1、Designation: F2561 16Standard 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 designation indicates the year o
2、foriginal 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. Scope*1.1 This practice covers requirements and test methods forthe
3、 reconstruction of a sewer service lateral pipe having aninner diameter of 3 to 12 in. (7.6 to 30.5 cm) and its connectionto the main pipe having an inner diameter of 6 to 24 in. (15.2to 61.0 cm) without excavation. The lateral pipe is accessedremotely from the main pipe and from a lateral cleanout.
4、 Thiswill be accomplished by the installation of a resin impregnatedone-piece main and lateral cured-in-place lining (MLCIPL) bymeans of air or water inflation and inversion. The MLCIPL ispressed against the host pipe by pressurizing a bladder and isheld in place until the thermoset resins have cure
5、d. Whencured, the MLCIPL shall be a continuous, one piece, tightfitting, corrosion resistant lining extending over a predeter-mined length of the lateral pipe and the adjacent section of themain pipe, providing a verifiable non-leaking structural con-nection and seal.1.2 The values stated in inch-po
6、und units 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 con
7、cerns, if 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 involv
8、ingentering 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 Materi-alsD1600 Terminology forAbbreviated Terms Re
9、lating to Plas-ticsD3681 Test Method for Chemical Resistance of “Fiberglass”(GlassFiberReinforced Thermosetting-Resin) Pipe in aDeflected ConditionD5813 Specification for Cured-In-Place ThermosettingResin Sewer Piping SystemsF412 Terminology Relating to Plastic Piping SystemsF1216 Practice for Rehab
10、ilitation 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, a
11、nd abbreviations 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 w
12、henpressurized, causes the main sheet to be pressed against the1This 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 April 1, 2016. Published Ma
13、y 2016. Originallyapproved in 2006. Last previous edition approved in 2011 as . DOI: 10.1520/F2561-16.2The 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, Ot
14、tawa, IL 61350). Interested parties areinvited 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
15、at a meeting of the responsible technical committee 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 w
16、ebsite.4NASSCO, Inc. 11521 Cronridge Drive, Suite J, Owings Mills, MD 21117.www.nassco.org*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1main pipe walls and the lateral
17、 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 or water pressure.3.2.4 launchercombination of a rigid elongated tube andlay-flat ho
18、se apparatus where the main bladder is attached andthe main sheet is wrapped around the exterior of the rigidportion. The lateral bladder and lateral tube are drawn insidethe hose. The launcher is positioned within the main pipe; airpressure is introduced into the hose causing inflation of themain b
19、ladder/sheet and inversion of the lateral bladder tube.3.2.5 lifta portion of the MLCIPL that has cured in aposition such that it has pulled away from the host pipe wall.3.2.6 main and lateral cured-in-place lining (MLCIPL)atextile including plastic coating impregnated by a thermoset-ting resin. Thi
20、s pipe is formed within a portion of the existingmain pipe and the lateral 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
21、 slugexcess resin at the uppermost end of alateral lining.3.2.9 sewer service laterala pipe servicing a building or aside service.3.2.10 sheeta flat textile sheet that is formed into a 16 in.(40.6 cm) long tube within the main pipe. The sheet isconnected to the lateral tube forming a one-piece TEE o
22、r WYEshaped fitting.3.2.11 transitionthe change in pipe diameter commonlyfound 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 an
23、dits connection to the main through the use of a resin-impregnated tube installed 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 lateral tube shall consist of one ormore layers of
24、absorbent textile that is, needle punched felt orcircular knit that meet the requirements of Practice F1216 andSpecification D5813, Sections 6 and 8. The main sheet andlateral tube shall be constructed to withstand installationpressures and to have sufficient strength to bridge missing pipesegments
25、and flexibility to fit irregular pipe sections. Thevolume of resin used should be sufficient to fill all voids in thetube material at nominal thickness and diameter. The wet-outmain sheet and lateral tube shall have a uniform thickness andexcess resin distribution that when compressed at installatio
26、npressures, the MLCIPL will meet or exceed the design thick-ness after cure.5.1.2 The outside layer of the tube (before inversion) andthe interior of the main sheet (before inflation) shall be coatedwith an impermeable, translucent flexible membrane. The mainsheet before insertion shall be permanent
27、ly marked with alateral identification correlating to the address of the buildingthat the lateral pipe services. The main sheet and lateral tubeshall be surrounded by a second impermeable, flexible trans-lucent membrane (translucent bladder) that will contain theresin and facilitate vacuum impregnat
28、ion and monitoring of theresin saturation during the resin impregnation (wet-out) proce-dure.5.1.3 The main sheet and lateral tube shall 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
29、in the cured-in-place pipe.The main sheet will be flat with one end overlapping thesecond end and sized accordingly to create a circular 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 inc
30、lude a hydrophilic O-ringattached to the interior surface at the tail end of the tube. Thelateral tube will be capable of conforming to 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
31、 corrosion resistant polyester, vinylester, epoxy or silicate resin and catalyst system that whenproperly cured within the composite pipe 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.
