1、Designation: F2737 10aAn American National StandardStandard Specification forCorrugated High Density Polyethylene (HDPE) Water QualityUnits1This standard is issued under the fixed designation F2737; the number immediately following the designation indicates the year oforiginal adoption or, in the ca
2、se of 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. Scope1.1 This specification covers materials, structural design,physical dimensions and manufacturi
3、ng requirements formonolithic or sectional corrugated high density polyethylene(HDPE) water quality units with volumes greater than or equalto 140 ft3or 1,050 gal (4,000 L).1.2 The corrugated HDPE water quality units are placed asoffline or inline treatment devices along storm drain pipe linesto rem
4、ove total suspended solids (TSS), heavy metals andphosphorous. Typical sources of pollutants include construc-tion activity, automotive transportation related wear and debrisitems, refuse, landscaping debris, agricultural activities, andother similar by-products.1.3 The values stated in inch-pound u
5、nits are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This specification covers horizontally laid corrugatedHDPE water quality units as illustrated in Fig. 1.1.5 The follow
6、ing safety hazard caveat pertains only to thetest methods portion, Section 9, of this specification. Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpra
7、ctices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D1600 Terminology for Abbreviated Terms Relating toPlasticsD3212 Specification for Joints for Drain and Sewer PlasticPipes Using Flexible Elastomeric SealsD3350 Specification for
8、 Polyethylene Plastics Pipe andFittings MaterialsF412 Terminology Relating to Plastic Piping SystemsF477 Specification for Elastomeric Seals (Gaskets) for Join-ing Plastic PipeF714 Specification for Polyethylene (PE) Plastic Pipe(SDR-PR) Based on Outside DiameterF2306/F2306M Specification for 12 to
9、60 in. 300 to 1500mm Annular Corrugated Profile-Wall Polyethylene (PE)Pipe and Fittings for Gravity-Flow Storm Sewer andSubsurface Drainage Applications2.2 Plastic Pipe Institute:3PPI TR-4 PPI Listing of Hydrostatic Design Basis (HDB),Pressure Design Basis (PDB), and Minimum RequiredStrength (MRS) R
10、atings for Thermoplastic Plastic Pipes2.3 AASHTO Standard4LDFD Bridge Design Specifications3. Terminology3.1 For definitions of terms relating to plastics, see Termi-nology F412 and abbreviations are in accordance with Termi-nology D1600, unless otherwise specified.3.2 Definitions of Terms Specific
11、to This Standard:3.3 access opening, na hole in the top or crown of thewater quality unit for access to the interior for inspection,cleaning and removing of sediment, hydrocarbons, floatingdebris, and pollutants without personnel entry.3.4 bypass, nan optional external piping intended toconvey storm
12、 flow in excess of the treatment flow rate beyondthe water quality unit.3.5 Compartment, na separate and distinct section of thewater quality unit designated for specific contaminant removal.3.6 first flush, nthe first half inch to one inch of rainfallwhich results in overland flow during a storm ev
13、ent or asrequired by the regional water quality regulatory agency.3.7 flow diverter (partitions), na device at the inlet of thewater quality unit that extends partially between the top and1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct r
14、esponsibility of Subcommittee F17.26 on OlefinBased Pipe.Current edition approved Dec. 1, 2010. Published January 2011. Originallyapproved in 2010. Last previous edition approved in 2010 as F273710.DOI:10.1520/F273710A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact A
15、STM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825,Irving, TX 75062, http:/www.plasticpipe.org.4Available from America
16、n Association of State Highway and TransportationOfficials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,http:/www.transportation.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.invert intended to deflect infl
17、uent downward and increase thelength of the flow path of the liquid as it travels through thewater quality unit.3.8 joint, na physical separation where two sections of thewater quality unit are in contact.3.9 monolithic corrugated HDPE water quality unit, nasingle extruded piece of pipe with no inte
18、rnal joints and weldedend caps that serves as the water quality unit.3.10 non-sealed joint, na joint where a machined fit willminimize the movement of liquid from one side of a wall to theopposite side.3.11 orifice equation, nprediction of flow rate through around opening of liquid given the opening
