ASTM F1734-19
(Practice)Standard Practice for Qualification of a Combination of Squeeze Tool, Pipe, and Squeeze-Off Procedures to Avoid Long-Term Damage in Polyethylene (PE) Gas Pipe
Standard Practice for Qualification of a Combination of Squeeze Tool, Pipe, and Squeeze-Off Procedures to Avoid Long-Term Damage in Polyethylene (PE) Gas Pipe
SIGNIFICANCE AND USE
5.1 Squeeze-off is widely used to temporarily control the flow of gas in PE pipe. Squeeze tools vary depending on the size of the pipe and the design of the tool. Squeeze-off procedures vary depending on the tool design, pipe material, and environmental conditions.
5.2 Experience indicates that some combinations of polyethylene material, temperature, tool design, wall compression percentage and procedure can cause damage leading to failure.
5.3 Studies of polyethylene pipe extruded in the late 1980s and thereafter show that damage typically does not develop when the wall compression percentage is 30 % or less, when temperatures are above 50 °F (10 °C), and when closure and release rates are typical of field conditions for screw-driven tools.4 With tools meeting Specification F1563, acceptable flow control at typical gas service pressures is achieved at wall compression percentages between 10 and 20 % for pipe diameters less than 6 in.4,5 Because damage does not develop in these materials at such squeeze levels, the references cited indicate that squeeze-off flow control practices using tools meeting Specification F1563 and qualified procedures meeting Practice F1041 are effective for smaller pipe sizes.4 ,5
Note 3: Specification F1563 provides a procedure for evaluating tool flow control performance.
5.4 This practice provides a method to qualify a combination of squeeze tool, pipe size and material, and squeeze-off procedure to ensure that long-term damage does not occur. This practice is useful for polyethylene gas pipe manufactured before 1975, for new or revised polyolefin gas pipe materials, for pipe diameters of 8 in. or above, for new or revised squeeze tool designs, and for new or revised squeeze-off procedures.
SCOPE
1.1 This practice covers qualifying a combination of a squeeze tool, a polyethylene gas pipe, and a squeeze-off procedure to avoid long-term damage in polyethylene gas pipe. Qualifying is conducted by examining the inside and outside surfaces of pipe specimens at and near the squeeze to determine the existence of features indicative of long-term damage. If indicative features are absent, sustained pressure testing in accordance with Specification D2513 is conducted to confirm the viability of the squeeze-off process. For assistance with specimen examination, an Adjunct, ADJF17342, is available from ASTM.
1.2 This practice is appropriate for any combination of squeeze tool, PE gas pipe and squeeze-off procedure, and is particularly appropriate for pre-1975 Polyethylene (PE) pipe, and for pipe sizes of 8 in. or above, because of a greater possibility of long-term damage.
1.3 This practice is for use by squeeze-tool manufacturers, pipe manufacturers and gas utilities to qualify squeeze tools made in accordance with Specification F1563; and squeeze-off procedures in accordance with Guide F1041 with pipe manufactured in accordance with Specification D2513.
1.4 Governing codes and project specifications should be consulted. Nothing in this practice should be construed as recommending practices or systems at variance with governing codes and project specifications.
1.5 Where applicable in this guide, “pipe” shall mean “pipe and tubing.”
1.6 Units—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.
1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of Internat...
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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: F1734 −19 An American National Standard
Standard Practice for
Qualification of a Combination of Squeeze Tool, Pipe, and
Squeeze-Off Procedures to Avoid Long-Term Damage in
1
Polyethylene (PE) Gas Pipe
This standard is issued under the fixed designation F1734; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This practice covers qualifying a combination of a
responsibility of the user of this standard to establish appro-
squeeze tool, a polyethylene gas pipe, and a squeeze-off
priate safety, health, and environmental practices and deter-
proceduretoavoidlong-termdamageinpolyethylenegaspipe.
mine the applicability of regulatory limitations prior to use.
Qualifying is conducted by examining the inside and outside
1.8 This international standard was developed in accor-
surfaces of pipe specimens at and near the squeeze to deter-
dance with internationally recognized principles on standard-
mine the existence of features indicative of long-term damage.
ization established in the Decision on Principles for the
If indicative features are absent, sustained pressure testing in
Development of International Standards, Guides and Recom-
accordance with Specification D2513 is conducted to confirm
mendations issued by the World Trade Organization Technical
the viability of the squeeze-off process. For assistance with
2
Barriers to Trade (TBT) Committee.
specimen examination, an Adjunct, ADJF1734 , is available
from ASTM.
2. Referenced Documents
1.2 This practice is appropriate for any combination of 3
2.1 ASTM Standards:
squeeze tool, PE gas pipe and squeeze-off procedure, and is
D2513Specification for Polyethylene (PE) Gas Pressure
particularly appropriate for pre-1975 Polyethylene (PE) pipe,
Pipe, Tubing, and Fittings
and for pipe sizes of 8 in. or above, because of a greater
D3350Specification for Polyethylene Plastics Pipe and Fit-
possibility of long-term damage.
tings Materials
1.3 This practice is for use by squeeze-tool manufacturers,
F1041Guide for Squeeze-Off of Polyolefin Gas Pressure
pipe manufacturers and gas utilities to qualify squeeze tools
Pipe and Tubing
made in accordance with Specification F1563; and squeeze-off
F1563Specification for Tools to Squeeze-off Polyethylene
procedures in accordance with Guide F1041 with pipe manu-
(PE) Gas Pipe or Tubing
factured in accordance with Specification D2513.
