ASME A112.14.3:2000 pdf free download

ASME A112.14.3:2000 pdf free download.GREASE INTERCEPTORS.
ASME A112.14.3 covers gencral product requirements as well as the performance criteria for thc testing and rating of grease interceptors, whose rated flows are 100 gpm (380 Urn) or less.
1.2 Units of Measurement
Values are stated in U.S. Custoniarv units and in the International System of Units (SI). The u.S. Customary units shall be considered as the standard.
In this Standard. gallons (U.S. liquid per minute is abbreviated gprn, and liters (metric liquid) per minute is abbreviated Urn.
1.3 Reference Standards
As a prerequisite for evaluation, a product that tested to the requirements of this Standard shall satisfy the requirements of the latest edition of the following standards, as applicable:
ASMF. BI.20.l. Pipe Threads
Publisher: The American Society of Mechanical Ingineers (ASME), Three Park Avenue. New York, NY 10016.5990
ASTM A888. Hublcss Cast Iron Sanitary Systems Publisher: The American Society for Testing and Materials (ASTM). 100 Barr Harbor Drive, West Consho. hocken, PA 19428
1.4 DefinItions
hrectIv c(mnecfrd: a grease interceptor that is tie- signed to be directly connected to the plumbing drainage system.
flow control, unvenied: a device installed upstream from or within the interceptor, having an orifice that controls the rate of how through the interceptor.
Al GENERAL
Realizing the need for uniform sizing. installation. and mairnenance data for grease interceptors conforming to the testing and rating procedures outlined in ASME Al 12.14.3-2000. the following information has been provided in this Appendix. The recommendations for sizing, installation, and maintenance of grease interceptors contained in this Appendix are based on input from the Plumbing and Drainage Institute (PDI).
A2 SIZING
A2.l Sizing Considerations
A2.l.l A grease interceptor conforming to ASME Al 12.14.3-2000 is designed to operate efficiently at its rated capacity. The larger the interceptor, the higher the flow rate it will handle efficiently, with a greater quantity of grease retained before cleaning is required. While a small interceptor, undersized, can accommodate a flow of waste water well in excess of its rated capacity. it will not intercept grease efficiently under such overload conditions.
A2.l.2 The fixture drainagc period in combination with the service required and the quantity of wastewater involved, establishes the rate of flow through the grease interceptor. Flow rate is iherefor the primary gauge; and the flow rate establishes interceptor size or capacity.
A2.l.3 In general. the link between flow rate and installation to produce satisfactory grease interceptor operation is a flow control and/or vent fitting. A correctly sized grease interceptor will not regulate the flow of water discharged from the fixture it is serving. Therefore. to ensure that the flow rate does not exceed the grease interceptor’s rated capacity, a flow control and/or vent fitting is required fbr some product designs. The flow control and/or vent fitting is essential in some designs for protection against overloading the grease interceptor which could otherwise occur from sudden surges from the fixture. The flow control and/or vent fitting will control the flow of wasic water at all times, enabling the interceptor to operate at its rated capacity.
A2.2 Size Symbols
It has been determined through the testing and rating procedure that ten (10) ditTerent sized intercepwrs are required for normal domestic, commercial, and institutional installations. These sizes are based on standard flow rates and grease retention capacity ratings for grease interceptors. (See Table I, ASME Al 12.14.3- 2000). Table Al lists the size symbol for each of the standard rated grease intcrccptors.
A2.3 Sizing Procedure
Table A2 shows the standard formula in steps 11r sizing grease interceptors to suit requirements of specific fixtures. An example of this sizing fonnula application is included to illustrate the steps.
A2.4 Selection
Table A3 is included as a selection chart for standard grcasc intcrccptors. rated at 50 gpm or less, applicable to various size fixtures commonly used in domestic.