Browse & Buy UL Standards
Standard 521, Edition 7

Standard for Heat Detectors for Fire Protective Signaling Systems

UL CSDS Proposal
Standard 521, Edition 7 Edition Date: August 26, 2016
Summary of Topics b0521_7_20160826_sum.html

Subject 521

Bulletin Dated: August 26, 2016

SUMMARY OF TOPICS

The following changes in requirements to the Standard for Heat Detectors for Fire Protective Signaling Systems, UL 521, are being proposed:

1. Alternative Paintbrush Marking for "Do Not Paint" Requirement

2. Updates to Referenced ASTM Standards

Back to Standard 521, Edition 7

The cost to purchase this Standard varies depending on whether you are ordering a hardcopy, PDF or combination of the two. We also offer two different types of subscriptions: a one year and a three year.

You will be able to choose your purchase options on the following pages.

×
×
×
×
×

You have one or more subscriptions that will expire soon.

×

You have one or more licenses to assign

×