1、Designation: F2418 16Standard Specification forPolypropylene (PP) Corrugated Wall Stormwater CollectionChambers1This standard is issued under the fixed designation F2418; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、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 polypropylene (PP), open bottom,burie
3、d chambers of corrugated wall construction used forcollection, detention, and retention of stormwater runoff. Ap-plications include commercial, residential, agricultural, andhighway drainage, including installation under parking lots androadways.1.2 Chambers are produced in arch shapes with dimensio
4、nsbased 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 weathering.1.3 Analysis and exp
5、erience 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.1.4 The values stated in inc
6、h-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 This standard does not purport to address water qualityissues or hydraulic performance requirements associate
7、d withits use. It is the responsibility of the user to ensure thatappropriate engineering analysis is performed to evaluate thewater quality issues and hydraulic performance requirementsfor each installation.1.6 The following safety hazards caveat pertains only to thetest method portion, Section 6,
8、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 healthpractices and determine the applicability of regulatory limita-tions prior to use
9、.2. Referenced Documents2.1 ASTM Standards:2D256 Test Methods for Determining the Izod PendulumImpact Resistance of PlasticsD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Pl
10、astics and Electrical Insulating Materi-alsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2412 Test Method for Determination of External LoadingCharacteristics of Plastic Pipe by Parallel-Plate LoadingD2990
11、 Test Methods for Tensile, Compressive, and FlexuralCreep and Creep-Rupture of PlasticsD4101 Specification for Polypropylene Injection and Extru-sion MaterialsD4329 Practice for Fluorescent Ultraviolet (UV) Lamp Ap-paratus Exposure of PlasticsD6992 Test Method for Accelerated Tensile Creep andCreep-
12、Rupture of Geosynthetic Materials Based on Time-Temperature Superposition Using the Stepped IsothermalMethodF412 Terminology Relating to Plastic Piping SystemsF2787 Practice for Structural Design of Thermoplastic Cor-rugated Wall Stormwater Collection Chambers1This specification is under the jurisdi
13、ction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.65 on LandDrainage.Current edition approved April 1, 2016. Published June 2016. Originallyapproved in 2004. Last previous edition approved in 2013 as F2418-13. DOI:10.1520/F2418-16.2For referenc
14、ed 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 standardCopyright
15、 ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Definitions:3.1.1 Definitions used in this specification are in accordancewith the definitions in Terminology F412, and abbreviationsare in accordance with Terminology D1600, un
16、less otherwiseindicated.3.1.2 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 termi-nated by, end caps (see Fig. 1).3.1.3 corrugated walla wall profile consisting of a regularpattern of alt
17、ernating crests and valleys (see Fig. 2).3.1.4 crestthe element of a corrugation located at theexterior surface of the chamber wall, spanning between twoweb elements (see Fig. 2).3.1.5 crownthe center section of a chamber typicallylocated at the highest point as the chamber is traversedcircumferenti
18、ally.3.1.6 end capa bulkhead provided to begin and terminatea chamber, or row of chambers, and prevent intrusion ofsurrounding embedment materials.3.1.7 foota flat, turned out section that is manufacturedwith the chamber to provide a bearing surface for transfer ofvertical loads to the bedding (see
19、Fig. 1).3.1.8 inspection portan opening in the chamber wall thatallows access to the chamber interior.3.1.9 nominal heighta designation describing the approxi-mate vertical dimension of the chamber at its crown (see Fig.1).3.1.10 nominal widtha designation describing the ap-proximate outside horizon
20、tal dimension of the chamber at itsfeet (see Fig. 1).3.1.11 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).3.1.12 risethe vertical distance from the chamber
21、base(bottom of the chamber foot) to the inside of a chamber wallvalley element at the crown as depicted in Fig. 1.3.1.13 spanthe horizontal distance from the interior ofone sidewall valley element to the interior of the other sidewallvalley element as depicted in Fig. 1.3.1.14 valleythe element of a
22、 corrugated wall located atthe interior surface of the chamber wall, spanning between twowebs (see Fig. 2).3.1.15 webthe element of a corrugated wall that connectsa crest element to a valley element (see Fig. 2).4. Materials and Manufacture4.1 This specification covers chambers made from virginand r
23、ework PP plastic materials as defined by material me-chanical requirements and chamber performance requirements.4.2 Polypropylene materials may be combined withcopolymers, pigments, and impact modifiers which togetherare suitable for manufacture. Manufactured chamber and endcap material shall meet o
24、r exceed the requirements of desig-nation PP0330B99945, Specification D4101. The minimumamount of polypropylene plastic in the material shall be 95 %by weight. The minimum tensile stress at yield, Test MethodD638, shall not be less than 3 100 psi (21 MPa). The minimumflexural modulus (1 % secant), T
25、est Method D790, ProcedureA, shall not be less than 145 000 psi (1 000 MPa). Theminimum Izod Impact Resistance at 73 F (23 C), Method Ain Test Method D256, shall not be less than 4 ft-lb/in. (215J/m). Materials shall meet the creep requirements in 5.3.5 and5.3.6 of this standard.NOTE 1The polypropyl
26、ene melt flow rate is specified for chambermanufacture by injection molding. The melt flow rate may be less than 10if the manufactured chamber meets all other requirements in this standard.This cell class will be re-evaluated when new chamber classifications areadded to Table 1.NOTE 2Polypropylene p
