1、Designation: F 2021 06An American National StandardStandard Guide forDesign and Installation of Plastic Siphonic Roof DrainageSystems1This standard is issued under the fixed designation F 2021; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide covers design and installation considerationsfor plastic siphonic roof drain system
3、s for industrial, commer-cial, public, and residential buildings. Requirements for mate-rials, pipe, and fittings are included.1.2 The interchangeability of pipe and fittings made bydifferent manufacturers is not addressed in this guide. Transi-tion fittings for joining pipe and fittings of differen
4、t manufac-turers is provided for in the referenced pipe and fittingspecification.1.3 In referee decisions, the SI units shall be used formetric-sized pipe and inch-pound units for pipe sized in the IPSsystem (ANSI B36.10). In all cases, the values given inparentheses are for information only.2. Refe
5、renced Documents2.1 ASTM Standards:2D 696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plastics Between 30C and 30C with aVitreous Silica DilatometerD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 1785 Specification for Poly(Vinyl Chloride) (PVC) Plas-tic Pipe, Schedules
6、 40, 80, and 120D 2104 Specification for Polyethylene (PE) Plastic Pipe,Schedule 40D 2282 Specification for Acrylonitrile-Butadiene-Styrene(ABS) Plastic Pipe (SDR-PR)D 2447 Specification for Polyethylene (PE) Plastic Pipe,Schedules 40 and 80, Based on Outside DiameterD 2661 Specification for Acrylon
7、itrile-Butadiene-Styrene(ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipeand FittingsD 2665 Specification for Poly(Vinyl Chloride) (PVC) Plas-tic Drain, Waste, and Vent Pipe and FittingsD 2751 Specification for Acrylonitrile-Butadiene-Styrene(ABS) Sewer Pipe and FittingsD 2949 Specification for
8、3.25-in. Outside Diameter Poly-(Vinyl Chloride) (PVC) Plastic Drain, Waste, and VentPipe and FittingsD 3034 Specification for Type PSM Poly(Vinyl Chloride)(PVC) Sewer Pipe and FittingsD 3350 Specification for Polyethylene Plastics Pipe andFittings MaterialsE84 Test Method for Surface Burning Charact
9、eristics ofBuilding MaterialsE 814 Test Method for Fire Tests of Through-PenetrationFire StopsE 1966 Test Method for Fire-Resistive Joint SystemsE 2393 Practice for On-Site Inspection of Installed FireResistive Joint Systems and Perimeter Fire BarriersF 412 Terminology Relating to Plastic Piping Sys
10、temsF 628 Specification for Acrylonitrile-Butadiene-Styrene(ABS) Schedule 40 Plastic Drain, Waste, and Vent PipeWith a Cellular CoreF 714 Specification for Polyethylene (PE) Plastic Pipe(SDR-PR) Based on Outside DiameterF 891 Specification for Coextruded Poly(Vinyl Chloride)(PVC) Plastic Pipe With a
11、 Cellular CoreF 1901 Specification for Polyethylene (PE) Pipe and Fit-tings for Roof Drain Systems2.2 ANSI/ASME Standards:A112.20.2 Qualification of Installers of Firestop Systemsand Devices for Piping Systems3A112.6.4 Roof, Deck and Balcony Drains3A112.6.9 Siphonic Roof Drains3B36.10 Standard Dimen
12、sions of Steel Pipe (IPS)32.3 ANSI/UL Standard:UL-1479 (see Test Method E 814)32.4 Other References:International Building Code (IBC)International Plumbing Code (IPC)Uniform Building Code (UBC)Uniform Plumbing Code (UPC)NFPA 5000 Building Code1This guide is under the jurisdiction of ASTM Committee F
13、17 on Plastic PipingSystems and is the direct responsibility of Subcommittee F17.63 on DWV.Current edition approved April 1, 2006. Published April 2006. Originallyapproved in 2000. Last previous edition approved in 2000 as F 2021 00.2For referenced ASTM standards, visit the ASTM website, www.astm.or
14、g, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1Copyright ASTM Inter
15、national, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 DefinitionsTerms and abbreviations as described inTerminologies F 412 and D 1600, respectively, shall apply inthis guide. General terminology pertaining to roof drains asdescribed in ANSI/
