Product Catalog
End-of-line Flame Arrestor
The end-of-line flame arrestor (also known as flame arrestor breathing cap) is a safety device installed on the open ends of storage tanks, vessels, vent risers, gas outlets and other equipment.It prevents external flames from entering the equipment through the nozzle, and also stops flames from spreading outward if the gas inside the equipment is ignited.
- Parameters
- Drawing
- Application areas
Working Principle
Slit Quenching:When external flame enters the flame arrestor element (corrugated plates, wire mesh or porous metal), it is split into countless ultra-narrow channels. Heat is rapidly conducted away by the metal walls, extinguishing the flame and blocking its access into the equipment interior.
Anti-Backfire & External Ignition Prevention:Dual protective function: it stops open flames from outside igniting gas inside the tank, and also contains combustion flames from the tank from spreading outward.
Weatherproof Structural Design:The end-of-line type is equipped with rainproof, splash-proof and dust-proof constructions, allowing direct outdoor installation.
Structural Composition
Shell:Carbon steel / 304 / 316L stainless steel, flange connection complying with GB, HG, ANSI, DIN, GOST standards.
Flame Arrestor Element (Core Component):304 or 316L corrugated plates, multi-layer wire mesh or porous metal; the clearance is designed according to the MESG value of the medium.
Sealing Parts:PTFE, fluoroelastomer (FKM), metal graphite gaskets
Qualifications & Certifications
Type Certification for IIA Deflagration Resistance，Type Certification for IIB Deflagration Resistance，ATEX Type Certification
Applicable Standards
GB 5908-2024
ISO 16852、SH/T 3413-2019
EN ISO 16852-2016、EN 1127-1-2019
Parameter
| Parameter | Standard Version | Premium Version | Remarks |
|---|---|---|---|
| Nominal Diamete | DN25 ~ DN1200 | Customizable | Matches pipeline nominal diameter |
| Pressure Class | PN10/16/25/40 | PN16 ~ PN40 | High pressure ≥6.4MPa available by customization |
| Design Temperature | -40℃ ~ 400℃ | -60℃ ~ 450℃ | 316L / Duplex steel for high-temperature service |
| Flame Arrest Grade | Deflagration-resistant (Group IIA/IIB) | Dual grade IIA & IIB | Group IIC requires detonation-resistant type |
| MESG Clearance | ⅡA＜0.9mm；ⅡB＜0.5mm | ⅡA≤0.8mm；ⅡB≤0.45mm | Safety margin: 0.8–0.9 times |
| Deflagration Resistance Test | Passes 6 consecutive deflagration tests | 6 deflagration tests + 1-hour burn resistance | GB 5908-2024 |
| Pressure Drop | ≤5kPa（DN100，10m/s） | ≤3kPa | Lower value represents better performance |
| Burn Resistance Duration | End fitting: 1h; In-line: ≤10min | End fitting: 1.5h | Test medium: Propane 4%±0.4% volume concentration |
| Explosion-proof Mark/td> | Exd ⅡBT4 | Exd ⅡBT6 | Suitable for chemical hazardous explosion zones |
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