ASTM F2855-11
(Specification)Standard Specification for Chlorinated Poly(Vinyl Chloride)/Aluminum/Chlorinated Poly(Vinyl Chloride) (CPVC-AL-CPVC) Composite Pressure Tubing
Standard Specification for Chlorinated Poly(Vinyl Chloride)/Aluminum/Chlorinated Poly(Vinyl Chloride) (CPVC-AL-CPVC) Composite Pressure Tubing
ABSTRACT
This specification covers a Chlorinated Poly(Vinyl Chloride)/Aluminum/Chlorinated Poly(Vinyl Chloride), (CPVC AL CPVC), composite pressure tubing with a welded aluminum tube reinforcement between the inner and outer layers. The inner and outer CPVC layers are bonded to the aluminum tube by a melt adhesive. The components covered by this specification are intended for use in residential and commercial, hot and cold, potable water distribution systems. This specification covers only composite tubing incorporating a continuously welded aluminum tube.
SCOPE
1.1 This specification covers a Chlorinated Poly(Vinyl Chloride)/Aluminum/Chlorinated Poly(Vinyl Chloride), (CPVC AL CPVC), composite pressure tubing with a welded aluminum tube reinforcement between the inner and outer layers. The inner and outer CPVC layers are bonded to the aluminum tube by a melt adhesive. Included is a system of nomenclature for the composite tubing, the requirements and test methods for materials, the dimensions of the component layers and finished tubing, adhesion tests, hydrostatic burst and sustained pressure and thermocycling performance. Also given are the requirements and methods of marking. The components covered by this specification are intended for use in residential and commercial, hot and cold, potable water distribution systems.
Note 1—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 the standard.
1.2 This specification covers only composite tubing incorporating a continuously welded aluminum tube. Tubing consisting of metallic layers not continuously welded together are outside the scope of this specification.
1.3 Specifications for internal bushings for use with composite tubing meeting the requirements of this specification are given in Annex A1.
Note 2—In order to assure the expected life expectancy of CPVC-AL-CPVC composite tubing by preventing corrosion of the Aluminum, a 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 solvent cement joints in the piping. This bushing seals off the cut ends of the tubing preventing any contact of the AL layer with any liquids being transported by the tubing.
1.4 Tubing meeting the requirements of this standard are designed to be used with fittings and solvent cements meeting the requirements of Specification D2846/D2846M when assembled in accordance with Appendix X3.
1.5 The products covered by this specification are intended for use with the distribution of pressurized liquids only, which are chemically compatible with the tubing materials. Due to inherent hazards associated with testing components and systems with compressed air or other compressed gases some manufacturers do not allow pneumatic testing of their products. Consult with specific product manufacturers for their specific testing procedures prior to pneumatic testing.
Note 3—Pressurized (compressed) air or other compressed gases contain large amounts of stored energy which present serious safety hazards should a system fail for any reason.
1.6 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.
Note 4—Suggested hydrostatic design pressures and pressure ratings for tubing are listed in Appendix X1.
1.7 The following safety hazards caveat pertains only to the test method portion, Section 9. 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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Standards Content (Sample)
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An American National Standard
Designation: F2855 – 11
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 the requirements of Specification D2846/D2846M when as-
sembled in accordance with Appendix X3.
1.1 This specification covers a Chlorinated Poly(Vinyl
1.5 The products covered by this specification are intended
Chloride)/Aluminum/Chlorinated Poly(Vinyl Chloride),
for use with the distribution of pressurized liquids only, which
(CPVC AL CPVC), composite pressure tubing with a welded
are chemically compatible with the tubing materials. Due to
aluminum tube reinforcement between the inner and outer
inherent hazards associated with testing components and sys-
layers. The inner and outer CPVC layers are bonded to the
tems with compressed air or other compressed gases some
aluminum tube by a melt adhesive. Included is a system of
manufacturersdonotallowpneumatictestingoftheirproducts.
nomenclature for the composite tubing, the requirements and
Consult with specific product manufacturers for their specific
test methods for materials, the dimensions of the component
testing procedures prior to pneumatic testing.
layers and finished tubing, adhesion tests, hydrostatic burst and
sustained pressure and thermocycling performance.Also given
NOTE 3—Pressurized (compressed) air or other compressed gases
are the requirements and methods of marking.The components
contain large amounts of stored energy which present serious safety
hazards should a system fail for any reason.
covered by this specification are intended for use in residential
and commercial, hot and cold, potable water distribution
1.6 The values stated in inch-pound units are to be regarded
systems.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
NOTE 1—The text of this standard references notes and footnotes which
and are not considered standard.
provide explanatory material. These notes and footnotes (excluding those
in tables and figures) shall not be considered as requirements of the
NOTE 4—Suggested hydrostatic design pressures and pressure ratings
standard.
for tubing are listed in Appendix X1.
