ASTM F1025-94(2011)
(Guide)Standard Guide for Selection and Use of Full-Encirclement-Type Band Clamps for Reinforcement or Repair of Punctures or Holes in Polyethylene Gas Pressure Pipe
Standard Guide for Selection and Use of Full-Encirclement-Type Band Clamps for Reinforcement or Repair of Punctures or Holes in Polyethylene Gas Pressure Pipe
SIGNIFICANCE AND USE
Full-encirclement-type band clamps are recommended for repairs only where the pipe is able to maintain its structural integrity. These clamps are not recommended for permanent repair of pipe where the damage could propagate outside the clamp under anticipated field conditions (see 5.1.1 for repair limitations). In such situations, cut out and replace the damaged pipe with a new piece.
These clamps may be used to cover holes left in the pipe from abandoned service line connections, purge points, and accidental punctures.
These clamps may be used to reinforce the pipe where the wall thickness has been reduced because of gouges or other irregularities.
Some users reinforce polyethylene pipe after it has been squeezed-off as a precaution against pipe damage that may have occurred during the squeeze-off process and as a means of ensuring that the pipe will not be squeezed-off again at the same location. Consult with the polyethylene pipe manufacturer as to the appropriateness of squeeze-off for their product, and for circumstances when reinforcement is recommended. See Guide F 1041.
SCOPE
1.1 This guide specifically addresses the design and installation of full-encirclement-type band clamps for repair of gouges, punctures, or holes, and for reinforcement of polyethylene plastic pipe. Guidelines are provided for selecting and using clamps in pipe sizes 2 in. nominal (60 mm) and larger.
1.1.1 A test method is also provided for the user to assess the applicability of the repair clamp. Under appropriate circumstances, this type of clamp offers a convenient, effective, and safe means of restoring the integrity of an in-service pipeline, without cutting out a section of pipe (see Note 0). The pipe to be repaired cannot be backed by a stiffener for internal support and cross-sectional dimensional control. Satisfactory use of this type of clamp must rely on the crush resistance of the pipe itself and a fitting design concept, which retains the cross-sectional pipe configuration while minimizing compressive forces required to obtain an effective leakage seal. Note 0The appropriateness for use of this type of clamp should be determined by using the information contained in this guide and from consultation with, and recommendations of, both the pipe and clamp manufacturers. The basic premise for use of this type of clamp is that it is recommended by the manufacturer for this specific application and that step-by-step installation instructions are available for that application. It is important in the development of this type of clamp that prototype testing be conducted to evaluate performance expectations because of the physical limitations encountered when designing it for use with plastic pipe.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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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Designation: F1025 − 94 (Reapproved 2011) An American National Standard
Standard Guide for
Selection and Use of Full-Encirclement-Type Band Clamps
for Reinforcement or Repair of Punctures or Holes in
Polyethylene Gas Pressure Pipe
This standard is issued under the fixed designation F1025; 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 2. Referenced Documents
1.1 This guide specifically addresses the design and instal- 2.1 ASTM Standards:
lation of full-encirclement-type band clamps for repair of F1041 Guide for Squeeze-Off of Polyolefin Gas Pressure
gouges, punctures, or holes, and for reinforcement of polyeth- Pipe and Tubing
ylene plastic pipe. Guidelines are provided for selecting and
using clamps in pipe sizes 2 in. nominal (60 mm) and larger. 3. Terminology
1.1.1 A test method is also provided for the user to assess
3.1 Definitions of Terms Specific to This Standard:
the applicability of the repair clamp. Under appropriate
3.1.1 creep—the time-dependent part of strain resulting
circumstances,thistypeofclampoffersaconvenient,effective,
from stress, that is, dimensional change caused by the appli-
and safe means of restoring the integrity of an in-service
cation of load over and above the elastic deformation and with
pipeline, without cutting out a section of pipe (see Note 1).The
respect to time.
