..Undergroundpipelineanticorrosiveconstructionplan地下管道防腐施工方案DocumentNo.:文件編號：CNI23-CM-016FabricationExamineandverifyApprovalContents目錄Projectoverview工程概況.........................................................1-3Fabricationreference編制依據.........................................................3-3Constructionprinciple三、施工原則.........................................................3-33PEanticorrosiveproductionprocess四、3PE防腐生產工藝流程..............................................4-93PEanticorrosivespecificproductionsteps3PE防腐具體制作步驟.............................................9-13Heatshrinkabletapeanticorrosiveconcretesteps六、熱收縮帶防腐具體步驟............................................14-15Safetyattentions七、安全注意事項....................................................16-16ProjectOverview一、工程概況ThisprojectisLindeHuayi<Chongqing>GasesCo.,Ltd1BillionNm3/yearSyngasCO/H2project,locatedinChongqing<Changshou>ChemicalIndustryPark,andthemainworkcontainssubstation、compressionunit、powerabsorptionunit、washingunit、rawgascompressorunit、Hightemperatureshiftunitetc..本項目為林德化醫〔XX氣體10億Nm3/年合成氣制備CO/H2項目,位于XX〔長壽化工園區內,其中主體工作包括變電所、壓縮單元、變電吸附單元、洗滌單元、原料氣壓縮單元、高溫變換單元等。Undergroundpipelinecontainscirculatingwatersystem,watersystem,watersupplyanddrainagesystem,atotalofabout1744mweldingpipeextension,Dia-intotalof10070inch,buriedsteelpipeanticorrosionmethods3PEcoating,toensurethattheundergroundpipelineanticorrosionconstructionsafety,highquality,efficientcompletionoftheproject,especiallythepreparationofthisplan.地下管道包括循環水系統、工業水系統、給排水系統,管道共計延長米約1744m,焊接Dia-in共計10070寸,埋地鋼管防腐方法采用3PE涂層防腐,為保證地下管道防腐施工安全、優質、高效完成,特編制本方案。Fabricationreference二、編制依據Linderelateddrawingandtechnicalstandard林德相關圖紙、技術標準Polyethylenecoatingforburiedsteelpipeline埋地鋼制管道聚乙烯防腐層........................................<GB/T23257-2009>Watersupplyanddrainagepipelineengineeringconstructionandacceptance《給排水管道工程施工及驗收規范》...................................〔GB50268-97Petroleumandchemicalequipmentandpipelinetechnicalspecificationforthecoatinganticorrosion《石油化工設備和管道涂料防腐蝕技術規范》..........................〔SH3022-1999Technicalcodeforconstructionsafetyinpetrochemical石油化工施工安全技術規程.........................................〔SH3505-99Petrochemicalindustryspecificationforconstructionandacceptanceofwatersupplyanddrainagepipeline石油化工給排水管道施工及驗收規范.................................<SH3533-2003>Steelsurfacebeforeapplicationofpaintandrustgradesandpreparationgrade涂裝前鋼材表面銹蝕等級和除銹等級..................................