ASTM C582-09(2016)

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 values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2016
• ICS: 83.140.20 - Laminated sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.23 - Reinforced Thermosetting Resin Piping Systems and Chemical Equipment

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C582 − 09 (Reapproved 2016)
Standard Specification for
Contact-Molded Reinforced Thermosetting Plastic (RTP)
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 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers composition, thickness, fabri-
cating procedures, and physical property requirements for glass C581 Practice for Determining Chemical Resistance of
Thermosetting Resins Used in Glass-Fiber-Reinforced
fiber reinforced thermoset polyester, vinyl ester, or other
qualified thermosetting resin laminates comprising the materi- Structures Intended for Liquid Service
D638 Test Method for Tensile Properties of Plastics
als of construction for RTP corrosion-resistant tanks, piping,
and equipment. This specification is limited to fabrication by D695 Test Method for Compressive Properties of Rigid
Plastics
contact molding.
D790 Test Methods for Flexural Properties of Unreinforced
NOTE 1—The laminates covered by this specification are manufactured
and Reinforced Plastics and Electrical Insulating Materi-
during fabrication of contact-molded RTP tanks, piping, and other
als
equipment.
NOTE 2—There is no known ISO equivalent to this standard. D883 Terminology Relating to Plastics
D2583 Test Method for Indentation Hardness of Rigid Plas-
1.2 The values stated in inch-pound units are to be regarded
tics by Means of a Barcol Impressor
as standard. The values given in parentheses are mathematical
D2584 Test Method for Ignition Loss of Cured Reinforced
conversions to SI units that are provided for information only
Resins
and are not considered standard.
D3681 Test Method for Chemical Resistance of “Fiberglass”
1.3 The following safety hazards caveat pertains only to the
(Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a
test method portion, Section 8, of this specification: This
Deflected Condition
standard does not purport to address all of the safety concerns,
E84 Test Method for Surface Burning Characteristics of
if any, associated with its use. It is the responsibility of the user
Building Materials
of this standard to establish appropriate safety, health, and
environmental practices and determine the applicability of
3. Definitions
regulatory limitations prior to use.
3.1 Definitions used in this specification are in accordance
1.4 This international standard was developed in accor-
with Terminology D883 unless otherwise indicated. The ab-
dance with internationally recognized principles on standard-
breviation for reinforced thermoset plastic is RTP.
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
copolymers.
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced
Plastic Piping Systems and Chemical Equipment. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2016. Published November 2016. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1965. Last previous edition approved in 2009 as C582 – 09. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0582-09R16. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C582 − 09 (2016)
0.125-in. (3.175-mm) thick, flat laminates with all-mat glass content of 25
3.3 vinyl ester—resins characterized by reactive unsatura-
to 30 %.
tion located predominately in terminal positions that can be
NOTE 5—Maximum flame spread designation by Test Method E84
compounded with styryl monomers and reacted to give highly
relates to measurement and description of the properties of materials,
crosslinked thermoset copolymers.
products, or systems in response to heat and flame under controlled
laboratory conditions and should not be considered or used for the
NOTE 3—These resins are handled in the same way as polyesters in
description or appraisal of the fire hazard of materials, products, or
fabrication of RTP components.
systems under actual fire conditions. However, results of this test may be
3.4 contact molding—a method of fabrication wherein the used as elements of a fire risk assessment that takes into account all the
factors that are pertinent to an assessment of the fire hazard or a particular
glass-fiber reinforcement is applied to the mold, in the form of
end use.
chopped strand mat or woven roving, by hand or from a reel,
or in the form of chopped strands of continuous-filament glass 4.1.3 Grade—In Arabic numerals, shall designate the mini-
mum physical property levels of a laminate at 73.4 6 3.6°F (23
from a chopper-spray gun. The resin matrix is applied by
various methods, including brush, roller, or spray gun. Con- 6 2°C).
solidation of the composite laminate is by rolling.
NOTE 6—The five Arabic grade numbers designate minimum physical
property levels of a laminate obtained from tests of representative
4. Classification
production process samples. They are not arbitrarily selected values.
