ASTM C582-23

Standard Specification for Contact-Molded Reinforced Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant Equipment

ABSTRACT
This specification covers composition, thickness, fabricating procedures, and physical property requirements for glass fiber reinforced thermoset polyester, vinyl ester, or other qualified thermosetting resin laminates comprising the materials of construction for RTP corrosion-resistant tanks, piping, and equipment. This specification is limited to fabrication by contact molding. Laminates shall be classified according to type, class, and grade: Types I and II; Classes P and V. Tensile strength and tangent modulus of elasticity, flexural strength, glass content, thickness, hardness, chemical resistance, and surface flame-spread classification tests shall be performed to conform to the specified requirements.
SCOPE
1.1 This specification covers composition, thickness, fabricating procedures, and physical property requirements for glass fiber reinforced thermoset polyester, vinyl ester, or other qualified thermosetting resin laminates comprising the materials of construction for RTP corrosion-resistant tanks, piping, and equipment. This specification is limited to fabrication by contact molding.  
Note 1: The laminates covered by this specification are manufactured during fabrication of contact-molded RTP tanks, piping, and other equipment.
Note 2: There is no known ISO equivalent to this standard.  
1.2 The values stated in inch-pound units are to be regarded as standard. The SI values given in parentheses are conversions from inch-pound units and are for information only.  
1.3 The following safety hazards caveat pertains only to the test method portion, Section 8, 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.  
1.4 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.

General Information

• Status: Published
• Publication Date: 31-Mar-2023
• ICS: 83.140.20 - Laminated sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.23 - Reinforced Thermosetting Resin Piping Systems and Chemical Equipment

Relations

• Refers: ASTM C581-20 - Standard Practice for Determining Chemical Resistance of Thermosetting Resins Used in Glass-Fiber-Reinforced Structures Intended for Liquid Service
• Effective Date: 15-Feb-2020

Standards Content (Sample)

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: C582 − 23
Standard Specification for
Contact-Molded Reinforced Thermosetting Plastic (RTP)
1
Laminates for Corrosion-Resistant Equipment
This standard is issued under the fixed designation C582; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope C581 Practice for Determining Chemical Resistance of
Thermosetting Resins Used in Glass-Fiber-Reinforced
1.1 This specification covers composition, thickness, fabri-
Structures Intended for Liquid Service
cating procedures, and physical property requirements for glass
D638 Test Method for Tensile Properties of Plastics
fiber reinforced thermoset polyester, vinyl ester, or other
D695 Test Method for Compressive Properties of Rigid
qualified thermosetting resin laminates comprising the materi-
Plastics
als of construction for RTP corrosion-resistant tanks, piping,
D790 Test Methods for Flexural Properties of Unreinforced
and equipment. This specification is limited to fabrication by
and Reinforced Plastics and Electrical Insulating Materi-
contact molding.
als
NOTE 1—The laminates covered by this specification are manufactured
D883 Terminology Relating to Plastics
during fabrication of contact-molded RTP tanks, piping, and other
D2583 Test Method for Indentation Hardness of Rigid Plas-
equipment.
3
tics by Means of a Barcol Impressor (Withdrawn 2022)
NOTE 2—There is no known ISO equivalent to this standard.
D2584 Test Method for Ignition Loss of Cured Reinforced
1.2 The values stated in inch-pound units are to be regarded
Resins
as standard. The SI values given in parentheses are conversions
D3681 Test Method for Chemical Resistance of “Fiberglass”
from inch-pound units and are for information only.
(Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a
1.3 The following safety hazards caveat pertains only to the
Deflected Condition
test method portion, Section 8, of this specification: This
E84 Test Method for Surface Burning Characteristics of
standard does not purport to address all of the safety concerns,
Building Materials
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety, health, and
3. Definitions
environmental practices and determine the applicability of
3.1 Definitions used in this specification are in accordance
regulatory limitations prior to use.
with Terminology D883 unless otherwise indicated. The ab-
1.4 This international standard was developed in accor-
breviation for reinforced thermoset plastic is RTP.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.2 polyester—resins produced by the polycondensation of
Development of International Standards, Guides and Recom- dihydroxyderivatives and dibasic organic acids or anhydrides,
mendations issued by the World Trade Organization Technical wherein at least one component contributes ethylenic unsatu-
Barriers to Trade (TBT) Committee. ration yielding resins that can be compounded with styryl
monomers and reacted to give highly crosslinked thermoset
2. Referenced Documents
copolymers.
2
2.1 ASTM Standards:
3.3 vinyl ester—resins characterized by reactive unsatura-
tion located predominately in terminal positions that can be
compounded with styryl monomers and reacted to give highly
1
This specification is under the jurisdiction of ASTM Committee D20 on
crosslinked thermoset copolymers.
Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced
Thermosetting Resin Piping Systems and Chemical Equipment.
NOTE 3—These resins are handled in the same way as polyesters in
Current edition approved April 1, 2023. Published April 2023. Originally
fabrication of RTP components.
approved in 1965. Last previous edition approved in 2016 as C582 – 09(2016). DOI:
10.1520/C0582-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C582 − 23
used as elements of a
...

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: C582 − 09 (Reapproved 2016) C582 − 23
Standard Specification for
Contact-Molded Reinforced Thermosetting Plastic (RTP)
1
Laminates for Corrosion-Resistant Equipment
This standard is issued under the fixed designation C582; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers composition, thickness, fabricating procedures, and physical property requirements for glass fiber
reinforced thermoset polyester, vinyl ester, or other qualified thermosetting resin laminates comprising the materials of construction
for RTP corrosion-resistant tanks, piping, and equipment. This specification is limited to fabrication by contact molding.
NOTE 1—The laminates covered by this specification are manufactured during fabrication of contact-molded RTP tanks, piping, and other equipment.
NOTE 2—There is no known ISO equivalent to this standard.
1.2 The values stated in inch-pound units are to be regarded as standard. The SI values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.conversions from inch-pound units
and are for information only.
1.3 The following safety hazards caveat pertains only to the test method portion, Section 8, 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.
1.4 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:
C581 Practice for Determining Chemical Resistance of Thermosetting Resins Used in Glass-Fiber-Reinforced Structures
Intended for Liquid Service
D638 Test Method for Tensile Properties of Plastics
D695 Test Method for Compressive Properties of Rigid Plastics
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D883 Terminology Relating to Plastics
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic
Thermosetting Resin Piping Systems and Chemical Equipment.
Current edition approved Nov. 1, 2016April 1, 2023. Published November 2016April 2023. Originally approved in 1965. Last previous edition approved in 20092016 as
C582 – 09.C582 – 09(2016). DOI: 10.1520/C0582-09R16.10.1520/C0582-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C582 − 23
3
D2583 Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor (Withdrawn 2022)
D2584 Test Method for Ignition Loss of Cured Reinforced Resins
D3681 Test Method for Chemical Resistance of “Fiberglass” (Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a Deflected
Condition
E84 Test Method for Surface Burning Characteristics of Building Materials
3. Definitions
3.1 Definitions used in this specification are in accordance with Terminology D883 unless otherwise indicated. The abbreviation
for reinforced thermoset plastic is RTP.
3.2 polyester—resins produced by the polycondensation of dihydroxyderivatives and dibasic organic acids or anhydrides, wherein
at least one component contributes ethylenic unsaturation yielding resins that can be compounded with styryl monomers and
reacted to give highly crosslinked thermoset copolymers.
3.3 vinyl ester—resins characterized by reactive unsaturation located predominately in terminal positions that
...