6
P a r r I n s t r u m e n t C o m p a n y
I n t r o d u c t i o n
The User’s Responsibility
A
ll Parr reactors and pressure vessels are designed and manufactured
with great care to ensure safe operation when used within their pre-
scribed temperature and pressure limits. But… the basic responsibility
for safety when using this equipment rests entirely with the user;
who must:
1. Select a reactor or pressure vessel
which has the capability, pres-
sure rating, corrosion resistance and design features that are suitable
for its intended use. Parr engineers will be glad to discuss available
equipment and material options with prospective users, but the final
responsibility for selecting a reactor or pressure vessel that will perform
to the user’s satisfaction in any particular reaction or test must rest
with the user — not with Parr.
In exercising the responsibility for the selection of pressure equip-
ment, the prospective user is often faced with a choice between over or
under-designed equipment. The hazards introduced by under-designed
pressure vessels are readily apparent, but the penalties that must be
paid for over-designed apparatus are often overlooked.
Recognizing these criteria, Parr reactors and pressure vessels are
offered in several different styles, each designed for convenient use in
daily operation within certain temperature and pressure limits, using
gaskets, closures and other elements carefully selected for safe opera-
tion within the limits specified for that design. But in order to preserve
the validity of these designs, all temperature and pressure limits must
be observed, and no attempt should be made to increase these limits
by making alterations or by substituting components which are not
recommended by the manufacturer.
2. Install and operate
the equipment within a suitable barricade, if
required, with appropriate safety accessories and in full compliance with
local safety codes and rules.
All standard Parr pressure vessels are provided with either a suitable
relief valve or a means to attach one (typically in the form of a plugged
opeining). When a pressure vessel is delivered without a pressure vent-
ing device, it is the customer’s responsibility to provide pressure relief
in order to protect the operator and the equipment from destructive
high pressures. If you need more information or need help in selecting
a proper relief device, please contact Parr Instrument Company.
3. Establish training procedures
to ensure that any person handling
the equipment knows how to use it properly.
4. Maintain the equipment
in good condition and establish proce-
dures for periodic testing to be sure the vessel remains structurally
sound.