32、5.2.3 The resin shall produce a MLCIPL, which will complywith the structural and chemical resistance requirements ofPractice F1216.6. Design Considerations6.1 The MLCIPL shall be designed in accordance withPractice F1216, Appendix X1, with respect to the lateral andmain line tubes. If the mainline p
33、ipe has been renewed with astructural lining from manhole to manhole, then the mainlineportion of the MLCIPL is designed only for hydrostaticbuckling.6.1.1 The design for the main sheet and lateral tube shallassume no bonding to the host pipe.7. Installation Recommendations7.1 Access SafetyPrior to
34、entering access areas such asmanholes or an excavation pit, performing inspection, orcleaning operations, an evaluation of the atmosphere to 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 C
35、leaning and Pre-Inspection and Post Inspection, inaccordance with NASSCO (National Association of SewerService Companies) Guidelines.F2561 1627.1.2 Accessing the LateralA clean-out must be locatedoutside of the building and upstream at the upper end of thefinished lateral lining. In order to access
36、both the upstream anddownstream sides of the lateral pipe, it is recommended thatthe cleanout is TEE shaped where the lateral and riser pipe join.7.1.3 PluggingThe upstream side of the cleanout shall beplugged during insertion and curing of the MLCIPL assembly,ensuring no flows enter the pipe and no
37、 air, steam, or odors willenter the building. When required, the main pipe flows will bebypassed. The pumping system will be sufficiently sized fornormal to peak flow conditions. The upstream manhole ismonitored at all times and an emergency deflate system will beincorporated so that the plugs may b
38、e removed at any timewithout requiring confined space entry.7.1.4 Inspection of PipelinesThe interior of the pipelineshall be carefully inspected to determine the location of anycondition that shall prevent proper installation, such as rootsand collapsed or crushed pipe. These conditions shall be no
39、tedso that they can be corrected before installation of theMLCIPL. Experienced personnel trained in locating breaks,obstacles, and service connections by closed circuit televisionshall perform inspection of pipelines.7.1.5 Line ObstructionsThe existing service lateral shallbe clear of obstructions t
40、hat prevent the proper insertion andexpansion of the lining system. Changes in pipe size shall beaccommodated, by sizing the lateral tube according to the pipediameter and condition. Obstructions may include dropped oroffset joints of no more than 20 % of the inside pipe diameter.7.2 Resin Impregnat
41、ionThe lateral tube and main sheetencapsulated within the translucent bladder (liner/bladder as-sembly) shall be vacuum-impregnated with resin (wet-out)under controlled conditions. The volume of resin used shall besufficient to fill all voids in the textile lining material atnominal thickness and di
42、ameter. 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 resin into the cracks and joints of the host pipe. No dry orunsaturated area in the main sheet or lateral tube shall beacceptable upon visual insp
43、ection.7.3 MLCIPL InsertionThe lateral tube and inversion blad-der will be inserted into the carrying device. The main bladderis connected to the launching device by an airtight clampingsystem. The main sheet is wrapped around the “T” launchingdevice and held firmly by four (4) hydrophilic O-rings.
44、Atwo-part 100 % solid epoxy shall be applied as a 2 in. (5.1 cm)wide band in a volume of 300 mL to the main sheet/ lateraltube interface. Both the launching and carrying device arepulled into the pipe using a cable winch. The pull is completewhen the main sheet/ lateral tube interface is aligned wit
45、h theservice connection within the main pipe. The lateral tube iscompletely protected during the pull. The main sheet issupported upon the rigid “T” launcher that is elevated abovethe pipe invert by means of a rotating skid system. TheMLCIPL assembly shall not be contaminated or diluted byexposure t
46、o 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 to be expanded as bothare pressed against the main pipe. The lateral tube is invertedthrough the center of the tubular shaped main sheet up into theexisting l
47、ateral pipe by the action of the lateral bladder until thelateral tube is fully extended to the designated terminationpoint. The main and lateral bladders shall extend past thetermination points of the main sheet and the lateral tube,respectively, causing the ends to remain open whereby nocutting fo
48、r reinstatement is required.7.5 CuringAfter insertion is complete, pressure ismaintained, pressing the MLCIPL firmly against the inner pipewall. The MLCIPL is chemically cured at ambient temperatureor by a suitable heat source. The heating equipment shall becapable of delivering and circulating a mi
49、xture 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 existingpipe material, the resin system, and ground conditions(temperature, moisture level, and thermal conductivity of thesoil). When using a heat source, temperatures shall be moni-tored and logged at the upstream end of the lateral lining duringthe cure and cool down cycles. The manufacturers recom-mended cure schedule shall be submitted.7.6 MLCIPL ProcessingCuring shal
