ASME A112.14.3:2018 pdf download

ASME A112.14.3:2018 pdf download.Hydromechanical Grease Interceptors
1 GENERAL
1.1 Scope This Standard covers general product requirements as well as the performance criteria for the testing and rating ofhydromechanical grease interceptors, rated by flow in gallons per minute (gpm) or liters per minute (L/min). 1.2 Units of Measurement Values are stated in U.S. Customary units and in the International System of Units (SI). The U.S. Customary units shall be considered as the standard.1.4 Definitions breakdown grease capacity: the numberofpounds or kilo- grams of grease a grease interceptor retains at a specific flow rate at the last increment preceding two successive increments in which either the average efficiency is less than 90% or the incremental efficiency is less than 80%. directlyconnected: a grease interceptorthatis designed to receive the discharge directlyfrom fixtures withoutan air gap or air breakand be directlyor indirectlyconnected to the plumbing drainage system.flow control, unvented: a device installed upstream of or within the interceptor, having an orifice that controls the rate of flow through the interceptor. flow control, vented: a device installed upstream of the interceptor having an orifice and air intake (vent) down- stream from the orifice which allows air to be drawn into the flow. The device thatcontrols the rate offlow through the interceptor, and an air intake (vent) downstream to the interceptor. hydromechanical grease interceptor: a plumbing appurte- nance or appliance installed in a sanitarydrainage system to intercept nonpetroleum fats, oils, and greases (FOG) from a wastewater discharge; rated by flow. The design incorporates, air entrainment, hydromechanical separation, interior baffling, and/or barriers in combina- tion or separately, and one or more of the following: (a) externalflowcontrol,withairintake(vent),directly connected (b) external flow control, without air intake (vent), directly connected (c) without external flow control, directly connected (d) withoutexternal flow control, indirectly connected indirectly connected: a grease interceptor that is designed toreceivethedischargefromfixturesthroughanairgapor air break and be directly or indirectly connected to the plumbing drainage system. minimum grease capacity: the number of pounds or kilo- gramsofgreaseagreaseinterceptormustretainataspeci- fied flow rate from Table 1.
3 TESTING
3.1 Construction of Test Equipment 3.1.1 Test Sink (a) The sinks shall be constructed of corrosion resis- tant material, structurally reinforced and supported on legs. The legs shall be of such length that the rim of the sinks are 3 ft (0.91 m) above the floor. The sink legs shall be structurally braced. (b) For flow rates up to and including 50 gpm (189 L/ min) the test sinks shall be 50 gal (189 L) and have the following inside dimensions: 8 ft (2.44 m) in length, 2 ft (0.61 m) inwidth, and12 1 ∕ 2 in. (0.32 m) indepth. Thesinks shall have two compartments of equal length. (c) For flowrates above 50 gpm (189 L/min) up to and including 100 gpm (378 L/min), the test sinks shall be as follows: (1) multiples of two of the sinks specified in (b). (2) a 100 gal sink having the following dimensions: 128 in. (3.2 m) in length, 36 in. (0.91 m) in width, and 12.5 in. (0.32 m) in depth; it shall be divided into two equal compartments. (d) Forflowratesofgreaterthan100 gpm(378 L/min), two or more sinks as specified in (b) or (c) shall be used. 3.1.1.1 Sink Waste Connections. For sinks constructed per para. 3.1.1(b), each sink compartment shall be fitted with a 1 1 ∕ 2 in. (38 mm) standard sink waste connection with flange, threaded or slip joint tail- piece, and locknut. The waste connections shall be located on opposite sides of the center partition in the corner formed by the front side of the sink and the center partition. For sinks constructed per para. 3.1.1(c), each sink compartment shall be fitted with a 2 in. (51 mm) sink waste connection with flange, threaded or slip joint tail- piece, and locknut. The waste connections shall be located on opposite sides of the center partition in the corner formed by the front side of the sink and the center partition.