1、Designation: F2922 13 (Reapproved 2018)Standard Specification forPolyethylene (PE) Corrugated Wall Stormwater CollectionChambers1This standard is issued under the fixed designation F2922; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, 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 specification covers requirements, test methods,materials, and marking for polyethylene (PE), o
3、pen bottom,buried arch-shaped chambers of corrugated wall constructionused for collection, detention, and retention of stormwaterrunoff. Applications include commercial, residential,agricultural, and highway drainage, including installation un-der parking lots and roadways.1.2 Chambers are produced
4、in arch shapes with dimensionsbased on chamber rise, chamber span, and wall stiffness.Chambers are manufactured with integral feet that provide basesupport. Chambers may include perforations to enhance waterflow. Chambers must meet test requirements for arch stiffness,flattening, and accelerated wea
5、thering.1.3 Analysis and experience have shown that the successfulperformance of this product depends upon the type and depthof bedding and backfill, and care in installation. This specifi-cation includes requirements for the manufacturer to providechamber installation instructions to the purchaser.
6、1.4 The values stated in inch-pound units 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.1.5 The following safety hazards caveat pertains only to thetest method portion, Sect
7、ion 6, 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, health, andenvironmental practices and determine the applicability ofregulatory lim
8、itations prior to use.1.6 This international 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 Organizatio
9、n TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2412 Test Method for
10、 Determination of External LoadingCharacteristics of Plastic Pipe by Parallel-Plate LoadingD2990 Test Methods for Tensile, Compressive, and FlexuralCreep and Creep-Rupture of PlasticsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsD4329 Practice for Fluorescent Ultraviolet
11、(UV) Lamp Ap-paratus Exposure of PlasticsD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens, Plaques, or SheetsD6992 Test Method for Accelerated Tensile Creep andCreep-Rupture of Geosynthetic Materials Based on Time-Temperature Superposition Using the Stepped Isotherma
12、lMethodF412 Terminology Relating to Plastic Piping SystemsF2136 Test Method for Notched, Constant Ligament-Stress(NCLS) Test to Determine Slow-Crack-Growth Resis-tance of HDPE Resins or HDPE Corrugated PipeF2787 Practice for Structural Design of Thermoplastic Cor-rugated Wall Stormwater Collection C
13、hambers3. Terminology3.1 DefinitionsDefinitions used in this specification are inaccordance with the definitions in Terminology F412, andabbreviations are in accordance with Terminology D1600,unless otherwise indicated.3.2 Definitions of Terms Specific to This Standard:1This specification is under t
14、he jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.65 on LandDrainage.Current edition approved Feb. 15, 2018. Published March 2018. Originallyapproved in 2012. Last previous edition approved in 2013 as F2922-131. DOI:10.1520/F292213R18
15、.2For referenced ASTM standards, 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.*A Summary of Changes section appears at the end of this sta
16、ndardCopyright 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 principles on standardization established in the Decision on Principles for theDevelopment of
17、International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.1 chamberan arch-shaped structure manufactured ofthermoplastic with an open-bottom that is supported on feetand may be joined into rows that begin with, and are
18、 termi-nated by, end caps (see Fig. 1).3.2.2 chamber storage capacitythe bare chamber storagecapacity excluding storage in end caps, stone porosity, distri-bution piping or other distribution components.3.2.3 corrugated walla wall profile consisting of a regularpattern of alternating crests and vall
19、eys (see Fig. 2).3.2.4 crestthe element of a corrugation located at theexterior surface of the chamber wall, spanning between twoweb elements (see Fig. 2).3.2.5 crownthe center section of a chamber typicallylocated at the highest point as the chamber is traversedcircumferentially.3.2.6 end capa bulk
20、head provided to begin and terminatea chamber, or row of chambers, and prevent intrusion ofsurrounding embedment materials.3.2.7 foota flat, turned out section that is manufacturedwith the chamber to provide a bearing surface for transfer ofvertical loads to the bedding (see Fig. 1).3.2.8 inspection
