ASTM D4726-00
(Specification)Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Exterior-Profile Extrusions Used for Assembled Windows and Doors
Standard Specification for Rigid Poly(Vinyl Chloride) (PVC) Exterior-Profile Extrusions Used for Assembled Windows and Doors
SCOPE
1.1 This specification establishes requirements for the material properties, including dimensional stability, weatherability, and extrusion quality, of rigid poly(vinyl chloride) (PVC) exterior profile extrusions used for assembled windows and doors. Methods for testing and for identifying exterior profile extrusions that comply with this specification are also provided.
1.2 Rigid PVC recycled plastic may be used in this product in accordance with requirements in Section 5.
Note 1—Information with regard to application, assembly, and installation should be obtained from the manufacturers of the profiles and of the windows and doors.
Note 2—Refer to Specification D 3678 for interior profile extrusions.
1.3 Color-hold guidelines are provided in an appendix for the manufacturer's product development and quality performance use.
1.4 Color-hold guidelines are presently limited to white, grey, beige, light brown, and dark brown (see Figs. X1.1 through X1.5). Additional colors will be added as color guidelines are developed.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.
Note 3—There are no ISO standards covering the primary subject matter of this specification.
1.6 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.
1.7 The following safety hazards caveat pertains only to the test methods portion, Section 10, 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.
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Designation: D 4726 – 00 An American National Standard
Standard Specification for
Rigid Poly(Vinyl Chloride) (PVC) Exterior-Profile Extrusions
Used for Assembled Windows and Doors
This standard is issued under the fixed designation D 4726; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope * 2. Referenced Documents
1.1 This specification establishes requirements for the ma- 2.1 ASTM Standards:
terial properties, including dimensional stability, weatherabil- D 618 Practice for Conditioning Plastics and Electrical
ity, and extrusion quality, of rigid poly(vinyl chloride) (PVC) Insulating Materials for Testing
exterior profile extrusions used for assembled windows and D 883 Terminology Relating to Plastics
doors. Methods for testing and for identifying exterior profile D 1042 Test Method for Linear Dimensional Changes of
extrusions that comply with this specification are also pro- Plastics Under Accelerated Service Conditions
vided. D 1435 Practice for Outdoor Weathering of Plastics
1.2 Rigid PVC recycled plastic may be used in this product D 1600 Terminology Relating to Abbreviations, Acronyms,
in accordance with requirements in Section 5. and Codes for Terms Relating to Plastics
D 1898 Practice for Sampling of Plastics
NOTE 1—Information with regard to application, assembly, and instal-
D 2244 Test Method for Calculation of Color Differences
lation should be obtained from the manufacturers of the profiles and of the
from Instrumentally Measured Color Coordinates
windows and doors.
D 3678 Specification for Rigid Poly(Vinyl Chloride) (PVC)
NOTE 2—Refer to Specification D 3678 for interior profile extrusions.
Interior-Profile Extrusions
1.3 Color-hold guidelines are provided in an appendix for
D 3892 Practice for Packaging/Packing of Plastics
the manufacturer’s product development and quality perfor-
D 4099 Specification for Poly(Vinyl Chloride) (PVC) Prime
mance use.
Windows
1.4 Color-hold guidelines are presently limited to white,
D 4216 Specification for Rigid Poly(Vinyl Chloride) (PVC)
grey, beige, light brown, and dark brown (see Figs. X1.1
and Related Plastic Building Products Compounds
through X1.5). Additional colors will be added as color
D 4226 Test Method for Impact Resistance of Rigid Poly-
guidelines are developed.
(Vinyl Chloride) (PVC) Building Products
1.5 The values stated in inch-pound units are to be regarded
D 5033 Guide for the Development of Standards Relating to
as the standard. The values in parentheses are for information
the Proper Use of Recycled Plastics
only.
E 631 Terminology of Building Constructions
NOTE 3—There are no ISO standards covering the primary subject
E 805 Practice for Identification of Instrumental Methods of
matter of this specification. 8
Color or Color-Difference, Measurement of Materials
1.6 The text of this standard references notes and footnotes G 147 Practice for Conditioning and Handling of Nonme-
which provide explanatory material. These notes and footnotes tallic Materials for Natural and Artificial Weathering Tests
(excluding those in tables and figures) shall not be considered
3. Terminology
as requirements of this standard.
1.7 The following safety hazards caveat pertains only to the 3.1 General—Definitions are in accordance with Termi-
test methods portion, Section 10, of this specification: This nologies D 883 or E 631 and D 1600, unless otherwise indi-
standard does not purport to address all of the safety concerns, cated.
if any, associated with its use. It is the responsibility of the user 3.2 Definitions of Terms Specific to This Standard:
of this standard to establish appropriate safety and health 3.2.1 beige PVC profile—a profile the color of which is
practices and determine the applicability of regulatory limita- defined by the color space falling within the parameters L 5
H
tions prior to use.
Annual Book of ASTM Standards, Vol 08.01.
