Groth 7658A User Manual
1
Flame Arrester
Installation, Operation and Maintenance
7658A
Detonation
IOM 7658A.0
May 2015
2
Table of Contents
Section
Page
Introduction
1
Specifications
1
Test Results
1
Design & Function
2
Installation
2
Maintenance
3
Model Identification
5
Product Limited Warranty
5
Tables
Bolt torque
3 & 4
MESG tables
5
Flow capacity table
6&7
Attachments
Certification Test Report
Detonation flame arrester-Bi-directional
Type II-contunuous burn time One hour
Minimum MESG 0.036" [0.92 mm]
Maximum system pressure 15.7 PSIA
Ambient temperature range -13° F to 140° F
Certification reports- 2" through 6" size
Swacer, Inc. test report #97-2
CSA verification-File #LO 4000-5704
INTRODUCTION
This manual is intended to provide recommended
procedures and practices for installation,
operation and maintenance of the Groth Model
7658A detonation flame arrester. Any standard
procedures and practi ces developed for a specifi c
plant or process should supersede this manual.
Although this manual cannot cover all possible
contingencies, following these guidelines will
provide safe, reliable detonation flame arrester
service.
The arrester shall be treated as a safety device
and must be maintained by a knowledgeable
repair technician. Carefully read and understand
this Manual before installing or servicing this
product. Groth Corporation offers repair services
for all products manufactured by the Tank
Protection Division.
For information not contained in this manual,
please contact:
Groth Corporation
13650 N. Promenade Blvd
Stafford, Texas 77477
281-295-6800
281-295-6995(Fax)
SPECIFICATIONS
Groth detonation flame arresters are constructed
in compliance with the United States Coast
Guard [USCG] specifications for Marine Vapor
Control Systems.
SUMMARY OF TEST RESULTS
The Groth Model 7658A detonation flame
arrester has been subjected to the following test
procedures:
• Detonation testing in compliance with USCG
33 CFR Part 154 Appendix A
• Endurance burn test in compliance with
USCG 33 CFR Part 154 Appendix A
• Corrosion test in compliance with USCG 33
CFR Part 154 Appendix A
• Flow capacity tests.
• Hydrostatic and pneumatic pressure tests.
The above test s were conducted by Swacer, Inc.
and verified by the Canadian Standards
Association. The summary and conclusions of
the reports are attached.
DESIGN AND FUNCTION
Groth's detonation fl am e arrest ers are des igned t o
prevent flame propagation in gas piping systems
which contain flammable gas/vapor mixtures.
The arrester must prevent flame passage under
certain specified conditions while permitting free
flow of gas/vapor through the system. Thus it
protects vulnerable equipment or components of
the system from damage due to explosive
pressures caused by gas/vapor ignition in another
part of the system. The detonati on flam e arrester
must be used under only those operating
conditions for which it was designed and tested.
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