〔GB8923-88ConstructionPrinciple三、施工原則Undergroundpipeline,pipeanti-corrosionworkbyprofessional3PEcoatingmanufacturers,inChongqingarea3PEcoatingtechnologyandscaleofproductiontoreachthecoastalareasofthecorrosionandscale,isnowtheChongqingarea3PEpipelinecoatingproductionintherangeof20-950mm,thediametermorethan950mmpipeusingthermalbeltwindinganticorrosion,andallfittings,mending,weldingusingthesamePEshrinkwithanti-corrosion,anti-corrosionprocessingplantintheaboveworkfocusedonthecomplete,reachthemaintenanceperiod,transportedintotheconstructionsiteinstallation,pressuretestafterpassingtherequiredrepairingandmending.地下管道、管件防腐工作由專業3PE防腐廠家完成,鑒于XX地區3PE涂敷技術及生產規模達不到沿海地區的防腐水平及規模,現目前XX地區3PE管道防腐生產范圍在20-950mm,對于管徑超過950mm的管道采用熱縮帶纏繞防腐,且所有管件、補傷、焊口同樣采用聚乙烯熱縮帶防腐,以上防腐工作集中在加工廠內完成,達到養護期后,運入施工現場安裝,試壓試驗合格后按規定補口補傷。四、3PEanticorrosiveproductionprocess3PE管道防腐生產工藝流程4.1Thefollowing950mmpipelineanticorrosionprocess950mm以下管道防腐流程Bottom→spray→epoxypowder底層→噴涂→環氧粉末middlelevel→extrusioncladding→adhesive中層→擠出包覆→膠粘劑outersphere→extrusioncladding→PE外層→擠出包覆→PEPipesandblasting管道噴砂Pipelinethroughthelinesintothehigh-frequencyheatingtoheat,afterthegluemachineglue.管道經過流水線進入高頻加熱機進行加熱,經過涂膠機上膠。Highfrequencyheatingequipmenttopolyethyleneparticlesofmoltenpolyethylene高頻聚乙烯加熱設備將聚乙烯顆粒熔化Pipelinecoatingmachinetostartcoating3PE管道包覆機開始包覆3PEEnterthecoolingproductionline進入冷卻生產線Inletpipegrindingprocessing進入管口打磨處理Inspectionandidentificationofissuanceproceduresindicatedfactory檢查合格并注明標識發放出廠手續4.2Morethan950mmpipeline,welding,pipe,heatshrinkabletapeanticorrosiveprocess950mm以上管道、焊口、管件、熱收縮帶防腐流程五、3PEanticorrosivespecificproductionsteps3PE防腐具體制作步驟5.13PEpipelineanticorrosion3PE管道防腐Preparatoryprocess準備工序Accordingtotheproductiontasklistinthesteelpipespecifications,adjustalltransmissionlinesonbothsidesofthedrivingwheelofthedistanceandangle.De-rustingproductionlinepipebottomheightfrom540mm;3PEcoatingproductionlinepipeendawayfrom630mm.根據生產任務單中的鋼管規格,調整好所有傳動線兩側傳動輪的距離和角度。除銹生產線管底離地高度540mm;3PE防腐生產線管底離地630mm。AdjustthegoodadhesiveandPEextruderoffrontandrearposition.調整好膠粘劑和PE擠出機的前后位置。Adjustthepositionandangleofsiliconrubber.調整硅膠輪的位置和角度。Adjustthespraygunpositioninradialandpointtothepipeaxis,thedischargeneedleintothesteelpipesurfacedistance120-150mm.調整噴粉槍的位置在鋼管徑向并指向鋼管軸心,放電針針尖到鋼管表面的距離120-150mm。Sizeextruderintheplanstarted3hoursbeforethestartofheating.大小擠出機在計劃開工前3小時開始加熱。1hourbeforethestartofPErawmaterialpreheatinganddrying,thedryingtemperatureisnothigherthan80DEGc.計劃開工前1小時進行PE原料預熱烘干,干燥溫度不高于80℃。Checktheoperationconditionofequipment,givethetransmissionpartslubricatingoilfilling;thefasteningshaftcouplingscrews,crossshaftandtheexpansionjointstoaddenoughoil;inspectionofliftingmechanismpositionandlimitdevicereliability.檢查設備運行情況,給各傳動部位加注潤滑油；緊固傳動軸的聯結螺絲,給十字軸和伸縮節加足油；檢查升降機構的位置及限位器的可靠性。Anticorrosionepoxypowdercoating,adhesive,polyethylenetheirqualityshallmeetthespecifications,andthroughinspectionandacceptance.