D
esign criteria specified in
the ASME Code for Unfired
Pressure vessels are closely
observed in the manufacture and
testing of all Parr pressure equip-
ment. Cylinders for each reactor
and pressure vessel of standard
design are machined from
solid, hot-rolled or forged bars
of selected corrosion resistant
alloys with no seams or welds in
the vessel as potential sources
of weakness or localized corro-
sion. Each individual cylinder is
tested hydrostatically. For ASME
U-stamped vessels the minimum
hydrostatic test pressure is 1.3
times the rated working pressure
corrected at temperature. For CE
marked pressure vessels the min-
imum hydrostatic test pressure
is the higher of 1.43 times the
rated working pressure at room
temperature or 1.25 times the
rated working pressure corrected
for temperature. Each complete
reactor and vessel is tested with
nitrogen to be sure that it is leak-
free and operating properly.
Protection against equipment
damage and possible personal
injury in case of an accidental
over-pressurization is provided
by a safety rupture disc installed
in the head of each reactor and
in each gage block assembly. A
description of these safety discs
and rules to be observed in their
selection and use are given on
Quality Assurance
Parr Instrument Company
has designed, installed and
operates under a Quality
Assurance Program which
ensures that all aspects of the
design, materials selection and
procurement, manufacture,
testing and certification of its
pressure vessels are performed
in accordance with accepted
codes and practices. Currently
this Quality Assurance Program
has been certified to be in
compliance with ISO 9001: 2008
for Total Quality Procedures,
ASME, CSA (Canadian Standards
Association), and all applicable
European Directives (CE) which
include but not limited to PED
(Pressure Equipment Directive),
LVD (Low Voltage Directive),
EMC (Electromagnetic compat-
ibility), and Machinery Safety.
ISO 9001: 2008 Certification
Parr Instrument Company’s
overall Quality Assurance
System has been certified to be
in compliance with ISO 9001:
2008 by TÜV. ISO 9001: 2008 cov-
ers the overall quality assurance
and management compliance
aspects of Parr’s activities as
opposed to the certification of an
individual product.
ASME Certification
The Parr Instrument
Company holds a Certificate
of Authorization issued by the
Boiler and Pressure Vessel
Committee of the American
Society of Mechanical Engineers
(ASME) as an approved facility
for manufacturing unfired pres-
sure vessels. If required, any
Parr reactor or pressure vessel
can be Certified to the ASME
Code, Section VIII, Division 1,
which involves:
1. Vessel inspection and tests by
an Authorized Inspector of the
National Board of Boiler and
Pressure Vessel Inspectors.
2. Issuance of Form U-1A,
“Manufacturer’s Data Report
for Pressure Vessels”, which
provides certification of the
chemical analysis and physi-
cal properties of materials
used in the vessel.
3. Application of the ASME
Certification Mark with “U”
Certification Designator to
the vessel by the Inspector.
4. Registration of the vessel with
the National Board.
There is an added charge for
this special certification.
Parr is also certified under
Section IX of the ASME Code
for welding. Normally welding
is done only to attach jackets or
fittings to the primary vessel.
CE-PED Certification
The Parr Instrument Company
has implemented, operates and
maintains a quality assurance
system as described in the
Pressure Equipment Directive
(97/23/EC) Annex III, Module
H/H1 for the scope of Design
and Manufacture of Pressure
Reactors and Assemblies for
Laboratory Applications.
Parr Certification
If requested, Parr will furnish
a signed certificate listing the
materials of construction used in
the manufacture of an individual
reactor or pressure vessel, the
pressure tests applied to that
reactor, material certificates and
dimensional drawings. There
is an added charge for this
certification.
A Commitment to a
Worldwide Market
In 1973, Parr Instrument Company made a
commitment to serve customers on a worldwide
basis in a reliable and continuing manner. Parr
products were exhibited for the first time at Achema
in Frankfurt, Germany that year. An extensive effort
was initiated to select and train a network of local
agents to provide technical sales and service support
as well as import services in each of the countries
where modern chemical research and development
is conducted.
In 1982, Parr Instrument Company was awarded
the President’s E Award for Excellence in Exporting
in recognition of our successful efforts in this area.
In 1988, Parr was awarded the U.S. Department of
Commerce’s highest level award the President’s
E Star Award for Excellence in Exporting in
recognition of our continuing and accelerating
success in servicing the world market.
Today, Parr pressure reaction equipment is in use
in over 80 countries and active exclusive agents are
operating in 28 of these. Today, over half of all Parr
pressure reaction equipment is exported from the
USA. As a part of this expansion in the world market,
international considerations are designed into, not
added onto, all Parr equipment.
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D e s i g n F e a t u r e s
Design Codes and Certification
PARR
