ASTM F1025-94(2000)
(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
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 1). 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 1--The 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.
1.3This 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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An American National Standard
Designation:F 1025–94 (Reapproved 2000)
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 F 1025; 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 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 F 1041 Guide for Squeeze-Off of Polyolefin Pressure Pipe
gouges, punctures, or holes, and for reinforcement of polyeth- and Tubing
ylene plastic pipe. Guidelines are provided for selecting and
3. Terminology
using clamps in pipe sizes 2 in. nominal (60 mm) and larger.
3.1 Definitions of Terms Specific to This Standard:
1.1.1 A test method is also provided for the user to assess
the applicability of the repair clamp. Under appropriate cir- 3.1.1 creep—the time-dependent part of strain resulting
from stress, that is, dimensional change caused by the appli-
cumstances, this type of clamp offers a convenient, effective,
and safe means of restoring the integrity of an in-service cation of load over and above the elastic deformation and with
respect to time.
pipeline, without cutting out a section of pipe (see Note 1).The
pipe to be repaired cannot be backed by a stiffener for internal
4. Significance and Use
support and cross-sectional dimensional control. Satisfactory
4.1 Full-encirclement-type band clamps are recommended
use of this type of clamp must rely on the crush resistance of
for repairs only where the pipe is able to maintain its structural
the pipe itself and a fitting design concept, which retains the
integrity. These clamps are not recommended for permanent
cross-sectional pipe configuration while minimizing compres-
repair of pipe where the damage could propagate outside the
sive forces required to obtain an effective leakage seal.
clamp under anticipated field conditions (see 5.1.1 for repair
NOTE 1—The appropriateness for use of this type of clamp should be
limitations). In such situations, cut out and replace the dam-
determined by using the information contained in this guide and from
aged pipe with a new piece.
consultation with, and recommendations of, both the pipe and clamp
4.2 These clamps may be used to cover holes left in the pipe
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 from abandoned service line connections, purge points, and
step-by-step installation instructions are available for that application. It is
accidental punctures.
important in the development of this type of clamp that prototype testing
4.3 These clamps may be used to reinforce the pipe where
be conducted to evaluate performance expectations because of the
the wall thickness has been reduced because of gouges or other
physical limitations encountered when designing it for use with plastic
irregularities.
pipe.
4.4 Some users reinforce polyethylene pipe after it has been
1.2 The values stated in inch-pound units are to be regarded
squeezed-off as a precaution against pipe damage that may
as the standard. The values given in parentheses are for
haveoccurredduringthesqueeze-offprocessandas a means of
information only.
ensuring that the pipe will not be squeezed-off again at the
1.3 This standard does not purport to address all of the
same location. Consult with the polyethylene pipe manufac-
safety concerns, if any, associated with its use. It is the
turer as to the appropriateness of squeeze-off for their product,
responsibility of the user of this standard to establish appro-
and for circumstances when reinforcement is recommended.
priate safety and health practices and determine the applica-
See Guide F 1041.
bility of regulatory limitations prior to use.
This guide is under the jurisdiction ofASTM Committee F-17 on Plastic Piping
Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved July 15, 1994. Published September 1994. Originally
published as F 1025 – 86. Last previous edition F 1025 – 86. Annual Book of ASTM Standards, Vol 08.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 1025
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.
7.2 Select a clamp with a length at least 1 ⁄2 times the
5.1.2 Pipe/Clamp Profile—This type of clamp is usually
nominal diameter of the pipe, but not less than 9 in. (229 mm)
made from flexible materials which have minimal ring stiff-
long.
ness. The clamp, by design, must rely on the pipe itself for an
7.3 Use on pipe which is clean and free of any irregularities
assembled profile and resistance to deformation from second-
that affect its profile.
ary loading.
7.4 Center the clamp over the area to be repaired.
5.1.3
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