NFPA 407 AMD-2017 Standard for Aircraft Fuel Servicing.pdf

1、NFPA 407- 2017 Edition Standard for Aircraft Fuel Servicing TIA Log No.: 1339 Reference: 5.1.10, 6.1.10.1, 6.1.10.2, 8.1.10.1 and 8.1.10.2 Comment Closing Date: October 19, 2017 Submitter: J.R. Nerat, Badger/Kidde Fire Protection 1. Revise 5.1.10 to read as follows: 5.1.10 Fire Protection. At least

2、one fire extinguisher, with a minimum rating of 80 40-B:C, and a minimum capacity of 9.0 kg (20 lb.) of dry chemical agent shall be provided at each fueling vehicle loading position or rack. 2. Revise 6.1.10.1 and 6.1.10.2 to read as follows: 6.1.10 Fire Protection. 6.1.10.1 Each aircraft fuel servi

3、cing tank vehicle shall have two listed fire extinguishers, each having a rating of at least of 80 40-B:C and a minimum capacity of 9.0 kg (20 lb.) of dry chemical agent, with one extinguisher mounted on each side of the vehicle. 6.1.10.2 One listed fire extinguisher having a rating of at least 80 4

4、0-B:C and a minimum capacity of 9.0 kg (20 lb.) of dry chemical agent shall be installed on each hydrant fuel servicing vehicle or cart. 3. Revise 8.1.10.1 and 8.1.10.2 to read as follows: 8.1.10 Fire Protection. 8.1.10.1 Each facility shall have a minimum of one fire extinguisher with a rating of a

5、t least 80 40-B:C and a minimum capacity of 9.0 kg (20 lb.) of dry chemical agent located at the dispenser. 8.1.10.2 At least one fire extinguisher with a rating of at least 80 40-B:C and a minimum capacity of 9.0 kg (20 lb.) of dry chemical agent shall be provided at each emergency fuel shutoff con

6、trol. Substantiation. The recent 2017 editions minimum numerical extinguisher rating change from 20B to 80B is currently generating the replacement of existing fire extinguisher models installed at airport sites from 20 pound to 30 pound sizes to comply with NFPA-10 requirements. Because I dont beli

7、eve this was the intent of the technical committee, have respectfully submitted a TIA to help avoid the unnecessary/costly replacement of many suitable 20 pound fire extinguisher models and mounting brackets from airport fueling applications. Since 2007 the NFPA-10 portable fire extinguisher standar

8、d has specifically required the use of dry chemical fire extinguisher models having minimum agent discharge rates of at least 1 pound per second for properly addressing potential class “B” Obstacle, 3-Dimensional and Pressure fire situations. (Reference section 5.5) These are the specific types of a

9、nticipated class “B” fire situations typically presented during aircraft fueling releases. Other NFPA standards addressing similar fire hazard concerns such as NFPA-385 (Transportation of Flammable and Combustible Liquids) and NFPA-410 (Aircraft Maintenance) specifically also identify and require si

10、milar types and sizes of hand portable fire extinguisher models. Because each class “B” numerical fire rating has a minimum pre-established discharge time, the agent discharge rates from fire extinguishers are often significantly reduced to extended durations and obtain those higher ratings. This is

11、 why the “High-Flow” discharge models specifically designated for addressing special class “B” fire hazard situations, commonly carry reduced numerical ratings. Prior to 2007, the NFPA-10 standard simply stated that the class “B” fire extinguisher rating system was not applicable for properly addres

12、sing such fire situations and that the equipment manufacturers should be consulted. Other industry standards attempting to establish proper minimum hazard protection needs back then, simply identified minimum extinguisher sizes with lower ratings. The technical committee should note, that most of th

13、e large airport flight line wheeled fire extinguisher models having minimum 125 pound agent capacities currently only require and carry 80B ratings for this reason. While there are number of ways the technical committee could address the current compliance issue, believe the quickest resolution is w

14、ith a TIA that simply reduces the existing minimum 80B rating requirement to a minimum 40B rating and clarifies the minimum acceptable extinguisher size. This would continue to permit most existing minimum 20 pound dry chemical extinguishers to remain in service, as various models with lower ratings

15、 and agent flow rates exceeding 1 pound per second have commonly been installed and utilized at airport fueling sites for over 30 years. Also attached is additional information for anyone who may want to see and better understand the various existing extinguisher hardware/rating limitations associat

16、ed with NFPA 10 requirements. Emergency Nature. The standard contains an error or an omission that was overlooked during the regular revision process. The NFPA Standard contains a conflict within the NFPA Standard or within another NFPA Standard. The proposed TIA intends to correct a circumstance in

17、 which the revised NFPA Standard has resulted in an adverse impact on a product or method that was inadvertently overlooked in the total revision process or was without adequate technical (safety) justification for the action. The recent numerical fire extinguisher rating changes within the 2017 edi

18、tion is currently requiring the replacement of most equipment installed and utilized at airports around the world, to comply with NFPA-10 requirements for the proper protection of special class “B” hazard situations. The existing 20 pound fire extinguisher models would all need to be replaced with m

19、uch larger 30 pound models for compliance. The proposed TIA language resolves compliance issues and clarifies the desired hazard coverage objectives previously established and utilized for many years. Anyone may submit a comment by the closing date indicated above. To submit a comment, please identi

20、fy the number of the TIA and forward to the Secretary, Standards Council, 1 Batterymarch Park, Quincy, MA 021697471. Fire Extinguisher Hardware Availability Chart Extinguisher Standards for Agent Types and Fire Ratings Dry Chemical and Dry Powders (ANSI/UL-299) Carbon Dioxide (ANSI/UL-154) Water Typ

21、es (ANSI/UL-626) Halon Types (ANSI/UL-1093) Halocarbon Types (ANSI/UL-2129) Film-Forming Foam Types (ANSI/UL-8) Fire Testing & Ratings (ANSI/UL-711) Extinguisher Nominal Agent Size/Capacity Categories 1# 2.5# 5# 10# 20# 30# 50# 100# 150# 350# (hand portable) (wheled.) Existing Numerical Class A & B

22、Fire Rating Hardware Limitations Class “A” Ratings 1A 2A 3A 4A 6A 10A 20A 30A 40A (.hand portable.) ( wheeled) Class “B” Ratings 1B 2B 5B 10B 20B 40B 60B 80B 120B 160B 240B 320B 480B 640B (hand portable) (.wheeled) Extinguisher Agent Capacities & Discharge Rates (PPS= pounds Per Second) 1# 2.5# 4# 5# 6# 10# 20# 30# 50# 125# 350# (.less than 1 PPS.) (greater than 1PS.) ( .greater than 2 PPS plus.) NFPA-10 High-Flow “Hand Portable” Numerical Rating/Size Limitations 1A 2A 3A 4A 6A 10A (10#) ( 20#.&30#.) 1B 2B 5B 10B 20B 40B 60B 80B 120B 160B (.10#.) (20#) (30# .)