Taylor-Wharton Bulk Tank Safety Data - Manual (Page 14)

Maintenance Safety
Never allow persons that are not adequately trained and properly super-
vised to attempt maintenance or operation of this equipment.
Follow all safety precautions in this booklet and cited reference publica-
tions when making repairs to this cryogenic storage tank. If combustible
gases are present, make certain system pressure is relieved and the liquid
container and all piping are drained and purged with nitrogen before
making any repairs requiring use of welding equipment or other ignition
source. If hydrogen is present in any part of the system and repairs
require use of an ignition source, isolate piping requiring repairs and
provide a continuous purge of nitrogen gas through the isolation section.
Use spark free tools made of brass or aluminum if the presence of
hydrogen is suspect.
Maintain a permanent record of all inspectors, vacuum measurements
and system repairs. If equipment does not operate properly, stop work
immediately and investigate cause of malfunction. Field repair to instru-
ments and controls must be made by a qualified instrument specialist.
Use only approved replacement parts suitable and cleaned for cryogenic
oxygen or hydrogen service.
Warning for O
2
System Users
Residue of leak detectors solutions can be flammable. All surfaces to
which the leak detector solutions have been applied must be adequately
rinsed with potable water to remove all traces of residue. Reference CGA
G-4.4 Section 4.9 (see page 15).
After making repairs requiring disassembly or part replacement, leak test
all valves and piping joints that were taken apart and reconnected. Use
Sherlock 5-Second Leak Detection Solution, Type CG concentrate,
obtainable from Winston Products Company, Inc.
Warning
A small amount of gas may leak from around the adjusting screws while
regulator caps are removed. Take precautions to prevent sparks or other
sources of ignition in the vicinity of the regulators in combustible gas
service while adjustments are being made.
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