ASME A112.14.4-2001 pdf download

ASME A112.14.4-2001 pdf download.GREASE REMOVAL DEVICES.
1 GENERAL 1.1 Scope This Standard establishes requirements for grease interceptors that are equipped with automatic grease removal devices (GRD). It includes testing requirements and performance criteria designed to ensure confor- mance to this Standard. Such devices are designed for the purpose of automat- ically removing free-floating grease, fats, and oils from sanitary discharges without intervention from the user except for maintenance. Semiautomatic devices are not addressed in this Standard. 1.2 Units of Measurement Values are stated in U.S. Customary units and the International System (SI) units. The U.S. Customary units shall be considered as the standard. In this Standard, gallons (U.S. liquid) per minute is abbreviated gpm and liters (metric liquid) per minute is abbreviated L/min. 1.3 Reference Standards A product that is tested to the requirements of this Standard shall satisfy the requirements of the following standards as applicable (the latest edition shall apply): ASTM A888, Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm Drain, Waste, and Vent Piping Applications Publisher: American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West Consho- hocken, PA 19428-2959. ANSI/NFPA 70, National Electrical Code Publisher: National Fluid Power Association (NFPA), 3333 N. Mayfair Road, Milwaukee, WI 53222-3219 ASME A112.14.3, Grease Interceptors ASME B1.20.1, Pipe Threads, General Purpose (Inch) Publisher: The American Society of Mechanical Engi- neers (ASME), Three Park Avenue, New York, NY 10016-5990 1 ANSI/UL 499, Electrically Heated Appliances ANSI/UL 917, Electric Timers and Switches ANSI/UL 1004, Electric Motors Publisher: Underwriters Laboratories, 333 Pfingsten Road, Northbrook, IL 60062-2096. 1.4 Definition automatic grease/oil removal device (GRD): a plumb- ing appliance that is installed in the sanitary drainage system in order to intercept free-floating fats, oils, and grease from waste water discharges. Such equipment operates on a time- or event-controlled basis and has the ability to remove the entire range of commonly available free-floating fats, oils, and grease automatically without intervention from the user except for mainte- nance. The removed material is essentially water-free, which allows for recycling of the removed product. 2 GENERAL REQUIREMENTS 2.1 Construction 2.1.1 Design Considerations. The GRD shall automatically remove fats, oils, and grease from the separation chamber to a point outside of the GRD. The removal process shall be such that the removed fats, oils, and grease shall be 95% by volume free of water when tested according to this Standard. 2.1.2 Size. The flow and grease retention of each GRD shall be tested and rated in accordance with ASME A112.14.3. 2.1.3 Inlet and Outlet Connections. The inlet and outlet connections of the GRD shall be either female pipe thread or a plain end diameter to allow hubless coupling connections. Tapered threads shall comply with ASME B1.20.1. Hubless connections shall comply with the outside dimension for the given pipe size in accordance with ASTM A888.
3.2.2 Grease Delivery System (Grease Meter- ing Sink). A floor sink of sufficient volume to contain 10% of the rated grease capacity of the GRD being tested shall be connected through a ball valve to the horizontal line between the base of the vertical waste riser [ASME A112.14.3, para. 3.2.1.4(d)] and the GRD inlet (See Fig. 1). This floor sink shall be used to meter grease into the GRD. 3.2.3 Test Materials. Lard, as required in ASME A112.14.3, shall be used to conduct this test. 3.3 GRD Conditioning Prior to starting the test increments, the GRD shall be cleaned of all grease from previous tests and filled with fresh water to the static water level. The water shall be at a temperature of 70±10°F (21±6°C). All electronic and mechanical components shall be set as described in the manufacturer’s instructions for normal operation. 3.4 Grease Removal Test 3.4.1 The rated retention capacity ofthe GRD submit- ted for test shall be determined in accordance with ASME A112.14.3. 3.4.2 During the test, water at 110±5°F (43±3°C) shall be introduced to maintain static water level within the GRD during continuous operation in accordance with the manufacturer’s instructions. 3.4.3 All GRD controls shall be set in accordance with manufacturer’s instructions.