4.1 Laminates shall be classified according to type, class,
4.1.4 Thickness—Nominal, shall be designated by Arabic
and grade.
number in decimal hundredths of an inch. (See Table 1 and
4.1.1 Type—In Roman numerals, shall designate the rein-
Table 2 for standard thicknesses.)
forcement structure comprised of specific plies of glass fiber in
NOTE 7—Table 1 and Table 2 are for reference purposes and do not
specific sequences.
preclude other laminate-type constructions, such as nonwoven biaxial or
4.1.1.1 Type I—A standard all-mat or chopped-roving
unidirectional fabric, which may be agreed upon between the buyer and
construction, or both, as shown in Table 1.
the seller, or may be added to this specification if they have been fully
4.1.1.2 Type II—A standard mat or chopped-roving and
identified and characterized, as shown in Appendix X2.
woven-roving construction, or combination thereof, as shown
4.1.5 Classification Requirements for Different Laminates—
in Table 2.
Laminate designation from Table 3 shall consist of the abbre-
4.1.1.3 Other types, such as standard mat or chopped roving
viation RTP followed by (1) type in Roman numerals; (2) class
with alternating layers of nonwoven biaxial or unidirectional
in capital letters followed by FS( ) if required; (3) grade
reinforcement in the structured plies. may be qualified in
consisting of five Arabic numbers to designate minimum levels
accordance with Appendix X2.
of physical properties and (4) thickness designated by Arabic
4.1.2 Class—In capital letters, shall designate the generic
number in decimal inches (or ALL, if properties apply to all
resin: “P” for polyester and “V” for vinyl ester. The letters
thicknesses).
“FS” followed by parenthesis, “FS( ),” shall designate fire
4.1.5.1 Examples:
retardancy, if specified, with maximum flame spread in the
(1) RTP I 1 ALL, designates Type I polyester laminate,
parentheses in accordance with Test Method E84.
non-fire-retardant Grade 13211, having the following mini-
NOTE 4—Fire retardancy by Test Method E84 is determined for mum physical property levels (see Table 3):
A
TABLE 1 Standard Laminate Composition Type I
E
Calculated Corrosion Structural Plies Drafting
BC D
Number and Sequence of Plies
Thickness Barrier Symbols
in. (mm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
0.18 (4.6) V M M M M V, 4M
0.23 (5.8) V M M M M M V, 5M
0.27 (6.9) V M M M M M M V, 6M
0.31 (7.9) V M M M M M M M V, 7M
0.35 (8.9) V M M M M M M M M V, 8M
0.40 (10.2) V M M M M M M M M M V, 9M
0.44 (11.2) V M M M M M M M M M M V, 10M
0.48 (12.2) V M M M M M M M M M M M V, 11M
0.53 (13.5) V M M M M M M M M M M M M V, 12M
0.57 (14.5) V M M M M M M M M M M M M M V, 13M
0.61 (15.5) V M M M M M M M M M M M M M M V, 14M
0.66 (16.8) V M M M M M M M M M M M M M M M V, 15M
0.70 (17.8) V M M M M M M M M M M M M M M M M V, 16M
0.74 (18.8) V M M M M M M M M M M M M M M M M M V, 17M
A
Glass content, weight, % = 25 to 30, all thickness.
B
Calculated thickness for design purposes is determined as follows:
V = Surfacing mat − 0.010 in./ply (0.25 mm/ply) when saturated with resin.
2 2
M = 1 ⁄2 oz/ft (459 g/m ) mat − 0.043 in./ply (1.1 mm/ply) when saturated with resin.
C
The thickness shall be not less than 90 % of the calculated thickness shown.
D
Corrosion barrier (Plies 1, 2, and 3) shall gel before structural plies are added.
E
Structural lay-up may be interrupted at intervals long enough to exotherm if required by the laminate manufacturing procedure and 6.3.1.
C582 − 09 (2016)
TABLE 2 Standard Laminate Composition Type II
Glass D
Calculated Corrosion Structural Plies
AB C
Content Number and Sequence of Plies Drafting
Thickness Barrier
(weight, Symbols
in. (mm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
%)
0.22 (5.6) 28 to 33 V M M M R M V, 2M, MRM
0.29 (7.4) 30 to 35 V M M M R M R M V, 2M, 2(MR)M
0.37 (9.4) 30 to 35 V M M M R M R M R M V, 2M, 3(MR)M
0.41 (10.4) 30 to 35 V M M M R M R M R M M V, 2M, 3(MR)M,
M
0.49 (12.5) 34 to 38 V M M M R M R M R M M R M V, 2M, 3(MR)M,
MRM
0.57 (14.5) 34 to 38 V M M M R M R M R M M R M R M V, 2M, 3(MR)M,
2(MR)M
0.64 (16.3) 37 to 41 V M M M R M R M R M M R M R M R M V, 2M, 3(MR)M,
3(MR)M
0.69 (17.5) 37 to 41 V M M M R M R M R M M R M R M R M M V, 2M, 3(MR)M,
3(MR)M,M
0.76 (19.3) 37 to 41 V M M M R M R M R M M R M R M R M M R M V, 2M, 3(MR)M,
3(MR)M,
MRM
A
Calculated thickness for design purposes is determined as follows:
V = Surfacing mat − 0.010 in./ply (0.25 mm/ply) when saturated with resin.