防腐用的環氧粉末涂料、膠粘劑、聚乙烯其質量應滿足規范要求,并經過檢查驗收。Barepipetube裸管上管Accordingtotheproduction,taskorderstopipetransporttubeontheplatform.根據生產任務單將鋼管轉運到上管平臺。Inspectionoftheappearancequalityofsteelpipe,toseeifthereareanyextrusiondeformation,scratchesandotherdefects,suchastimelytomakeamark,putitsmaterialunqualifiedareaorrepairarea.檢查鋼管的外觀質量,察看有無擠壓變形、碰傷等缺陷,如有及時作出標記,將其放到材料不合格區或修復區。Blastcleaning拋丸除銹Rustmustbecheckedandclearedbothinsideandoutsidethepipesurfacegreasydirt,burrs,attachmentandotherimpurities.除銹前必須檢查并清除鋼管內外表面的油污、毛刺、附著物等雜質。Pipesurfacetemperatureisbelow3℃steelpipemustbeheatedto40~60℃,thenthepipeuniformthroughthede-rustingmachine,de-rustinggradereachesGB/T8923-88standardSa2.5grade,theanchorlinestoadepthof50-75μM.鋼管表面溫度低于3℃時鋼管要加熱到40－60℃,然后將鋼管勻速通過除銹機,除銹等級達到GB/T8923-88標準的Sa2.5級,錨紋深度達到50－75μm。Rustafterplacementof4hoursormoreorreturnstainlesssteelpipesneedtorust.除銹后放置4小時及以上或返銹鋼管須要重新除銹。5.1.43PEtoppipe3PE上管Onthefronttubeinadeposition-managementplatforminspectionandremovalofsteelpipewithinnerandoutersurfaceoftheburr,dustandotherimpurities.Ifdefectstoreturnmaterialunqualifiedareaorrepairarea.上管前在存管平臺上檢查并去除鋼管內外表面的毛刺、灰塵等雜質。如有缺陷返回材料不合格區或修復區。Thepasteevenlyintheprotectivepaper<100mmwidth>,andonitsleftsideof10mmwidedon'tspreadthepaste;andthentheprotectivepaperformationattachedtothepipeend,notenosmearpastesideatadistanceofnozzleinner.將漿糊均勻涂抹在防護紙〔100mm寬上,并在其一側留10㎜寬不要涂漿糊；然后將防護紙平整貼附在鋼管管端,注意沒有抹漿糊的一側在距管口的內側。Thepipeintothepipepullingdevice,throughthetubeisputintothetransmissionlinesteelpipe;pipeandnozzledistanceascloseaspossibleto,payattentiontothegoodjoint.將管放到拔管器上,通過拔管器把鋼管放到傳動線上；上管時前后管口的距離盡量靠近,注意對好接頭。Beforethestartofproductionprocessinatimelyandcleardrivingwheelonthedust,debris.開工前和生產過程中及時清理傳動輪上的灰塵、雜物。5.1.5Intermediatefrequencyheating中頻加熱Startthecoolingwaterpressurepump,checkiftheheaterwateroutletpipeofthewatercoolingsystemineachcasewhetherthereisabnormal.起動冷卻水加壓泵,檢查中頻加熱器冷卻系統每個出水管的出水情況是否有異常。Startingthedriveline,steelpipetomoveuniformly.啟動傳動線,讓鋼管勻速前進。Startfrequencyheater,slowlyrotatingheatingpoweradjustmentknob,thesteeltemperatureto200-220℃,foratleast30minutesretestonce.啟動中頻加熱器,緩慢旋轉加熱功率調整旋鈕,將鋼管溫度加到200－220℃內,至少30分鐘復測一次。Afterworktostopandstartinreverseorder.工作完畢時停止過程與啟動順序相反。5.1.6Drydusting噴粉Afterheatingthesteelpipeintothespraybox,openthesprayingequipment;accordingtothepipesizeidentifyopenequipmentnumber.ThecoatingthicknesstoachievetherequirementsinTable1;coatingonthesurfaceofasteelpipetobeuniform.加熱后的鋼管進入噴涂箱后,打開噴涂設備,根據鋼管的大小確定打開的設備數量。使涂層厚度達到表1要求；涂層在鋼管表面要均勻。Apressureofnotmorethan0.1MPa,twopressuresshallnotexceed0.05MPa.一次氣壓不宜超過0.1MPa,二次氣壓不宜超過0.05MPa。