1、Designation: F 2719 09Standard Practice forInstallation of Polyethylene (PE) and Encapsulated CementMortar Formed in Place Lining System (FIPLS) for theRehabilitation of Water Pipelines1This standard is issued under the fixed designation F 2719; the number immediately following the designation indic
2、ates 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 requirements and test
3、methods forinstallation of a semi-structural polyethylene (PE) and encap-sulated cement mortar formed-in-place lining system (FIPLS)intended for the rehabilitation of water pipelines from 4 in. to12 in. This renewal process involves installing a folded PEliner with multiple hooks on the outside face
4、 into an existingwater pipeline then pumping cement mortar into the annularspace and progressively reforming the liner against the originalpipe wall by means of forcing a reforming device through thepipeline.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in
5、 parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro
6、-priate safety and health practices and determine the applicabil-ity of regulatory limitations prior to use. Particular attention isdrawn to those safety regulations and requirements involvingentering into and working in confined spaces.1.4 This practice is to be used with the material specified in4
7、.2.1 of F 2718 the Standard Specification for Polyethylene(PE) and Encapsulated Cement Mortar Formed in Place LiningSystem (FIPLS) for the Rehabilitation of Water Pipelines.2. Referenced Documents2.1 ASTM Standards:2C 109/C 109M Test Method for Compressive Strength ofHydraulic Cement Mortars (Using
8、2-in. or 50-mm CubeSpecimens)D 1600 Terminology for Abbreviated Terms Relating toPlasticsF 412 Terminology Relating to Plastic Piping SystemsF 2718 Specification for Polyethylene (PE) and CementMaterials for an Encapsulated Cement Mortar LiningSystem for the Rehabilitation (FIPLS) of Water Pipelines
9、2.2 AWWA/ANSI Standard:3C651 Disinfecting Water MainsManual M28 Rehabilitation of Water Mains2.3 NSF/ANSI Standards:4NSF/ANSI 14 for Plastic Ping Components and relatedMaterialsNSF/ANSI 61 for Drinking Water Systems Components Health Effects3. Terminology3.1 DefinitionsUnless otherwise indicated, de
10、finitions arein accordance with terminology F 412, and abbreviations are inaccordance with Terminology D 1600. The abbreviation ofpolyethylene is PE.3.2 Definitions of Terms Specific to This Standard:3.2.1 liner, na PE sheet with integral anchors extruded ina flat shape then formed with overlapping
11、edges and fusionwelded into a cylindrical shape. The collapsed liner or lay flattube is folded into a C configuration thereby reducing its areaand pulled into the host pipe.3.2.2 cement mortar, na specially formulated cementbased grout.3.2.3 formed-in-place-liner system (FIPLS), nafter inser-tion of
12、 the liner and cement mortar, sequential insertion andreforming of the liner and cement mortar in the host pipe, asemi-structural composite lining of cement mortar with PEexternal surface is formed. See Fig. 1 and Fig. 2.3.2.4 semi-structural, adjlining systems designed tobridge small holes and gaps
13、 and seal leaking joints in the hostpipe and having sufficient inherent stiffness to be self support-ing without dependence on adhesion to the pipe wall.3.2.4.1 Discussion Appendix A of AWWA Manual M28 “Structural Lining Design Issues,” contains a more detailed1This practice is under the jurisdictio
14、n of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.67 onTrenchless Plastic Pipeline Technology.Current edition approved April 15, 2009. Published May 2009.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer
15、Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Water Works Association (AWWA), 6666 W. QuincyAve., Denver, CO 80235, http:/www.awwa.org.4Available from NSF International, P.O. B
16、ox 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.These figures are intended only for clarification of terms specific to this standard and show a representative
17、Formed-In-Place Liner System.FIG. 1 PE and Encapsulated Cement Mortar Formed-In-Place Liner System (FIPLS)These figures are intended only for clarification of terms specific to this standard and show a representative Formed-In-Place Liner System.FIG. 2 PE Liner with Protruding HooksF2719092discussio
18、n of structural classification of lining techniques.The following is taken from Manual M28: “Class II and ClassIII Linings are both interactive and semi-structural systems.Since the stiffness of such a lining is less than that of the hostpipe, all internal pressure loads are transferred to the host