1.2 This specification covers only composite tubing incor-
1.7 The following safety hazards caveat pertains only to the
porating a continuously welded aluminum tube. Tubing con-
test method portion, Section 9. This standard does not purport
sisting of metallic layers not continuously welded together are
to address all of the safety concerns, if any, associated with its
outside the scope of this specification.
use. It is the responsibility of the user of this standard to
1.3 Specifications for internal bushings for use with com-
establish appropriate safety and health practices and deter-
posite tubing meeting the requirements of this specification are
mine the applicability of regulatory limitations prior to use.
given in Annex A1.
2. Referenced Documents
NOTE 2—In order to assure the expected life expectancy of CPVC-AL-
CPVC composite tubing by preventing corrosion of the Aluminum, a
2.1 ASTM Standards:
bushing meeting the requirements of Annex A1 is required to be solvent
D696 Test Method for Coefficient of Linear Thermal Ex-
cementedintothecutendsoftheCPVC-AL-CPVCtubingpriortomaking
pansion of Plastics Between Ø30°C and 30°C with a
solvent cement joints in the piping. This bushing seals off the cut ends of
Vitreous Silica Dilatometer
the tubing preventing any contact of the AL layer with any liquids being
D1600 Terminology for Abbreviated Terms Relating to
transported by the tubing.
Plastics
1.4 Tubing meeting the requirements of this standard are
D1784 Specification for Rigid Poly(Vinyl Chloride) (PVC)
designed to be used with fittings and solvent cements meeting
Compounds and Chlorinated Poly(Vinyl Chloride)
1 2
This specification is under the jurisdiction ofASTM Committee F17 on Plastic For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Piping Systems and is the direct responsibility of Subcommittee F17.61 on Water. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Feb. 1, 2011. Published February 2011. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
F2855–11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2855 – 11
(CPVC) Compounds 3.2.3 nominal tubing size (NTS), n—A non-dimensional
D1898 Practice for Sampling of Plastics tubing sizing convention based on copper tubing sizing, CTS,
D2122 Test Method for Determining Dimensions of Ther- dimensionsinwhichthenominalmeasuredODistheNTSsize
moplastic Pipe and Fittings plus 0.125 in. For example, NTS ⁄2 tubing has a nominal OD
D2837 TestMethodforObtainingHydrostaticDesignBasis of 0.625 in.
for Thermoplastic Pipe Materials or Pressure Design Basis
4. Classification
for Thermoplastic Pipe Products
4.1 Tubing—This specification classifies CPVC-AL-CPVC
D2846/D2846M Specification for Chlorinated Poly(Vinyl
composite tubing and CPVC bushings by a maximum continu-
Chloride) (CPVC) Plastic Hot- and Cold-Water Distribu-
ous operating condition of 100 psi (690 kPa) at 180°F (82°C)
tion Systems
1 3
and by nominal tubing sizes of ⁄2 NTS , ⁄4 NTS and 1 NTS.
D3167 Test Method for Floating Roller Peel Resistance of
4.2 Pressure Design Basis The CPVC-AL-CPVC compos-
Adhesives
ite tubing shall have an established pressure design basis at
E8/E8M Test Methods for Tension Testing of Metallic
73°F (23°C) of 800 psi (5.52 MPa) or greater and at 180°F
Materials
(82°C) of 200 psi (1.38 MPa) or greater in accordance with
F412 Terminology Relating to Plastic Piping Systems
F1281 Specification for Crosslinked Polyethylene/ Test Method D2837.
