UL 181:11ED 2013-07-25

Foreword
Introduction
1 Scope
2 General
3 Construction
Performance
4 General
5 Tests for surface burning characteristics
6 Flame resistance test
7 Bending test
8 Flame penetration test
9 Burning test
10 Corrosion resistance
11 Mold growth and humidity test
12 Temperature test
13 Puncture test
14 Static load test
15 Impact test
16 Erosion test
17 Pressure test
18 Collapse test
19 Tension test
20 Torsion test
21 Leakage test
Manufacturing and production tests
22 General
Marking
23 Content
24 Instructions

This revision of ANSI/UL 181 is being issued to update the title page to reflect reaffirmation of ANSI approval.

1.1 These requirements apply to materials for the fabrication of air duct and air connector systems for use in accordance with the International Mechanical Code (IMC), International Residential Code (IRC), and Uniform Mechanical Code (UMC), Standards of the National Fire Protection Association for the Installation of Air-Conditioning and Ventilating Systems, NFPA No. 90A, and the Installation of Warm Air Heating and Air-Conditioning Systems, NFPA No. 90B.