1、Designation: F3097 15Standard Practice forInstallation of an Outside Sewer Service Cleanout through aMinimally Invasive Small Bore Vacuum Excavation1This standard is issued under the fixed designation F3097; the number immediately following the designation indicates the year oforiginal adoption or,
2、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 installation methods, test methodsand required materials for
3、 the installation of an outside sewerservice clean out, by means of a small vacuum excavatedborehole. The utilization of this practice greatly reducesdisruption to the general public and requires minimal restora-tion.1.2 UnitsThe values stated in inch-pound units are to beregarded as standard. No ot
4、her units of measurement areincluded in this 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-priate safety and health practices and determine the applica-bility
5、of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C920 Specification for Elastomeric Joint SealantsD1600 Terminology for Abbreviated Terms Relating to Plas-ticsD2855 Practice for Making Solvent-Cemented Joints withPoly(Vinyl Chloride) (PVC) Pipe and FittingsD3034 Spec
6、ification for Type PSM Poly(Vinyl Chloride)(PVC) Sewer Pipe and FittingsF412 Terminology Relating to Plastic Piping Systems3. Terminology3.1 Unless otherwise indicated, definitions are in accor-dance with Terminology F412, and abbreviations are in accor-dance with Terminology D1600.3.2 Definitions o
7、f Terms Specific to This Standard:3.2.1 adhesive/sealantan elastomeric bonding agent de-signed to provide a water activated, leak resistant flexible bondbetween a PVC pipe saddle and a lateral sewer service pipe.3.2.2 borehole a small diameter vacuum excavated hole.3.2.3 cleanouta fitting located on
8、 a lateral sewer servicepipe having a vertical riser pipe extending therefrom to thesurface providing access to the lateral sewer service pipe.3.2.4 cleanout riser pipea section of pipe that is con-nected to the boss of a saddle and extends from the saddle tothe surface.3.2.5 coringthe process of re
9、motely cutting a hole throughthe crown of a sewer service pipe such that the coupon isretrieved to establish communication from a cleanout riser pipeand a lateral sewer service pipe.3.2.6 coupona disc shaped piece of the lateral sewerservice pipe produced by coring.3.2.7 lateral sewer service pipea
10、sewer pipe that connectsa building to a municipal, main sewer pipe in a lateral directionand collects sanitary waste or storm water.3.2.8 saddlea PVC saddle that encompasses more than50% of a lateral sewer service pipe where the side walls of thesaddle extend beyond the spring line of the host pipe.
11、 Thesaddle includes setoff tabs that allow for uniform distributionof the adhesive/sealant.3.2.9 setoff tabsProtruding tabs located on the undersideof the saddle one located on each side of the saddle boss for thepurpose of insuring a specific annulus between the host pipeand the saddle and a specif
12、ic layer thickness of adhesive/sealant.3.2.10 sondea device outfitted in a closed circuit videoinspection camera that emits a signal in subterranean pipelinesthat is traceable by use of a locating receiver at surface.4. Summary of Practice4.1 The process of installing a cleanout through a minimallyi
13、nvasive excavation begins with locating the 4 in. or 6 in. sewerservice lateral. This is accomplished by use of a CCTVoutfitted with a locatable sonde and vacuum excavating a smallborehole, providing access to the exterior surface of a lateral1This practice is under the jurisdiction of ASTM Committe
14、e F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.67 onTrenchless Plastic Pipeline Technology.Current edition approved May 15, 2015. Published June 2015. DOI: 10.1520/F3097152For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custome
15、r Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1sewer service pipe. Once the lateral se
16、wer service pipe hasbeen exposed, a self-clamping saddle is prepared by applyinga specified amount of adhesive/sealant to the underside of thesaddle and a riser pipe is attached to the boss of the saddle. Theprepared saddle is lowered into the small diameter bore holeuntil it contacts the lateral se
17、wer service pipe; a downwardforce is applied to the riser pipe causing the side walls of thesaddle to spread and encompass more than 50-percent of thehost pipe. Surface restoration is minimal and in most cases isaccomplished the same day the cleanout is installed.5. Significance and Use5.1 This prac
18、tice is for use by designers and specifiers,regulatory agencies, owners, and inspection organizations whoare involved in the installation of a sewer service cleanout6. Components6.1 The saddle shall be formed as a semi-circle and shallencompass more than 180-degrees of the pipe circumference.The sad
19、dle shall have an inner diameter equal to the outerdiameter of the host pipe (see Fig. 1).6.2 The riser pipe shall be PVC pipe in accordance withSpecification D3034.6.3 Adhesive/Sealant shall be in accordance with Specifica-tion C920.6.4 The solvent cement shall be in accordance with PracticeD2855.7
20、. Tools Required for Installation7.1 Vacuum excavation unitmobile piece of equipmentthat supplies sufficient volume of vacuum necessary to exca-vate a vertical bore hole.7.2 Coring equipmentA suitable coring saw with an outerdiameter18 in. less than the inner diameter if the riser pipe witha cutting
