UL-2901:2013 pdf free download – Outine of Investigation for Antifreeze Solutions tor 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 ijSiemens/cm2, at 70 ±5°F (21 ±3°C) in accordance with ASTM G71, Standard Guide for Conducting and Evaluating Galvanic Corrosion Tests in Electrolytes . A potentiometer is to be connected to each metallic sample and the voltage measured.
14.3 Coupons of each combination of metallic materials in 14.1(a) — (d) 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 potentiometer is to be connected to each metallic sample, the voltage measured and compared to the voltage obtained in 14.2.
15 Compatibility with Polymeric Materials
15.1 Antifreeze solutions intended for use with specific polymeric materials 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 15.3 through 15.5.
15.2 In addition to 15.1, CPVC and cross-linked polyethylene piping materials shall comply with 27.2 of the Standard for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service, UL 1821, when tested for 1000 hours, pressurizing 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 D638.
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 30, 60 and 90 days.
15.5 After the exposure, the tensile strength test specimens are to be conditioned for at least 24 hours 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 Toxicity
16.1 An antifreeze solution shall be considered acceptable for use in a sprinkler system based upon a toxicology assessment of the antifreeze solution constituents when used in accordance with the manufacturer’s instructions and the Standard for the Installation of Sprinkler Systems, NFPA 13.
16.2 Exposure scenarios considered as a part of the toxicology assessment are to include at least the following:
a) Release into potable water through a backf low device based upon a 5000/1 dilution of the solution into the water supply;
b) Release into an occupied space during sprinkler discharge based upon 98% percent of
sprinkler discharge having droplet sizes greater than 200 1dm;
c) Release into an occupied space during operation of a relief valve; and
d) Release into the natural environment.
16.3 The toxicological assessment with respect to human health is to be based upon exposures that are episodic and short-term in nature, and occur by ingestion, direct dermal contact, and limited inhalation of the product. A toxicological review of each ingredient used within the antifreeze solution shall be conducted.
17 Exposure to Fire
17.1 General
17.1.1 When tested in accordance with 17.2 — 17.5, a sprinkler discharging the most concentrated antifreeze solution shall not cause the total heat release rate from a heptane spray fire to increase by more than 10 percent above the heat release rate measured just prior to the discharge of the antifreeze solution, for any consecutive 15 second period throughout the antifreeze solution discharge.