ASTM D2666-96a

Standard Specification for Polybutylene (PB) Plastic Tubing (Withdrawn 2005)

SCOPE
1.1 This specification covers polybutylene (PB) tubing that is outside diameter controlled, made in standard thermoplastic tubing dimension ratios and pressure rated for water (see appendix). Included are criteria for classifying PB plastic tubing; a system of nomenclature for PB plastic tubing; and requirements and test methods for materials, workmanship, dimensions, sustained pressure, and burst pressure. Methods of marking are also given.  
1.2 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
1.4 The following safety hazards caveat pertains only to the test methods portion, Section 7, 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.
WITHDRAWN RATIONALE
This specification covers polybutylene (PB) tubing that is outside diameter controlled, made in standard thermoplastic tubing dimension ratios and pressure rated for water (see Appendix). Included are criteria for classifying PB plastic tubing; a system of nomenclature for PB plastic tubing; and requirements and test methods for materials, workmanship, dimensions, sustained pressure, and burst pressure. Methods of marking are also given.
Formerly under the jurisdiction of Committee F17 on Plastic Piping Systems, this specification was withdrawn without replacement in August of 2005 in accordance with section 10.6.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1995
• Withdrawal Date: 22-Aug-2005
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.26 - Olefin Based Pipe

Relations

• Referred By: ASTM F412-23 - Standard Terminology Relating to Plastic Piping Systems
• Effective Date: 01-Jan-1996

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
An American National Standard
Designation: D 2666 – 96a
Standard Specification for
Polybutylene (PB) Plastic Tubing
This standard is issued under the fixed designation D 2666; 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 moplastic Pipe and Fittings
D 2581 Specification for Polybutylene (PB) Plastics Mold-
1.1 This specification covers polybutylene (PB) tubing that
ing and Extrusion Materials
is outside diameter controlled, made in standard thermoplastic
D 2837 Test Method for Obtaining Hydrostatic Design
tubing dimension ratios and pressure rated for water (see
Basis for Thermoplastic Pipe Materials
Appendix). Included are criteria for classifying PB plastic
F 412 Terminology Relating to Plastic Piping Systems
tubing; a system of nomenclature for PB plastic tubing; and
F 699 Practice for Accelerated Conditioning of Polybuty-
requirements and test methods for materials, workmanship,
lene Pipe and Tubing for Subsequent Quality Control
dimensions, sustained pressure, and burst pressure. Methods of
Testing
marking are also given.
2.2 Federal Standard:
1.2 The text of this specification references notes, footnotes,
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
and appendixes which provide explanatory material. These
2.3 Military Standard:
notesandfootnotes(excludingthoseintablesandfigures)shall
MIL-STD-129 Marking for Shipment and Storage
not be considered as requirements of the specification.
2.4 NSF Standards:
1.3 The values stated in inch-pound units are to be regarded
Standard No. 14 for Plastic Piping Components and Related
as the standard. The values given in parentheses are provided
Materials
for information purposes only.
Standard No. 61 for Drinking Water System Components—
1.4 The following safety hazards caveat pertains only to
Health Effects
the test methods portion, Section 7, of this specification: This
standard does not purport to address all of the safety concerns,
3. Terminology
if any, associated with its use. It is the responsibility of the user
3.1 Definitions—Definitions are in accordance with Termi-
of this standard to establish appropriate safety and health
nology F 412, and abbreviations are in accordance with Ter-
practices and determine the applicability of regulatory limita-
minologyD 1600,unlessotherwisespecified.Theabbreviation
tions prior to use.
for polybutylene plastic is PB.
2. Referenced Documents 3.2 Definitions of Terms Specific to This Standard:
3.2.1 hydrostatic design stress—the estimated maximum
2.1 ASTM Standards:
tensile stress the material is capable of withstanding continu-
D 618 Practice for Conditioning Plastics for Testing
ously with a high degree of certainty that failure of the pipe
D 1598 Test Method for Time-to-Failure of Plastic Pipe
will not occur. This stress is circumferential when internal
Under Constant Internal Pressure
hydrostatic water pressure is applied.