2 2
M = 1 ⁄2 oz ⁄ft (459 g/m ) mat = 0.043 in./ply (1.1 mm/ply) when saturated with resin.
2 2
R = 24 ⁄2 oz/yd (832 g/m ) 5 × 4 woven roving = 0.033 in./ply (0.84 mm/ply) when saturated with resin.
B
The thickness shall be not less than 90 % of the calculated thickness shown.
C
Corrosion barrier (Plies 1, 2, and 3) shall gel before structural plies are added.
D
Structural lay-up may be interrupted long enough to exotherm following an “M” ply, if required by the laminate manufacturing procedure. Location of exotherm plies may
be shifted within the laminate body. No plies may be omitted. Refer to 6.3.1.
A
TABLE 3 Classification System for Hand Lay-up Laminates Using Minimum Property Values
Classification Order
RTP followed by:
(1) Type I II III IV V
(2) Class P V . . . . . . . . . followed by FS ( ), if
Polyester Vinylester specified with flame
spread in parentheses in
accordance with Test
Method E84
Physical and Mechanical Properties
(3) Grade 1 2 3 4 5 6 7 8 9 0
1st Digit: Tensile strength, 9 11 13 15 17.5 20 . . . . . . . . . . . .
ultimate psi × 10
(MPa) (62) (76) (90) (104) (121) (138) . . . . . . . . . . . .
2nd Digit: Tensile modulus, 0.85 0.95 1.05 1.15 1.3 1.5 1.75 2.0 . . . . . .
tangent psi × 10
(MPa) (5 863) (6 552) (7 242) (7 932) (8 966) (10 346) (12 070) (13 794) . . . . . .
3rd Digit: Flexural strength, 16 18 20 22 24 . . . . . . . . . . . . . . .
ultimate psi × 10
(MPa) (110) (124) (138) (152) (166) . . . . . . . . . . . . . . .
4th Digit: Flexural modulus, 0.7 0.85 1.0 1.15 1.3 1.5 . . . . . . . . . . . .
psi × 10
(MPa) (4 828) (5 863) (6 897) (7 932) (8 966) (10 346) . . . . . . . . . . . .
5th Digit: Glass content, by 25 28 30 34 37 40 44 . . . . . . . . .
weight, %
A
Table will be completed as new resins and higher strength laminates become available.
Tensile strength, ultimate—9000 psi (62 MPa). (2) RTP II P FS(25) 55433.30, designates Type II, poly-
Tensile modulus—1 050 000 psi (7242 MPa). ester fire-retardant resin laminate with a maximum flame
Flexural strength, ultimate—18 000 psi (124 MPa). spread of 25, Grade 55433 having the following minimum
Flexural modulus—700 000 psi (4828 MPa). physical property levels (see Table 3):
Glass content—25 %. Tensile strength, ultimate—17 500 psi (121 MPa).
Thickness—“ALL” thicknesses. Tensile modulus—1 300 000 psi (8966 MPa).
C582 − 09 (2016)
Flexural strength, ultimate—22 000 psi (152 MPa). 5.2.3 Woven Roving, shall be “E” or “ECR” type glass, 24 ⁄2
2 2
Flexural modulus—1 000 000 psi (6897 MPa). oz/yd (832 g/m ), 5 by 4 square weave fabric having a sizing
Glass content—30 %. compatible with the resin.
Thickness—0.30 in. (7.62 mm).
5.2.4 Roving, used in chopper guns for spray-up application,
shall be “E” or “ECR” type glass with sizing compatible with
5. Materials the resin.
5.2.5 Other Reinforcements, such as nonwoven biaxial or
5.1 Resin Matrix System:
unidirectional fabric. These products shall be a commercial
5.1.1 The resin shall be determined to be acceptable for the
grade of “E” or “ECR” type glass fiber with a sizing that is
service either by test, see 8.6, or by verified case history.
compatible with the resin.
