ASME A112.14.3:2000 pdf download GREASE INTERCEPTORS
2.4 Flow Controls and/or Vents
2.4.1 The use and placement of fow controls and/or vents or air intakes for grease interceptors shall bethe option of the manufacturer.
2.4.2 When a flow control and/or vent is used duringtesting for rating a grease interceptor, the rating of theunit shall not exceed the maximum fow through theflow control.The manufacturer’s literature shall reflectthat the rating was achieved with the fow control and/or vent attached, and that the flow control and/or ventshall be installed with the unit.
3 TESTING
3.1 Construction of Test Equipment
3.1.1 Test Sink. The sink used in the tests shallhave the following inside dimensions: 8 ft (2.44 m)in length; 2 ft (0.60 m) in width; 12 in. (0.32 m)in depth. The sink shall be constructed of corrosion-resistant material and shall have two compartments.each 4 ft (1.22 m)in length. The sink shall be structurallyreinforced and supported on legs. The legs shall be ofproper length so that the rim of the sink will be 3 ft(0.91 m) above the foor. The sink legs shall bestructurally braced.
Two sinks of the above description shall be usedwhen tests are conducted for flow rates greater than50 gpm (190 L/m) but not exceeding 100 gpm (380L/m).
3.1.1.1 Sink Waste Connections. Each sinkcompartment shall be fitted with a 1/ in.(38 mm)standard sink waste connection with flange, crossbars.threaded or slip joint tailpiece,and locknut. The wasteconnections shall be located on opposite sides of thecenter partition in the corner formed by the side ofthe sink and the center partition.
3.1.1.2 Water Level Gauges. Each compartment shall be equipped with a gauge connection anda water level gauge with gauge glass. Each gaugeconnection shall be fitted into the bottom of a sinkcompartment and in close proximity to the waste outletEach gauge shall be mounted on the outside of thesink, adjacent to its respective gauge connection,andshall extend diagonally upward from the bottom center to the top outside corners. These gauges shall becalibrated to read directly the number of inches ofwater in the sink compartments above the sink wasteflange.
3.1.1.3 Movable Sink Partitions. Each com-partment of the sink shall be fitted with a movablepartition,making it possible to regulate the size of thecompartment to any desired capacity.
3.1.2 Skimming Tank. The skimming tank shallbe rectangular in shape; open at the top and equippedwith a stationary baffle located approximately 3 ft (0.91m) from the end of the tank receiving the dischargefrom the interceptor. This baffle shall extend the widthof the tank and to within 4 in. (100 mm) of the bottomof the tank. The purpose of this baffle shall be to limitthe heavy spread of grease to one end of the tank andto control to a degree the turbulent water currentscreated by the overflow from the interceptor. Thedimensions of the tank shall be approximately 8 ft(2.44 m) in length,28 in.(0.70 m) in width,and 32in.(0.81 m) in depth. The tank shall be constructedof galvanized sheet or corrosion-resistant metal withstructural reinforcement. The waste outlet from the tankshall be 4 in.(100 mm) in diameter, connected to thebottom of the tank at one end and trapped to retainapproximately 26 in. (0.66 m) of water in the tank.The tank shall also be provided with a 4-in.(100 mm)valved bottom drain to permit draining and cleaning.
3.2 Installation of Testing Equipment
3.2.1 Direct Connection Test Types A, B, andC.See Figs.l and 2.
3.2.1.1 Waste Piping.The combined horizontalwaste, vertical waste riser, interceptor inlet, and dis-charge piping shall be 2 in. (50 mm) for test flowsof 50 gpm (190 L/m) or less and 3 in. (76 mm) fortest flows over 50 gpm (190 L/m).
ASME A112.14.3:2000 pdf download
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