19、pipeleading to their classification as interactive. Such a lining isrequired only to independently sustain internal pressure loadsat discontinuities in the host pipe, such as corrosion holes orjoint gaps, or if the host pipe is subject to structural failure.”4. Materials4.1 Basic Materials:4.2 The P
20、E liner shall be made from PE material meeting allthe minimum physical properties as listed in F 2718, “ Stan-dard Specification for Polyethylene (PE) and Cement Materialsfor an Encapsulated Cement Mortar Lining System for theRehabilitation (FIPLS) of Water Pipelines.” In addition, the PEliner shall
21、 have the properties shown in Table 1.4.3 The cement mortar is used to fill the annular spacebetween outer surface of the liner and the host pipe. Thecement mortar shall have the minimum physical properties aslisted in F 2718, “ Standard Specification for Polyethylene (PE)and Encapsulated Cement Mor
22、tar Lining System for theRehabilitation (FIPLS) of Water Pipelines.”4.4 The Polyethylene and cement mortar formed-in-placelining system (FIPLS) shall have the minimum properties asshown in Table 2.NOTE 1Samples will be taken of the cement mortar material andtested throughout the installation process
23、 to confirm its compliance to theproperties listed in Table 2 and as specified in F 2718, “StandardSpecification for Polyethylene (PE) and Encapsulated Cement MortarLining System for the Rehabilitation (FIPLS) of Water Pipelines.”5. Significance and Use5.1 This practice is for use by specifiers, reg
24、ulatory agen-cies, owners and inspection organizations that are involved inthe rehabilitation of pressure mains and conduits, and inparticular potable water lines in the diameter range of 4 to 12inches. The supplier of the FIPLS lining system product shouldbe consulted for design and installation in
25、formation.6. Installation Requirements6.1 Cleaning and Inspection:6.1.1 Access SafetyPrior to entering any confined space,and performing inspection or cleaning operations, an evalua-tion of the atmosphere to determine the presence of toxic orflammable vapors or lack of oxygen must be undertaken inac
26、cordance with local, state, or federal safety regulations.6.1.2 Cleaning of PipelineInternal debris, including scal-ing and deposit buildups, shall be removed from the existingpipeline prior to installation of the product. Pipes should becleaned with hydraulically powered equipment, or mechani-cally
27、 powered equipment. Any free standing water shall beremoved from the pipe.6.1.3 Inspection of PipelinesThe interior of the pipelineshall be carefully inspected to determine the location of anycondition(s) that shall prevent proper installation. These con-ditions shall be noted and corrected prior to
28、 installation.Experienced personnel trained in locating breaks, obstacles,and service connections by closed circuit television (CCTV)shall perform inspection of pipelines. CCTV inspection shallbe performed after cleaning to ensure the pipeline is ready forrehabilitation.6.1.4 Line ObstructionsThe ex
29、isting pipeline shall beclear of obstructions that prevent the proper insertion andexpansion of the lining system.6.2 Liner Insertion :6.2.1 The liner sections are positioned near their respectiveaccess points. A mechanical folding device may be positionedon the host pipe in order to fold the liner
30、for winching throughthe host pipeline. A winch shall be placed at the oppositeaccess, and the winch cable strung through the host pipe andthen attached to the liner pulling head. Alternatively the linermay be pulled in by hand. The liner is winched through thefolding device and along the length of m
31、ain to be lined. Caremust be taken to avoid any twisting of the liner as it travelsthrough the main. When the liner reaches the winch end, thewinch is stopped and an extra 2 yards (2 metres) of liner arepulled through by hand. One yard (1 metre) of the liner pulledout of the host pipe and is cut out
32、 and inspected for damageduring insertion. If serious damage is observed, the liner shouldbe removed and the cause of the damage located and rectifiedprior to the insertion of a new length of liner into the main.Damage will consist of tearing or cutting of the liner or seriousabrasion and gouging of
33、 the surface of the liner extending tomore than 20% of the wall thickness.6.3 Grouting of the Annulus:6.3.1 Protection of service connections Prior to the grout-ing operation service connections should be pre-plugged orcorked to prevent ingress of the cement mortar.6.3.2 Grouting operations shall be
34、 conducted from thedownstream to the upstream access points. The grout fittings atthe downstream end and the air release fittings at the upstreamend of the liner shall be inspected in accordance with thesuppliers recommendations. A sufficient amount of grout shallbe positioned at the downstream acce
