ASTM F2855-19(2024)

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: F2855 − 19 (Reapproved 2024) An American National Standard
Standard Specification for
Chlorinated Poly(Vinyl Chloride)/Aluminum/Chlorinated
Poly(Vinyl Chloride) (CPVC-AL-CPVC) Composite Pressure
Tubing
This standard is issued under the fixed designation F2855; 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.
1. Scope are chemically compatible with the tubing materials. Due to
inherent hazards associated with testing components and sys-
1.1 This specification covers a Chlorinated Poly(Vinyl
tems with compressed air or other compressed gases, some
Chloride)/Aluminum/Chlorinated Poly(Vinyl Chloride),
manufacturers do not allow pneumatic testing of their products.
(CPVC-AL-CPVC), composite pressure tubing with a welded
Consult with specific product manufacturers for their specific
aluminum tube reinforcement between the inner and outer
testing procedures prior to pneumatic testing.
layers. The inner and outer CPVC layers are bonded to the
aluminum tube by a melt adhesive. Included is a system of 1.6 The values stated in inch-pound units are to be regarded
nomenclature for the composite tubing, the requirements and as standard. The values given in parentheses are mathematical
test methods for materials, the dimensions of the component conversions to SI units that are provided for information only
layers and finished tubing, adhesion tests, hydrostatic burst and and are not considered standard.
sustained pressure and thermocycling performance. Also given
NOTE 2—Suggested hydrostatic design pressures and pressure ratings
are the requirements and methods of marking. The components
for tubing are listed in Appendix X1.
covered by this specification are intended for use in residential
1.7 The following safety hazards caveat pertains only to the
and commercial, hot and cold, potable water distribution
test method portion, Section 9. This standard does not purport
systems.
to address all of the safety concerns, if any, associated with its
NOTE 1—The text of this standard references notes and footnotes which use. It is the responsibility of the user of this standard to
provide explanatory material. These notes and footnotes (excluding those
establish appropriate safety, health, and environmental prac-
in tables and figures) shall not be considered as requirements of the
tices and determine the applicability of regulatory limitations
standard.
prior to use.
1.2 This specification covers only composite tubing incor-
1.8 This international standard was developed in accor-
porating a continuously welded aluminum tube. Tubing con-
dance with internationally recognized principles on standard-
sisting of metallic layers not continuously welded together are
ization established in the Decision on Principles for the
outside the scope of this specification.
Development of International Standards, Guides and Recom-
1.3 Specifications for internal bushings for use with com- mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
posite tubing meeting the requirements of this specification are
given in Annex A1.
2. Referenced Documents
1.4 Tubing meeting the requirements of this standard are
2.1 ASTM Standards:
designed to be used with fittings and solvent cements meeting
D696 Test Method for Coefficient of Linear Thermal Expan-
the requirements of Specification D2846/D2846M when as-
sion of Plastics Between −30°C and 30°C with a Vitreous
sembled in accordance with Annex A2. Warning—Pressurized
Silica Dilatometer
(compressed) air or other compressed gases contain large
D1600 Terminology for Abbreviated Terms Relating to Plas-
amounts of stored energy which present serious safety hazards
tics (Withdrawn 2024)
should a system fail for any reason.
D1784 Classification System and Basis for Specification for
1.5 The products covered by this specification are intended
for use with the distribution of pressurized liquids only, which
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
This specification is under the jurisdiction of ASTM Committee F17 on Plastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Piping Systems and is the direct responsibility of Subcommittee F17.61 on Water. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Feb. 1, 2024. Published February 2024. Originally the ASTM website.
approved in 2011. Last previous edition approved in 2019 as F2855 – 19. DOI: The last approved version of this historical standard is referenced on
10.1520/F2855-19R24. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2855 − 19 (2024)
Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlo- 4.2 Pressure Design Basis The CPVC-AL-CPVC compos-
rinated Poly(Vinyl Chloride) (CPVC) Compounds ite tubing shall have an established pressure design basis at
D1898 Practice for Sampling of Plastics (Withdrawn 1998) 73 °F (23 °C) of 800 psi (5.52 MPa) or greater and at 180 °F
D2122 Test Method for Determining Dimensions of Ther- (82 °C) of 200 psi (1.38 MPa) or greater in accordance with
moplastic Pipe and Fittings Test Method D2837.