19、 size and the headabove the opening.3.12 owner, nis by definition end user, customer, orpurchaser.3.13 sealed joint, na joint that is sealed to prevent liquidpassing from one side of a wall to the opposite wall.3.14 sectional corrugated HDPE water quality unit, nagroup of two or more extruded pieces
20、 of pipe connected withsealed joints that when combined serve as the principal unit.3.15 Stokes Law, nprediction of settling time for particlesof various sizes in a liquid.3.16 treatment flow rate, nthe flow rate for which thewater quality unit is intended to treat such to provide removalof Total Su
21、spended Solids (TSS).3.17 water quality unita single unit or series of units inwhich pollutants from storm runoff from land drainage isreceived, detained, and treated and from which the liquideffluent, which is comparatively free from settleable, sus-pended, and floating solids, is then discharged t
22、o a public stormsewer, water detention / retention structure, or publicly ownedwaterway.3.18 weir, na partition across the width of the sedimentchamber that partially extends between the invert and top andis intended to trap pollutants.4. Ordering Information4.1 The owner shall include the following
23、 information inbidding documents and on the purchase order, as applicable tothe units being ordered:4.1.1 Reference to this specification, and date of issue.4.1.2 Quantity or number of water quality units.4.1.3 Capacity of the tank in ft3or gal (L).4.1.4 Project conditions such as peak storm flow ra
24、te,bypass diameter and associated piping elevations.4.1.5 Acceptance will be based on a review of the calcula-tions or testing submittals.4.1.6 Design requirements such as depth of earth cover, liveload applied at the surface, ground water level and jointrequirements for bypass pipe.4.1.7 Testing fo
25、r water leakage shall not be required at thejob site unless specifically required by the owner at the time ofordering.5. Materials and Manufacture5.1 Water Quality Unit, Access Risers and FittingsShallbe fabricated from pipe and fittings meeting the requirementsof Specification F2306/F2306M. It is p
26、ermissible to utilizeother pipe materials as long as they meet the performancecriteria in this standard and are approved by the owner.5.2 Inlet and Outlet TeesShall be fabricated from pipe andfittings meeting the requirements of Specification F2306/F2306M for dual wall pipe or Specification F714 for
27、 solid wallpipe. It is permissible to utilize other pipe materials as long asthey meet the performance criteria in this standard and areapproved by the owner.5.3 Internal Tank PipingInternal piping within the waterquality unit shall be fabricated from pipe and fittings meetingthe requirements of Spe
28、cification F2306/F2306M for dual wallpipe or Specification F714 for solid wall pipe. It is permissibleto utilize other pipe materials as long as they meet theperformance criteria in this standard and are approved by theowner.5.4 Weirs, Flow Diverters, and End CapsWeirs, flowdiverters (partitions), a
29、nd end caps shall be fabricated fromeither flat plates meeting the requirements of PPI TR-4 PE3408 material.5.5 Pipe Connections:5.5.1 Pipe to Water Quality Unit connections shall employflexible watertight connectors conforming to the requirementsof Specification F477.HDPE water quality units contai
30、n three (3) chambers. A side inlet may be used in lieu of the end inlet and flow diverter when a full height longitudinal partition isconstructed in the sediment chamber compartment to extend the particle travel length and isolate incoming flow from sediment build-up.FIG. 1 Horizontally Laid Corruga
31、ted HDPE Water Quality UnitsF2737 10a26. Structural Design Requirements6.1 Pipe sections used in the fabrication of the water qualityunit shall be design by calculation using the AASHTO LRFDBridge Specifications, Section 12, “ Buried Structures andTunnel Liners”6.2 Structural analysis and design of
32、the water quality unitsshall be performed using commercially practicable methodsand may include computer aided analysis, field based analysis,or analytical calculations.6.2.1 Structural analysis and design shall include provisionsfor external hydrostatic pressure.6.2.2 Structural analysis and design
33、 shall incorporate aminimum live load at the surface, of an AASHTO H-25 load,unless greater loading is anticipated.6.2.3 Structural analysis and design shall take into consid-eration the number, placement, and size of all openings.6.3 Installation shall be in accordance with the manufactur-ers instr
34、uctions.7. Physical Dimensions7.1 Water Quality Unit Sizes:7.1.1 The volume of water quality units is given in Table 1.These volumes do not reflect the treatment or removal efficien-cies in 9.2.7.2 Compartments:7.2.1 Units shall utilize multiple compartments with divid-ing weirs and flow diverters (
