ASTM D1998-21
(Specification)Standard Specification for Polyethylene Upright Storage Tanks
Standard Specification for Polyethylene Upright Storage Tanks
ABSTRACT
This specification covers flat-bottom, upright, cylindrical tanks molded in one-piece seamless construction by rotational molding. The tanks are molded from polyethylene for above ground, vertical installation and are capable of containing aggressive chemicals at atmospheric pressure. This specification does not cover the design of vessels intended for use at pressures other than atmospheric pressure. Furthermore, this specification does not cover the design of portable tanks and is not for vessels intended for use with liquids heated above their flash points in continuous service. Special design considerations not covered in this specification shall be given to vessels subject to superimposed mechanical forces, such as seismic forces, wind load or agitation; to vessels subject to service above specified temperature; and vessels subject to specified superimposed pressure of water. Low-temperature impact test shall be performed on rotational-molded polyethylene tanks. The test method is used on tanks molded from both the crosslinked and non-crosslinked polyethylenes. Dart drop impact test shall be performed to determine the quality of the tank. O-xylene-insoluble fraction or gel test shall be performed on crosslinked polyethylene. Visual inspection and water test shall also be performed on the samples.
SCOPE
1.1 This specification covers flat-bottom, upright, cylindrical tanks molded in one-piece seamless construction by rotational molding. The tanks are molded from polyethylene for above ground, vertical installation and are capable of containing aggressive chemicals at atmospheric pressure. Included are requirements for materials, properties, design, construction, dimensions, tolerances, workmanship and appearance. Tank capacities are from 1900 L (500 gal) up.
1.2 This specification covers the design of stationery vessels for use at atmospheric pressure intended for use with liquids heated below their flash points and continuous service temperatures below 66°C (150°F) for Type I tanks and below 60°C (140°F) for Type II tanks.
1.2.1 NFPA Standards 30 and NFPA 31 shall be consulted for installations that are subject to the requirements of these standards.
1.3 For service requirements beyond the scope of this specification (1.2), such as externally imposed mechanical forces, internal pressure or vacuum, higher temperature service, etc., other relevant sources of standards, for example, local and state building codes, NFPA, ASME, ARM, etc., shall be consulted.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Note 1: ISO 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 the test methods portion, Section 11, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D1998 −21
Standard Specification for
1
Polyethylene Upright Storage Tanks
This standard is issued under the fixed designation D1998; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This specification covers flat-bottom, upright, cylindri-
ization established in the Decision on Principles for the
cal tanks molded in one-piece seamless construction by rota-
Development of International Standards, Guides and Recom-
tional molding. The tanks are molded from polyethylene for
mendations issued by the World Trade Organization Technical
above ground, vertical installation and are capable of contain-
Barriers to Trade (TBT) Committee.
ingaggressivechemicalsatatmosphericpressure.Includedare
requirements for materials, properties, design, construction,
2. Referenced Documents
dimensions, tolerances, workmanship and appearance. Tank
2
2.1 ASTM Standards:
capacities are from 1900 L (500 gal) up.
D618Practice for Conditioning Plastics for Testing
1.2 Thisspecificationcoversthedesignofstationeryvessels
D883Terminology Relating to Plastics
for use at atmospheric pressure intended for use with liquids
D1693Test Method for Environmental Stress-Cracking of
heated below their flash points and continuous service tem-
Ethylene Plastics
peraturesbelow66°C(150°F)forTypeItanksandbelow60°C
D2837Test Method for Obtaining Hydrostatic Design Basis
(140°F) for Type II tanks.
forThermoplasticPipeMaterialsorPressureDesignBasis
1.2.1 NFPA Standards30 and NFPA 31 shall be consulted
for Thermoplastic Pipe Products
for installations that are subject to the requirements of these
D3892Practice for Packaging/Packing of Plastics
standards.
D4703Practice for Compression Molding Thermoplastic
Materials into Test Specimens, Plaques, or Sheets
1.3 For service requirements beyond the scope of this
E691Practice for Conducting an Interlaboratory Study to
specification (1.2), such as externally imposed mechanical
Determine the Precision of a Test Method
forces, internal pressure or vacuum, higher temperature
F412Terminology Relating to Plastic Piping Systems
service, etc., other relevant sources of standards, for example,
local and state building codes, NFPA,ASME,ARM, etc., shall 2.2 OSHA Standard:
29 CFR 1910.106 Occupational Safety and Health
be consulted.