D2837 Test Method for Obtaining Hydrostatic Design Basis
5. Materials
for Thermoplastic Pipe Materials or Pressure Design Basis
5.1 General—The CPVC-AL-CPVC composite tubing is
for Thermoplastic Pipe Products
D2846/D2846M Specification for Chlorinated Poly(Vinyl composed of an internal CPVC layer, adhesive layer, alumi-
num layer, adhesive layer and external CPVC layer. For tubing
Chloride) (CPVC) Plastic Hot- and Cold-Water Distribu-
tion Systems made to this specification, the constituent materials must meet
the following requirements:
E8/E8M Test Methods for Tension Testing of Metallic Ma-
terials
5.2 Aluminum—The thickness of the aluminum layer shall
F412 Terminology Relating to Plastic Piping Systems
meet the dimensions and tolerance given in Table 1. The tensile
F1281 Specification for Crosslinked Polyethylene/
properties of the aluminum material shall be a minimum tensile
Aluminum/Crosslinked Polyethylene (PEX-AL-PEX)
strength of 14 600 psi (100 MPa) and an elongation of 20 %
Pressure Pipe
when tested in accordance with Test Method E8/E8M.
2.2 Federal Standards:
5.3 Melt Adhesive—The melt adhesive that bonds the CPVC
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
layers to the Aluminum layer shall be of sufficient strength that
2.3 Military Standards:
no debonding of the layers occurs when the CPVC-AL-CPVC
MIL-STD-129 Marking for Shipment and Storage
composite tubing is tested to all the requirements in Section 6
of this standard and to the requirements for Hydrostatic Burst
2.4 NSF Standards:
Strength and CPVC Adhesives as specified in Specification
Standard No. 14 for Plastic Piping Components and Related
D2846/D2846M.
Materials
Standard No. 61 for Drinking Water Systems Components—
5.4 CPVC—The CPVC compound used to make the inner
Health Effects
and outer layers shall meet the requirements specified in 5.4.1
and 5.4.2.
3. Terminology
5.4.1 Short-Term Properties—The CPVC compound shall
meet the requirements of cell classification CPVC 23447 as
3.1 Definitions:
3.1.1 General—Definitions used in this specification are in specified in Specification D1784.
5.4.2 Long-Term Hydrostatic Strength—The CPVC com-
accordance with Terminology F412 and abbreviations are in
accordance with Terminology D1600, unless otherwise speci- pound shall have an established 180 °F (82 °C) hydrostatic
design stress of 500 psi (3.45 MPa) or greater in accordance
fied. The abbreviation for Aluminum is AL.
with Test Method D2837.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 CPVC-AL-CPVC composite tubing, n—composite 5.5 Rework Material—Rework material generated from
tubing produced by coextrusion or extrusion of layers of CPVC-AL-CPVC composite tubing shall not be used.
CPVC/Aluminum/CPVC bonded together with a melt adhe-
6. Requirements
sive. This construction is also known as “multilayer”.
6.1 General—The requirements and test methods in this
3.2.2 tubing, n—,For the purpose of this specification, pipe
specification cover CPVC-AL-CPVC composite tubing. Tests
made the specific dimensions shown in Table 1.
on the individual layers that comprise this composite tubing are
3.2.3 nominal tubing size (NTS), n—A non-dimensional
outside the scope of this specification. The raw materials used,
tubing sizing convention based on copper tubing sizing, CTS.
however, must conform to the requirements as set out in
Section 5.
4. Classification
6.2 Dimensions and Tolerance of Tubing:
4.1 Tubing—This specification classifies CPVC-AL-CPVC
6.2.1 Tubing Diameter—The minimum outside diameter
composite tubing and CPVC bushings by a maximum continu-
and tolerances of the tubing shall meet the requirements given
ous operating condition of 100 psi (690 kPa) at 180 °F (82 °C)
in Table 1, when measured in accordance Test Method D2122.
1 3
and by nominal tubing sizes of ⁄2 NTS , ⁄4 NTS and 1 NTS.
Maximum and minimum (out-of-roundness) tolerances apply
only to measurements made on tubing prior to coiling.
