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UL 33

8th Edition, April 14, 2015

Complete Document

UL Standard for Safety Heat Responsive Links for Fire-Protection Service

Includes all amendments and changes through Revision Page(s) , April 14, 2015

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Product Details:

  • Revision: 8th Edition, April 14, 2015
  • Published Date: April 14, 2015
  • Status: Active, Most Current
  • Document Language: English
  • Published By: UL (UL)
  • Page Count: 22
  • ANSI Approved: Yes
  • DoD Adopted: Yes

Description / Abstract:

These requirements cover heat responsive links used for fire-protection service. These links consist of devices intended for installation under load conditions such as for use with automatic fire suppression systems; or automatic closure devices for doors, windows, dampers or smoke relief vents.

Heat responsive links are categorized by temperature rating, type of coating or plating, minimum and maximum design load, and other factors which may have a bearing on their intended use.