3
Administration, Flammable and Combustible Liquids
1.4 The values stated in SI units are to be regarded as the
2.3 ANSI Standard:
standard. The values given in parentheses are for information
4
B-16.5Pipe Flanges and Flanged Fittings
only.
2.4 NFPA Standards:
5
NOTE 1—ISO 13341:2005+A1:2011 and ISO 13575:2012 are similar,
30Flammable and Combustible Liquid Code
but not equivalent to this standard. 5
31Installation of Oil Burning Equipment
6
1.5 The following precautionary caveat pertains only to the
2.5 ISO Standards:
test methods portion, Section 11, of this specification: This
ISO 13341:2005+A1:2011Static Thermoplastic Tanks for
standard does not purport to address all of the safety concerns,
theAboveGroundStorageofChemicals–BlowMoulded
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety, health, and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
environmental practices and determine the applicability of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
regulatory limitations prior to use.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from Occupational Safety and Health Administration (OSHA), 200
Constitution Ave., NW, Washington, DC 20210.
1 4
This specification is under the jurisdiction of ASTM Committee D20 on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
Plastics and is the direct responsibility of Subcommittee D20.19 on Film, Sheeting, 4th Floor, New York, NY 10036, http://www.ansi.org.
5
and Molded Products (Section D20.15.01). Available from National Fire Protection Association (NFPA), 1 Batterymarch
Current edition approved July 15, 2021. Published August 2021. Originally Park, Quincy, MA 02169-7471, http://www.nfpa.org.
6
approved in 1991. Last previous edition approved in 2015 as D1998-15. DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/D1998-21.
...
This 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. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D1998 − 15 D1998 − 21
Standard Specification for
1
Polyethylene Upright Storage Tanks
This standard is issued under the fixed designation D1998; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers flat-bottom, upright, cylindrical tanks molded in one-piece seamless construction by rotational
molding. The tanks are molded from polyethylene for above ground, vertical installation and are capable of containing aggressive
chemicals at atmospheric pressure. Included are requirements for materials, properties, design, construction, dimensions,
tolerances, workmanship and appearance. Tank capacities are from 1900 L (500 gal) up.
1.2 This specification covers the design of stationery vessels for use at atmospheric pressure intended for use with liquids heated
below their flash points and continuous service temperatures below 66°C (150°F) for Type I tanks and below 60°C (140°F) for
Type II tanks.
1.2.1 NFPA Standards 30 and NFPA 31 shall be consulted for installations that are subject to the requirements of these standards.
1.3 For service requirements beyond the scope of this specification (1.2), such as externally imposed mechanical forces, internal
pressure or vacuum, higher temperature service, etc., other relevant sources of standards, for example, local and state building
codes, NFPA, ASME, ARM, etc., shall be consulted.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
NOTE 1—ISO 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 the test methods portion, Section 11, of this specification: This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.19 on Film, Sheeting, and Molded
Products (Section D20.15.01).
Current edition approved Sept. 15, 2015July 15, 2021. Published October 2015August 2021. Originally approved in 1991. Last previous edition approved in 20132015
as D1998 - 13.D1998 - 15. DOI: 10.1520/D1998-15.10.1520/D1998-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D1998 − 21
D883 Terminology Relating to Plastics
D1693 Test Method for Environmental Stress-Cracking of Ethylene Plastics
D2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for
Thermoplastic Pipe Products
D3892 Practice for Packaging/Packing of Plastics
D4703 Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F412 Terminology Relating to Plastic Piping Systems
2.2 OSHA Standard:
3
29 CFR 1910.106 Occupational Safety and Health Administration, Flammable and Combustible Liquids
2.3 ANSI Standard:
4
B-16.5 Pipe Flanges and Flanged Fittings
2.4 NFPA Standards:
5
30 Flammable and Combustible Liquid Code
5
31 Installation of Oil Burning Equipment
6
2.5 ISO Standards:
ISO 13341:2005+A1:2011 Static Thermoplastic Tanks for the
...
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