5.1.2 Catalyst/Promoter System, shall be as recommended
5.3 Laminates:
or approved by the resin producer.
5.3.1 Laminate construction shall be in accordance with the
5.1.3 Diluents, such as added styrene, fillers, dyes,
tabulated lay-up sequence for the specified type.
pigments, or flame retardants shall be used only when agreed
5.3.2 Type I, laminate structure is detailed in Table 1.
upon between the fabricator and the buyer. When such items
5.3.3 Type II, laminate structure is detailed in Table 2.
are required, limits for each shall be agreed upon between the
fabricator and the buyer. A thixotropic agent may be added to
6. Laminate Fabrication
the resin for viscosity control.
6.1 Apply the catalyzed resin to a mold or mandrel properly
NOTE 8—The addition of fillers, dyes, pigments, flame retardants, and
prepared with a parting agent or film suitable for the lay-up
thixotropic agents may interfere with visual inspection of laminate quality.
NOTE 9—Chemical resistance can be significantly affected by the resin. Next apply the specified
...

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 C582 − 09 (Reapproved 2016) An American National Standard
Standard Specification for
Contact-Molded Reinforced Thermosetting Plastic (RTP)
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 values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
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
D2583 Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor
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 can be
compounded with styryl monomers and reacted to give highly crosslinked thermoset copolymers.
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic Piping
Systems and Chemical Equipment.
Current edition approved April 1, 2009Nov. 1, 2016. Published April 2009November 2016. Originally approved in 1965. Last previous edition approved in 20022009 as
C582 – 02.C582 – 09. DOI: 10.1520/C0582-09.10.1520/C0582-09R16.
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
C582 − 09 (2016)
NOTE 3—These resins are handled in the same way as polyesters in fabrication of RTP components.
3.4 contact molding—a method of fabrication wherein the glass-fiber reinforcement is applied to the mold, in the form of
chopped strand mat or woven roving, by hand or from a reel, or in the form of chopped strands of continuous-filament glass from
a chopper-spray gun. The resin matrix is applied by various methods, including brush, roller, or spray gun. Consolidation of the
composite laminate is by rolling.
4. Classification
4.1 Laminates shall be classified according to type, class, and grade.
4.1.1 Type—In Roman numerals, shall designate the reinforcement structure comprised of specific plies of glass fiber in specific
sequences.
4.1.1.1 Type I—A standard all-mat or chopped-roving construction, or both, as shown in Table 1.
4.1.1.2 Type II—A standard mat or chopped-roving and woven-roving construction, or combination thereof, as shown in Table
2.
4.1.1.3 Other types, such as standard mat or chopped roving with alternating layers of nonwoven biaxial or unidirectional
reinforcement in the structured plies. may be qualified in accordance with Appendix X2.
4.1.2 Class—In capital letters, shall designate the generic resin: “P” for polyester and “V” for vinyl ester. The letters “FS”
followed by parenthesis, “FS( ),” shall designate fire retardancy, if specified, with maximum flame spread in the parentheses in
accordance with Test Method E84.
NOTE 4—Fire retardancy by Test Method E84 is determined for 0.125-in. (3.175-mm) thick, flat laminates with all-mat glass content of 25 to 30 %.
NOTE 5—Maximum flame spread designation by Test Method E84 relates to measurement and description of the properties of materials, products, or
systems in response to heat and flame under controlled laboratory conditions and should not be considered or used for the description or appraisal of the
fire hazard of materials, products, or systems under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment
that takes into account all the factors that are pertinent to an assessment of the fire hazard or a particular end use.
4.1.3 Grade—In Arabic numerals, shall designate the minimum physical property levels of a laminate at 73.4 6 3.6°F (23 6
2°C).
NOTE 6—The five Arabic grade numbers designate minimum physical property levels of a laminate obtained from tests of representative production
process samples. They are not arbitrarily selected values.
4.1.4 Thickness—Nominal, shall be designated by Arabic number in decimal hundredths of an inch. (See Table 1 and Table 2
for standard thicknesses.)
NOTE 7—Table 1 and Table 2 are for reference purposes and do not preclude other laminate-type constructions, such as nonwoven biaxial or
unidirectional fabric, which may be agreed upon between the buyer and the seller, or may be added to this specification if they have been fully identified
and characterized, as shown in Appendix X2.