D 1599 TestMethodforShort-TimeHydraulicFailurePres-
3.2.2 relation between dimensions, hydrostatic design
sure of Plastic Pipe, Tubing, and Fittings
stress, and pressure rating—the following expression, com-
D 1600 Terminology for Abbreviated Terms Relating to
monly known as the ISO equation, is used in this specification
Plastics
2 to relate dimensions, hydrostatic design stress, and pressure
D 1603 Test Method for Carbon Black in Olefin Plastics
rating:
D 1708 Test Method for Tensile Properties of Plastics by
Use of Microtensile Specimens 2S/P5~D /t!2 1 (1)
D 2122 Test Method for Determining Dimensions of Ther-
1 4
ThisspecificationisunderthejurisdictionofASTMCommitteeF-17onPlastic Annual Book of ASTM Standards, Vol 08.02.
Piping Systems and is the direct responsibility of Subcommittee F17.26 on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Olefin-Based Pipe. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Current edition approved Sept. 10, 1996. Published November 1996. Originally Available from the National Sanitation Foundation, P.O. Box 1468,AnnArbor,
published as D 2666 – 67 T. Last previous edition D 2666 – 96. MI 48106.
2 7
Annual Book of ASTM Standards, Vol 08.01. ISOR161-1960,PipesofPlasticsMaterialsfortheTransportofFluids(Outside
Annual Book of ASTM Standards, Vol 08.04. Diameters and Nominal Pressures) Part 1, Metric Series.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 2666 – 96a
or other defects. The tubing shall be as uniform as commer-
where:
cially practicable in color, opacity, density and other physical
S = hydrostatic design stress, MPa (or psi),
properties.
P = pressure rating, MPa (or psi),
D = average outside diameter, mm (or in.), and 6.2 Dimensions and Tolerances:
t = minimum wall thickness, mm (or in.).
6.2.1 Outside Diameters—The outside diameters and toler-
3.2.3 standard dimension ratio (SDR)—the ratio of outside
ances shall be as shown in Table 1 when measured in
diameter to wall thickness. For PB tubing, it is calculated by
accordance with 7.4 and 7.4.1.
dividing the average outside diameter of the tubing in milli-
6.2.2 Wall Thickness—The wall thicknesses and tolerances
metres or in inches by the minimum wall thickness in milli-
shall be as shown in Table 2 when measured in accordance
metres or inches. If the wall thickness calculated by this
with 7.4 and 7.4.2.
formula is less than 0.062 in. (1.57 mm), it shall be arbitrarily
6.2.3 WallThicknessRange—Thewallthicknessrangeshall
increased to 0.062 in. The SDR values shall be rounded to the
be within 12 % when measured in accordance with 7.4 and
nearest 0.5.
7.4.2.
3.2.4 standard thermoplastic tubing materials designation
6.3 Carbon Black—The polybutylene tubing extrusion
code—the tubing materials designation code shall consist of
compound Type II, Grade 1, Class C, shall contain at least 2 %
the abbreviation PB for the type of plastic, followed by the carbon black when tested in accordance with 7.5.
ASTM type and grade in Arabic numerals and the hydrostatic
6.4 Sustained Pressure—The tubing shall not fail, balloon,
design stress in units of 100 psi with any decimal figures burst, or weep as defined in Test Method 1598, at the test
dropped.Wherethehydrostaticdesignstresscodecontainsless
pressures given in Table 3 when tested in accordance with 7.6.
than two figures, a cipher shall be used before the number; thus 6.5 Burst Pressure—The minimum burst pressure for PB
a complete material code shall consist of two letters and four
plastic tubing shall be as given in Table 4, when determined in
figures for PB plastic tubing materials (see Section 5). accordance with 7.7.
3.2.5 tubing pressure rating (PR)—theestimatedmaximum
6.6 Elongation Value at Break—The minimum pipe
pressure that water in the tubing can exert continuously with a machine-direction elongation value at break shall exceed or
high degree of certainty that failure of the tube will not occur.
equal an average of 125 % when samples are tested in
accordance with 7.8.
