1、Designation: F2021 17 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.1.4 This int
5、ernational standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT)
6、 Committee.2. Referenced 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) PlasticP
7、ipe, Schedules 40, 80, 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 FittingsD2949 Specification for 3.25-in. Outside Diameter Po
8、ly(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 MaterialsE84 Test Method for Surface Burning Characteristics ofBuilding Material
9、sE814 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 BarriersF412 Terminology Relating to Plastic Piping SystemsF628 Specification for Acrylon
10、itrile-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 Poly(Vinyl Chloride)(PVC) Plastic Pipe With a Cellular CoreF1901 Specification for
11、 Polyethylene (PE) Pipe and Fittingsfor Roof Drain Systems2.2 ANSI/ASME Standards:3A112.20.2 Qualification of Installers of Firestop Systemsand Devices for Piping SystemsA112.6.4 Roof, Deck and Balcony DrainsA112.6.9 Siphonic Roof DrainsB36.10 Standard Dimensions of Steel Pipe (IPS)2.3 ANSI/UL Stand
12、ard:UL-1479 (see Test Method E814)32.4 Other References:International Building Code (IBC)4International Plumbing Code (IPC)41This guide is under the jurisdiction of ASTM Committee F17 on Plastic PipingSystems and is the direct responsibility of Subcommittee F17.63 on DWV.Current edition approved Nov
13、. 1, 2017. Published November 2017. Originallyapproved in 2000. Last previous edition approved in 2011 as F2021 11. DOI:10.1520/F2021-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
14、nformation, 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, http:/www.ansi.org.4Available from International Code Council (ICC), 500 New Jersey Ave., NW,6th Floor, Washington,
15、DC 20001, http:/www.iccsafe.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 StatesThis international standard was developed in accordance with internationally recognized pr
16、inciples on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Uniform Plumbing Code (UPC)5NFPA 5000 Building Code63. Terminology3.1 De
17、finitionsTerms 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 This Standard:3.2
18、.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,or other liquid w
19、astes 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 pipesystem thereby i
20、nducing 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 limitations of plastic pip
21、e 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 systems in the projectj
22、urisdiction. 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 material approval, use
23、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 Specific types of P
24、VC 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 shall be used as it shares the same manufac-turing standards as Specific
25、ation D2665.5.1.2 Specific types of ABS pipe include but are not limitedto: D2661.5.1.3 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 speci-fied for approved pip
26、e materials. Cellular-core plastic pipe (forexample, Specifications F628 and F891) shall be avoidedunless the respective pipe product manufacturer can certify bytesting that the pipe product can withstand full vacuuminternally without collapse. Solid wall plastic pipe of wallthickness of Schedule 40
27、 or greater (including the equivalentSDR thickness) is adequate for siphonic roof drain systemsub-atmospheric pressure regimes. Pipe wall thicknesses lessthan Schedule 40 shall not be specified.5.3 Hangers, Supports and BracingRefer to the governingplumbing code for pipe support requirements. If loc
28、al 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 Thermal Displacement and Expansion Fitt
29、ings:5.4.1 The normal mode of thermal transition in siphonicroof drainage systems is from room temperature to a 40F(4.4C) minimum resulting in an overall contraction of plasticpiping in siphonic roof drainage systems. This occurs when thewarm pipe in a heated building is filled with a cold rain.Ther
30、efore, a total temperature difference of 50F (10C) shallbe assumed in calculating overall changes in pipe length due tothermal contraction.5.4.2 Obtain the rate of thermal expansion from pipe manu-facturer data as determined by Test Method D696.Intheabsence of manufacturer data, use the following ra
31、tes 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 particularlyimportant for pipe sections that pass through fire rated wallswhere m
32、ovement 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 Fire Stopping:5.5.1 Plastic piping passing through fire rated walls and
33、floors 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 Test MethodE1966 and Practice E2393. Fire stop assemblies should beinst
34、alled 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 displace-ment at these locations.5.6 Connection to Roof DrainsRefer
35、 to ANSI/ASMEA112.6.9 for information related to the method(s) of connec-tion of piping to siphonic roof drain outlets. A threaded5Available from International Association of Plumbing and MechanicalOfficials, 4755 E. Philadelphia St., Ontario, CA 91761, http:/www.iapmo.org.6Available from National F
36、ire Protection Association (NFPA), 1 BatterymarchPark, Quincy, MA 02169-7471, http:/www.nfpa.org.F2021 172connection is preferred by means of an appropriate thread bysocket adaptor coupling.5.7 Roughness Value:5.7.1 Energy loss calculations for siphonic roof drainagesystems shall be based on the abs
37、olute roughness value for thespecified pipe material. Evaluation of system performance forboth the “new” and the “aged” condition of the pipe inner wallis recommended.5.7.2 For the “new” pipe condition, use an absolute rough-ness value of 0.000005 ft (0.00152 mm).5.7.3 For the “aged” pipe condition
38、use an absolute rough-ness value of 0.00002 ft (0.0061 mm).5.8 Reducers and Increasers:5.8.1 The increase or reduction of pipe diameter in verticalorientations shall be provided by either concentric or eccentricreducer fittings.5.8.2 The increase of pipe diameter in horizontal orienta-tions shall be
39、 provided with eccentric reducer fittings with the“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.
40、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 installed.5.9.4 Verify that piping has been connected to all roofdrains.6. Test Methods6.1 GeneralThere are no operational test methods u
41、sedfor 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, pressure test the drainage systempiping in accordance with the procedure(s) in the governingplumbing code for drainage systems.6.2.2 T
42、he designer shall specify 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; siph
43、onic roof drainageSUMMARY OF CHANGESCommittee F17 has identified the location of selected changes to this standard since the last issue (F202111)that may impact the use of this standard.(1) Section 2, deleted D2751 reference, standard was with-drawn in 2014.(2) 5.1.1, removed passive language and ch
44、anged may toshall(3) 5.1.2, reworded and deleted D2751 reference.(4) 5.2, removed passive language, changed shouldto shall,and remove Generally,.(5) 5.4.1, reworded and rounded F to C conversion to wholevalues per D618.(6) 5.6, reworded.(7) 5.7.2, reworded.(8) 5.7.3, reworded.(9) 5.8.1, removed pass
45、ive language and changed may toshall.(10) 5.8.2, removed passive language and changed should toshall.(11) 6.2.2, removed passive language and changed may toshall.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this st
46、andard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be rev
47、iewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsi
48、ble technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West C
49、onshohocken, 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 173