Table1表1SteelpipeDN<mm>鋼管公稱直徑Epoxypowdercoating環氧粉末涂層<μm>Adhesivecoating膠粘劑涂層<μm>Minimumthicknessofanticorrosivecoating防腐層最小厚度〔mmOrdinarygrade普通級〔GStrengthengrade加強級〔SDN≤100＞80170-2501.82.5100＜DN≤2502.02.7250＜DN＜5002.22.9500≤DN＜8002.53.2DN≥8003.0Adhesive,PEwinding膠粘劑、PE纏繞Accordingtothepipesizeandthetransmissionlinespeedregulationofthespeedofextruder,cross-linkingagent,polyethylenethickness<coatingthicknessgaugetest>accordingtotable1control:根據鋼管的大小和傳動線的速度調節好擠出機的轉速,膠聯劑、聚乙烯層厚度〔用涂層測厚儀檢測按表1控制：Ensurethatthethicknessofthecoating,controlofseamwidthof15±5㎜.保證防腐層厚度,控制壓縫寬度15±5㎜。Afterworkintimetoclearupthepowder,spraygunandthepipeline,topreventfouling,prepareforthenextuse.工作完畢及時清理好出粉器、噴槍及管道,防止其結垢,為下次使用做準備。Intheanticorrosionlayerintermediateforbiddenhavingvoidsandbubbles.在防腐層中間嚴禁有空洞和氣泡產生。5.1.8Thecuttinghead、coolingandlowerpipe割頭、冷卻和下管FinishcoatingofsteelpipeinthecoolingmustbeclearedbeforeenteringonthejointofPElayerandcross-linkingagent.做完防腐層的鋼管在進入冷卻前必須清理掉接頭上的PE層及膠聯劑。Coolingwatertoslowlyandevenlyflowintothepipe,cannothavewatershockpoint.冷卻水必須緩慢均勻地流到鋼管上,不能有水激點產生。Controloftransmissionspeedinthepipe,tubeandpipebeforeundocking,timeoutjoint,preventthecardinthetransmissionlinesqueezebadsemi-finishedtubemadeofaccidents.控制好下管的傳動速度,在下管前脫開前后鋼管,及時取出接頭,防止卡在傳動線上擠壞半成品管造出成事故。Semi-finishedpipedowntotheplatformwhenacollisionbetweenbeforeandafterthepipeisstrictlyprohibited.半成品管下到平臺上時嚴禁前后鋼管之間碰撞。5.1.9Semi-finishedproductinspection半成品檢測Electricsparkdetectorbytherootofleakdetectionshouldbenoleakage;singletubehas2or2ofthefollowingpoints,makingmarkaccordingtotheprovisionsintheleakpatch;therearemorethan2orasinglepointintheaxialdirectionisgreaterthan300mmthetubeisnotqualified,exitpipeplatform,storedseparatelytopeelprocessing.用電火花檢漏儀逐根進行漏點檢測應無漏點；單管有2個或2個以下漏點時,在漏點處作出標記按規定修補；有2個以上或單個漏點在軸向大于300mm時該管為不合格,退出下管平臺,單獨存放進行剝皮處理。Usingmagneticthicknesstesterformeasuringcircumferencedirectionanduniformdistributionofthefourpointsofthethicknessofthecoating,theresultshallbeasspecifiedinTable1,eachsuccessivebatchshouldbecheckedatleastfirst,5,10steelanti-corrosionlayerthickness,aftereach10measuringatleastonce,ifthedeviationoftimelyfeedbacktotheoperationstation,inordertomakethecorrespondingadjustment.采用磁性測厚儀測量鋼管園周方向均勻分布的四點的防腐層厚度,結果應符合表1的規定,每連續生產批至少應檢查第1、5、10根鋼管的防腐層厚度,之后每10根至少測一次,如有偏差及時反饋給操作臺,以便作出相應的調整。Appearanceinspection,thepolyethylenelayersurfaceshouldbesmooth,nobubbles,noanesthesia,nowrinkles,nocrack,coloruniformity.外觀檢查,聚乙烯層表面應平滑、無暗泡、無麻點、無皺折、無裂紋,色澤應均勻。Coatingadhesiontest,every4hoursatleastattwotemperaturesmeasuredonceeachpumping.防腐層粘結力的檢測,每4小時至少在兩個溫度下各抽測一次。