16、ASME A112.6.4 and ASME A112.6.9 shallalso apply in this guide.3.2 Definitions of Terms Specific to This Standard:3.2.1 crown, nthe elevation of the top of a pipe inner wall.3.2.2 drain, nany pipe which carries rain water, wastewater or waterborne wastes in a building drainage system.3.2.3 drainage s
17、ystem, nincludes all the piping withinpublic or private premises, which conveys sewage, rain water,or other liquid wastes to a legal point of disposal. It does notinclude the mains of public sewer treatment or disposal plants.3.2.4 siphonic roof drain, na roof drain with a fixeddevice allowing water
18、 to enter without the ingress of air thatsustains a negative differential fluid head within the pipesystem thereby inducing flow without pipe gradient (pitch).4. Significance and Use4.1 The information provided in this standard guide isintended for use by designers and specifiers of siphonic roofdra
19、inage systems and their related components. Specifically,this guide addresses the use and limitations of plastic pipe andfittings in siphonic roof drainage systems where internaloperating pressures are typically sub-atmospheric.5. Procedure5.1 GeneralRefer to the governing plumbing code (forexample,
20、 IPC, UPC) to determine if plastic pipe and fittings arepermitted for building roof drainage systems in the projectjurisdiction. When permitted, select the appropriate material aslisted in the plumbing code that is approved for roof drainageapplications. Use of plastic pipe materials not approved by
21、 thegoverning code must be approved by the local authority havingjurisdiction. Regardless of material approval, use plastic pipematerials only when not prohibited by fire resistance require-ments of the governing building code (that is, NFPA 5000,IBC, UPC). Pipe materials must also meet the fire res
22、istiverequirements as specified in the building code and as deter-mined by Test Method E84.5.1.1 Specific types of PVC pipe appropriate for siphonicroof drainage systems include, but are not limited to: Specifi-cations D 2665, D 2949, and D 3034. When pipe diameters of212-in. (64-mm) must be specifi
23、ed, Specification D 1785 plainend pressure pipe may be used as it shares the same manufac-turing standards as Specification D 2665.5.1.2 Specific types of ABS pipe include but are not limitedto: D 2282, D 2661, and D 2751.5.1.3 Specific types of PE pipe include but are not limitedto: D 2104, D 2447,
24、 D 3350, and F 714.5.2 Pipe Wall Thickness and CompositionRefer to thegoverning plumbing code for the pipe wall thicknesses speci-fied for approved pipe materials. Cellular-core plastic pipe (forexample, Specifications F 628 and F 891) should be avoidedunless the respective pipe product manufacturer
25、 can certify bytesting that the pipe product can withstand full vacuuminternally without collapse. Generally, solid wall plastic pipe ofwall thickness of Schedule 40 or greater (including theequivalent SDR thickness) is adequate for siphonic roof drainsystem sub-atmospheric pressure regimes. Pipe wa
26、ll thick-nesses less than Schedule 40 should not be specified.5.3 Hangers, Supports and BracingRefer to the govern-ing plumbing code for pipe support requirements. If localcodes do not address pipe support, support plastic pipe everyfour feet on center and at every change in direction. Braceplastic
27、pipe with lateral restraints every thirty feet on centerand at every change in direction for hanger rods longer than 18inches.5.4 Thermal Displacement and Expansion Fittings:5.4.1 The normal mode of thermal transition in siphonicroof drainage systems is typically from room temperature to aminimum of
28、 about 40F (4.4C) resulting in an overallcontraction of plastic piping in siphonic roof drainage systems.This occurs generally when the warm pipe in a heated buildingis filled with a cold rain. Therefore, a total temperaturedifference of 50F (28C) shall be assumed in calculatingoverall changes in pi
