NIOSH Education and Information Division
PLANT AND OPERATOR
- Develop "Site Specific Safety Plan" which includes emergency, maintenance and troubleshooting procedures,
- Galvanized pipe is NOT to be used for anhydrous NH3 service...even for temporary repairs,
- Identify "sign off" on material manifest before accepting delivery,
- Unloading lines MUST be compatible for NH3 service,
- Be sure unloading lines are attached and secure,
- Be available during unloading to initiate emergency plans,
- Properly disconnect and secure plant valves following unloading,
- Set up inspection and testing procedures to be applied to ALL storage tanks,
- Equipment should:
- be additives compatible,
- meet NH3 codes and standards,
- Any equipment replacement MUST be made "IN KIND"
- same materials of construction,
- same specifications.
- Unloading hoses must meet same 5 year replacement criteria as facility transfer tanks, and
- Stainless steel hoses are recommended for nurse tank risers.
- Nurse tank contents SHOULD NOT be transferred back to storage tank,
- Nurse tank cutting or welding is ONLY to be done by a certified welder with R-stamp or U-stamp, or equivalent...if baffle is detached...remove tank from service,
- A 5 gallon container of clean and easily accessible water MUST be mounted to the nurse tank, and
- Multiple water sources should be available.
- Opening control valves too quickly may cause excess flow valves to shut,
- Manual valves are to be opened WIDE when transferring liquid ammonia from tank car to storage tank,
- Relief valves must be stamped with replacement date,
- Take extra caution when using additives in fill valves to minimize corrosion
- Flush with additive-free ammonia, or
- Add small amount of lubricating oil after additive,
- Applicator valves on top of tank should be protected by rollover cage... a strap-on design rollover cage should be considered for upgrading applicator tanks.
- Towing vehicles should be of adequate size to handle loaded trailer,
- Each towed trailer should have two (2) safety chains attached...adequately sized and criss-crossed to support the tongue, and
- Securely locked hitch pins designed for service.
This document is a NIOSH Publication, Publication date: April 1993. This bulletin was produced at the University of Missouri - Columbia in coordination with the National Institute for Occupational Safety and Health, Centers for Disease Control, 200 Independence Avenue, SW, Washington, DC 20201. Phone: (800) 356-4674. Developed by Judy Barnes Oskam, Oklahoma State University and Doug Ross, University of Missouri - Columbia.
This is only a synopsis of anhydrous ammonia safety information. For detailed information, contact your local Cooperative Extension office or agrichemical dealer
Publication #: 93-13 1
Disclaimer and Reproduction Information: Information in NASD does not represent NIOSH policy. Information included in NASD appears by permission of the author and/or copyright holder. More
Reviewed for NASD: 04/2002