21、 portan opening in the chamber wall thatallows access to the chamber interior.3.2.9 nominal heighta designation describing the approxi-mate vertical dimension of the chamber at its crown (see Fig.1).3.2.10 nominal widtha designation describing the ap-proximate outside horizontal dimension of the cha
22、mber at itsfeet (see Fig. 1).3.2.11 periodthe length of a single repetition of therepeated corrugation, defined as the distance from the center-line of a valley element to the centerline of the next valleyelement (see Fig. 2).3.2.12 risethe vertical distance from the chamber base(bottom of the chamb
23、er foot) to the inside of a chamber wallvalley element at the crown as depicted in Fig. 1.3.2.13 spanthe horizontal distance from the interior ofone sidewall valley element to the interior of the other sidewallvalley element as depicted in Fig. 1.3.2.14 valleythe element of a corrugated wall located
24、 atthe interior surface of the chamber wall, spanning between twowebs (see Fig. 2).3.2.15 webthe element of a corrugated wall that connectsa crest element to a valley element (see Fig. 2).4. Materials and Manufacture4.1 The chamber and end caps shall be made of virgin PEplastic compound meeting the
25、requirements of SpecificationD3350 cell classification 516500C or 516500E, except that thecarbon black content shall not exceed 3%. Compounds thathave a higher cell classification in one or more properties shallbe permitted provided all other product requirements are met.For slow crack growth resist
26、ance, acceptance of resins shall bedetermined by using the notched constant ligament-stress(NCLS) test on a finished compounded resin according to theprocedure described in 6.2.11. The chamber sample shall beground and a test plaque made in accordance with PracticeD4703 Procedure C at a cooling rate
27、 of 27F/min (15C/min)and tested per 6.2.11. The average failure time of test speci-mens from plaques shall not be less than 100 h.4.2 Rework MaterialIn lieu of virgin PE, clean reworkmaterial generated from the manufacturers own chambers maybe used, provided the material meets the cell class require
28、-ments of 4.1.5. Requirements5.1 Chamber Description:5.1.1 Chambers shall be produced in arch shapes symmetricabout the crown with corrugated wall and integral or attachedfeet for base support (see Fig. 1). Any arch shape is acceptableprovided all the requirements of this specification are met.NOTE
29、1For purposes of structural optimization, the wall geometry(for example, corrugation height, crest width, valley width, and web pitch)The model chamber shown in this standard is intended only as a general illustration. Any arch-shape chamber configuration is permitted, as long as it meets all thespe
30、cified requirements of this standard.FIG. 1 Model ChamberF2922 13 (2018)2may vary around the chamber circumference.5.1.2 Chambers shall be produced with maximum span atthe base of the chamber (bottom of the chamber foot).5.1.3 Chambers may include access ports for inspection orcleanout. Chambers wit
31、h access ports shall meet the require-ments of this standard with access ports open and closed.5.1.4 Chambers may include provisions for hydraulic con-nections at various locations around the chamber. Chamberswith hydraulic connections through the chamber shall meet therequirements of this standard
32、with hydraulic connections (1)closed and (2) with the hydraulic connection fitting installed.5.1.5 Chambers may include perforations. Perforations shallbe cleanly fabricated in a size, shape, and pattern determinedby the manufacturer. Chambers with perforations shall meetthe requirements of this sta
33、ndard.5.1.6 Chambers may include integral, repeating end walls.Chambers with integral repeating end walls shall meet therequirements of this standard at all locations along the chamberlength. The chamber shall be capable of carrying the full loadfor which it was designed at all locations along the c
34、hamberlength.5.1.7 Chamber sections shall be manufactured to connect atthe ends to provide rows of various lengths. Joints shall beconfigured to prevent intrusion of the surrounding embedmentmaterial and shall be capable of carrying the full load for whichthe chamber is designed.5.1.8 Each row of ch
35、ambers shall begin and terminate withan end cap. End caps may be an integral part of the chamber ora separate component. End caps that are injection molded shallmeet the requirements of this standard.5.1.9 Chamber classifications, dimensions, and tolerancesare provided in Table 1. Chamber classifica
