Great Plains NH3 Safety - Manual (Page 23)

Great Plains Manufacturing, Inc. Table of Contents Index Ammonia Nurse Tanks 19
2013-07-15 Table of Contents Index 407-551M
Nurse Tank Sides and Mid-Section
Refer to Figure 17 (depicting a pre-1988 ASME nameplate)
A72 Tank Nameplate:
Locate and inspect this plate. It may be anywhere
on the tank (but will be on the tank, and not on the
running gear or tongue). It is often at top center.
Check that the plate is present, and legible. The
1966 vintage plate depicted at right has marginal
legibility in places.
Do not accept a nurse tank with an illegible
nameplate. Do not accept a nurse tank that is not
consistent with the requirements of anhydrous
service. See ANSI K61.1/CGA G-2.1 for a complete
list of requirements, but some key items to check for
are:
Refer to Figure 17
A73 Safety Decals:
Study any safety decals. Make sure all operators
understand them, and have learned safety
procedures well enough that they know what to do
without consulting the decals after an accident.
A74 Instructional Decals:
Study any operating information provided in decal
form. If the nurse tank cart has no manual,
informational decals may be the only formal
documentation available.
• Manufacturer name
• Repair stamp - normally blank. An “R” here
indicates that the tank has been repaired by an
authorized facility. Do not accept a repaired tank
without an “R” stamp.
• Tank serial number
• MWAP: Maximum Allowable Working
Pressure (250 PSIG @ 125 °F, is minimum and
typical for NH
3
service)
• Type: Must be “AG”
• Official code “U”-over-”W” symbol. Any other
symbol here means the tank is not NH
3
service.
• Year of manufacture. A tank made before
1999 may lack current safety features.
Do not use a tank made before July 1961.
Do not use an undated tank.
A post-1988 nameplate will also:
• be fully welded onto the tank (not riveted)
• specify the standard to which it was built, usually
ANSI K61.1 or CGA G-2.1
• explicitly specify “for anhydrous ammonia use”
• specify MDMT (Minimum Design Metal Temperature)
Missing Nameplate?
If there is no nameplate, check for evidence of
recertification within the last five years, such as FMCSA
Cargo Tank (CT) registration number, or paper
documentation under DOT SP-13554 or CSA B620.
Figure 16
Anhydrous Tank Nameplate
31562
A72u
A72p
A72m
A72y
A72s
A72r
A72t
A72m
A72r
A72s
A72p
A72t
A72u
A72y
Figure 17
Nurse Tank Operations Decals
31563
A73
A74