ASTM F1025-94(2006)
(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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An American National Standard
Designation:F1025–94 (Reapproved 2006)
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 priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This guide specifically addresses the design and instal-
lation of full-encirclement-type band clamps for repair of
2. Referenced Documents
gouges, punctures, or holes, and for reinforcement of polyeth-
2.1 ASTM Standards:
ylene plastic pipe. Guidelines are provided for selecting and
F1041 Guide for Squeeze-Off of Polyolefin Gas Pressure
using clamps in pipe sizes 2 in. nominal (60 mm) and larger.
Pipe and Tubing
1.1.1 A test method is also provided for the user to assess
the applicability of the repair clamp. Under appropriate cir-
3. Terminology
cumstances, this type of clamp offers a convenient, effective,
3.1 Definitions of Terms Specific to This Standard:
and safe means of restoring the integrity of an in-service
3.1.1 creep—the time-dependent part of strain resulting
pipeline, without cutting out a section of pipe (see Note 1).The
from stress, that is, dimensional change caused by the appli-
pipe to be repaired cannot be backed by a stiffener for internal
cation of load over and above the elastic deformation and with
support and cross-sectional dimensional control. Satisfactory
respect to time.
use of this type of clamp must rely on the crush resistance of
the pipe itself and a fitting design concept, which retains the
4. Significance and Use
cross-sectional pipe configuration while minimizing compres-
4.1 Full-encirclement-type band clamps are recommended
sive forces required to obtain an effective leakage seal.
for repairs only where the pipe is able to maintain its structural
NOTE 1—The appropriateness for use of this type of clamp should be
integrity. These clamps are not recommended for permanent
determined by using the information contained in this guide and from
repair of pipe where the damage could propagate outside the
consultation with, and recommendations of, both the pipe and clamp
clamp under anticipated field conditions (see 5.1.1 for repair
manufacturers. The basic premise for use of this type of clamp is that it is
limitations). In such situations, cut out and replace the dam-
recommended by the manufacturer for this specific application and that
aged pipe with a new piece.
step-by-step installation instructions are available for that application. It is
4.2 These clamps may be used to cover holes left in the pipe
important in the development of this type of clamp that prototype testing
be conducted to evaluate performance expectations because of the
from abandoned service line connections, purge points, and
physical limitations encountered when designing it for use with plastic
accidental punctures.
pipe.
4.3 These clamps may be used to reinforce the pipe where
1.2 The values stated in inch-pound units are to be regarded the wall thickness has been reduced because of gouges or other
as the standard. The values given in parentheses are for
irregularities.
information only. 4.4 Some users reinforce polyethylene pipe after it has been
1.3 This standard does not purport to address all of the
squeezed-off as a precaution against pipe damage that may
safety concerns, if any, associated with its use. It is the haveoccurredduringthesqueeze-offprocessandas a means of
responsibility of the user of this standard to establish appro-
ensuring that the pipe will not be squeezed-off again at the
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 May 1, 2006. Published June 2006. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1986. Last previous edition approved in 2000 as F1025 – 94 (2000). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/F1025-94R06. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F1025–94 (2006)
same location. Consult with the polyethylene pipe manufac- 6.1.7 The gasket material is suitable for the intended service
turer as to the appropriateness of squeeze-off for their product, and of such hardness that significant compression of the pipe is
and for circumstances when reinforcement is recommended. not required to maintain a seal.
See Guide F1041. 6.1.8 The interface between the clamp and gasket material
maintains the position of the gasket within the band configu-
5. General Considerations ration.
6.1.9 The dimensions of the clamp compensate for expected
5.1 Thefollowinggeneralconsiderationsapplytodetermine
circumferential compression of the pipe, thereby ensuring a
the appropriateness of using full-encirclement-type band
pressure seal when the pipe is in the contracted position.
clamps:
5.1.1 Type or Extent of Failure—Consider repairs only to a
7. Installation Recommendations
clean-cut round hole or deep scratches or gouges of maximum
7.1 Refer to the general considerations stated in Section 5 of
dimension, less than the nominal diameter of the pipe divided
this guide to determine the appropriateness of using full-
bythree.Donotrepairpipewithcracks,jaggedpunctures,long
encirclement-type band clamps to repair plastic pipe.
tears, or deep scratches or gouges which could propagate
7.2 Select a clamp with a length at least 1 ⁄2 times the
outside the clamp under anticipated field loads. Cut out and
nominal diameter of the pipe, but not less than 9 in. (229 mm)
replace the damaged pipe with a new piece.
long.
5.1.2 Pipe/Clamp Profile—This type of clamp is usually
7.3 Use on pipe which is clean and free of any irregularities
made f
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