ASTM D1998-04

Standard Specification for Polyethylene Upright Storage Tanks

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 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. It is also not for vessels intended for use with liquids heated above their flash points, or temperatures above 66C [150F] for Type I tanks and 60C [140F] for Type II tanks for continuous service. NFPA Standards 30 and 31 shall be consulted for installations that are subject to the requirements of these standards.
1.3 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 temperature in excess of 23C [73.4F]; and vessels subject to superimposed pressure exceeding 25.4 cm [10 in.] of water or 2.5 10 3  MPa [0.36 psi].
1.4 The values stated in SI units are to be regarded as the standard. The values given in brackets are for information only. There is no similar or equivalent ISO standard.
The following precautionary caveat pertains only to the test methods portion, Section , 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2004
• ICS: 23.020.10 - Stationary containers and tanks
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D1998-97 - Standard Specification for Polyethylene Upright Storage Tanks
• Effective Date: 01-Nov-2004
• Replaced By: ASTM D1998-06 - Standard Specification for Polyethylene Upright Storage Tanks
• Effective Date: 01-Sep-2006
• Referred By: ASTM D2765-16 - Standard Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics
• Effective Date: 01-Nov-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 1998 – 04
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
1.1 This specification covers flat-bottom, upright, cylindri-
practices and determine the applicability of regulatory limita-
cal tanks molded in one-piece seamless construction by rota-
tions prior to use.
tional molding. The tanks are molded from polyethylene for
above ground, vertical installation and are capable of contain-
2. Referenced Documents
ingaggressivechemicalsatatmosphericpressure.Includedare
2
2.1 ASTM Standards:
requirements for materials, properties, design, construction,
D618 Practice for Conditioning Plastics for Testing
dimensions, tolerances, workmanship and appearance. Tank
D883 Terminology Relating to Plastics
capacities are from 1900 L [500 gal] up.
D1693 Test Method for Environmental Stress-Cracking of
1.2 This specification does not cover the design of vessels
Ethylene Plastics
intended for use at pressures other than atmospheric pressure.
D2837 Test Method for Obtaining Hydrostatic Design
Furthermore, this specification does not cover the design of
BasisforThermoplasticPipeMaterialsorPressureDesign
portable tanks. It is also not for vessels intended for use with
for Thermoplastic Pipe Products
liquids heated above their flash points, or temperatures above
D3892 Practice for Packaging/Packing of Plastics
66°C [150°F] for Type I tanks and 60°C [140°F] for Type II
D4703 Practice for Compression Molding Thermoplastic
tanks for continuous service. NFPA Standards 30 and 31 shall
Materials into Test Specimens, Plaques, or Sheets
be consulted for installations that are subject to the require-
E691 Practice for Conducting an Interlaboratory Study to
ments of these standards.
Determine the Precision of a Test Method
1.3 Special design considerations not covered in this speci-
F412 Terminology Relating to Plastic Piping Systems
fication shall be given to vessels subject to superimposed
2.2 OSHA Standard:
mechanical forces, such as seismic forces, wind load or
29 CFR 1910.106 Occupational Safety and Health Admin-
agitation; to vessels subject to service temperature in excess of
3
istration, Flammable and Combustible Liquids
23°C [73.4°F]; and vessels subject to superimposed pressure
−3 2.3 ANSI Standard:
exceeding 25.4 cm [10 in.] of water or 2.5 310 MPa [0.36
4
B-16.5 Pipe Flanges and Flanged Fittings
psi].
2.4 NFPA Standards:
1.4 The values stated in SI units are to be regarded as the
5
30 Flammable and Combustible Liquid Code
standard.Thevaluesgiveninbracketsareforinformationonly.
5
31 Installation of Oil Burning Equipment
NOTE 1—There is no similar or equivalent ISO standard.
1.5 The following precautionary caveat pertains only to the
test methods portion, Section 11, of this specification: This
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
standard does not purport to address all of the safety concerns,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1 3
This specification is under the jurisdiction of ASTM Committee D20 on Available from Occupational Safety and Health Administration (OSHA), 200
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Constitution Ave., NW, Washington, DC 20210.
4
Materials (Section D20.15.01). Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
Current edition approved November 1, 2004. Published December 2004. 4th Floor, New York, NY 10036.
5
Originally approved in 1991. Last previous edition approved in 1997 as D1998- Available from National Fire Protection Association (NFPA), 1 Batterymarch
97. Park, Quincy, MA 02269-9101.
*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.
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D1998–04
3. Terminology 5.2 All tanks used for outdoor installation shall contain an
ultraviolet stabilizer at a level adequate to give protection for
3.1 Definitions: Definitions are in accordance with Termi-
the intended service life of the tanks. This stabilizer shall be
nologies D883 and F412 and the Association of Rotational
6
compounded into the polyethylene.
Molder
...