pipe to be repaired cannot be backed by a stiffener for internal
support and cross-sectional dimensional control. Satisfactory
4. Significance and Use
use of this type of clamp must rely on the crush resistance of
4.1 Full-encirclement-type band clamps are recommended
the pipe itself and a fitting design concept, which retains the
for repairs only where the pipe is able to maintain its structural
cross-sectional pipe configuration while minimizing compres-
integrity. These clamps are not recommended for permanent
sive forces required to obtain an effective leakage seal.
repair of pipe where the damage could propagate outside the
NOTE 1—The appropriateness for use of this type of clamp should be
clamp under anticipated field conditions (see 5.1.1 for repair
determined by using the information contained in this guide and from
limitations). In such situations, cut out and replace the dam-
consultation with, and recommendations of, both the pipe and clamp
aged pipe with a new piece.
manufacturers. The basic premise for use of this type of clamp is that it is
recommended by the manufacturer for this specific application and that
4.2 These clamps may be used to cover holes left in the pipe
step-by-step installation instructions are available for that application. It is
from abandoned service line connections, purge points, and
important in the development of this type of clamp that prototype testing
accidental punctures.
be conducted to evaluate performance expectations because of the
physical limitations encountered when designing it for use with plastic
4.3 These clamps may be used to reinforce the pipe where
pipe.
the wall thickness has been reduced because of gouges or other
1.2 The values stated in inch-pound units are to be regarded
irregularities.
as standard. The values given in parentheses are mathematical
4.4 Some users reinforce polyethylene pipe after it has been
conversions to SI units that are provided for information only
squeezed-off as a precaution against pipe damage that may
and are not considered standard.
haveoccurredduringthesqueeze-offprocessandasameansof
1.3 This standard does not purport to address all of the
ensuring that the pipe will not be squeezed-off again at the
safety concerns, if any, associated with its use. It is the
same location. Consult with the polyethylene pipe manufac-
responsibility of the user of this standard to establish appro-
turer as to the appropriateness of squeeze-off for their product,
priate safety and health practices and determine the applica-
and for circumstances when reinforcement is recommended.
bility of regulatory limitations prior to use.
See Guide F1041.
This guide is under the jurisdiction ofASTM Committee F17 on Plastic Piping
Systems and is the direct responsibility of Subcommittee F17.60 on Gas. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Aug. 1, 2011. Published August 2011. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1986. Last previous edition approved in 2006 as F1025 – 94 (2006). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/F1025-94R11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1025 − 94 (2011)
5. General Considerations 6.1.8 The interface between the clamp and gasket material
maintains the position of the gasket within the band configu-
5.1 Thefollowinggeneralconsiderationsapplytodetermine
ration.
the appropriateness of using full-encirclement-type band
6.1.9 The dimensions of the clamp compensate for expected
clamps:
circumferential compression of the pipe, thereby ensuring a
5.1.1 Type or Extent of Failure—Consider repairs only to a
pressure seal when the pipe is in the contracted position.
clean-cut round hole or deep scratches or gouges of maximum
dimension, less than the nominal diameter of the pipe divided
7. Installation Recommendations
bythree.Donotrepairpipewithcracks,jaggedpunctures,long
7.1 Refer to the general considerations stated in Section 5 of
tears, or deep scratches or gouges which could propagate
this guide to determine the appropriateness of using full-
outside the clamp under anticipated field loads. Cut out and
encirclement-type band clamps to repair plastic pipe.
replace the damaged pipe with a new piece.
5.1.2 Pipe/Clamp Profile—This type of clamp is usually
7.2 Select a clamp with a length at least 1 ⁄2 times the
made from flexible materials which have minimal ring stiff-
nominal diameter of the pipe, but not less than 9 in. (229 mm)
ness. The clamp, by design, must rely on the pipe itself for an
long.
assembled profile and resistance to deformation from second-
7.3 Use on pipe which is clean and free of any irregularities
ary loading.
that affect its pr
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