1、Designation: F2021 11An 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 r
2、evision, 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, 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 different
4、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. Refere
5、nced Documents2.1 ASTM Standards:2D696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plastics Between 30C and 30C with aVitreous Silica DilatometerD1600 Terminology for Abbreviated Terms Relating toPlasticsD1785 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 a
7、nd FittingsD2949 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 andFittings MaterialsE84 Test M
8、ethod 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 BarriersF412 Terminology Rel
9、ating 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(SDR-PR) Based on Outside DiameterF891 Specification for Coextruded Poly(Vinyl Chloride)(
10、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 Systems3A112.6.4 Roof, Deck and Balcony Drains3A112.6.9 Siphonic Roof Drains3
11、B36.10 Standard Dimensions of Steel Pipe (IPS)32.3 ANSI/UL Standard:UL-1479 (see Test Method E814)32.4 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 Committee F17 on P
12、lastic 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, visit the ASTM web
13、site, 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.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, htt
14、p:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3. Terminology3.1 DefinitionsTerms and abbreviations as described inTerminologies F412 and D1600, respe
15、ctively, 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:3.2.1 crown, nthe elevation of the top of a pipe inner wall.3.2.2 drain, nany pipe whi
16、ch 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 wastes to a legal point of disposal. It does notinclude the mains of public sewer tr
17、eatment 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 inducing flow without pipe gradient (pitch).4. Significance and Use4.1 The informati
18、on 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 pipe andfittings in siphonic roof drainage systems where internaloperating pressures a
19、re 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 projectjurisdiction. When permitted, select the appropriate material aslisted in the plumbi
20、ng 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 plastic pipematerials only when not prohibited by fire resistance require-ments of
21、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 PVC pipe appropriate for siphonicroof drainage systems include, but are not limited
22、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 standards as Specification D2665.5.1.2 Specific types of ABS pipe include but are not limitedto: D2661and
23、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 speci-fied for approved pipe materials. Cellular-core plastic pipe (forexample, Specifications F628 and
24、 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 pipe ofwall thickness of Schedule 40 or greater (including theequivalent SDR thickness) is adequate
25、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 govern-ing plumbing code for pipe support requirements. If localcodes do not address pipe support, support plastic pipe e
26、veryfour feet on center and at every change in direction. Braceplastic 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 siphonic
27、roof 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 when the warm pipe in a heated buildingis filled with a cold rain. Therefore, a total temperaturediffe
28、rence 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 Method D696.Intheabsence of manufacturer data, use the following rates asexpressed in ft/ft/F (cm/
29、cm/C). ABS: 5.7 3 10-5(10.3 310-5); PVC: 3.0 3 10-5(5.2 3 10-5); HDPE: 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 ap
30、art 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 andfloors must be fire
31、 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 beinstalled by qualified
32、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 to ANSI/ASMEA112.6
33、.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 Roughness Value:5.7.1 Energy loss calculations for siphonic roof drainagesystems should b
34、e 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” pipe condition, an absolute roughnessvalue of 0.000005 ft (0.00152 mm) is recommended.
35、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 provided by either concentric or eccentricreducer fittings.5.8.2 The increase of pipe di
36、ameter 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 pipe and fitting specification(s) of theinstalled pipe to ensure the specified pipe prod
37、uct 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 installed.5.9.4 Verify that piping has been connected to all roofdrains.6. Test Methods6.1 Ge
38、neralThere 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, pressure test the drainage systempiping in accordance with the procedure(s) in the governi
39、ngplumbing 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 pressure testing ofplastic piping systems.7. Keywords7.1 ABS; DWV; pipe fittings; plastic
40、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 this standard. (Approved August 1, 2011.)(1) Sections 2.1, 5.1.2 and 5.1.3 were edited
41、 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 are expressly advised that determination of the validity of any such patent rights, and t
42、he 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 reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision
43、of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shoul
44、dmake 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 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F2021 113