4.1.5 Classification Requirements for Different Laminates—Laminate designation from Table 3 shall consist of the abbreviation
RTP followed by (1) type in Roman numerals; (2) class in capital letters followed by FS( ) if required; (3) grade consisting of
A
TABLE 1 Standard Laminate Composition Type I
E
Calculated Corrosion Structural Plies Drafting
BC D
Number and Sequence of Plies
Thickness Barrier Symbols
in. (mm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
0.18 (4.6) V M M M M V, 4M
0.23 (5.8) V M M M M M V, 5M
0.27 (6.9) V M M M M M M V, 6M
0.31 (7.9) V M M M M M M M V, 7M
0.35 (8.9) V M M M M M M M M V, 8M
0.40 (10.2) V M M M M M M M M M V, 9M
0.44 (11.2) V M M M M M M M M M M V, 10M
0.48 (12.2) V M M M M M M M M M M M V, 11M
0.53 (13.5) V M M M M M M M M M M M M V, 12M
0.57 (14.5) V M M M M M M M M M M M M M V, 13M
0.61 (15.5) V M M M M M M M M M M M M M M V, 14M
0.66 (16.8) V M M M M M M M M M M M M M M M V, 15M
0.70 (17.8) V M M M M M M M M M M M M M M M M V, 16M
0.74 (18.8) V M M M M M M M M M M M M M M M M M V, 17M
A
Glass content, weight, % = 25 to 30, all thickness.
B
Calculated thickness for design purposes is determined as follows:
V = Surfacing mat − 0.010 in./ply (0.25 mm/ply) when saturated with resin.
1 2 2
M = 1 ⁄2 oz/ft (459 g/m ) mat − 0.043 in./ply (1.1 mm/ply) when saturated with resin.
C
The thickness shall be not less than 90 % of the calculated thickness shown.
D
Corrosion barrier (Plies 1, 2, and 3) shall gel before structural plies are added.
E
Structural lay-up may be interrupted at intervals long enough to exotherm if required by the laminate manufacturing procedure and 6.3.1.
C582 − 09 (2016)
TABLE 2 Standard Laminate Composition Type II
D
Glass
Calculated Corrosion
Structural Plies
AB C
Content Drafting
Number and Sequence of Plies
Thickness Barrier
(weight, Symbols
in. (mm) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
%)
0.22 (5.6) 28 to 33 V M M M R M V, 2M, MRM
0.29 (7.4) 30 to 35 V M M M R M R M V, 2M, 2(MR)M
0.37 (9.4) 30 to 35 V M M M R M R M R M V, 2M, 3(MR)M
0.41 (10.4) 30 to 35 V M M M R M R M R M M V, 2M, 3(MR)M,
M
0.49 (12.5) 34 to 38 V M M M R M R M R M M R M V, 2M, 3(MR)M,
MRM
0.57 (14.5) 34 to 38 V M M M R M R M R M M R M R M V, 2M, 3(MR)M,
2(MR)M
0.64 (16.3) 37 to 41 V M M M R M R M R M M R M R M R M V, 2M, 3(MR)M,
3(MR)M
0.69 (17.5) 37 to 41 V M M M R M R M R M M R M R M R M M V, 2M, 3(MR)M,
3(MR)M,M
0.76 (19.3) 37 to 41 V M M M R M R M R M M R M R M R M M R M V, 2M, 3(MR)M,
3(MR)M,
MRM
A
Calculated thickness for design purposes is determined as follows:
V = Surfacing mat − 0.010 in./ply (0.25 mm/ply) when saturated with resin.
2 2
M = 1 ⁄2 oz ⁄ft (459 g/m ) mat = 0.043 in./ply (1.1 mm/ply) when saturated with resin.
2 2
R = 24 ⁄2 oz/yd (832 g/m ) 5 × 4 woven roving = 0.033 in./ply (0.84 mm/ply) when saturated with resin.
B
The thickness shall be not less than 90 % of the calculated thickness shown.
C
Corrosion barrier (Plies 1, 2, and 3) shall gel before structural plies are added.
D
Structural lay-up may be interrupted long enough to exotherm following an “M” ply, if required by the laminate manufacturing procedure. Location of exotherm plies may
be shifted within the laminate body. No plies may be omitted. Refer to 6.3.1.