Annual Book of ASTM Standards, Vol 08.02.
1 4
This specification is under the jurisdiction of ASTM Committee D-20 on Annual Book of ASTM Standards, Vol 06.01.
Plastics and is the direct responsibility of Subcommittee D20.24 on Plastic Building Annual Book of ASTM Standards, Vol 08.04.
Products. Annual Book of ASTM Standards, Vol 08.03.
Current edition approved Mar. 10, 2000. Published July 2000. Originally Annual Book of ASTM Standards, Vol 04.07.
e1 8
published as D 4726 – 87. Last previous edition D 4726 – 98 . Annual Book of ASTM Standards, Vol 14.02.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
D 4726
61 to 87, a 5 −2.5 to 4.0, and b 5 6.5 to 23. 5.3 The PVC compound in extruded section shall maintain
H H
3.2.2 color-hold guidelines—predictive target color regions uniform color and be free of any visual surface or structural
within a three-dimensional model which constitute acceptable changes, such as peeling, chipping, cracking, flaking, or
appearance retention levels of color change resulting from pitting.
weathering of a specific product type and color. 5.4 Rework Material—Clean, homogeneous PVC rework
material or rework material containing PVC capstock gener-
NOTE 4—Commercial products which demonstrate weathering behav-
ated from the manufacturer’s own production of the same class
ior within reasonable conformance to these target guidelines during a
compound may be used by the same manufacturer providing
2-year test period can be anticipated to weather without exhibiting
that the extruded profiles meet all the requirements of this
unacceptable color changes.
specification. Clean principally PVC rework material contain-
3.2.3 dark brown PVC profile—a profile the color of which
ing non-PVC capstock may be used only in the substrate of a
is defined by the color space falling within the parameters L
H
capstocked product by the same manufacturer, providing that
5 13 to 33, a 5 −1.0 to 6.0, and b 5 1.0 to 6.5.
H H
the extruded profiles meet all of the requirements of this
3.2.4 gray PVC profile—a profile the color of which is
specification.
defined by the color space falling within the parameters L 5
H
5.5 The PVC compound shall have a minimum impact
33 to 74, a 5 −3 to 4, and b 5 −5.5 to 5.5.
H H
resistance of 0.6 in·lb/mil (2670 J/m) after weathering for 6
3.2.5 light brown PVC profile—a profile the color of which
months and 1 year in a hot, dry climate such as Phoenix, AZ;
is defined by the color space falling within the parameters L
H
a hot, humid climate, such as Miami, FL; and a temperate
5 30 to 60, a 5 −1.5 to 12.5, and b 5 3.0 to 12.5.
H H
northern climate.
3.2.6 temperate northern climate—in weather testing, a
5.6 The PVC compound in extruded section shall maintain
North American metropolitan area testing site located within
uniform color and be free of any surface or structural changes,
73 to 100° W longitude and 37 to 45° N latitude.
such as peeling, chipping, cracking, flaking, or pitting after
3.2.7 white PVC profile—a profile the color of which is
weathering for 6 months and 1 year for white and for 6 months,
defined by the color space falling within the parameters L 5
H
1 year, and 2 years for all other colors in a hot, dry climate,
83 to 100, a 5 −4 to 0, and b 5 −5.5 to +5.5.
H H
such as Phoenix, AZ; a hot, humid climate, such as Miami, FL;
NOTE 5—L , a , b is determined in accordance with the Hunter L ,
H H H H
and a temperate northern climate.
a , b opponent color space system in Test Method D 2244.
H H
5.7 The PVC compound shall have successfully met the
4. Significance and Use weathering requirements prescribed in 5.4 and 5.5 for 6 months
at each climatic testing site prior to use in production of
4.1 The purpose of this specification is to establish a
exterior-profile extrusions for either market development or
recognized standard of quality for rigid poly(vinyl chloride)
sales.
(PVC) exterior weatherable profile extrusions for use in
assembling windows and doors. The information contained in
NOTE 8—The 6-month-test requirement constitutes a screening process
this specification is intended to be helpful to producers,
to eliminate catastrophic failure in the marketplace.
distributors, and users, and to promote understanding between
6. Physical Requirements
buyers and sellers. It is also intended to serve as the basis for
specification requirements of exterior windows and doors 6.1 Dimensions—The size, thickness, and dimensional tol-
which are made from rigid PVC profile extrusions in their erances of the exterior profiles shall be as agreed upon between
construction. the supplier and the purchaser in the purchase order, or by
established internal process control standards.
