A flame arrester operate by removing heat from the flame as it attempts to travel through narrow passages with heat-conductive walls. The arrester will stop a high velocity flame head by absorbing heat from the flame head, which lowers the burning gas/air mixture below its auto-ignition temperature and creating an atmosphere where the flame cannot survive. Channels or passage are designed into the device to conduct heat outward but still allow the gasses to flow. Here is a document to help you apply the correct type for your requirement. Please always consult an applications expert (Belilove Company-Engineers - (510) 274-1990) prior to selection and installation.

1. FLAME ARRESTER APPLICATION QUESTIONNAIRE
Definitions: Run-Up Length (L): pipe length on the unprotected side of the flame arrester
(see diagram - tested with straight pipe)
Run-Up Length Ratio (L/D): run-up length divided by pipe diameter
The information below is required in order for us to help you choose the appropriate flame
arrester model for your application.NEC Methane D C B A
IEC IIA1 IIA IIB1 IIB2 IIB3 IIB IIC
Pre-Ignition Pressure
Pre-Ignition Temperature
Maximum Pressure Drop
Required Flow
Max Allow Working Pressure
Run-Up Length (L)
Flange Size (D)
L / D
:
OMER:
Gas Group (circle one)
L
Groth in-line deflagration flame arresters must be installed at or within 10 pipe
diameters of the source of ignition and are only approved for gas groups IIA1 /
Methane, pre-ignition pressures at or below 15.7 psia, and pre-ignition
temperatures at or below 140°F. Groth end-of-line deflagration flame arresters
must be installed at or within 10 pipe diameters of the end of a vent pipe and are
only approved for gas groups IIA / D, pre-ignition pressure at or below 14.7 psia
(atmospheric), and pre-ignition temperatures at or below 140°F.
Orientation (circle one)
HorizontalVertical
Location (circle one)
In-Line End-of-Line
10/5/2011
PROCESSINSTALLATION
Gas Group (choose one): NEC IEC
q METHANE q IIA1
q D q IIA
q C q IIB3
Operational Pressure ________________________
Operational Temperature ________________________
Maximum Pressure Drop ________________________
Required Flow ________________________
Run-Up Length (L) ________________________
Flange Size (D) ________________________
Run-Up Length Ratio (L/D) ________________________
Orientation (choose one): qVertical qHorizontal
Mounting (choose one): qIn-Line qEnd-of-Line
CUSTOMER:
FOR ATEX APPLICATIONS: refer to ISO 16852, Section 7.4 Limits for use, for more information on the application limits of flame arresters.
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Continental Disc Corporation reserves the right to alter the information in this publication without notice. // © 2012 Groth Corporation
Reproduction without written permission is prohibited.
LIT1083 // 0812