36、tions are based onthe nominal height and nominal width of the chambers, asillustrated in Fig. 1. Classifications shall be manufactured withthe specified rise and span with tolerances, minimum footwidth, and wall thickness requirements.NOTE 2The values for arch stiffness in Table 1 should not beconsi
37、dered comparable to values of pipe stiffness.5.2 WorkmanshipThe chambers shall be homogeneousthroughout and essentially uniform in color, opacity, density,and other properties. The interior and exterior surfaces shall befree of chalking, sticky, or tacky material. The chamber wallsshall be free of c
38、racks, blisters, voids, foreign inclusions, orother defects that are visible to the naked eye and may affectthe wall integrity.5.3 Physical and Mechanical Properties of Finished Cham-ber:5.3.1 Wall ThicknessChambers shall have minimum andaverage wall thicknesses not less than the wall thicknessessho
39、wn in Table 1 when measured in accordance with 6.2.1.5.3.2 Minimum Foot WidthChambers shall have a footwidth not less than the minimum foot width as shown in Table1 when measured in accordance with 6.2.2 (see also Fig. 1).5.3.3 Rise and Span DimensionsChambers shall meetthe rise and span dimension r
40、equirements shown in Table 1when measured in accordance with Sections 6.2.3 and 6.2.4(see also Fig. 1).5.3.4 Deviation From StraightnessThe chamber and itssupport feet shall not have a deviation from straightness greaterthan L/100, where L is the length of an individual chamber,when measured in acco
41、rdance with 6.2.5.NOTE 3This check is to be made at the time of manufacture and isincluded to prevent pre-installation deformations in a chamber that meetsThe corrugation profile shown in this standard is intended only as a general illustration. Any corrugation pattern is permitted, as long as it me
42、ets all the specified testrequirements of this standard.FIG. 2 Model Corrugated WallTABLE 1 Chamber Classifications, Dimensions, and TolerancesChamberClassificationNominalHeightNominalWidthRise SpanMinimumFootWidthWallThicknessMinimumArchStiffnessConstantAverage ToleranceAverage ToleranceAverage Min
43、imumin.(mm)in.(mm)in.(mm)in.(mm)in.(mm)in.(mm)in.(mm)in.(mm)in.(mm)lb/ft/%1633 16(406)33(838)13.5(343)1.0(25)25.0(635)1.0(25)4.0(100)0.130(3.3)0.120(3.0)3003051 30(762)51(1295)27.0(686)1.0(25)44.0(1118)1.1(28)4.0(100)0.180(4.6)0.165(4.2)300F2922 13 (2018)3all other requirements of this standard.5.3.
44、5 Storage CapacityManufacturers shall provide thestorage capacity of the bare chamber and end cap and a stagestorage table for the chamber and end cap. Reported valuesshall be based on components “as-assembled” to eliminatedouble counting storage at joints and end caps. Volumedetermination shall be
45、in accordance with 6.2.6.5.3.6 Creep Rupture StrengthSpecimens fabricated in thesame manner and composed of the same materials including alladditives, as the finished chambers shall have a 50 year creeprupture tensile strength at 73 F (23C) not less than 700 psi(4.8 MPa) when determined in accordanc
46、e with 6.2.7.5.3.7 Creep ModulusSpecimens fabricated in the samemanner and composed of the same materials including alladditives, as the finished chambers shall have a 50 year tensilecreep modulus at 73 F (23C) of not less than 20,000 psi (138MPa) when tested at a stress level of 500 psi (3.5 MPa) o
47、r thedesign service stress, whichever is greater. The creep modulusshall be determined in accordance with 6.2.8. The actual testderived creep modulus shall be used in the design of thechamber.NOTE 4The specified minimum modulus provides assurance oflong-term stiffness for a chamber resin. It does no
48、t provide assurance thatall chambers manufactured with a resin of this stiffness will be adequatefor all long-term load conditions. Structural calculations to demonstrateadequacy are still required in accordance with 5.5 and 5.6.2.NOTE 5The 50 year creep rupture strength and 50 year creep modulusval
49、ues, determined by the test methods in 6.2.7 and 6.2.8, are used todefine the slope of the logarithmic regression curves to describe therequired material properties sampled from the product. They are not to beinterpreted as service life limits.5.3.8 Arch Stiffness ConstantChambers shall have an archstiffness constant (ASC) not less than the minimum archstiffness constant shown in Table 1 when determined inaccordance with 6.2.9.5.3.9 FlatteningChambers shall show neither splitting,cracking, or breaking under normal light and the unaided e
