Anhydrous Ammonia Bottles; Are PRV's Required?
Anhydrous Ammonia Bottles; Are PRV's Required?
(OP)
Just a little confused about the requirements for a PRV on Anhydrous Ammonia bottles. These are relatively small bottles (150 lb) and are marked with DOT numbers.
ANSI K61.1 says that PRV's are not required when the bottle holds less than 165 lbs.
However, 49 CFR Ch.1, Section 178 says that "Each portable tank... MUST be fitted" with a primary PRV... (emphasis mine)
Does 49 CFR outweigh the ANSI standard in this case? Anybody know? I know the bottles have been manufactured for many years without PRV's, but it appears that perhaps they should be installed.
Thanks,
Stolzbrad
ANSI K61.1 says that PRV's are not required when the bottle holds less than 165 lbs.
However, 49 CFR Ch.1, Section 178 says that "Each portable tank... MUST be fitted" with a primary PRV... (emphasis mine)
Does 49 CFR outweigh the ANSI standard in this case? Anybody know? I know the bottles have been manufactured for many years without PRV's, but it appears that perhaps they should be installed.
Thanks,
Stolzbrad





RE: Anhydrous Ammonia Bottles; Are PRV's Required?
49 CFR § 107.805 Approval of cylinder requalifiers
49 CFR § 173.301 General requirements for shipment of compressed gases in cylinders...
49 CFR § 180.203 Definitions
49 CFR § 180.205 General requirements for requalification of cylinders
49 CFR § 180.209 Requirements for requalification of specification cylinders
49 CFR § 180.209 Requalification markings
49 CFR § 180.215 Requirements for requalification of specification cylinders
All of these standards are available on the web. This should provide a starting point for your search.
RE: Anhydrous Ammonia Bottles; Are PRV's Required?
Anyone else?
RE: Anhydrous Ammonia Bottles; Are PRV's Required?
The more you learn, the less you are certain of.