In explosion protection design, the component that truly determines the level of safety is often not just the explosion vent panel itself.
Whether FM Approved accessories are used is often the real key.
This is because LS explosion venting accessories are designed and selected according to FM’s risk control logic, enabling predictable venting performance in FM-insured facilities while effectively reducing secondary hazards after an explosion.
LS-EV01 — FM Approved Explosion Vent Fastener
The LS-EV01 explosion vent fastener uses an FM Approved calibrated rupture vent washer, and its design logic complies with FM damage-limiting construction requirements (Damage-Limiting Construction, FM Data Sheet 1-44).
✔ FM Approved fastening accessory
✔ Controlled and repeatable vent opening performance
✔ Release is governed by the vent washer, while the bolt itself remains structurally intact during activation
✔ Suitable for sandwich panels, single-skin steel panels, and composite structures
This is not just a bolt.
It is an FM-recognized vent opening control component.
LS-JS900 — Post-Venting Safety Restraint Protection
Explosion venting design does not end the moment the panel opens.
The LS-JS900 restraint cable provides post-venting restraint and travel-limiting functions, preventing the vent panel from becoming a projectile and significantly reducing secondary damage to personnel, equipment, and surrounding structures — a key risk concern in FM-insured facilities.
✔ High-strength stainless steel cable
✔ Breaking force ≥22.6 kN≥22.6kN (tested in accordance with CNS 941:2015)
✔ Does not affect vent opening pressure
✔ Designed to work in combination with FM Approved explosion venting systems
Why Are FM Approved Accessories So Important?
FM evaluates risk from the perspective of insurance and loss prevention.
Using FM Approved accessories, or accessories designed in accordance with FM logic, means:
✔ More predictable explosion behavior
✔ Lower risk of secondary damage
✔ Clearer technical justification during FM review
✔ A more convincing design solution for insured facilities
Explosion venting design is not just about “releasing pressure.”
It is about releasing pressure in a way recognized by FM.
