1、Designation:D3753051Designation: D3753 12An American National StandardStandard Specification forGlass-Fiber-Reinforced Polyester Manholes and Wetwells1This standard is issued under the fixed designation D3753; the number immediately following the designation indicates the year oforiginal adoption or
2、, in the case 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.1NOTESection 6.9 was editorially corrected in June 2007.1. Scope*1.1 This specification cov
3、ers glass fiber-reinforced polyester manholes and wetwells for use primarily in sanitary and stormsewer applications.1.2 The values given in inch-pound units are to be regarded as the standard. The values in parentheses are provided forinformation purposes only.1.3 The following precautionary caveat
4、 pertains only to the test methods portion, Section 8, of this specification: This standarddoes not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practices and determine
5、the applicability of regulatory limitations prior to use.NOTE1There is no similar or equivalent ISO standard. 1There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2C581 Practice for Determining Chemical Resistance of Thermosetting Resins Used in Glass-Fiber-Re
6、inforced StructuresIntended for Liquid ServiceD695 Test Method for Compressive Properties of Rigid PlasticsD785 Test Method for Rockwell Hardness of Plastics and Electrical Insulating MaterialsD790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating
7、 MaterialsD883 Terminology Relating to PlasticsD1600 Terminology for Abbreviated Terms Relating to PlasticsD2412 Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel-Plate LoadingD2583 Test Method for Indentation Hardness of Rigid Plastics by Means of a Barco
8、l ImpressorD2584 Test Method for Ignition Loss of Cured Reinforced ResinsD3892 Practice for Packaging/Packing of Plastics3. Terminology3.1 GeneralDefinitions are in accordance with Terminology D883 and the abbreviations are in accordance with TerminologyD1600 unless otherwise indicated.3.2 bench and
9、 invert, ninternal flow channel with a sloped bench extending from the edge of the flow channel to the manholewall designed to facilitate the flow of liquid through the manhole between the pipe connectors.3.3 bottom, na flat, domed, dished, or other shaped bottom designed to make the manhole or wetw
10、ell watertight at its base.3.4 expanded base manhole, na manhole with the addition of eccentric or concentric reducers attached to cylinder sectionsof different diameter than the manhole to allow changes in cylinder diameter.3.5 manway reducer, nthe top portion of the manhole through which entrance
11、to the manhole is made and where the diameterincreases from the entrance way to the larger manhole cylinder.3.33.6 manhole, ncylinder with the manway reducer designed to handle a manhole cover and ring.1This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct
12、responsibility of Subcommittee D20.23 on Reinforced Plastic PipingSystems and Chemical Equipment.Current edition approved July 1, 2005. Published July 2005. Originally approved in 1979. Last previous edition approved in 1999 as D375399. DOI:10.1520/D3753-05E01.Current edition approved March 15, 2012
13、. Published April 2012. Originally approved in 1979. Last previous edition approved in 2005 as D3753 051. DOI:10.1520/D3753-05E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume informa
14、tion, refer to the standards Document Summary page on the ASTM website.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately dep
15、ict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM Internati
16、onal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.4a constant diameter cylinder attached to a manway reducer designed to handle a manhole cover and ring.3.7 manhole cover and ring, nthose accessories used with the manhole to close the manway entrance (includ
17、es adjustmentrings).3.5manhole/wetwell3.8 manhole cylinder, nthe portion below the manway reducer that extends in a large diameter to the manhole base. Mayinclude eccentric or concentric reducers to allow changes in cylinder diameter.3.6the portion below the manway reducer that extends in a constant
18、 diameter to the manhole base.3.9 pipe connectors, nconnectors that provide access for the sewer pipe into the manhole.3.73.10 resin rich, adjdescribes that portion of the glass fiber-reinforced polyester material where the resin-to-glass ratio issignificantly greater than in other portions of the m
19、anhole.3.83.11 wetwell, nmanhole cylinder with an open, domed, flat, or other top not designed to support a manhole cover and ring.a cylinder without a manway reducer, which may be open at the top or may include a flat top.4. Materials4.1 ResinThe resins used shall be a commercial grade unsaturated
20、polyester resin.4.2 Reinforcing MaterialsThe reinforcing materials shall be commercial grade of E-type glass fibers in the form of mat,continuous roving, chopped roving, or roving fabric, having a coupling agent that will provide a suitable bond between the glassreinforcement and the resin.4.3 Surfa
