1、Designation: F2561 11An American National StandardStandard Practice forRehabilitation of a Sewer Service Lateral and Its Connectionto the Main Using a One Piece Main and Lateral Cured-in-Place Liner1, 2This standard is issued under the fixed designation F2561; the number immediately following the de
2、signation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers require
3、ments and test methods forthe reconstruction of a sewer service lateral pipe having aninner diameter of 3 to 12 in. and its connection to the main pipehaving an inner diameter of 6 to 24 in. without excavation. Thelateral pipe is accessed remotely from the main pipe and froma lateral cleanout. This
4、will be accomplished by the installationof a resin impregnated one-piece main and lateral curedin-place lining (MLCIPL) by means of air or water inflationand inversion. The MLCIPL is pressed against the host pipe bypressurizing a bladder and is held in place until the thermosetresins have cured. Whe
5、n cured, the MLCIPL shall be acontinuous, one piece, tight fitting, corrosion resistant liningextending over a predetermined length of the lateral pipe andthe adjacent section of the main pipe providing a verifiablenon-leaking structural connection and seal.1.2 The values stated in inch-pound units
6、are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 There is no similar or equivalent ISO Standard.1.4 This standard does not purport to address all of thesafety concerns, if
7、any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Particular attentionis drawn to those safety regulations and requirements involvingenterin
8、g into and working in confined spaces.2. Referenced Documents2.1 ASTM Standards:3D618 Practice for Conditioning Plastics for TestingD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating MaterialsD1600 Terminology for Abbreviated Terms Relating toP
9、lasticsD3681 Test Method for Chemical Resistance of “Fiber-glass” (GlassFiberReinforced Thermosetting-Resin)Pipe in a Deflected ConditionD5813 Specification for Cured-In-Place ThermosettingResin Sewer Piping SystemsF412 Terminology Relating to Plastic Piping SystemsF1216 Practice for Rehabilitation
10、of Existing Pipelines andConduits by the Inversion and Curing of a Resin-Impregnated Tube2.2 NASSCO Guidelines:4Recommended Specifications for Sewer Collection SystemRehabilitation3. Terminology3.1 DefinitionsUnless otherwise indicated, definitions arein accordance with Terminology F412, and abbrevi
11、ations are inaccordance with Terminology D1600.3.2 Definitions of Terms Specific to This Standard:3.2.1 access pointan existing manhole at either the up-stream or downstream end of a sewer main or a cleanoutlocated on the lateral pipe.3.2.2 bladdera transparent flexible plastic hose that whenpressur
12、ized, causes the main sheet to be pressed against themain pipe walls and the lateral tube to invert up into the sewerservice lateral. The bladder joined with the textile liningcreates a liner/bladder assembly.3.2.3 inversionthe process of turning a resin-impregnatedtube inside out by the use of air
13、or water pressure.1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.67 onTrenchless Plastic Pipeline Technology.Current edition approved Dec. 1, 2011. Published December 2011. Originallyapproved in 2006. Last
14、previous edition approved in D256106. DOI: 10.1520/F2561-11.2The rehabilitation of a sewer service lateral and its connection to the main usinga one-piece main and lateral cured-in-place liner is covered by patents (LMKEnterprises, Inc. 1779 Chessie Lane, Ottawa, IL 61350). Interested parties areinv
15、ited to submit information regarding the identification of acceptable alternativesto this patented item to the Committee on Standards,ASTM Headquarters, 100 BarrHarbor Drive, West Conshohocken, PA 19428-2959. Your comments will receivecareful consideration at a meeting of the responsible technical c
16、ommittee which mayattend.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4NASSCO, Inc. 11521 Cronridge Drive,
17、 Suite J, Owings Mills, MD 21117.www.nassco.org1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.4 launchercombination of a rigid elongated tube andlay-flat hose apparatus where the main bladder is attached andthe main sheet is wra
