ASTM_D_3753_-_12e1.pdf

Designation:D3753121An 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,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.1NOTEEditorial corrections added in April 2013.1.Scope*1.1 This specification covers glass fiber-reinforced polyestermanholes and wetwells for use primarily in sanitary and stormsewer applications.1.2 The values given in inch-pound units are to be regardedas the standard.The values in parentheses are provided forinformation purposes only.1.3 The following precautionary caveat pertains only to thetest methods portion,Section 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.NOTE1There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2C581 Practice for Determining Chemical Resistance ofThermosetting Resins Used in Glass-Fiber-ReinforcedStructures Intended for Liquid ServiceD695 Test Method for Compressive Properties of RigidPlasticsD785 Test Method for Rockwell Hardness of Plastics andElectrical Insulating MaterialsD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD883 Terminology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2412 Test Method for Determination of External LoadingCharacteristics of Plastic Pipe by Parallel-Plate LoadingD2583 Test Method for Indentation Hardness of Rigid Plas-tics by Means of a Barcol ImpressorD2584 Test Method for Ignition Loss of Cured ReinforcedResinsD3892 Practice for Packaging/Packing of Plastics3.Terminology3.1 GeneralDefinitions are in accordance with Terminol-ogy D883 and the abbreviations are in accordance withTerminology D1600 unless otherwise indicated.3.2 bench and invert,ninternal flow channel with a slopedbench extending from the edge of the flow channel to themanhole wall designed to facilitate the flow of liquid throughthe manhole between the pipe connectors.3.3 bottom,na flat,domed,dished,or other shaped bottomdesigned to make the manhole or wetwell watertight at its base.3.4 expanded base manhole,na manhole with the additionof eccentric or concentric reducers attached to cylinder sectionsof different diameter than the manhole to allow changes incylinder diameter.3.5 manway reducer,nthe top portion of the manholethrough which entrance to the manhole is made and where thediameter increases from the entrance way to the larger manholecylinder.3.6 manhole,na constant diameter cylinder attached to amanway reducer designed to handle a manhole cover and ring.3.7 manhole cover and ring,nthose accessories used withthe manhole to close the manway entrance(includes adjust-ment rings).3.8 manhole cylinder,nthe portion below the manwayreducer that extends in a constant diameter to the manholebase.3.9 pipe connectors,nconnectors that provide access forthe sewer pipe into the manhole.3.10 resin rich,adjdescribes that portion of the glassfiber-reinforced polyester material where the resin-to-glassratio is significantly greater than in other portions of themanhole.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.23 on ReinforcedPlastic Piping Systems and Chemical Equipment.Current edition approved March 15,2012.Published April 2012.Originallyapproved in 1979.Last previous edition approved in 2005 as D3753 051.DOI:10.1520/D3753-12E01.2For 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 standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.11 wetwell,na 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 gradeunsaturated polyester resin.4.2 Reinforcing MaterialsThe reinforcing materials shallbe commercial grade of E-type glass fibers in the form of mat,continuous roving,chopped roving,or roving fabric,having acoupling agent that will provide a suitable bond between theglass reinforcement and the resin.4.3 Surfacing MaterialIf reinforcing material is used onthe surface exposed to the contained substance,it shall be acommercial grade chemical-resistant glas