NIOSH Education and Information Division
- 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.
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
NASD Review: 04/2002
This document
is NIOSH Publication,
93-13
1
.
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
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