18、pped around the exterior of the rigidportion. The lateral bladder and lateral liner is drawn inside thehose. The launcher is positioned within the main pipe; airpressure is introduced into the hose causing inflation of themain bladder/ sheet and inversion of the lateral bladder tube.3.2.5 lifta port
19、ion of the MLCIPL that has cured in aposition such that it has pulled away from the existing pipewall.3.2.6 main and lateral cured in place lining (MLCIPL)atextile including plastic coating impregnated by a thermoset-ting resin. This pipe is formed within a portion of the existingmain pipe and the l
20、ateral pipe. Therefore, it takes the shape ofan existing TEE or WYE fitting and fits tightly to the existingpipes.3.2.7 resinpolyester, vinyl ester, epoxy or silicate resinsystems being ambient, steam, or hot water cured.3.2.8 resin slugexcess resin at the upper most end of alateral lining.3.2.9 sew
21、er service laterala pipe servicing a building or aside service.3.2.10 sheeta flat textile sheet that is formed into a 16inches long tube within the main pipe. The sheet is connectedto the lateral tube forming a one-piece TEE or WYE shapedfitting.3.2.11 transitionthe change in pipe diameter commonlyf
22、ound in lateral pipes.4. Significance and Use4.1 This practice is for use by designers and specifiers,regulatory agencies, owners, and inspection organizations whoare involved in the rehabilitation of sewer service laterals andits connection to the main through the use of a resin-impregnated tube in
23、stalled within an existing sewer lateral. Asfor any practice, modifications may be required for specific jobconditions.5. Materials5.1 Tube and Sheet:5.1.1 The main sheet and tube shall consist of one or morelayers of absorbent textile i.e. needle punched felt or circularknit that meet the requireme
24、nts of Practice F1216 and Speci-fication D5813, Sections 6 and 8. The main sheet and tube shallbe constructed to withstand installation pressures, have suffi-cient strength to bridge missing pipe segments, and flexibilityto fit irregular pipe sections. The volume of resin used shouldbe sufficient to
25、 fill all voids in the tube material at nominalthickness and diameter. The wet-out main sheet and tube shallhave a uniform thickness and excess resin distribution thatwhen compressed at installation pressures will meet or exceedthe design thickness after cure.5.1.2 The outside layer of the tube (bef
26、ore inversion) andthe interior of the main sheet (before inflation) shall be coatedwith an impermeable, translucent flexible membrane. The mainsheet before insertion shall be permanently marked as a lateralidentification correlating to the address of the building thelateral pipe services. The main s
27、heet and tube shall besurrounded by a second impermeable, flexible translucentmembrane (translucent bladder) that will contain the resin andfacilitate vacuum impregnation and monitoring of the resinsaturation during the resin impregnation (wet-out) procedure.5.1.3 The main sheet and lateral tube sha
28、ll be a one-pieceassembly formed as a TEE or WYE shaped fitting. Nointermediate or encapsulated elastomeric layers shall be in thetextile that may cause delamination in the cured in place pipe.The main sheet will be flat with one end overlapping thesecond end and sized accordingly to create a circul
29、ar liningequal to the inner diameter of the main pipe. The lateral tubewill be continuous in length and the wall thickness shall beuniform. The lateral tube shall include a hydrophilic O-ringattached to the interior surface at the tail end of the tube. Thelateral tube will be capable of conforming t
30、o offset joints, bells,and disfigured pipe sections.5.2 Resin:5.2.1 The resin/liner system shall conform to Test MethodD3681, 10 000-h test.5.2.2 The resin shall be a corrosion resistant polyester, vinylester, epoxy or silicate resin and catalyst system that whenproperly cured within the composite p
31、ipe assembly, meets therequirements of Practice F1216, the physical properties herein,and those, which are to be utilized in the design of the MLCIPLfor this project.5.2.3 The resin shall produce a MLCIPL, which will complywith the structural and chemical resistance requirements ofPractice F1216.6.