4. Tubing Classification
7. Test Methods
4.1 General—This specification covers PB tubing in two
7.1 Conditioning—Because of the crystalline transforma-
standard dimension ratios, namely, 9 and 13.5. These are
tion which takes place after polybutylene resins are cooled
referred to as SDR9 and SDR13.5.
from the melt, it is necessary to delay physical testing until 10
daysafterextrusion.Duringthis10-dayperiod,storethetubing
5. Materials
at temperatures between 40 and 100°F.Take the test specimens
5.1 General—Polybutylene plastics used to make tubing
after 8 days and condition at 73.4 6 3.6°F (23 6 2°C) and 50
meeting the requirements of this specification are categorized
6 5 % relative humidity for not less than 40 h prior to test in
by means of two criteria, namely, (1) short-term strength tests,
accordance with ProcedureAof Practice D 618, for those tests
and (2) long-term strength tests. Since the maximum physical
where conditioning is required. In cases of disagreement, the
properties of the tubing are not developed until 10 days after
tolerances shall be 61.8°F (1°C) and 62 % relative humidity.
extrusion, burst testing must be delayed for this period.
5.2 Basic Materials—This specification covers PB tubing
TABLE 1 Outside Diameters and Tolerances for PB Tubing
madefromPBplasticinaccordancewithSpecificationD 2581.
5.3 Hydrostatic Design Stresses—This specification covers
Nominal Tubing Average Outside
PB tubing made from PB plastics as defined by hydrostatic Tolerances
Size Diameter
design stress developed on the basis of long-term tests (Ap-
For Maximum and
For Average
pendix). A
Minimum Diameter
Diameter
(mm) in. (mm) in.
(Out-of-Roundness)
NOTE 1—Information regarding the method of test and other criteria
(mm) in. (mm) in.
used in assigning this hydrostatic design stress may be obtained from the
(13) ⁄2 (15.9) 0.625 (+0.20 +0.008 (60.38) 60.015
Plastic Pipe Institute.
−0.00) −0.000
5.4 Compound—The PB plastic extrusion compound shall
(16) ⁄8 (19.1) 0.750 (+0.20 +0.008 (60.38) 60.015
−0.00) −0.000
meet the requirements of Type II, Grade 1, Class B with
(19) ⁄4 (22.2) 0.875 (+0.20 +0.008 (60.38) 60.015
antioxidant, or Class C in accordance with Specification
−0.00) −0.000
D 2581.
(25) 1 (28.6) 1.125 (+0.25 +0.010 (60.38) 60.015
−0.00) −0.000
5.5 Rework Material—The manufacturers shall use only
(32) 1 ⁄4 (34.9) 1.375 (+0.25 +0.010 (60.38) 60.015
their own clean rework pipe material and the pipe produced
−0.00) −0.000
shall meet all the requirements of this specification. (38) 1 ⁄2 (41.3) 1.625 (+0.30 +0.012 (60.38) 60.015
−0.00) −0.000
(51) 2 (54.0) 2.125 (+0.30 +0.012 (60.38) 60.015
6. Requirements
−0.00) −0.000
6.1 Workmanship—The tubing shall be homogeneous A
Themaximumandminimumdiameter(out-of-roundness)tolerancesapplyonly
throughout and free of visible cracks, holes, foreign inclusions, to tubing before coiling.
D 2666 – 96a
TABLE 2 Wall Thicknesses and Tolerances for SDR-PR PB Plastic Tubing
A
Wall Thickness
SDR13.5 SDR9
Nominal Tubing Size
Minimum Tolerance Minimum Tolerance
(mm) in. (mm) in. (mm) in. (mm) in. (mm) in.
(13) ⁄2 (1.57) 0.062 (+0.25) +0.010 (1.75) 0.069 (+0.25) +0.010
(16) ⁄8 (1.57) 0.062 (+0.25) +0.010 (2.13) 0.083 (+0.25) +0.010
(19) ⁄4 (1.65) 0.065 (+0.25) +0.010 (2.46) 0.097 (+0.25) +0.010
(25) 1 (2.13) 0.083 (+0.25) +0.010 (3.18) 0.125 (+0.30) +0.012
(32) 1 ⁄4 (2.59) 0.102 (+0.25) +0.010 (3.89) 0.153 (+0.38) +0.015
(38) 1 ⁄2 (3.05) 0.120 (+0.30) +0.012 (4.60) 0.181 (+0.46) +0.018
(51) 2 (4.01) 0.157 (+0.38) +0.015 (5.99) 0.236 (+0.61) +0.024
A
Theminimumisthelowestwallthicknessofthetubingatanycrosssection.Themaximumpermittedwallthickness,atanycrosssection,istheminimumwallthickness
plus the stated tolerance. All tolerances are on the plus side of the minimum requirement.
