ASME A112.14.3 pdf download

ASME A112.14.3 pdf download.Hydromechanical Grease lnterceptors.
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.
1.3 Reference Standards
As a prerequisite for evaluation, a product that tested to the requirements ofthis Standard shall satisfy the requirements of the latest edition of the following standards, as applicable:
ASME Al 12.3.1, Stainless Steel Drainage Systems
ASME B1.20.1, Pipe Threads
Publisher: The American Society of Mechanical Engineers (ASME), Two Park Avenue. New York, NY 100 16-5990 (www.asme.org)
ASTM A53/A53M. Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated. Welded and Seamless
ASTM A888. Standard Specification for Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm Drain, Waste, and Vent Piping Applications
ASTM D2665, Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Drain, Waste, and Vent Pipe and Fittings
Publisher: American Society for Testing and Materials
(ASTM International). 100 Barr Harbor Drive, P.O.
Box C700, West Conshohocken, PA 19428.2959
(www.astm.org)
1.4 Definitions
breakdown geo.e capacity: the number of pounds or kilograms 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%.
directly connected: a grease interceptor that is designed to receive the discharge directly from fixtures without an air gap or air break and be directly or Indirectly connected to the plumbing drainage system.
3.4.2 Ratio of Lard to Water. Both compartments of the test sink(s) shall be supplied with the required volume of water (para. 3.3.3) at the temperature prescribed in para. 3.4. The test lard, within the above temperature range. shall be introduced into one compartment, during each incremental discharge, in the ratio of 1 lb (0.45 kg) of lard for each 5 gal (19 L) of water in that compartment Consequently, the proportion of lard to the total amount of water discharged from both sink compartments during each increment shall be 1 lb (0.45 kg) for each 10 gal (38 L), respectively.
3.4.3 Test Increments
(a) Each test increment shall consist of the simultaneous discharge of the water from both sink compartments and the lard from the test compartment.
(b) During the first test increment, the lard shall be poured into the No. 1 compartment (that compartment having its discharge outlet closest to the interceptor, measured along the waste pipe) and the No. 2 compartment shall discharge clear water. During the second test increment the lard shall be poured into the No. 2 compartment while the water in No. 1 compartment remains clear. This procedure of introducing the lard into alternate sink compartments shall be continued throughout the test. When multiple sinks are used, there are multiple No. 1 and No. 2 compartments. The lard shall always be introduced in the sink compartments at the ratio specified in para. 3.4.2.
3.4.4 FLow Rates. The drainage period for each increment shall be gauged and timed on the basis of the flow from the compartment containing the clear water. The flow rate from the compartment shall be computed as prescribed in para. 3.3.4 and recorded for each increment.
3.4.5 EfficIency Determinations (Minimum Grease Capacity). At the option of the manufacturer the efficiency determination shall be conducted at either the interceptor’s minimum grease capacity per Table I (see para. 3.4.7) or at the interceptor’s maximum grease capacity by determining the break down point (see para. 3.4.6).
3.4.6 Efficiency Determinations (Maximum Grease Capacity). The grease shall be removed from the skimming tank and the efficiency of the interceptor shall be computed at intervals of five increments or less until the average efficiency reaches approximately 93% and/or the incremental efficiency reaches approximately 85%.