21、cing MaterialIf reinforcing material is used on the surface exposed to the contained substance, it shall be acommercial grade chemical-resistant glass or organic surfacing mat having a coupling agent that will provide a suitable bond withthe resin.4.4 Fillers and AdditivesFillers, when used, shall b
22、e inert to the environment and manhole construction. Additives, such asthixotropic agents, catalysts, promoters, pigments, etc., may be added as required by the specific manufacturing process to be usedto meet the requirements of this standard. The resulting reinforced-plastic material shall meet th
23、e requirement of this specification.4.5 OtherPolyester continuous roving, polyester scrim, glass scrim, or other material, may be used. The resultingreinforced-plastic material shall meet the requirement of this specification.4.6 RibsWhen used, ribs may be manufactured as a solid construction or wit
24、h materials applied over a structural ornon-structural form. The resulting reinforced-plastic material shall meet the requirement of this specification.5. Manufacture5.1Manhole and wetwell cylinders, manway 5.1 Manhole, wetwells, manway reducers, eccentric or concentric reducers,connectors, and conn
25、ectorsbottoms shall be produced from glass fiber-reinforced polyester resin with construction determined bythe particular process of manufacture and configuration. The process may include contact molding, compression molding,pultrusion, filament winding, resin transfer molding, spray up, hand lay-up
26、, centrifugal casting, vacuum bagging, or other methods.Ribs may be attached to the interior or the exterior surface.5.2 Interior AccessAll manholes or wetwells shall be designed so that a ladder or step system can be supported by theinstalled manhole or wetwell.5.3 Manway ReducerManway reducers may
27、 be eccentric or concentric with respect to the larger portion of the manhole.5.4 Cover and Ring SupportThe manholeManholes shall provide an area from which a typical ring and cover plate can besupported without damage to the manhole.5.5 Assembly JointsProduct segments may be joined together to form
28、 a complete manhole or wetwell.5.6 Manhole or Wetwell BottomShall be designed to be water tight and withstand the external hydraulic pressure of water tograde. The bottom design may include methods to anchor the bottom to a concrete base or other external structure to provide therequired resistance
29、to external pressure.5.7 Bench and InvertMay be produced from glass fiber-reinforced polyester resin or other material suitable for the contentsof the manhole. The bench and invert may include one or more12-in. diameter holes to allow the equalization of pressure betweenthe manhole interior and the
30、area under the bench and invert.6. Requirements6.1 Workmanship:6.1.1 Exterior SurfaceThe exterior surface shall be relatively smooth with no sharp projections. Hand-work finish isacceptable if enough resin is present to saturate all fibers. The exterior surface shall be free of blisters larger than
31、0.5 in. (12.7 mm)in diameter and delamination. Fibers loosely attached (can be removed with wire brush) are allowed if not excessive.6.1.2 Exterior Paint or other coatings PigmentationPaint, coatings, or high levels of pigmentation that impair the visualinspection of the laminate for excessive amoun
32、ts of captured air, blisters, or other defects are not allowed.6.1.3 IndentationsIndentations or other shape imperfections that will not affect performance are allowed.6.1.26.1.4 Interior SurfaceThe interior surface shall be resin rich with no exposed fibers. The surface shall be free of crazing,D37
33、53 122delamination, blisters larger than 0.5 in. (12.7 mm) in diameter, and wrinkles of 0.125 in. (3.2 mm) or greater in depth. Surfacepits shall be permitted up to 6/ft2(60/m2) if they are less than 0.75 in. (19 mm) in diameter and less than 0.0625 in. (1.6 mm) deep.Voids that cannot be broken with
34、 finger pressure and that are entirely below the resin surface shall be permitted up to 4/ft2(40/m2)if they are less than 0.5 in. (12.7 mm) in diameter and less than 0.0625 in. (1.6 mm) thick. Paint or other coatings are not allowed.Indentations or other shape imperfections that will not affect perf
35、ormance are allowed. ) if they are less than 0.5 in. (12.7 mm) indiameter and less than 0.0625 in. (1.6 mm) thick.6.1.5 Interior Paint or PigmentationPaint, coatings, or high levels of pigmentation that impair the visual inspection of thelaminate for excessive amounts of captured air, blisters, or o
36、ther defects are not allowed.6.2 RepairsAny manhole or wetwell may be repaired to meet all requirements of this specification.6.3 DimensionsThe dimensions shall be as shown below when measured in accordance with 8.3.1.6.3.1Minimum6.3.1 Minimum cylinder internal diameter of the manhole or wetwell sha
37、ll be 42 in. (1057 mm). The minimumreducer inside diameter shall be 21 in. (533 mm).6.3.2Manhole6.3.2 Manhole or wetwell lengths shall be in 6-in. (152-mm) increments 62 in. (51 mm).6.3.3 Nominal inside diameters shall be 42 in. (1067 mm), 48 in. (1219 mm), 54 in. (1372 mm), 60 in. (1524 mm), 66 in.