32、Design Considerations6.1 The MLCIPL shall be designed in accordance withPractice F1216,Appendix X1 in respect to the lateral and mainline tubes. If the mainline pipe has been renewed with astructural lining from manhole to manhole, then the mainlineportion of the MLCIPL is designed only for hydrosta
33、ticbuckling.6.1.1 The design for the main and lateral tube shall assumeno bonding to the original pipe.7. Installation Recommendations7.1 Access SafetyPrior to entering access areas such asmanholes or an excavation pit, performing inspection orcleaning operations, an evaluation of the atmosphere to
34、deter-mine the presence of toxic or flammable vapors or lack ofoxygen shall be undertaken in accordance with local, state, orfederal safety regulations.7.1.1 Cleaning and Pre-Inspection and Post Inspection,asper NASSCO (National Association of Sewer Service Compa-nies) Guidelines.7.1.2 Accessing the
35、 LateralA clean-out must be locatedoutside of the building and upstream at the upper end of thefinished lateral lining. In order to access both the upstream anddownstream sides of the lateral pipe, it is recommended thatthe cleanout isTEE shaped where the lateral and riser pipe join.7.1.3 PluggingTh
36、e upstream side of the cleanout shall beplugged during insertion and curing of the MLCIPL assemblyensuring no flows enter the pipe and no air, steam or odors willenter the building. When required, the main pipe flows will beby-passed. The pumping system will be sufficiently sized fornormal to peak f
37、low conditions. The upstream manhole isF2561 112monitored at all times and an emergency deflate system will beincorporated so that the plugs may be removed at any timewithout requiring confined space entry.7.1.4 Inspection of PipelinesThe interior of the pipelineshall be carefully inspected to deter
38、mine the location of anycondition that shall prevent proper installation, such as roots,and collapsed or crushed pipe. These conditions shall be notedso that they can be corrected before installation of theMLCIPL. Experienced personnel trained in locating breaks,obstacles, and service connections by
39、 closed circuit televisionshall perform inspection of pipelines.7.1.5 Line ObstructionsThe existing service lateral shallbe clear of obstructions that prevent the proper insertion andexpansion of the lining system. Changes in pipe size shall beaccommodated, by sizing the lateral tube according to th
40、e pipediameter and condition. Obstructions may include dropped oroffset joints of no more than 20 % of inside pipe diameter.7.2 Resin ImpregnationThe lateral tube and main sheetencapsulated within the translucent bladder (liner/bladder as-sembly) shall be vacuum-impregnated with resin (wet-out)under
41、 controlled conditions. The volume of resin used shall besufficient to fill all voids in the textile lining material atnominal thickness and diameter. The volume shall be adjustedby adding 5 to 10 % excess resin for the change in resinvolume due to polymerization and to allow for any migrationof res
42、in into the cracks and joints in the original pipe. No dryor unsaturated area in the main sheet or lateral tube shall beacceptable upon visual inspection.7.3 MLCIPL InsertionThe lateral tube and inversion blad-der will be inserted into the carrying device. The main bladderis connected to the launchi
43、ng device by an airtight clampingsystem. The main sheet is wrapped around the “T” launchingdevice and held firmly by four (4) hydrophilic o-rings. Atwo-part 100 % solid epoxy shall be applied as a two-inch(2-in.) wide band in a volume of 300 mL to the main sheet/lateral tube interface. Both the laun
44、ching and carrying deviceare pulled into the pipe using a cable winch. The pull iscomplete when the main sheet/ lateral tube interface is alignedwith the service connection within the main pipe. The lateraltube is completely protected during the pull. The main sheet issupported upon the rigid “T” la
45、uncher that is elevated abovethe pipe invert by means of a rotating skid system. TheMLCIPL assembly shall not be contaminated or diluted byexposure to dirt, debris, or water during the pull.7.4 The bladder is inflated causing the tubular main sheet tobe unfolded and the hydrophilic o-rings expanded
46、as both arepressed against the main pipe. The lateral tube is invertedthrough the center of the tubular shaped main sheet up into theexisting lateral pipe by the action of the lateral bladder as thetube is fully extended to the designated termination point. Themain and lateral bladders shall extend
47、past the terminationpoints of the main sheet and the tube causing ends to remainopen whereby no cutting for reinstatement is required.7.5 CuringAfter insertion is complete, pressure is main-tained pressing the MLCIPL firmly against the inner pipe wall.The MLCIPL is chemically cured at ambient temper
48、atures orby a suitable heat source. The heating equipment shall becapable of delivering and circulating a mixture of steam and airor hot water throughout the MLCIPL to uniformly raise thetemperature above the temperature required to cure the resin.The curing of the MLCIPL must take into account the
49、existingpipe material, the resin system, and ground conditions (tem-perature, moisture level, and thermal conductivity of the soil).When using a heat source, temperatures shall be monitored andlogged at the upstream end of the lateral lining during the cureand cool down cycles. The manufacturers recommended cureschedule shall be submitted.7.6 MLCIPL ProcessingCuring shall be done withoutpressure interruption with air or a mixture of air and steam forthe proper duration of time per the resin manufacturersrecommendations. When the heat source is removed and the