27、lastic is prepared by the polymerization ofpropylene or propylene with other alpha olefins as described in Specifi-cation D4101.4.3 Rework MaterialClean rework material generatedfrom the manufacturers own chambers may be used by thesame manufacturer, using the same type and grade resin,provided that
28、 the chambers produced meet all the requirementsof this specification.5. Requirements5.1 Chamber Description5.1.1 Chambers shall be produced in arch shapes symmetricabout the crown with corrugated wall and integral feet for basesupport (see Fig. 1). Any arch shape is acceptable provided allthe requi
29、rements of this specification are met.NOTE 3For purposes of structural optimization, the wall geometry(for example, corrugation height, crest width, valley width, and web pitch)may vary around the chamber circumference.5.1.2 Chambers shall be produced with maximum span atthe base of the chamber (bot
30、tom of the chamber foot).5.1.3 Chambers may include access ports for inspection orcleanout. Chambers with access ports shall meet the require-ments of this standard with access ports open and closed.NOTE 1The model chamber shown in this standard is intended only asa general illustration. Any chamber
31、 configuration is permitted, as long asit meets all the specified requirements of this standard.FIG. 1 Model ChamberF2418 1625.1.4 Chambers may include perforations. Perforations shallbe cleanly fabricated in a size, shape, and pattern determinedby the manufacturer. Chambers with perforations shall
32、meetthe requirements of this standard.5.1.5 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 desi
33、gned.5.1.6 Each row of chambers shall begin and terminate withan end cap.5.1.7 Chamber classifications, dimensions, and tolerancesare provided in Table 1. Chamber classifications are based onthe nominal height and nominal width of the chambers, asillustrated in Fig. 1. Classifications shall be manuf
34、actured withthe specified rise and span with tolerances, minimum footwidth, and minimum wall thickness.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, stic
35、ky, or tacky material. The chamber wallsshall be free of cracks, 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 andaver
36、age wall thicknesses not less than the minimum wallthicknesses shown in Table 1 when measured in accordancewith 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 an
37、d Span DimensionsChambers shall meet therise and span dimension requirements shown in Table 1 whenmeasured in accordance with 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
38、the length of an individual chamber,when measured in accordance with 6.2.5.NOTE 4This check is to be made at the time of manufacture and isincluded to prevent pre-installation deformations in a chamber that meetsall other requirements of this standard.5.3.5 Creep Rupture StrengthSpecimens fabricated
39、 in thesame manner and composed of the same materials, includingall additives, as the finished chambers shall have a 50 yearcreep rupture tensile strength at 73 F (23 C) not less than 700psi (4.8 MPa), when determined in accordance with 6.2.6.5.3.6 Creep ModulusSpecimens fabricated in the samemanner
40、 and composed of the same materials, including alladditives, as the finished chambers shall have a 50 year tensilecreep modulus at 73 F (23 C) not less than 24 000 psi (165MPa) when tested at a stress level of 500 psi (3.5 MPa) ordesign service stress, whichever is greater. The creep modulusshall be
41、 determined in accordance with 6.2.7. The actual testderived creep modulus shall be used in the design of thechamber (Note 5).NOTE 5The specified minimum modulus provides assurance oflong-term stiffness for a chamber resin. It does not provide assurance thatall chambers manufactured with a resin of
42、this stiffness with be adequateNOTE 1The corrugation profile shown in this standard is intended only as a general illustration. Any corrugation pattern is permitted, as long as itmeets all the specified test requirements of this standard.FIG. 2 Model Corrugated WallTABLE 1 Classifications, Dimension
43、s, and TolerancesChamberClassificationNominalHeightNominalWidthRise SpanMinimumFoot WidthWallThicknessMinimumArchStiffnessConstantAAverage Minimumin. (mm) in. (mm)Averagein. (mm)Tolerance in (mm)Averagein. (mm)Tolerance in (mm) in. (mm) in. (mm) in. (mm) lb/ft/%1225 12 (305) 25 (635) 9.8 (249) 0.4 (
44、10) 15.3 (389) 0.4 (10) 4.0 (100) 0.150 (3.8) 0.140 (3.5) 3001633 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) 3004576 45 (1143) 76 (1930) 40.5 (1029)
45、1.0 (25) 64.0 (1626) 1.6 (41) 5.0 (127) 0.225 (5.7) 0.205 (5.2) 25060 101 60 (1524) 101 (2565) 54.0 (1372) 1.4 (34) 84.5 (2146) 2.1 (54) 8.0 (203) 0.245 (6.2) 0.225 (5.7) 250AThe values for arch stiffness should not be considered comparable to values of pipe stiffness.F2418 163for all long-term load
46、 conditions. Structural calculations to demonstrateadequacy are still required in accordance with 5.5 and 5.6.2.NOTE 6The 50 year creep rupture strength and 50 year creep modulusvalues, determined by the test methods in 6.2.6 and 6.2.7, are used todefine the slope of the logarithmic regression curve
47、s to describe therequired material properties sampled from the product. They are not to beinterpreted as service life limits.5.3.7 Arch Stiffness ConstantChambers shall have an archstiffness constant (ASC) not less than the minimum archstiffness constant shown in Table 1 when determined inaccordance
48、 with 6.2.8.5.3.8 FlatteningChambers shall show neither splitting,cracking, or breaking under normal light and the unaided eyenor loss of load carrying capacity when tested in accordancewith 6.2.9.5.4 Accelerated WeatheringSpecimens fabricated in thesame manner and composed of the same materials as
49、thefinished chambers shall meet all material requirements in 4.2after accelerated weathering described in 6.3.5.5 Design and Installation RequirementsChambers shallbe structurally designed in accordance with Practice F2787.The chamber manufacturer shall provide the purchaser with therequirements for the proper installation of chambers and theminimum and maximum allowable cover height for specifictraffic and non-traffic loading conditions that meet the require-ments of Practice F2787.5.6 Design Data5.6.1 Hydraulic DataThe manufacturer
