edition of the NFPA 2001 Standard for Clean Agent Fire Extinguishing Systems.

Documentation of such measures should be available for review upon request.

The principal environmental characteristic of concern for PFCs is that they have high GWPs and long atmospheric lifetimes. Actual contributions to global warming depend upon the quantities of PFCs emitted.

See additional comments 1, 2, 3, 4, 5.

Additional comments:

1—Should conform with relevant OSHA requirements, including 29 CFR 1910, Subpart L, Sections 1910.160 and 1910.162.

2—Per OSHA requirements, protective gear (SCBA) should be available in the event personnel should reenter the area.

3—Discharge testing should be strictly limited to that which is essential to meet safety or performance requirements.

4—The agent should be recovered from the fire protection system in conjunction with testing or servicing, and recycled for later use or destroyed.

5—EPA has no intention of duplicating or displacing OSHA coverage related to the use of personal protective equipment (e.g., respiratory protection), fire protection, hazard communication, worker training or any other occupational safety and health standard with respect to halon substitutes.

Halon 1211 replacement

C6F14

Acceptable for nonresidential uses where other alternatives are not technically feasible due to performance or safety requirements: (a) because of their physical or chemical properties, or (b) where human exposure to the extinguishing agents may result in failure to meet applicable use conditions.

Users should observe the limitations on PFC acceptability by taking the following measures: (i) conduct an evaluation of foreseeable conditions of end-use; (ii) determine that the physical or chemical properties or other technical constraints of the other available agents preclude their use; and (iii) determine that human exposure to the other alternative extinguishing agents may result in failure to meet applicable use conditions Documentation of such measures should be available for review upon request. The principal environmental characteristic of concern for PFCs is that they have high GWPs and long atmospheric lifetimes. Actual contributions to global warming depend upon the quantities of PFCs emitted. For additional guidance regarding applications in which PFCs may be appropriate, users should consult the description of potential uses which is included in the March 18, 1994 Final Rule (59 FR 13044.) See comments 1, 2.

Halon 1211 replacement

HFC-236fa

Acceptable in nonresidential uses when manufactured using any process that does not convert perfluoroisobutylene (PFIB) directly to HFC-236fa in a single step

See comments 1, 2, 3.

Halon 1211 replacement

HFC-227ea

Acceptable in nonresidential uses only

See comments 1, 2.

Additional comments:

1—Discharge testing and training should be strictly limited only to that which is essential to meet safety or performance requirements.

2—The agent should be recovered from the fire protection system in conjunction with testing or servicing, and recycled for later use or destroyed.

3—Acceptable for local application systems inside textile process machinery.

Halon 1301 replacement

Chlorobromo-methane

Unacceptable

Other alternatives exist with zero or lower ODP; OSHA regulations prohibit its use as extinguishing agent in fixed extinguishing systems where employees may be exposed. See 29 CFR 1910.160(b)(11).

Solvent in aerosols with CFC-113, MCF, or HCFC-141b

Chlorobromo-methane

Unacceptable

Other alternatives exist with zero or much lower ODP.

Solvent in adhesives, coatings, and inks with CFC-113

Chlorobromo-methane

Unacceptable

Other alternatives exist with zero or much lower ODP.

Solvent in adhesives, coatings, and inks with MCF

Chlorobromo-methane

Unacceptable

Other alternatives exist with zero or much lower ODP.

Solvent in adhesives, coatings and inks with HCFC-141b

Chlorobromo-methane

Unacceptable

Other alternatives exist with zero or much lower ODP.