A
TABLE 3 Classification System for Hand Lay-up Laminates Using Minimum Property Values
Classification Order
RTP followed by:
(1) Type I II III IV V
(2) Class P V . . . . . . . . . followed by FS ( ), if
Polyester Vinylester specified with flame
spread in parentheses in
accordance with Test
Method E84
Physical and Mechanical Properties
(3) Grade 1 2 3 4 5 6 7 8 9 0
1st Digit: Tensile strength, 9 11 13 15 17.5 20 . . . . . . . . . . . .
ultimate psi × 10
(MPa) (62) (76) (90) (104) (121) (138) . . . . . . . . . . . .
2nd Digit: Tensile modulus, 0.85 0.95 1.05 1.15 1.3 1.5 1.75 2.0 . . . . . .
tangent psi × 10
(MPa) (5 863) (6 552) (7 242) (7 932) (8 966) (10 346) (12 070) (13 794) . . . . . .
3rd Digit: Flexural strength, 16 18 20 22 24 . . . . . . . . . . . . . . .
ultimate psi × 10
(MPa) (110) (124) (138) (152) (166) . . . . . . . . . . . . . . .
4th Digit: Flexural modulus, 0.7 0.85 1.0 1.15 1.3 1.5 . . . . . . . . . . . .
psi × 10
(MPa) (4 828) (5 863) (6 897) (7 932) (8 966) (10 346) . . . . . . . . . . . .
5th Digit: Glass content, by 25 28 30 34 37 40 44 . . . . . . . . .
weight, %
A
Table will be completed as new resins and higher strength laminates become available.
five Arabic numbers to designate minimum levels of physical properties and (4) thickness designated by Arabic number in decimal
inches (or ALL, if properties apply to all thicknesses).
4.1.5.1 Examples:
(1) RTP I 1 ALL, designates Type I polyester laminate, non-fire-retardant Grade 13211, having the following minimum
physical property levels (see Table 3):
Tensile strength, ultimate—9000 psi (62 MPa).
Tensile modulus—1 050 000 psi (7242 MPa).
Flexural strength, ultimate—18 000 psi (124 MPa).
Flexural modulus—700 000 psi (4828 MPa).
Glass content—25 %.
Thickness—“ALL” thicknesses.
C582 − 09 (2016)
(2) RTP II P FS(25) 55433.30, designates Type II, polyester fire-retardant resin laminate with a maximum flame spread of 25,
Grade 55433 having the following minimum physical property levels (see Table 3):
Tensile strength, ultimate—17 500 psi (121 MPa).
Tensile modulus—1 300 000 psi (8966 MPa).
Flexural strength, ultimate—22 000 psi (152 MPa).
Flexural modulus—1 000 000 psi (6897 MPa).
Glass content—30 %.
Thickness—0.30 in. (7.62 mm).
5. Materials
5.1 Resin Matrix System:
5.1.1 The resin shall be determined to be acceptable for the service either by test, see 8.6, or by verified case history.
5.1.2 Catalyst/Promoter System, shall be as recommended or approved by the resin producer.
5.1.3 Diluents, such as added styrene, fillers, dyes, pigments, or flame retardants shall be used only when agreed upon between
the fabricator and the buyer. When such items are required, limits for each shall be agreed upon between the fabricator and the
buyer. A thixotropic agent may be added to the resin for viscosity control.
NOTE 8—The addition of fillers, dyes, pigments, flame retardants, and thixotropic agents may interfere with visual inspection of laminate quality.
NOTE 9—Chemical resistance can be significantly affected by the catalyst/promoter system, diluents, dyes, fillers, flame retardants, or thixotropic agent
used in the resin.
5.1.4 Resin Pastes, used where necessary to fill crevices formed by joining subassemblies before overlay shall not be subject
to the limitations of 5.1.35.1.3. Pastes shall be made with thixotropic agents.
5.1.5 Ultraviolet Absorbers, may be added to the exterior surface for improved weather resistance when agreed upon between
the fabricator and the buyer.
5.2 Fiber Reinforcement:
5.2.1 Surfacing Mat (veil) is a thin mat of fine fibers used primarily to produce a smooth surface on a reinforced plastic.
5.2.1.1 Veil shall be determined to be acceptable for the service either by Test Methods C581 or D3681, or by a verified case
history.
5.2.1.2 Requirements of acceptable surface veils are:
(a) Resin compatibility,
(a) Resin compatibility,
(b) Uniform fiber distribution,
(c) Single filaments (not bundled),
(d) The thickness shall be a minimum of 1
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