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ACTIVE STANDARD: ASTM D1998-06 Standard
Specification for Polyethylene Upright Storage Tanks
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For standard specifications for Polyethylene Upright Storage Plastic Tanks
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 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 [150°F] for Type I
tanks and 60°C [140°F] 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 23°C [73.4°F]; 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 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.
2. Referenced Documents
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
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F412 Terminology Relating to Plastic Piping Systems
2.3
2.4
29 CFR 1910.106 Occupational Safety and Health Administration, Flammable and Combustible Liquids
30 Flammable and Combustible Liquid Code
31 Installation of Oil Burning Equipment
B-16.5 Pipe Flanges and Flanged Fittings
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standard specifications for Polyethylene Upright Storage Plastic Tanks
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