Publisher : UL

UL Subject 181B PDF

Standard for Closure Systems for Use With Flexible Air Ducts and Air Connectors (Bulletin, 12/23/1999)

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UL Subject 181C PDF

n>Outline of Investigation for Non-Metal Joining Accessories for Flexible Air Ducts and Air Connectors (Outline, 5/20/2020)

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UL Subject 1820 PDF

Standard for Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics (CSDS Proposal, 12/19/2008)

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UL Subject 1820 PDF

Standard for Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics (CSDS Proposal, 3/8/2013)

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UL Subject 1821 PDF

Standard for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service (CSDS Proposal, 3/17/2017)

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UL Subject 1821A PDF

Outline of Investigation for Thermoplastic Sprinkler Pipe and Fittings for Low Pressure Dry Pipe Applications (Outline, 12/16/2005)

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UL Subject 1821B PDF

Subject 1821B (Bulletin, 2/26/2014)

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UL Subject 1821B PDF

Subject 1821B (Bulletin, 12/19/2013)

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UL Subject 1821B PDF

Subject 1821B (Bulletin, 12/10/2013)

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UL Subject 1821B PDF

Subject 1821B (Bulletin, 3/8/2013)

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