Chapter - 1
MNL000440.doc
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09/19/2016
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The process and purge gas cylinders can contain pressures up to 2650 psig in the
USA. In Europe, cylinders can contain pressures up to 200 barg. A leak from a
loose mechanical fitting, component or a ruptured/failed component can expose
the operator to a high pressure gas stream or projectile.
Read the cylinder
handling warnings in Section 1.10.7 and the safety literature on cylinder
handling in Section 1.13
.
The house nitrogen supply lines can contain pressures of 100+ psig (7+ barg).
Exercise care when working around these lines. Insure that pressure has been
vented before breaking any connection. Tag out and lock out the line before doing
any work.
Follow Typical Minimal Lockout or Tagout System Procedures
described by Occupational Safety and Health Admin., Labor Para. 1910.147
found in Section 1.11.
1.10.7
Cylinder Handling Hazards
High pressure gas cylinders could be extremely
hazardous when not handled properly.
Proper training, maintenance, leak testing and mechanical connection procedures
can prevent operators from being exposed to high pressure gas streams.
Use the
cylinder change out procedures in Section 8.3.2, "Process Cylinder
Procedures."
•
Do not use a wrench or other device to close diaphragm type cylinder
valves. This could cause diaphragm rupture and valve failure which
could result in personal injury or death.
Contact your gas supplier for
the maximum torque (ft./lbs. or N/m) allowed on diaphragm type
cylinder valves. Certain gases are supplied with cylinder valves without