1、Designation: F2021 11 An American National StandardStandard Guide forDesign and Installation of Plastic Siphonic Roof DrainageSystems1This standard is issued under the fixed designation F2021; 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 () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This guide covers design and installation considerationsfor plastic siphonic roof drain systems
3、 for industrial,commercial, public, and residential buildings. Requirementsfor materials, 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 different man
4、ufac-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. Reference
5、d Documents2.1 ASTM Standards:2D696 Test Method for Coefficient of Linear Thermal Expan-sion of Plastics Between 30C and 30C with a VitreousSilica DilatometerD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1785 Specification for Poly(Vinyl Chloride) (PVC) PlasticPipe, Schedules 40, 80,
6、and 120D2661 Specification for Acrylonitrile-Butadiene-Styrene(ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipeand FittingsD2665 Specification for Poly(Vinyl Chloride) (PVC) PlasticDrain, Waste, and Vent Pipe and FittingsD2751 Specification for Acrylonitrile-Butadiene-Styrene(ABS) Sewer Pipe and
7、 Fittings (Withdrawn 2014)3D2949 Specification for 3.25-in. Outside Diameter Poly(Vi-nyl Chloride) (PVC) Plastic Drain, Waste, and Vent Pipeand FittingsD3034 Specification for Type PSM Poly(Vinyl Chloride)(PVC) Sewer Pipe and FittingsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings M
8、aterialsE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE814 Test Method for Fire Tests of Penetration FirestopSystemsE1966 Test Method for Fire-Resistive Joint SystemsE2393 Practice for On-Site Inspection of Installed FireResistive Joint Systems and Perimeter Fire BarriersF4
9、12 Terminology Relating to Plastic Piping SystemsF628 Specification for Acrylonitrile-Butadiene-Styrene(ABS) Schedule 40 Plastic Drain, Waste, and Vent PipeWith a Cellular CoreF714 Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on Outside DiameterF891 Specification for Coextruded Pol
10、y(Vinyl Chloride)(PVC) Plastic Pipe With a Cellular CoreF1901 Specification for Polyethylene (PE) Pipe and Fittingsfor Roof Drain Systems2.2 ANSI/ASME Standards:A112.20.2 Qualification of Installers of Firestop Systemsand Devices for Piping Systems4A112.6.4 Roof, Deck and Balcony Drains4A112.6.9 Sip
11、honic Roof Drains4B36.10 Standard Dimensions of Steel Pipe (IPS)42.3 ANSI/UL Standard:UL-1479 (see Test Method E814)42.4 Other References:International Building Code (IBC)International Plumbing Code (IPC)Uniform Plumbing Code (UPC)NFPA 5000 Building Code1This guide is under the jurisdiction of ASTM
12、Committee F17 on Plastic PipingSystems and is the direct responsibility of Subcommittee F17.63 on DWV.Current edition approved Aug. 1, 2011. Published September 2011. Originallyapproved in 2000. Last previous edition approved in 2006 as F2021 06. DOI:10.1520/F2021-11.2For referenced ASTM standards,
13、visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Availabl
14、e from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.
15、Terminology3.1 DefinitionsTerms and abbreviations as described inTerminologies F412 and D1600, respectively, shall apply inthis guide. General terminology pertaining to roof drains asdescribed in ANSI/ASME A112.6.4 and ASME A112.6.9 shallalso apply in this guide.3.2 Definitions of Terms Specific to
16、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 system, nincludes all the piping withinpublic or private premises, which conveys sewage, rain water,
17、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 to enter without the ingress of air thatsustains a negative differential fluid head within the pip
18、esystem 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 roofdrainage systems and their related components. Specifically,this guide addresses the use and limitatio
19、ns 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, IPC, UPC) to determine if plastic pipe and fittings arepermitted for building roof drainage system
20、s 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 thegoverning code must be approved by the local authority havingjurisdiction. Regardless of materi
21、al 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 resistiverequirements as specified in the building code and as deter-mined by Test Method E84.5.1.1 Sp
22、ecific types of PVC pipe appropriate for siphonicroof drainage systems include, but are not limited to: Specifi-cations D2665, D2949, and D3034. When pipe diameters of212-in. (64-mm) must be specified, Specification D1785 plainend pressure pipe may be used as it shares the same manufac-turing standa
23、rds as Specification D2665.5.1.2 Specific types of ABS pipe include but are not limitedto: D2661and D2751.5.1.3 Specific types of PE pipe include but are not limitedto: D3350, F714, and F1901.5.2 Pipe Wall Thickness and CompositionRefer to thegoverning plumbing code for the pipe wall thicknesses spe
