ASME A112.14.4:2001 pdf download GREASE REMOVAL DEVICES
1 GENERAL
1.1 Scope
This Standard establishes requirements for greaseinterceptors that are equipped with automatic greaseremoval devices (GRD). It includes testing requirementsand 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 fromsanitary discharges without intervention from the userexcept for maintenance.
Semiautomatic devices are not addressed in thisStandard.
1.2 Units of Measurement
values are stated in U.S. Customary units and theInternational System (SI) units. The U.s. Customaryunits shall be considered as the standard.
In this Standard,gallons (U.S. liquid) per minute isabbreviated gpm and liters (metric liquid) per minuteis abbreviated L/min.
1.3 Reference Standards
product that is tested to the requirements of thisStandard shall satisfy the requirements of the followingstandards as applicable (the latest edition shall apply):ASTM A888，Hubless Cast Iron Soil Pipe and Fittingsfor Sanitary and Storm Drain,Waste, and Vent PipingApplications
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 53222-3219ASME 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,NY10016-5990
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 greaseloil removal device (GRD): a plumb-ing appliance that is installed in the sanitary drainagesystem in order to intercept free-floating fats，oils，andgrease from waste water discharges. Such equipmentoperates on a time- or event-controlled basis and hasthe ability to remove the entire range of commonlyavailable free-floating fats, oils, and grease automaticallywithout 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 shallautomatically remove fats,oils，and grease from theseparation chamber to a point outside of the GRD.The removal process shall be such that the removedfats，oils，and grease shall be 95% by volume free ofwater when tested according to this Standard.
2.1.2 Size. The flow and grease retention of eachGRD shall be tested and rated in accordance withASME A112.14.3.
2.1.3 Inlet and Outlet Connections. The inletand outlet connections of the GRD shall be eitherfemale pipe thread or a plain end diameter to allowhubless’coupling connections. Tapered threads shallcomply withASME B1.20.1.Hubless connections shallcomply with the outside dimension for the given pipesize in accordance with ASTM A888.
2.2 Installation Instructions
Each GRD shall be provided with complete installa-tion instructions，including but not limited to the fol-lowing:
(a)Flow control and/or vent requirementsb) Separate trapping requirements
(c) Elevation and accessibility requirements(d) Safety and health-related instructions
(e) Wiring instructions to reference national orlocal codes
f Cleanout locations
(g) Instructions that show the clearances requiredfor maintenance，cleaning, and prevention of hazards2.3 Maintenance and Operating Instructions
Each GRD shall be provided with service instructions,which include a trouble shooting guide as well asinstructions for performing necessary servicing or ob-taining outside servicing. Units shall be provided withcomplete maintenance and operating instructions.
2.4 Electrical Requirements
All electrical components used in the GRD shallconform to the appropriate standards listed in para. 1.3.
TESTING
3.1 General
The following test protocol has been established inorder to demonstrate that the GRD is capable of remov-ing accumulated grease in the amount equal to 100%of its rated capacity within 24 hr and to establish thatthe removed grease contains no more than 5% waterby volume.
3.2 Description of Test Setup3.2.1 Test Stand
a) The GRD to be tested shall be installed on thetest stand as described in ASME A112.14.3 and inFig. 1.The grease discharge shall be connected to orshall feed a container of sufficient size to hold 150%of the rated capacity of fats，oils，and grease from theGRD.This container shall be positioned in a locationrecommended by the manufacturer of the GRD in theinstallation instructions for the product.
(b) The GRD shall be connected to an appropriateelectrical supply as described in the installation instruc-tions and as required on the electrical data plate on
ASME A112.14.4:2001 pdf download