29、pe length due to thermal contraction.5.4.2 Obtain the rate of thermal expansion from pipe manu-facturer data as determined by Test Method D 696.Intheabsence of manufacturer data, use the following rates asexpressed in ft/ft/F (cm/cm/C). ABS: 5.7 3 10-5(10.3 310-5); PVC: 3.0 3 10-5(5.2 3 10-5); HDPE:
30、 10.0 3 10-5(18.03 10-5).5.4.3 Specify appropriate telescopic expansion fittings toaccount for pipe thermal displacement. This is particularlyimportant for pipe sections that pass through fire rated wallswhere movement can pull apart fire stopping assemblies. Suchtelescoping expansion joints must be
31、 able to withstand negativeinternal pressure without air infiltration. Expansion joints usedin pump suction applications are recommended5.5 Fire Stopping:5.5.1 Plastic piping passing through fire rated walls andfloors must be fire stopped with appropriate and approved firestopping assemblies as test
32、ed and certified under Test MethodE 814 (ANSI/UL 1479). Other fire resistive joint systems mustbe installed and inspected in accordance with Test MethodE 1966 and Practice E 2393. Fire stop assemblies should beinstalled by qualified personnel as specified in ANSI/ASMEA112.20.2.5.5.2 Penetrations at
33、fire rated penetrations should betreated as anchor points for the pipe system when determiningthe placement of expansion joints to prevent thermal displace-ment at these locations.5.6 Connection to Roof DrainsRefer to ANSI/ASMEA112.6.9 for information related to the method(s) of connec-tion of pipin
34、g to siphonic roof drain outlets. In general, athreaded connection is preferred by means of an appropriatethread by socket adaptor coupling.5.7 Roughness Value:5.7.1 Energy loss calculations for siphonic roof drainagesystems should be based on the absolute roughness value forthe specified pipe mater
35、ial. Evaluation of system performancefor both the “new” and the “aged” condition of the pipe innerwall is recommended.F20210625.7.2 For the “new” pipe condition, an absolute roughnessvalue of 0.000005 ft (0.00152 mm) is recommended.5.7.3 For the “aged” pipe condition an absolute roughnessvalue of 0.
36、00002 ft (0.0061 mm) is recommended.5.8 Reducers and Increasers:5.8.1 The increase or reduction of pipe diameter in verticalorientations may be provided by either concentric or eccentricreducer fittings.5.8.2 The increase of pipe diameter in horizontal orienta-tions should be provided with eccentric
37、 reducer fittings withthe “flat” side of the fitting oriented with the crown of the pipe(that is, match crowns).5.9 Inspection:5.9.1 Verify the pipe and fitting specification(s) of theinstalled pipe to ensure the specified pipe product and wallthickness have been installed.5.9.2 Ensure piping has be
38、en supported and braced asspecified by the designer.5.9.3 Verify that specified expansion fittings and fire stop-ping assemblies have been installed.5.9.4 Verify that piping has been connected to all roofdrains.6. Test Methods6.1 GeneralThere are no operational test methods usedfor installed siphoni
39、c roof drainage systems. Only pipe integ-rity testing by hydrostatic pressure is necessary.6.2 Hydrostatic System Testing:6.2.1 At a minimum, pressure test the drainage systempiping in accordance with the procedure(s) in the governingplumbing code for drainage systems.6.2.2 The designer may specify
40、a pressure test method morestringent than the plumbing code minimum as operatingpressures necessitate.6.2.3 Do not use compressed air for the pressure testing ofplastic piping systems.7. Keywords7.1 ABS; DWV; pipe fittings; plastic pipe; polyethylene;polyvinylchloride; siphonic roof drainageASTM Int
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42、y their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand sh
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44、andards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F2021063