21、 blade suitable for the specific pipe material on whichthe cleanout has been installed.7.3 Power headpower device that rotates the coring saw.7.4 Extension rodsextension shafts that connect the powerhead to the coring saw. Available in various lengths accordingto the depth of the service lateral pip
22、e that the cleanout is beingattached to.7.5 Video cameraCCTV camera thats outfitted with asonde locating device and a compatible receiver. The camera issuitable sewer pipe conditions.7.6 WaterThe amount of water required to perform theexfiltration test is outlined in Table 1.8. Procedure8.1 The firs
23、t step in installing a trenchless sewer servicecleanout begins with locating the non-lined lateral sewerservice pipe. A method utilized and associated with thisinstallation process consists of inserting a video camera with aninternal sonde into the lateral service line remotely from themainline pipe
24、, or from the interior building cleanout. Atechnician at the surface uses a compatible receiver to locatethe signal from the camera/sonde to mark the specific locationfor the new cleanout as dictated by the utility owner (Refer toFig. 2). The identified location shall be marked by driving asteel pin
25、 in the soil when possible, or marking the surface withmarking paint. The video camera operator shall determine thecondition of the lateral pipe is suitable for the saddle placementprior to vacuum excavation to form the borehole.8.2 A borehole approximately 20-in. in diameter is createdby vacuum exc
26、avation. This is accomplished by cutting the soilby use of compressed air or by water jetting. The loosened soilis simultaneously drawn under a controlled vacuum throughsuction tubing and discharged into a mobile debris tank (Referto Fig. 3). This process continues until the lateral pipe isexposed.
27、The sewer service pipe is cleaned to remove debris.The cleaning process is accomplished by using an extendablewater pressure cleaning nozzle. A saddle is affixed to one endof a PVC riser pipe using solvent cement in accordance withPractice D2855. The elastomeric adhesive/sealant is applied tothe und
28、erside of the saddle. The pipe and saddle are lowereddown into the hole until the saddle contacts the pipe, a manualdownward force is applied to the riser pipe causing the sidewalls of the saddle to spread until the lower most portion of thesaddle extends a short distance beyond the spring line of t
29、hepipe causing the saddle to draw down onto the pipe producinga clamping affect.8.3 Once the saddle has been installed, (Refer to Fig. 4)approximately 4 oz. of water is introduced into the riser pipe inorder to activate the adhesive/sealant. Once the recommendedFIG. 1 Saddle greater than 180TABLE 1
30、Water Volume Required to Perform Leak TestDepth of Lateral (ft) Amount of Water Required (Gal)6 15.687 18.298 20.909 23.5110 26.1511 28.7312 31.3613 33.9614 36.5815 39.1816 41.8017 44.4018 47.0219 49.6320 52.25F3097 152time has passed after the saddle has been attached to the pipeand the vacuum exca
31、vated borehole is filled and compactedwith approved backfill material such as sand, the water test isperformed. Once the water test has passed, the crown of thelateral pipe is cored by means of a powered core saw that isinserted down the riser pipe into contact with the crown of thepipe removing the
32、 coupon within the core saw.8.3.1 Next, the annular space between the borehole and theriser pipe is filled with a minimum of 2 ft. of sand orpea-gravel. The remaining is backfilled as specified by theengineer to within 6-in. of the surface grade and an approvedcleanout cap is installed. The surface
33、is restored to match theexisting condition such as adding black soil with seed or sod,or concrete or asphalt. The adhesive/sealant is typically curedwithin 12 h of application and can be water tested any timethereafter. Once the saddle connection has been tested andconfirmed to be verifiably non-lea
34、king, the crown of the lateralpipe is cored and the cored coupon is retrieved through the corebit. The surface is then restored to its original condition8.4 Exfiltration Water TestPrior to coring for accessing thelateral pipe, an exfiltration water test shall be performed. Thisis accomplished by fil
35、ling the riser pipe with a minimumsix-foot column of water. The test shall be performed no lessthan 12-h from the time of affixing the saddle to the pipe. Thecolumn of water shall be left for a minimum of five (5)-minbefore commencing the exfiltration test. Next the water levelshall be measured from
36、 the top of the riser pipe for a five(5)-min period. No drop in water elevation will be allowed.The coupon shall not be cored until a verifiable non-leakingconnection has been confirmed. Should the leak test fail or notpass a repair is made by pouring a low viscosity epoxy resindown the riser pipe t
37、o a depth of 1 in. above the crown of thepipe. The epoxy resin leaches out through any breach in theseal sealing the breach. The epoxy resin cures and the leak testis performed again once the test passes then the coring processas described above is repeated. The crown of the pipe is nevercored openi
38、ng until the leak test has been satisfied proving averifiable non-leaking connection between the saddle and thelateral pipe has been made.9. Keywords9.1 adhesive; borehole; coring; coupon; minimally invasive;riser pipe; saddle; vacuum excavationFIG. 2 Locating the Lateral PipeFIG. 3 Vacuum Excavatio
39、n EquipmentFIG. 4 Vacuum Excavated BoreholeF3097 153ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rig
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