38、 (1676mm) and 72 in. (1829 mm). Tolerance on the inside diameter shall be 61 %. Other diameters as agreed upon between the purchaserand the manufacturer are covered by this specification.6.4 Manhole Performance TestOne complete manhole manufactured in a manner consistent in every way with thisspecif
39、ication shall meet the performance criteria in 6.4.1-6.4.3. If a change in materials or methods of manufacturing is made andthat change may affect the results of these tests, then the testing shall repeated. These tests are to be conducted on a representativemanhole to qualify the finished product c
40、haracteristics. They are not considered to be a quality control procedure and are notrequired for production parts.6.4.1 Load RatingThe complete manhole shall have a minimum dynamic-load rating of 16 000 lbf (71 172 N) when testedin accordance with 8.4. To establish this rating, the complete manhole
41、 shall not leak, crack, or suffer other damage when load testedto 40 000 lbf (177 929 N) and shall not deflect vertically downward more than 0.25 in. (6.35 mm) at the point of load applicationwhen loaded to 24 000 lb (106 757 N).6.4.2 StiffnessThe manhole cylinder shall have the minimum pipe-stiffne
42、ss values shown in Table 1 when tested in accordancewith 8.5. Stiffness requirements for other manhole lengths may be interpolated between the values in Table 1.6.4.3 SoundnessThe manholes shall not leak when tested in accordance with 8.6.6.56.5 Wetwell StiffnessThe wetwell cylinder shall have the m
43、inimum pipe-stiffness values shown in Table 1 when tested inaccordance with 8.5. Stiffness requirements for other wetwell lengths may be interpolated between the values in Table 1. Thesetests are to be conducted on a representative wetwell to qualify the finished product characteristics. They are no
44、t considered to bea quality control procedure and are not required for production parts.6.6 Chemical ResistanceManhole or wetwell samples manufactured in a manner consistent in every way with thisspecification shall be tested in accordance with 8.7. The log of percent retention of each property afte
45、r immersion testing whenplotted against the log of immersion time, and extrapolated to 100 000 h shall assure retention of at least 50 % of initial properties.If a change is made in the manhole construction and that change may affect the results of the chemical resistance testing, then thetesting sh
46、all be repeated. Chemical testing is conducted to determine the applicability of the materials used in the manufacture ofthe manhole to the specified use conditions. It is not considered to be a quality control procedure.6.66.7 Material PropertiesThe following properties shall be established for eac
47、h type of construction used in the manhole orwetwell. If a change in materials or methods of manufacturing is made and that change may effectaffect the results of the followingtests, then the testing shall be repeated. Material properties tests are conducted to qualify the finished product character
48、istics. Theyare not considered to be a quality control procedure and are not required for production parts.6.6.16.7.1 Material CompositionThe material composition of the manhole or wetwell in percent by weight shall bedetermined in accordance with 8.8.1.6.6.26.7.2 Compressive StrengthThe compressive
49、 strength in the hoop and axial directions of the manhole or wetwell shall bedetermined in accordance with 8.8.2.6.6.3TABLE 1 Stiffness RequirementsManhole or Wetwell Length, ft(mm)F/DY, psi (kPa)6 (1829) 0.72 (4.96)12 (3658) 1.26 (8.69)20 (6096) 2.01 (13.86)25 (7620) 3.02 (20.82)35 (10668) 5.24 (36.13)D3753 1236.7.3 Flexural Strength and ModulusThe flexural strength and flexural modulus of elasticity, in the hoop and axial directionsof the manhole, shall be determined in accordance with 8.8.3.6.7. Where part geometry will adver