Aluminum/Crosslinked Polyethylene (PEX-AL-PEX)
5. Materials
Pressure Pipe
5.1 General—The CPVC-AL-CPVC composite tubing is
2.2 Federal Standards:
composed of an internal CPVC layer, adhesive layer, alumi-
Fed. Std. No. 123 Marking for Shipments (Civil Agencies)
num layer, adhesive layer and external CPVC layer. For tubing
2.3 Military Standards:
made to this specification, the constituent materials must meet
MIL-STD-129 Marking for Shipment and Storage
the following requirements:
2.4 NSF Standards:
5.2 Aluminum—The thickness of the aluminum layer shall
Standard No. 14 for Plastic Piping Components and Related
meetthedimensionsandtolerancegiveninTable1.Thetensile
Materials
propertiesofthealuminummaterialshallbeaminimumtensile
Standard No. 61 for Drinking Water Systems
strength of 14,600 psi (100 MPa) and an elongation of 20%
Components—Health Effects
when tested in accordance with Test Method E8/E8M.
3. Terminology
5.3 Adhesive—The adhesive that bonds the CPVC layers to
the Aluminum layer shall be of sufficient strength that no
3.1 Definitions:
debonding of the layers occurs when the CPVC-AL-CPVC
3.1.1 General—Definitions used in this specification are in
composite tubing is tested to all the requirements in Section 6
accordance with Terminology F412 and abbreviations are in
of this standard and to the requirements for Hydrostatic Burst
accordance with Terminology D1600, unless otherwise speci-
Strength and CPVC Adhesives as specified in Specification
fied. The abbreviation for Aluminum is AL.
D2846/D2846M.
3.2 Definitions of Terms Specific to This Standard:
5.4 CPVC—The CPVC compound used to make the inner
3.2.1 CPVC-AL-CPVC composite tubing, n—composite
and outer layers shall meet the requirements specified in 5.4.1
tubing produced by coextrusion or extrusion of layers of
and 5.4.2.
CPVC/Aluminum/CPVC bonded together with a melt adhe-
5.4.1 Short-Term Properties— The CPVC compound shall
sive. This construction is also known as “multilayer”.
meet the requirements of cell classification CPVC 23447 as
3.2.2 tubing, n—,For the purpose of this specification, pipe
specified in Specification D1784.
made the specific dimensions shown in Table 1.
5.4.2 Long-Term Hydrostatic Strength—The CPVC com-
pound shall have an established 180°F (82°C) hydrostatic
design stress of 500 psi (3.45 MPa) or greater in accordance
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
with Test Method D2837.
dodssp.daps.dla.mil.
5.5 Rework Material— Rework material generated from
Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd.,Ann
CPVC-AL-CPVC composite tubing shall not be used.
Arbor, MI 48113-0140, http://www.nsf.org.
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 Layer Outer CPVC Layer
NTS
Tolerance on Tolerance on
Average Average
Average Tolerance on Minimum Minimum
Average Average
Average
⁄2 0.625 60.003 0.448 60.003 0.017 60.002 0.025 0.025
(15.88) (0.08) (11.38) (0.08) (0.43) (0.05) (0.64) (0.64)
⁄4 0.875 60.003 0.691 60.004 0.017 60.002 0.028 0.028
(22.23) (0.08) (17.55) (0.10) (0.43) (0.05) (0.71) (0.71)
1 1.125 60.003 0.932 60.005 0.017 60.002 0.034 0.034
(28.58) (0.08) (23.67) (0.13) (0.43) (0.05) (0.86) (0.86)
F2855 – 11
TABLE 3 Minimum Tube Strength – N (lb)
6. Requirements
⁄2 NTS 2300 (515)
6.1 General—The requirements and test methods in this
⁄4 NTS 2500 (560)
specification cover CPVC-AL-CPVC composite tubing. Tests
1 NTS 2500 (560)
ontheindividuallayersthatcomprisethiscompositetubingare
outside the scope of this specification. The raw materials used,
however, must conform to the requirements as set out in TABLE 4 Minimum Hydrostatic Sustained Pressure
Requirements for CPVC-AL-CPVC Tubing Assemblies Tested in
Section 5.
Either Water or Air Bath External Environment at 180°F (82°C)
6.2 Dimensions and Tolerance of Tubing:
Hydrostatic Test Pressure
6.2.1 Tubing Diameter— The minimum outside diameter Test Test
Condition Duration
Water Bath Air Bath
and tolerances of the tubing shall meet the requirements given
in Table 1, when measured in accordance Test Method D2122.