Coatingperformanceindicatorsareasfollows:防腐層性能指標如下：Pipeendtreatment管端處理Semi-finishedproducttestingqualifiedanticorrosiontubeorpipebevelingmachinetoberepaired,withremovaloftubeendpartsofthepolyethylenelayer,thepipeendreservedlength100-150mm.半成品檢測合格的防腐管或待修復管,用坡口機去除管端部位的聚乙烯層,管端預留長度100-150mm。Thepolyethylenelayerendchamferingisequaltoorlessthan300andahair.聚乙烯層端面倒角等于或小于300并打毛。Endofthetubeaftertreatmenttorepairpiperepair,repairaftercheckagainthepipeisqualified.對管端處理后的待修復管進行修復,修復完后再次檢查該管是否合格。Ifqualifiedtoenterthenextprocess,otherwiseexitpipeplatformindividuallystacked,peelingprocess.如果合格進入下道工序,否則退出下管平臺單獨堆放,進行剝皮處理。5.2.1Package、sprayandmarking打包、噴涂標識Qualifiedanticorrosiontubeinthelengthdirectionbinding4rope,eachlessthan10laps;fastened,cannotloosen;payattentiontostaggerthepositionofmarking.合格的防腐管在長度方向綁扎4道草繩,每道不少于10圈；綁扎緊固,不能松開；注意錯開標識位置。Inspectionofqualifiedanticorrosionpipefromthepipeendlocatedabout400mmmarkedontheproductmarks,includingthespecificationsofsteelpipes,pipenumber,anti-corrosion,anti-corrosionlayerstructuremodelnumber,gradeofanticorrosion,executivestandard,manufacturername,productiondate.檢驗合格的防腐管在距管端約400mm處標上產品標志,包括鋼管規格、鋼管編號、防腐編號、防腐層結構型號、防腐等級、執行標準、生產廠名、生產日期。Withqualificationcertificateincludingproductionfactoryname,address,productname,productspecifications,coatingstructure,rankofanticorrosioncoating,anticorrosivecoatingthickness,inspectornumber.隨帶的合格證包括生產廠名、廠址,產品名稱,產品規格,防腐層結構,防腐層等級,防腐層厚度,檢驗員編號等。5.2.2Finishedproducttransportstowage成品轉運堆碼Fromtheworkshoptransportfreightyardisforbiddenduringcollisiondraganticorrosionpipe.從車間轉運到貨場過程中嚴禁碰撞拖拉防腐管。Stackanticorrosionpipeatthebottomofthetwo<ormore>supportingpad,distanceis4-8M,supportingtheminimumwidthof100mm,anti-corrosionpipeatthebottomofthegroundshallnotbelessthan100mm.堆放時防腐管底部采用兩道〔或以上支墊墊起,間距為4-8m,支墊的最小寬度為100mm,防腐管底部離地面不得少于100mmExtrudedpolyethyleneanticorrosionpipestackinglayersshouldaccordwithtable2:擠壓聚乙烯防腐管堆放層數要符合下表2：3PEanticorrosionpipeopenstoragetimenotmorethanoneyear,morethanayearinopaquecoveringonanticorrosionpipetosupport.3PE防腐管露天存放時間不能超過一年,超過一年的要用不透明遮蓋物對防腐管加以護。Table2表2公稱直徑DN<mm>DN＜200200≤DN＜300300≤DN＜400400≤DN＜600600≤DN＜800DN≥800Stackinglayers堆放層數≤10≤8≤6≤5≤4≤3Heatshrinkabletapeanticorrosiveconcretesteps熱收縮帶防腐具體步驟6.1Constructionpreparation施工準備Personneltrainingandtechnicaldisclosure人員培訓、技術交底Anticorrosivematerialpurchasing、approachingandinspection防腐材料采購、進場報驗Anticorrosivespecialtoolpreparation防腐專用工具準備6.2Surfacetreatment表面處理Theuseofsandblastingequipmentforpipecleaning,thesandblastingprocess,pipesurfacetemperatureshouldbeabovethedewpointtemperature.Whentheweatheriswet,thefirststeelwasheatedto50℃andrust.SandblastingsurfaceshouldbeatleastSa2?Stage<metalsurfaceshouldbenovisibledirt,grease,scale,rustandpaintcoatingandotherattachments,anyresidualtracesshouldonlybespottedorstripedslightdiscoloration>,threadingdepthof50～90μM.