35、ss point and the mixingequipment set-up and tested for proper operation in accordancewith the suppliers recommendations. A quality control stationshall be set-up adjacent to cement mortaring operation. Thecement mortar machines shall be brought on line and the groutchecked for temperature, viscosity
36、, and water-cement ratio inaccordance with the suppliers recommendations. When therecommended parameters have been achieved the groutingoperation shall begin. Once grouting of the annulus has begun,the cementing operation shall not stop until completed.6.4 Introduction of the Rounding Device:TABLE 1
37、 Properties of the Polyethylene LinerProperty ASTM Test Method Minimum Value HookConcentration 105 /in2(16 /cm2)TABLE 2 Physical Properties of the Polyethylene and CementMortar Formed-in-Place Lining SystemProperty ASTM Test Method Minimum Value Hook28 Day Compressive Strength C 109/C 109M 7,000 psi
38、 (55 MPa)Resistance to pull out of the hooks 40 psi (0.28 MPa)F27190936.4.1 After introduction of the grout, the rounding device(pig) is inserted into the launcher. Air is introduced behind therounding device. The pressure should be increased until therounding device starts to move. The pressure sho
39、uld bemaintained as the rounding device travels through the sectionbeing lined.6.5 Hydration of the Cement Mortar:6.5.1 When the PE liner and grout have been installed, thefittings are sealed and the pressure in the liner increased.During hydration, the internal pressure on the lining may bemaintain
40、ed by use of compressed air only or by filling the linerwith water and maintaining the desired pressure. Pressureshould be maintained on the liner throughout hydration, untilthe cement has sufficiently hardened and the lining system isfully self-supporting and able to resist the short-term externalh
41、ydrostatic loading. At this time the pressure may be relieved.The lining system must remain undisturbed until the cementhas hardened, after which time, return to service proceduresmay commence. Once the cement has hardened the installationfitting may be removed, the inflation liner pulled out anddis
42、carded and the ends of the liner trimmed.7. Post Lining Procedure7.1 The cement mortar shall be cured for a period of timedepending upon the ambient air temperature and flow condi-tions, but not less than 16 h. The cement mortar that remains inthe cement liners and port shall be inspected to determi
43、ne if therequired amount of cure (16 h) has been achieved.7.2 InspectionA closed-circuit television (CCTV) inspec-tion shall be carried out over the entire length of the installationto ensure that the lining conforms to the walls of the main andthat the lining system is free from defects. The grout
44、distribu-tion is to be inspected using infra red thermography. Groutvoids detected by the inspection should be repaired as recom-mended by the lining system manufacturer.7.3 DisinfectionBefore the lined section is reconnected tothe main, the installation shall be disinfected (chlorinated).Anyline cu
45、touts and any fittings shall be disinfected using ahypochlorite solution as approved by the client engineer. Afterthe specified time has elapsed, the main is flushed until thechlorine residual measured at the discharge point is equal tothat of the water entering the main.NOTE 2The rehabilitated main
46、 is normally charged with suitablychlorinated water, the residual chlorine level and contact time beingdetermined by the Clients Standard Practice for return to serviceprocedures. In the US, the American Water Works Association StandardANSI/AWWA C651 shall apply.7.4 Reconnecting to the active distri
47、bution systemReconnect the rehabilitated section to the active distributionsystem by installing spool pieces, couplings, ferrules and anyother required fittings. Materials used for reconnection shall besprayed with chlorine solution before incorporation into theworks to prevent pollution from occurr
48、ing. Service connectionsare to be reconnected by first removing the sealing plugs, thendrilling a hole through the center of the taping. The PE linerand cement shall be milled from this central hole to the outsideof the taping. A tap shall be run through the original taping toclean any residual ceme
49、nt from the threads. A new serviceferule shall be screwed into the original taping for reconnectionof the household supply. The ends of the lining shall be cutsquare and the propriety Top-Hat fitting pushed inside the liner.Spool pieces can be used to connect the lined section back intothe networkNOTE 3Access holes are required to be backfilled and surfacereinstatement carried out to the approval of the client. This work shouldideally be carried out within 24 h of testing.8. Keywords8.1 cement mortar; encapsulated; FIPLS; formed-in-placeliner system; grout;
