Annulus (firestop)

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The annulus, or annular space, is the space between a penetrant and anything that surrounds it, such as the sides of an opening or a sleeve, as the case may be.^[1] It is named after the corresponding geometric concept due to its shape.

References

^ "Fire Stop Technologies". firestopstl.com. Retrieved 2024-01-15.

External links

External examples of the use of the term.

Annulus, a term used within a firestop patent
Annulus, as used in UL System C-AJ-1557 Firestop System, Configuration A

v t e Fire protection
Fundamental concepts	Backdraft Boiling liquid expanding vapor explosion (BLEVE) Boilover Combustibility and flammability Conflagration Dangerous goods (HAZMAT) Deflagration Detonation Dust explosion Enthalpy of vaporization Explosive Fire class Fire control Fire loading Fire point Fire triangle Flammability diagram Flammability limit Flammable liquid Flashover Flash point Friction loss Gas leak Heat transfer Jet fire K-factor (fire protection) Pool fire Pyrolysis Spontaneous combustion Structure fire Thermal radiation Water pressure
Technology	Active fire protection Automatic fire suppression Condensed aerosol fire suppression Detonation flame arrester External water spray system Fire bucket Fire prevention Fire protection Fire retardant Fire-retardant fabric Fire retardant gel Fire-safe polymers Fire safety Fire sprinkler system Fire suppression system Firefighting foam Flame arrester Flame retardant Flashback arrestor Fusible link Gaseous fire suppression Hypoxic air technology for fire prevention Inerting system Intumescent Passive fire protection Personal protective equipment (PPE) Relief valve Spark arrestor Tank blanketing Vehicle fire suppression system
Building design	Annulus (firestop) Area of refuge Booster pump Compartmentalization (fire protection) Crash bar Electromagnetic door holder Electromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape Fire extinguisher Fire hose Fire hydrant Fire pump Fire sprinkler Firestop Firestop pillow Firewall (construction) Grease duct Heat and smoke vent Occupancy Packing (firestopping) Penetrant (mechanical, electrical, or structural) Penetration (firestop) Pressurisation ductwork Safety glass Smoke control Smoke damper Smoke exhaust ductwork Smokeproof enclosure Standpipe (firefighting)
Fire alarm systems	Aspirating smoke detector Carbon monoxide detector Circuit integrity Explosive gas leak detector Fire alarm call box Fire alarm control panel Fire alarm notification appliance Fire drill Flame detector Heat detector Manual fire alarm activation Smoke detector
Professions, trades, and services	Duct cleaning Fire insurance Fire protection engineering Fireproofing Fire-resistance rating Fire Safety Evaluation System (FSES) Fire test Kitchen exhaust cleaning Listing and approval use and compliance Sprinkler fitting
Industry organizations	Fire Equipment Manufacturers' Association (FEMA) Institution of Fire Engineers (IFE) National Council of Examiners for Engineering and Surveying (NCEES) National Fire Protection Association (NFPA) Society of Fire Protection Engineers (SFPE) Underwriters Laboratories (UL)
Standards	CE marking EN 3 EN 54 EN 16034 Flame spread GHS hazard statements GHS precautionary statements Life Safety Code (NFPA 101) List of R-phrases List of S-phrases Safety data sheet UL 94
Awards	Arthur B. Guise Medal Harry C. Bigglestone Award
See also	Template:Fire Template:Firefighting Template:HVAC
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