UL 92-2020 pdf download.Fire Extinguisher, Booster, and Noncollapsible Standpipe Hose and Hose Assemblies. 4.2 Thicknesses 4.2.1 The thickness of a tube shall not be less than 0.060 inch (1.52 mm), and that of a cover
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UL 92-2020 pdf download.Fire Extinguisher, Booster, and Noncollapsible Standpipe Hose and Hose Assemblies. 4.2 Thicknesses 4.2.1 The thickness of a tube shall not be less than 0.060 inch (1.52 mm), and that of a cover
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