24、ci-fied for approved pipe materials. Cellular-core plastic pipe (forexample, Specifications F628 and F891) should be avoidedunless the respective pipe product manufacturer can certify bytesting that the pipe product can withstand full vacuuminternally without collapse. Generally, solid wall plastic
25、pipe ofwall thickness of Schedule 40 or greater (including theequivalent SDR thickness) is adequate for siphonic roof drainsystem sub-atmospheric pressure regimes. Pipe wall thick-nesses less than Schedule 40 should not be specified.5.3 Hangers, Supports and BracingRefer to the governingplumbing cod
26、e for pipe support requirements. If local codes donot address pipe support, support plastic pipe every four feet oncenter and at every change in direction. Brace plastic pipe withlateral restraints every thirty feet on center and at every changein direction for hanger rods longer than 18 inches.5.4
27、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 about 40F (4.4C) resulting in an overallcontraction of plastic piping in siphonic roof drainage systems.This occurs generally whe
28、n 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 pipe length due to thermal contraction.5.4.2 Obtain the rate of thermal expansion from pipe manu-facturer data as determined by Test
29、 Method D696.Intheabsence of manufacturer data, use the following rates asexpressed in ft/ft/F (cm/cm/C).ABS: 5.7 10-5(10.3 10-5);PVC: 3.0 10-5(5.2 10-5); HDPE: 10.0 10-5(18.0 10-5).5.4.3 Specify appropriate telescopic expansion fittings toaccount for pipe thermal displacement. This is particularlyi
30、mportant for pipe sections that pass through fire rated wallswhere movement can pull apart fire stopping assemblies. Suchtelescoping expansion joints must be able to withstand negativeinternal pressure without air infiltration. Expansion joints usedin pump suction applications are recommended5.5 Fir
31、e Stopping:5.5.1 Plastic piping passing through fire rated walls andfloors must be fire stopped with appropriate and approved firestopping assemblies as tested and certified under Test MethodE814 (ANSI/UL 1479). Other fire resistive joint systems mustbe installed and inspected in accordance with Tes
32、t MethodE1966 and Practice E2393. Fire stop assemblies should beinstalled by qualified personnel as specified in ANSI/ASMEA112.20.2.5.5.2 Penetrations at fire rated penetrations should betreated as anchor points for the pipe system when determiningthe placement of expansion joints to prevent thermal
33、 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 piping to siphonic roof drain outlets. In general, athreaded connection is preferred by means of an appropriatethread by socket adaptor coupling.5.7 Ro
34、ughness Value:5.7.1 Energy loss calculations for siphonic roof drainagesystems should be based on the absolute roughness value forthe specified pipe material. Evaluation of system performancefor both the “new” and the “aged” condition of the pipe innerwall is recommended.F2021 1125.7.2 For the “new”
35、 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 0.00002 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 p
36、rovided by either concentric or eccentricreducer fittings.5.8.2 The increase of pipe diameter in horizontal orienta-tions should be provided with eccentric 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 p
37、ipe and fitting specification(s) of theinstalled pipe to ensure the specified pipe product and wallthickness have been installed.5.9.2 Ensure piping has been supported and braced asspecified by the designer.5.9.3 Verify that specified expansion fittings and fire stop-ping assemblies have been instal
38、led.5.9.4 Verify that piping has been connected to all roofdrains.6. Test Methods6.1 GeneralThere are no operational test methods usedfor installed siphonic roof drainage systems. Only pipe integ-rity testing by hydrostatic pressure is necessary.6.2 Hydrostatic System Testing:6.2.1 At a minimum, pre
39、ssure test the drainage systempiping in accordance with the procedure(s) in the governingplumbing code for drainage systems.6.2.2 The designer may specify a pressure test method morestringent than the plumbing code minimum as operatingpressures necessitate.6.2.3 Do not use compressed air for the pre
40、ssure testing ofplastic piping systems.7. Keywords7.1 ABS; DWV; pipe fittings; plastic pipe; polyethylene;polyvinylchloride; siphonic roof drainageSUMMARY OF CHANGESCommittee F17 has identified the location of selected changes to this standard since the last issue (F202106)that may impact the use of
41、 this standard. (Approved August 1, 2011.)(1) Sections 2.1, 5.1.2 and 5.1.3 were edited to removereferences to expired standards.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard ar
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