ASTM_D_1998_-_15.pdf

Designation:D199815Standard Specification forPolyethylene Upright Storage Tanks1This standard is issued under the fixed designation D1998;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.1.Scope*1.1 This specification covers flat-bottom,upright,cylindri-cal tanks molded in one-piece seamless construction by rota-tional molding.The tanks are molded from polyethylene forabove ground,vertical installation and are capable of contain-ing aggressive chemicals at atmospheric pressure.Included arerequirements for materials,properties,design,construction,dimensions,tolerances,workmanship and appearance.Tankcapacities are from 1900 L(500 gal)up.1.2 This specification covers the design of stationery vesselsfor use at atmospheric pressure intended for use with liquidsheated below their flash points and continuous service tem-peratures below 66C(150F)for Type I tanks and below 60C(140F)for Type II tanks.1.2.1 NFPA Standards 30 and NFPA 31 shall be consultedfor installations that are subject to the requirements of thesestandards.1.3 For service requirements beyond the scope of thisspecification(1.2),such as externally imposed mechanicalforces,internal pressure or vacuum,higher temperatureservice,etc.,other relevant sources of standards,for example,local and state building codes,NFPA,ASME,ARM,etc.,shallbe consulted.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.NOTE1ISO 13341:2005+A1:2011 and ISO 13575:2012 are similar,but not equivalent to this standard.1.5 The following precautionary caveat pertains only to thetest methods portion,Section 11,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.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1693 Test Method for Environmental Stress-Cracking ofEthylene PlasticsD2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplastic Pipe ProductsD3892 Practice for Packaging/Packing of PlasticsD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens,Plaques,or SheetsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF412 Terminology Relating to Plastic Piping Systems2.2 OSHA Standard:29 CFR 1910.106Occupational Safety and HealthAdministration,Flammable and Combustible Liquids32.3 ANSI Standard:B-16.5 Pipe Flanges and Flanged Fittings42.4 NFPA Standards:30 Flammable and Combustible Liquid Code531 Installation of Oil Burning Equipment52.5 ISO Standards:6ISO 13341:2005+A1:2011 Static Thermoplastic Tanks fortheAbove Ground Storage of Chemicals Blow Mouldedor Rotationally Moulded Polyethylene Tanks Require-ments and Test MethodsISO 13575:2012 Static Thermoplastic Tanks for AboveGround Storage of Domestic Heating Oils,Kerosene andDiesel Fuels Blow Moulded and Rotationally MouldedPolyethylene Tanks and Rotationally Moulded Tanks1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.19 on Film,Sheeting,and Molded Products(Section D20.15.01).Current edition approved Sept.15,2015.Published October 2015.Originallyapproved in 1991.Last previous edition approved in 2013 as D1998-13.DOI:10.1520/D1998-15.2For 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.3Available from Occupational Safety and Health Administration(OSHA),200Constitution Ave.,NW,Washington,DC 20210.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.5Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02269-9101.6Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*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 Made ofAnionically Polymerized Polyamide 6 Require-ments and Test Methods3.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nologies D883 and F412 and the Association of RotationalMolders(ARM)Glossary of Terms,7unless otherwise indi-cated.3.2 Definitions of Terms Specific to This Standard:3.2.1 bottom knuc