UL 203-2020 pdf free download

UL 203-2020 pdf free download.Pipe Hanger Equipment for Fire Protection Service.
7,1 Hangers and their components shall be made of ferrous materials,
Exception: When nonferrous materials, for example. plasttcs, are used, they shall be investigated to evaluate their resistance to external fire exposure and effects of aging.
8 Protective Coatings
8.1 When a hanger or part of a hanger is made of flat iron or steel, the thickness of the metal, unless protected by coating as described in, shall be at least 4.8 mm (3/16 inch).
Exception No. 1: Retaining strap material for a C clamp fabricated from unprotected flat steel not less than 3.2 mm (1/8 inch) #11 gauge (nominal 0.120 inches) thick.
Exception No. 2: Clevis-type hangers and other flat iron hangers, fabricated from steel at least 3.2 mm (1/8 inch) #11 gauge (nominal 0.120 inches) thick and at least 2. 4 mm (1 inch) wide and when the support (hanger) exhibits strength values, under test. of 1-1/2 times the load requirements specified by Table 12.1 or Table 12.2 as applicable.
Exception No. 3: C” clamps that are 1) fabricated from not less than 3.2 mm (1/8 inch) #11 gauge
(nominal 0.120 inches) thick unprotected steel and formed of a double thickness so as to create at least a
6.4 mm (1/4 inch) thick section at the throat of the clamp, and 2) when the clamp exhibits strength values.
undertest, of 1-1/2 times the load requirements specified by Table 12.1 or Table 12.2 as applicable.
Exception No. 4: Pressed-steel concrete inserts fabricated from unprotected steel not less than 3.2 mm (1/8 inch) #11 gauge (nominal 0.120 inches) thick when it complies with all other applicable requirements.
8.2 With reference to the requirements ofj, the following coatings meet the intent of this requirement:
a) A zinc coating having a minimum thickness of 0.0 127 mm (0.0005 inch) on all outside surfaces and 0.0076 mm (0.0003 inch) on all inside surfaces. The thickness of the coating is to be established by the Metallic Coating Thickness Test. Section 9.
b) A hot-dipped mill galvanized sheet steel conforming with the coating designation G90 in Table I of the Standard Specification for Steel Sheet. Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process, A6531A653M, with not less than 40 percent of the zinc on any side, based on the minimum single spot test requirement in this ASTM Designation. The weight of the zinc coating is to be determined by any equivalent method: however, in case of question, the weight of the coating shall be established in accordance with the test method of the Standard Test Method for Weight (Mass) of Coating on Iron or Steel Articles with Zinc or Zinc-Alloy Coatings.UL 203-2020 pdf free download.