6.2.2 Tubing Wall Thickness:
Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
6.2.2.1 Overall Tubing Wall Thickness—The overall tube
Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
5 wall thickness shall meet the requirements given in Table 1,
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann
Arbor, MI 48113-0140, http://www.nsf.org. when measured in accordance with Test Method D2122. The
F2855 − 19 (2024)
TABLE 1 Outside Diameters, Wall Thicknesses, and Tolerances for CPVC-AL-CPVC Composite Pipe
Outside Diameter, in. (mm) Inside Diameter, in. (mm) Wall Thickness, in. (mm)
Aluminum Inner CPVC Outer CPVC
NTS Tolerance on Tolerance on Layer Layer
Average Average
Average Average Average Tolerance on Minimum Minimum
Average
⁄2 0.625 ±0.003 0.448 ±0.003 0.017 ±0.002 0.025 0.025
(15.88) (0.08) (11.38) (0.08) (0.43) (0.05) (0.64) (0.64)
⁄4 0.875 ±0.003 0.691 ±0.004 0.017 ±0.002 0.028 0.028
(22.23) (0.08) (17.55) (0.10) (0.43) (0.05) (0.71) (0.71)
1 1.125 ±0.003 0.932 ±0.005 0.017 ±0.002 0.034 0.034
(28.58) (0.08) (23.67) (0.13) (0.43) (0.05) (0.86) (0.86)
minimum wall thickness at any point of measurement of the 7.2 Special requirements for joining CPVC-AL-CPVC tub-
tube shall not be less than the value specified in Table 1. ing are contained in mandatory Annex A1 and Annex A2.
6.2.2.2 CPVC Layer Wall Thickness—The minimum wall
NOTE 4—In order to assure the expected life expectancy of CPVC-AL-
thickness at any point of measurement of the tube shall not be
CPVC composite tubing by preventing corrosion of the Aluminum, a
less than the value specified in Table 1.
bushing meeting the requirements of Annex A1 is required to be solvent
cemented into the cut ends of the CPVC-AL-CPVC tubing prior to making
NOTE 3—An optical comparator has been found to be an excellent
solvent cement joints in the piping. This bushing seals off the cut ends of
method for measuring the wall thickness of the various layers in piping. A
the tubing preventing any contact of the AL layer with any liquids being
ring is cut from the tubing and placed on the optical comparator for
transported by the tubing.
measurement determination.
8. Workmanship, Finish, and Appearance
6.2.3 Tubing Length—The tubing shall be supplied coiled or
in straight lengths as agreed upon with the purchaser and with
8.1 Workmanship—The composite tubing and associated
an allowable tolerance of +1 / -0 ft (+305 / -0 mm) for coils and
bushings shall be homogeneous throughout and free of visible
+1/2 / -0 in. (+13 / -0 mm) for straight lengths.
cracks, holes, foreign inclusions, or other defects. The tubing
and associated bushings shall be as uniform as commercially
6.3 Delamination—CPVC-AL-CPVC tubing shall not show
practicable in color, opacity, density, and other physical prop-
any separation of the CPVC layer from either side of the
erties.
aluminum layer when tested in accordance with 9.2.
6.4 Apparent Tensile Strength of Tubing—The tube rings,
9. Test Methods for Tubing
when tested in accordance with the Ring Test Method of Test
9.1 Sampling—A sufficient quantity of composite tubing, as
Method F1281, shall meet the minimum strength as specified
agreed upon between the purchaser and the seller, shall be
in Table 2.
selected from each lot or shipment and tested to determine
6.5 Hydrostatic Sustained Pressure—CPVC-AL-CPVC tub-
conformance with this specification (see Practice D1898). In
ing shall meet the minimum hydrostatic sustained pressure
the case of no prior agreement, random samples selected by the
requirements of both Test Conditions A and B, in either air or
testing laboratory shall be deemed adequate.
water shown in Table 3 when tested in accordance with the
9.1.1 Test Specimens—Not less than 50 % of the test speci-
Hydrostatic Sustained Pressure Method of Specification
mens required for any pressure test shall have at least a part of
D2846/D2846M.
the marking in their central sections. The central section is that
portion of tubing which is at least one tubing diameter away
6.6 Requirements for the, installation required, CPVC bush-
from an end closure.
ings are in mandatory Annex A1.
9.2 Delamination Test—Cut two ⁄2 in. to 1 in. rings from
7. Requirements for Joints made with Solvent Cement
the tubing to be tested. Using a band saw, slice each ring
7.1 CPVC-AL-CPVC joints made with solvent cement shall
lengthwise into two approximately equal semicircular, arc-
meet the Requirements for Solvent Cement and Adhesive shaped specimens. The Slice on the second ring shall be at 90°
Joints of Specification D2846/D2846M when assembled in
from the slice on the first ring so that each of the four
accordance with Annex A2 as specified for: specimens represents one quadrant of the circumference of the
7.1.1 Hydrostatic Burst Strength
pipe. One specimen must have the print line at the center of the
7.1.1.1 The specimen size for the Hydrostatic Burst arc. With pliers grasp the opposing ends of arc and bend back
Strength shall be 1 NTS.
the edges so that the outside edges of the arcs meet. When the
7.1.2 Hydrostatic Sustained Pressure Strength bent specimen is visually inspected, failu
...