TABLE 3 Sustained Water Pressure Test Conditions for SDR-PR
7.4.1 Outside Diameter—Measure the outside diameter of
PB Plastic Tubing
the tubing in accordance with Test Method D 2122. The
average outside diameter is the arithmetic average of the
Pressure Required for Test,
Nominal Tubing Size
A maximum and minimum diameter at any cross section. The
Standard
psi (MPa)
Dimension
toleranceforout-of-roundnessshallapplyonlytotubingbefore
at 73.4°F at 100°F
Ratio
in. (mm)
shipment.
(23°C) (37.8°C)
9 all sizes (all sizes) 475 (3.3) (3.1) 450 7.4.2 Wall Thickness—Make micrometer measurements of
13.5 ⁄2 (13) 440 (3.1) (2.7) 395
the wall thickness in accordance with Test Method D 2122 to
13.5 ⁄8 (16) 360 (2.5) (2.2) 325
determine the maximum and minimum values. Measure the
13.5 ⁄4 and larger (19 and 310 (2.1) (2.0) 290
larger) wallthicknessatbothendsofthetubingtothenearest0.001in.
A
(0.025 mm).
The fiber stress used to derive these pressures for PB2110 at 3°F (23°C) is
2000 psi (13.8 MPa).
7.5 Carbon Black—Determineinduplicatethecarbonblack
B
The fiber stress used to derive these pressures for PB2110 at 100°F (37.3°C) is
content of the tubing in accordance with Test Method D 1603.
1800 psi (12.4 MPa).
7.6 Sustained Pressure Test—Select the test specimens at
random. Test individually with water at two controlled tem-
TABLE 4 Burst Pressure Requirements for Water at 73.4°F
peratures under the pressures given in Table 3, twelve speci-
(23°C) for PB Plastic Tubing
mens of tubing, each specimen at least ten times the nominal
diameter in length, but not less than 10 in. (25.4 cm) or more
Standard Minimum Burst
Nominal Tubing Size
than 3 ft (91.4 cm) between end closures and containing the
Dimension Pressures,
A
in. (mm)
Ratio psi (MPa)
permanent marking on the pipe. Test six specimens at each
9 all sizes (all sizes) 550 (3.80)
temperature. Condition the specimens for at least1hto within
13.5 ⁄2 (13) 480 (3.31)
3.6°F (62°C) of the specified test temperatures. Maintain the
13.5 ⁄8 (16) 395 (2.73)
3 specimens at the pressures indicated for the appropriate tem-
13.5 ⁄4 and larger (19 and larger) 350 (2.41)
peratures for a period of 1000 h. Hold the pressure as closely
A
The fiber stress used to derive this test pressure is 2200 psi (15.17 MPa).
as possible, but within 610 psi (60.07 MPa). Maintain the test
temperatureswithin 63.6°F(2°C)ofthespecifiedtemperature.
Test in accordance with Test Method D 1598, except maintain
7.2 Test Conditions—Conduct the test in the standard labo-
the pressure at the values given in Table 3 for 1000 h. Failure
ratory atmosphere of 73.4 6 3.6°F (23 6 2°C) and 50 65%
of two of the six specimens tested at either temperature
relative humidity, unless otherwise specified in the test method
constitutes failure in the test. Failure of one of six specimens
or in this specification. In cases of disagreement, the tolerances
tested at either temperature is cause for retest of six additional
shall be 61.8°F (1°C) and 62 % relative humidity.
specimens at that temperature. Failure of one of six specimens
7.3 Sampling—The selection of the sample or samples of
tested at either temperature in retest constitutes failure in the
tubing shall be as agreed upon between the purchaser and the
test. Failure of the tubing shall be defined as in Test Method
seller. In case of no prior agreement, any sample selected by
D 1598, namely:
the testing laboratory shall be deemed adequate.
7.6.1 Failure—Any continuous loss of pressure resulting
7.3.1 Test Specimens—Not less than 50 % of the test speci-
from the transmission of the test liquid through the body of the
mens required for any pressure test shall have at least a part of
specimen under test.
the
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