Westech Industrial Ltd.


  • Flame Arresters

Westech Industrial Ltd. is a leading supplier of analytical instrumentation and process control equipment to a wide variety of industries. In 2016 Westech will be celebrating a milestone of 50 years in business, we are very proud to have developed a reputation as the source for quality solutions and superior customer service.

Explosions due to flame arrester failures are destructive, expensive and potentially deadly. Prior to 1989, no arrester provided protection against all types of flame propagation. In fact, no practical technology existed for testing detonation flame arresters used in piping systems. Existing flame arrester standards were clearly inadequate for in-line applications. Improper arrester selection and application lead to storage tank and processing unit explosions. Without an arrester designed and tested to meet the levels of protection required, the potential for a major disaster is high.

With the existing and future guidelines for emissions control comes a new challenge for safe facility operations. Installation of marine vapour recovery and destruction systems creates a high potential for disaster. In fact, an earlier explosion at a marine vapour control system in the U.S., pointed out the need for enhanced standards and in particular, the need for an adequate test standard for in-line arresters.

The advent of USCG, CSA and CEN standards is a major step forward in safe facility operation. Investigations and research continue on Detonation Flame Arresters.


The Series 59 Overview

Test Protocol

Tested in accordance with the United States Coast Guard CFR
154.

Sizes:

Size 2” – 12” NEC Group D vapors (IIA/M.E.S.G. .9 mm).

Protection

Bi-directional. Quenches deflagrations, stable and overdriven
detonations regardless of piping configuration. Complete testing
through the flame profile curve.


Installation

The Series 59 can be installed in the vertical or horizontal
position

Passive Operation

Completely self-contained with no reliance on power supplies,
sensors, actuators or any external components.

Brochure Sheet

United States Coast Guard Accepted

Accepted by the U.S. Coast Guard (U.S.C.G. CFR154) for 2”
– 18” line sizes. They can be installed in any identical line size
piping configuration regardless of length and restrictions.
Accepted by PTB for 4”, 6”, 8” and 10” sizes. Full line approval
pending.


Tested in Excess of Existing Standards

Accepted to ATEX 94/9/EC and EN12874 as well as other
international standards. (CSA, USCG, FM, UL, PTB, BSI, IMO)
Tested for conditions not mandated by exisiting standards, such
as momentum impulse (long run stable detonation), thermal
failure and reignition of downstream unburned gases providing
maximum protection against all modes of flame propogation.

Passive Operation

Completely self contained with no reliance on power supplies,
sensors, actuators or any external components.

Type I – Endurance Burn Accepted

Accepted by the U.S. Coast Guard for Type I continuous burn
protection. Due to the increased stabilization flame protection,
Type I arresters do not require additional temperature monitors,
quick closing valves and associated equipment as is the case with
Type II arresters.

Protection Independent of Location

Can arrest flame fronts anywhere in the piping system regardless
of pipe length and configuration.

Self-Sealing Element Design

Unique self-sealing element design is impervious to impact
damage from repeated high pressure (4,000+ psi/276 bar)
detonation shock waves. Actual protection increases when
exposes to these forces.

Detonation Momentum Attenuators

Incorporates Westech’s patented Detonation Momentum
Attenuators (DMA) plates to provide shock wave protection, as
well as particulate knock out of entrained solids in the vapour
stream.

Large Element Surface Area

Designed up to 13 times the surface area of conventional
arresters decreasing pressure drop and fouling effects.

Low Pressure Drop

Reduces arrester costs as well as costs associated with piping
systems and components.

Easily Cleaned

Unique element design allows for ease of removal and cleaning.

Increased Element Thickness

.025” (0.65 mm) provides substantial corrosion allowance for
increased protection and longer element life.

Optional Features

  • Arrester housing fabricated in 316 SS
  • DIN mating flange connections
  • Special alloy fabrication and internal coatings
  • Special surface finishes
  • Special testing and designs

United States Coast Guard Accepted

Accepted by the U.S. Coast Guard (U.S.C.G. CFR154) for 2”
– 18” line sizes. They can be installed in any identical line size
piping configuration regardless of length and restrictions.
Accepted by PTB for 4”, 6”, 8” and 10” sizes. Full line approval
pending.


Tested in Excess of Existing Standards

Accepted to ATEX 94/9/EC and EN12874 as well as other
international standards. (CSA, USCG, FM, UL, PTB, BSI, IMO)
Tested for conditions not mandated by exisiting standards, such
as momentum impulse (long run stable detonation), thermal
failure and reignition of downstream unburned gases providing
maximum protection against all modes of flame propogation.

Passive Operation

Completely self contained with no reliance on power supplies,
sensors, actuators or any external components.

Type I – Endurance Burn Accepted

Accepted by the U.S. Coast Guard for Type I continuous burn
protection. Due to the increased stabilization flame protection,
Type I arresters do not require additional temperature monitors,
quick closing valves and associated equipment as is the case with
Type II arresters.

Protection Independent of Location

Can arrest flame fronts anywhere in the piping system regardless
of pipe length and configuration.

Self-Sealing Element Design

Unique self-sealing element design is impervious to impact
damage from repeated high pressure (4,000+ psi/276 bar)
detonation shock waves. Actual protection increases when
exposes to these forces.

Detonation Momentum Attenuators

Incorporates Westech’s patented Detonation Momentum
Attenuators (DMA) plates to provide shock wave protection, as
well as particulate knock out of entrained solids in the vapour
stream.

Large Element Surface Area

Designed up to 31 times the surface area of conventional
arresters decreasing pressure drop and fouling effects.

Low Pressure Drop

Reduces arrester costs as well as costs associated with piping
systems and components.

Easily Cleaned

Unique element design allows for ease of removal and cleaning.

Increased Element Thickness

.025” (0.65 mm) provides substantial corrosion allowance for
increased protection and longer element life.

Optional Features

  • Arrester housing fabricated in 316 SS
  • DIN mating flange connections
  • Special alloy fabrication and internal coatings
  • Special surface finishes
  • Special testing and designs