UL 2901-2019 pdf free download

UL 2901-2019 pdf free download.Antifreeze Solutions for Use in Fire Sprinkler Systems.
14.2 Coupons of ASTM A108. Grade 1010 steel and ASTM B16, H02 (Half Hard) brass are to be immersed in a water solution with a conductivity of 1,000 pSiemenslcm. at 70 ±5° F (21 ±3° C) in accordance with ASTM G71. Standard Guide for Conducting and Evaluating Galvanic Corrosion Tests in Electrolytes. A voltmeter with an analog input Impedance of I GO is to be connected to each metallic sample and the voltage measured.
14.3 Coupons of each combination of metallic materials in 4.j (a) — (e) are to be immersed in each formulation and concentration of antifreeze solution at 70 ±5°F (21 ±3°C) In accordance with ASTM G71, Standard Guide for Conducting and Evaluating Galvanic Corrosion Tests In Electrolytes. A voltmeter with a minimum impedance of 1 GO is to be connected to each metallic sample, the voltage measured and compared to the voltage obtained in 142.
15 CompatibIlity with Polymeric Materials
15.1 Antifreeze solutions intended for use with specific polymeric matenals referenced in the manufacturer’s installation Instructions shall not cause the material tensile strength of the polymeric material to be reduced by more than 30 percent when tested In accordance with 1 through i.
15.2 In addition to 15.1. chlonnated polyvinyl chloride (CPVC) and cross.iinked polyethylene (PEX) piping materials shall comply with 28.2 of the Standard for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service, UL 1821. when tested for 1000 h, pressunzing the piping with each concentration of antifreeze solution rather than water.
15.3 Tensile strength specimens of each polymeric material being tested are to be prepared in accordance with the Standard for the Test Method for the Tensile Properties of Plastics, ASTM 0638.
15.4 The polymeric tensile strength specimens are to be immersed in the antifreeze solution and maintained at a temperature of 189 ±4°F (87 ±2°C) for 90 days.
15.5 After the exposure, the tensile strength test specimens are to be conditioned for at least 24 h at 70
±5° F (21 ±3°C) and 50 percent relative humidity prior to tensile testing. After this conditioning, tensile
strength testing shall be conducted in accordance with ASTM D638 using a crosshead speed applicable to
the materials being tested.
16 CompatibilIty with Organic Coatings
16.1 An antifreeze solution Intended for use with specific coatings referenced In the manufacturers
Installation instructions shall show no signs of disbondment. blistering, or base material corrosion outside
of the scribed area when tested at the minimum and maximum concentration in accordance with 16.2 —
16.4.
16.2 Four specimens of combined coating material/base material, each measuring 4 by 4 inches (102 by
102 mm), are to be used for this test. UL 2901-2019 pdf free download.