2.2 ASTM Adjuncts:
2
Interpretation Aid for Squeeze-Off Damage
1.4 Governing codes and project specifications should be
consulted. Nothing in this practice should be construed as
3. Terminology
recommendingpracticesorsystemsatvariancewithgoverning
3.1 Definitions:
codes and project specifications.
3.1.1 squeeze-off, n—a technique used to temporarily con-
1.5 Where applicable in this guide, “pipe” shall mean “pipe
trol the flow of gas in a polyethylene gas pipe by flattening the
and tubing.”
pipe with a mechanical or hydraulic device.
1.6 Units—The values stated in inch-pound units are to be
3.1.2 squeeze process, n—the combination of the squeeze
regarded as standard. The values given in parentheses are
tool, the pipe being squeezed, and the squeeze-off procedure
mathematical conversions to SI units that are provided for
being used.
information only and are not considered standard.
3.1.3 wall compression (WC), n—the percentage extent to
which the pipe walls are compressed when the pipe is
1
This practice is under the jurisdiction of ASTM Committee F17 on Plastic
squeezed. (See Fig. 1.) It is defined as:
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved Jan. 1, 2019. Published February 2019. Originally
approved in 1996. Last previous edition approved in 2009 as F1734–03(2009)
3
which was withdrawn April 2018 and reinstated in January 2019. DOI: 10.1520/ For referenced ASTM standards, visit the ASTM website, www.astm.org, or
F1734-19. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Available from ASTM International Headquarters. Order Adjunct No. Standards volume information, refer to the standard’s Document Summary page on
ADJF1734. Original adjunct produced in 1995. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 -----------
...
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: F1734 − 19 An American National Standard
Standard Practice for
Qualification of a Combination of Squeeze Tool, Pipe, and
Squeeze-Off Procedures to Avoid Long-Term Damage in
1
Polyethylene (PE) Gas Pipe
This standard is issued under the fixed designation F1734; 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 1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This practice covers qualifying a combination of a
responsibility of the user of this standard to establish appro-
squeeze tool, a polyethylene gas pipe, and a squeeze-off
priate safety, health, and environmental practices and deter-
procedure to avoid long-term damage in polyethylene gas pipe.
mine the applicability of regulatory limitations prior to use.
Qualifying is conducted by examining the inside and outside
1.8 This international standard was developed in accor-
surfaces of pipe specimens at and near the squeeze to deter-
dance with internationally recognized principles on standard-
mine the existence of features indicative of long-term damage.
ization established in the Decision on Principles for the
If indicative features are absent, sustained pressure testing in
Development of International Standards, Guides and Recom-
accordance with Specification D2513 is conducted to confirm
mendations issued by the World Trade Organization Technical
the viability of the squeeze-off process. For assistance with
2 Barriers to Trade (TBT) Committee.
specimen examination, an Adjunct, ADJF1734 , is available
from ASTM.
2. Referenced Documents
1.2 This practice is appropriate for any combination of 3
2.1 ASTM Standards:
squeeze tool, PE gas pipe and squeeze-off procedure, and is
D2513 Specification for Polyethylene (PE) Gas Pressure
particularly appropriate for pre-1975 Polyethylene (PE) pipe,
Pipe, Tubing, and Fittings
and for pipe sizes of 8 in. or above, because of a greater
D3350 Specification for Polyethylene Plastics Pipe and Fit-
possibility of long-term damage.
tings Materials
1.3 This practice is for use by squeeze-tool manufacturers, F1041 Guide for Squeeze-Off of Polyolefin Gas Pressure
pipe manufacturers and gas utilities to qualify squeeze tools
Pipe and Tubing
made in accordance with Specification F1563; and squeeze-off
F1563 Specification for Tools to Squeeze-off Polyethylene
procedures in accordance with Guide F1041 with pipe manu-
(PE) Gas Pipe or Tubing
factured in accordance with Specification D2513.
2.2 ASTM Adjuncts:
2
Interpretation Aid for Squeeze-Off Damage
1.4 Governing codes and project specifications should be
consulted. Nothing in this practice should be construed as
3. Terminology
recommending practices or systems at variance with governing
3.1 Definitions:
codes and project specifications.
3.1.1 squeeze-off, n—a technique used to temporarily con-
1.5 Where applicable in this guide, “pipe” shall mean “pipe
trol the flow of gas in a polyethylene gas pipe by flattening the
and tubing.”
pipe with a mechanical or hydraulic device.
1.6 Units—The values stated in inch-pound units are to be
3.1.2 squeeze process, n—the combination of the squeeze
regarded as standard. The values given in parentheses are
tool, the pipe being squeezed, and the squeeze-off procedure
mathematical conversions to SI units that are provided for
being used.
information only and are not considered standard.
3.1.3 wall compression (WC), n—the percentage extent to
which the pipe walls are compressed when the pipe is
1
This practice is under the jurisdiction of ASTM Committee F17 on Plastic
squeezed. (See Fig. 1.) It is defined as:
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved Jan. 1, 2019. Published February 2019. Originally
approved in 1996. Last previous edition approved in 2009 as F1734 – 03(2009)
3
which was withdrawn April 2018 and reinstated in January 2019. DOI: 10.1520/ For referenced ASTM standards, visit the ASTM website, www.astm.org, or
F1734-19. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Available from ASTM International Headquarters. Order Adjunct No. Standards volume information, refer to the standard’s Document Summary page on
ADJF1734. Original adjunct produced in 1995. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F1734 − 19
3 4,5
tests, a flow of 0.1 ft /h was considered equivalent to stopping the flow.
4.2 The squ
...
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