NOTE 6—Refer to Specification D 4099 for PVC prime window speci-
6.2 Dimensional Stability—The dimensional stability of the
fication.
exterior-profile extrusions shall be determined in accordance
5. Materials and Manufacture
with 10.3. Extrusions over 0.040 in. (1.02 mm) shall have a
5.1 The profile extrusions used for assembled windows and maximum average shrinkage of 2.2 % for all sides measured,
with no single value exceeding 2.4 %. Extrusions of 0.040 in.
doors shall be made principally of weatherable, rigid poly(vi-
nyl chloride) (PVC) compound classified in accordance with (1.02 mm) or less shall have a maximum average shrinkage of
the properties described in Specification D 4216. Extrusions 3%.
shall meet one of the following cell classifications: Class 6.3 Impact Resistance—Flat sections of the exterior profile
1-10154-33, Class 1-20131-13, or Class 1-40131-13. (See the extrusion shall have a minimum brittle impact failure of 1.0
Table on Class Requirements for Rigid Poly(Vinyl Chloride) in·lb/mil (4450 J/m) when tested in accordance with Test
(PVC) and Related Plastic Compounds for Building Products Methods D 4226, Procedure B, using impactor C.125. Refer to
in Specification D 4216.) 10.4.
7. Performance Requirements
NOTE 7—Non-PVC materials may be used as a capstock.
5.2 Rigid PVC recycled plastic, as defined in Guide D 5033, 7.1 Weathering:
may be used in this product if all the requirements in the 7.1.1 The exposures listed in Table 1 shall be conducted in
sections on Terminology (Section 3), Materials and Manufac- order to meet the requirements of this specification. All
ture (Section 5), Physical Requirements (Section 6) and Per- exposures shall be conducted at an angle of 45° S, plywood-
formance Requirements (Section 7) are met by the extrusions backed, in accordance with Practice D 1435 and Practice G
containing PVC recycled plastic. 147.
D 4726
TABLE 1 Required Exposures for PVC Extrusions
to the requirements of this specification. Each producer or
Color of PVC Required Exposure distributor who represents his products as conforming to this
Exposure Climate
A
Extrusion Times, months
specification may use statistically based sampling plans that are
White hot, dry (Phoenix, AZ) 6 and 12
appropriate to each manufacturing process, but shall keep such
hot, humid (Miami, FL) 6 and 12
essential records as are necessary to document with a high
northern temperate 6 and 12
Any other color hot, dry (Phoenix, AZ) 6, 12, and 24 degree of assurance his claim that all of the requirements of
hot, humid (Miami, FL) 6, 12, and 24
this specification have been met. Additional sampling and
northern temperate 6, 12, and 24
testing of the product, as may be agreed upon between the
A
It is recommended that separate specimens be used for each exposure time.
supplier and the purchaser, is not precluded by this section.
10.2 Conditioning of Specimens—Condition the test speci-
mens in accordance with Procedure A of Practice D 618. For
7.1.2 After 6-months and 1-year exposure times, the mini-
the purpose of quality control testing, the minimum condition-
mum mean impact for 20 measurements conducted on the
ing time shall be 4 h.
exposed specimens shall be at least 0.6 in·lb/mil (2670 J/m).
10.3 Dimensional Stability—Determine the dimensional
Test impact in accordance with 10.4, A1.4, and A1.5.
stability in accordance with Test Method D 1042, except that
7.1.3 After each exposure time, the tested specimens shall
the test cycle shall consist of heating the specimens for 30 min
maintain a uniform color and be free of any visual surface or
in a uniformly heated water bath at a temperature of 180 6
structural changes such as peeling, chipping, cracking, flaking,
1.8°F (82 6 1.0°C), then conditioning the specimens for no
and pitting when tested in accordance with Annex A1.
less than1hin accordance with Procedure A of Practice D 618,
NOTE 9—It is recommended that manufacturers use the color-hold
followed by measurement.
guidelines in Appendix X1 to ensure quality performance.
10.4 Impact Test—Determine the impact strength in accor-
7.1.4 Weatherability conformance testing requirements are
dance with Test Methods D 4226, Procedure B, using the
to reflect performance of a “typical” extrusion system profile
C.125 impactor.
representing a specific PVC compound and a specific extrusion
technology. In no case is there an implied requirement for
11. Packing, Packaging, and Package Marking
testing all the various shaped profiles. The lengthy outdoor
weatherability testing shall be performed concurrently with 11.1 The exterior profile extrusions shall be packaged in
market development of new applications and sales of profiles
such a manner as to provide reasonable protection against
to existing markets. Completion of weatherability testing prior damage in ordinary handling, transportation, and storage.
to marketing of the product is not required. The profile
11.2 Provisions of Practice D 3892 shall apply to this
extrusion producer shall immediately respond in terms of
specification.
compound change or extrusion technology change to unsatis-
11.3 Marking on each package of extruded profile extru-
factory weatherability behavior of the profiles under test in any
sions shall include the following:
climatic test site at any stage of the weatherability testing.
11.3.1 Manufacturer’s name or trademark;
8. Workmanship, Finish, and Appearance
11.3.2 Identity of code number of extrusion profiles;
8.1 The extrusions shall be acceptable between the buyer 11.3.3 Class of compound (Specification D 4216) used in
and the seller or meet internal process control standards in
profiles;
section, color, and finish. The extrusions shall be substantially
11.3.4 The designation ASTM D 4726, affirming that the
straight and free from defects that might affect appearance
...
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