35、partitions) welded to the unit.Separate compartments shall exist for solids and floatableremoval.7.2.1.1 Welding of the weir and flow diverters (partitions)shall be done by continuous extrusion welding on both sides ofthe weir and flow diverters (partitions).7.2.1.2 Welding rod shall be of medium or
36、 high densitypolyethylene corresponding to the properties for the end platematerials in 5.4 with the exception that the tensile strength atyield shall not be less than 5000 psi (3.5MKg/m2).7.2.2 Multiple units installed in series or parallel are accept-able.7.2.3 Each compartment shall have an acces
37、s riser forinspection and maintenance.7.3 Inlet and Outlet Pipes:7.3.1 The inlet pipe shall be no less than 10 in. (250 mm)in diameter.7.3.2 The elevation difference between the invert of the inletpipe and the invert of the outlet pipe shall be a minimum of 2in. (50mm).7.3.3 Connections to inlet and
38、 outlet pipes shall be madewith a sealed flexible connector conforming to SpecificationF477.7.4 Bypass pipe:7.4.1 The bypass pipe shall be no less than 10 in. (250 mm)in diameter.7.4.2 The bypass pipe shall be located between the connec-tions of the inlet pipe and the outlet pipe of the water qualit
39、yunit to the main storm drain line.7.4.3 The bypass pipe shall be the same size as the mainstorm drain line.7.4.3.1 Pipe size shall be determined by the design engineerand furnished to the manufacturer for fabrication.7.5 Outlet Devices:7.5.1 If tees or outlet filters are added, they shall be made o
40、fnoncorrosive materials and be permanently connected withnon-corrosive fasteners to either the inside of the water qualityunit or the outlet pipe.7.5.2 Outlet filter devices, if specified, shall be installed inaccordance with manufacturers recommendations or require-ments of the regulating agencies,
41、 or both.7.5.3 Specifications for tees and outlet filters shall be inaccordance with treatment flow conditions.7.6 Access Openings:7.6.1 An access opening shall be provided for inspectionand maintenance of all compartments.7.6.2 Access openings shall be a minimum of 24 in.(600 mm) in diameter. The c
42、over shall be provided with alocking mechanism to prevent unauthorized entrance unlessotherwise specified by the owner.7.6.3 An access opening shall be provide for each compart-ment.7.7 End Plates:7.7.1 Plates shall be welded to the ends of the pipe sectionsto form the completed water quality unit.7
43、.7.1.1 Welding of the end plates shall be done by continu-ous extrusion welding on both sides of the wall.7.7.1.2 Welding rod shall be of medium or high densitypolyethylene meeting the properties for the unit as requiredunder Specification F2306/F2306M with the exception that thetensile strength at
44、yield shall not be less than 5000 psi (3.5MKg /m2).7.7.2 End plates shall be made of virgin PE plastic com-pound meeting the requirements of cell classification 445434Cas defined in Specification D3350, except that carbon blackcontent shall not exceed 4%. Compounds that have a higherTABLE 1 Water Qu
45、ality Unit SizesUnit Inside Diameterin. (mm)Inside Lengthft (m)Total Volumegal (m3)Minimum Inlet/Outlet Diameterin. (mm)36 (900) 20 (6) 1058 (4.0) 10 (250)36 (900) 40 (12) 2116 (8.0) 10 (250)42 (1050) 20 (6) 1439 (5.4) 12 (300)42 (1050) 40 (12) 2879 (10.9) 12 (300)48 (1200) 20 (6) 1879 (7.1) 12 (300
46、)48 (1200) 40 (12) 3758 (14.2) 12 (300)60 (1500) 20 (6) 2937 (11.1) 15 (375)60 (1500) 40 (12) 5874 (22.2) 15 (375)F2737 10a3cell classification in one or more properties shall be permittedprovided all other product requirements are met.8. Quality Control and Sampling8.1 The manufacturer shall measur
47、e and document thephysical dimensions of each water quality unit as requiredunder Section 7.9. Performance Test Methods9.1 Watertight IntegrityLaboratory leakage testing (if re-quired) of the unit shall be performed using either the vacuumor hydrostatic test methods listed in 9.1.1 and 9.1.2. Thiste
48、sting is only to confirm the integrity of the welds andhomogeneous quality of the wall. Pressure testing of the jointsand any similar connections shall be in accordance with 9.2.9.1.1 Vacuum TestingSeal the empty unit and applyvacuum to 4 in. (100mm) of Mercury. Hold the vacuum for aperiod of 5 min
49、to allow for pressure equalization, andstabilization of product creep. If the vacuum drops it shall beincreased to 4 in. (100 mm) of Mercury and held for a periodof 2 min. The unit is approved if 90% of vacuum is held for the2 min period. If the unit fails, it shall be repaired and retested.9.1.2 Hydrostatic TestingSeal the empty unit and fill withwater to its operational level, monitor the leakage, if anyoccurs, overa1hperiod. The maximum allowable leakageshall not exceed 0.1% of the manufactures stated total volumewithin the 1 h period. If the unit f