A 6 min 521 psi (3 590 kPa) 551 psi (3 800 kPa)
B 4 h 364 psi (2 510 kPa) 403 psi (2 780 kPa)
Maximum and minimum (out-of-roundness) tolerances apply
only to measurements made on tubing prior to coiling.
6.2.2 Tubing Wall Thickness:
6.2.2.1 Overall Tubing Wall Thickness—The overall tube
7. Requirements for Joints made with Solvent Cement
wall thickness shall meet the requirements given in Table 1,
7.1 CPVC-AL-CPVC joints made with solvent cement shall
when measured in accordance with Test Method D2122. The
meet the Requirements for Solvent Cement and Adhesive
minimum wall thickness at any point of measurement of the
Joints of Specification D2846/D2846M as specified for:
tube shall not be less than the value specified in Table 1.
7.1.1 Hydrostatic Burst Strength
6.2.2.2 CPVC Layer Wall Thickness—The minimum wall
7.1.1.1 The specimen size for the Hydrostatic Burst
thickness at any point of measurement of the tube shall not be
Strength shall be 1 NTS.
less than the value specified in Table 1.
7.1.2 Hydrostatic Sustained Pressure Strength
7.1.3 Thermocycling
NOTE 5—An optical comparator has been found to be an excellent
method for measuring the wall thickness of the various layers in piping.A
7.2 Special requirements for joining CPVC-AL-CPVC tub-
ring is cut from the tubing and placed on the optical comparator for
ing are contained in mandatory Annex A1.
measurement determination.
8. Workmanship, Finish and Appearance
6.2.3 Tubing Length—Thetubingshallbesuppliedcoiledor
in straight lengths as agreed upon with the purchaser and with
8.1 Workmanship—The composite tubing and associated
anallowabletoleranceof+1/-0ft(+305/-0mm)forcoilsand 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
6.3 Delamination—CPVC-AL-CPVC tubing shall not show and associated bushings shall be as uniform as commercially
any separation of the CPVC layer from either side of the
practicable in color, opacity, density, and other physical prop-
aluminum layer when tested in accordance with 9.2. erties.
6.4 Ring Peel Strength—The adhesive test of the CPVC
9. Test Methods for Tubing
layer to the aluminum is carried out by a ring peel strength test.
The adhesive strength when bonding CPVC toAluminum shall
9.1 Sampling—Asufficient quantity of composite tubing, as
meet the specification given in Table 2 when tested in accor-
agreed upon between the purchaser and the seller, shall be
dance with Test Method D3167.
selected from each lot or shipment and tested to determine
6.5 Apparent Tensile Strength of Tubing—The tube rings,
conformance with this specification (see Practice D1898). In
when tested in accordance with the Ring Test Method of Test
thecaseofnoprioragreement,randomsamplesselectedbythe
Method F1281, shall meet the minimum strength as specified
testing laboratory shall be deemed adequate.
in Table 3.
9.1.1 Test Specimens—Not less than 50 % of the test
6.6 Hydrostatic Sustained Pressure—CPVC-AL-CPVC
specimens required for any pressure test shall have at least a
tubing shall meet the minimum hydrostatic sustained pressure
part of the marking in their central sections.The central section
requirements of both test conditions shown in Table 4 when
is that portion of tubing which is at least one tubing diameter
tested in accordance with the Hydrostatic Sustained Pressure
away from an end closure.
Method of Specification D2846/D2846M.
9.2 Delamination Test—Cut two ⁄2 to 1 in. rings from the
6.7 Requirements for the, installation required, CPVC bush-
tubing to be tested. Using a band saw, slice each ring
ings are in mandatory Annex A1.
lengthwise into two approximately equal semicircular, arc-
shaped specimens. The Slice on the second ring shall be at 90°
from the slice on the first ring so that each of the four
TABLE 2 Minimum Ring Peel Strength-Average Value for Inner
specimens represents one quadrant of the circumference of the
and Outer CPVC Layers lbs/in. (N/mm)
pipe. One specimen must have the print line at the center of the
NTS 23°C 60°C 82°C
arc. With pliers grasp the opposing ends of arc and bend back
(73.4°F) (140°F) (180°F)
the edges s
...
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