ASTM D1998-97

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 66°C (150°F) for Type I tanks and 60°C (140°F) for Type II tanks for continuous service. NFPA Standards 30 and 31 should be consulted for installations which may be subject to the requirements of these standards.  
1.3 Special design considerations not covered in this specification should be given to vessels subject to superimposed mechanical forces, such as seismic forces, windload or agitation; to vessels subject to service temperature in excess of 23°C (73.4°F); and vessels subject to superimposed pressure exceeding 25.4 cm (10 in.) of water or 2.5 X 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 parentheses are for information only.
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 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: 09-Nov-1997
• ICS: 23.020.10 - Stationary containers and tanks
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaced By: ASTM D1998-04 - Standard Specification for Polyethylene Upright Storage Tanks
• Effective Date: 01-Nov-2004
• Referred By: ASTM D2765-16 - Standard Test Methods for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics
• Effective Date: 10-Nov-1997

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 – 97
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 * D618 Practice for Conditioning Plastics and Electrical
2
Insulating Materials for Testing
1.1 This specification covers flat-bottom, upright, cylindri-
2
D883 Terminology Relating to Plastics
cal tanks molded in one-piece seamless construction by rota-
D1693 Test Method for Environmental Stress-Cracking of
tional molding. The tanks are molded from polyethylene for
2
Ethylene Plastics
above-ground, vertical installation and are capable of contain-
D2837 Test Method for Obtaining Hydrostatic Design
ingaggressivechemicalsatatmosphericpressure.Includedare
3
Basis for Thermoplastic Pipe Materials
requirements for materials, properties, design, construction,
4
D3892 Practice for Packaging/Packing of Plastics
dimensions, tolerances, workmanship and appearance. Tank
D4703 Practice for Compression Molding Thermoplastic
capacities are from 1900 L (500 gal) up.
5
Materials into Test Specimens, Plaques, or Sheets
1.2 This specification does not cover the design of vessels
E691 Practice for Conducting an Interlaboratory Study to
intended for use at pressures other than atmospheric pressure.
6
Determine the Precision of a Test Method
Furthermore, this specification does not cover the design of
3
F412 Terminology Relating to Plastic Piping Systems
portable tanks. It is also not for vessels intended for use with
2.2 OSHA Standard:
liquids heated above their flash points, or temperatures above
29 CFR 1910.106 Occupational Safety and Health Admin-
66°C (150°F) for Type I tanks and 60°C (140°F) for Type II
7
istration, Flammable and Combustible Liquids
tanks for continuous service. NFPA Standards 30 and 31
2.3 ANSI Standard:
should be consulted for installations which may be subject to
8
B-16.5 Pipe Flanges and Flanged Fittings
the requirements of these standards.
2.4 NFPA Standards:
1.3 Special design considerations not covered in this speci-
9
30 Flammable and Combustible Liquid Code
fication should be given to vessels subject to superimposed
9
31 Installation of Oil Burning Equipment
mechanical forces, such as seismic forces, windload or agita-
tion;tovesselssubjecttoservicetemperatureinexcessof23°C
3. Terminology
(73.4°F);andvesselssubjecttosuperimposedpressureexceed-
−3 3.1 Definitions: Definitions are in accordance with Termi-
ing 25.4 cm (10 in.) of water or 2.5 310 MPa (0.36 psi).
nologies D883 and F412 and the Association of Rotational
1.4 The values stated in SI units are to be regarded as the
10
Molders (ARM) Glossary of Terms, unless otherwise indi-
standard. The values given in parentheses are for information
cated.
only.
3.2 Definitions of Terms Specific to This Standard:
NOTE 1—There is no similar or equivalent ISO standard.
3.2.1 impact failure, n—any crack in the test specimen
resulting from the impact and visible in normal room lighting
1.5 The following precautionary caveat pertains only to the
test methods portion, Section 11, of this specification: This to a person with normal eyesight.
3.2.2 rotational molding, n—a three-stage commercial pro-
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user cess consisting of loading the mold with powdered resin,
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
tions prior to use. 2
Annual Book of ASTM Standards, Vol 08.01.
3
Annual Book of ASTM Standards, Vol 08.04.
4
2. Referenced Documents
Annual Book of ASTM Standards, Vol 08.02.
5
Annual Book of ASTM Standards, Vol 08.03.
2.1 ASTM Standards:
6
Annual Book of ASTM Standards, Vol 14.02.
7
Available from OSHA, 2900 Newton St., NE, Washington, DC 20018.
8
Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036.
1 9
This specification is under the jurisdiction of ASTM Committee D-20 on Available from National Fire Protection Association, Batterymarch Park,
Plastics and is the direct responsibility of Subcommittee D20.12 on Olefin Plastics. Quincy, MA 02269.
10
Current edition approved Nov. 10, 1997. Published April 1998. Originally Available fromAssociation of Rotational Molders, 435 North MichiganAve.,
published as D1998–91. Last previous edition D1998–96. Suite 1717, Chicago, IL 60611-4067.
*A Summary of Changes section appears at the end of this standard.
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