使用噴砂設備對管口進行清理,在噴砂的過程中,管口表面的溫度應在露點溫度以上。天氣潮濕時,先將鋼管預熱到50℃再進行除銹。噴砂除銹后表面至少應達到Sa2?級〔金屬表面應無可見的油脂、污垢、氧化皮、鐵銹和油漆涂層等附著物,任何殘留的痕跡應僅是點狀或條紋狀的輕微色斑,錨紋深度50～90μm。Weldingmouthonbothsidesoftheanticorrosivelayerwhichslopes,andthesandclothorsteelwirebrushtothethermalcontractionbeltjointgrindingroughness.將焊口兩側的防腐層修成斜坡,并用砂布或鋼絲刷將熱收縮帶的搭接部位打磨粗糙。6.3Pipepreheating管體預熱Coatingprimer,withabaremetalsurfaceforpreheating.Inordertoensuretheentirecircumferenceoftheheatingpipeevenly,shouldberoastedguntofirethepipepreheating,preheatingtomaintainuniform,consistenttemperatureofsteelround.涂敷底漆前,應對裸露的金屬表面進行預熱。為保證管口整個圓周的均勻加熱,應將烤槍調到中火對鋼管進行烘烤預熱,預熱要均勻,保持鋼管四周溫度一致。Preheattemperatureat60～80℃,generalpreheatingtimenotlessthan5min,largerdiameterpipepreheatingtime.預熱溫度達到60～80℃,一般預熱時間不低于5min,管徑越大預熱時間越長。Withthermometeronsteelpipearoundthesamplingtemperaturemeasurement,temperaturemeasurementisnotdirectlyonthebaresteelmeasuring,shouldbeinthebaresteelpaintedalittleprimer,primerforsteelpipetemperaturemeasurementofactualtemperature.用測溫儀對鋼管四周取樣測溫,測溫時不要直接在裸鋼上測量,應在裸鋼上涂刷一點底漆,測量的底漆溫度為鋼管實測溫度。6.4Primercoating底漆涂敷=1\*GB3①Inthesteelpipepreheatingbeganthedeploymentofprimer<generaldoublecomponentratioofA:B=4:1orA:B=5:1>.在鋼管預熱時開始調配底漆〔一般雙組分的配比A:B=4:1或A:B=5:1。=2\*GB3②Paintshouldbeevenlymixed,inthewinteroftheprimercanbepreheateddeployment.底漆應混合均勻,冬季時底漆可以預熱后再進行調配。=3\*GB3③Usespecialbrushtobrushing2~3times,sothatathicknessgreaterthan100μmprimer.用專用刷子涂刷2～3遍,使底漆厚度大于100μm。6.5Thermalcontractionbeltinstallation熱收縮帶的安裝Theprimeriscompleted,withathermalshrinkagebeltcompletelywrappedpipe.Lapjointpipeslocatedinthesideof10or2points,atleastoverlapping100mm.在底漆涂刷完成后,用熱收縮帶完全包裹住管口。搭接位于管道一側10點或2點的位置,最少搭接100mm。Removingtheheatshrinkablebandonthepackaging,withsmallfiretoshrinkwithawiringaheadsurfacebakingmakeadhesivesurfaceshiny.Theheatshrinkabletapebakingagoodheadinparallelwiththepipelap,lapwidthshouldbeuniform,thermalcontractionbelttotightlyattachedonthesteeltube.除去熱收縮帶上的包裝物,用小火對熱縮帶有搭接線的一頭膠面進行烘烤使膠面發亮。把熱收縮帶烘烤好的一頭平行與鋼管搭接,搭接寬度要均勻,熱收縮帶要緊密地貼附在鋼管上。Thethermalcontractionbeltattheotherendoftheadhesivesurfaceroastedshiny,accordingtoaconnectionjoint,andapressingrollercompactionwithplasticsealseamlocatedin.將熱收縮帶另一頭的膠面用火烤發亮后,按搭接線進行搭接,并用壓輥壓實后用膠條封在對縫處。Withasmallfireontheadhesivestriponroast,thefixingsheetisdepositedintheheatshrinkablebandbutt.Withthefireonthefixedpiecegluesideedgesforbakingandrollercompaction.用小火對對縫上的膠條烘烤一下后,將固定片居中敷在熱收縮帶對縫處。用中火對固定片膠面的邊緣進行烘烤并用壓輥壓實。Thefixedpieceafterinstallation,2～3werefirstusedinthefiretubealongthecircumferentialdirectionofmobilebakingheatshrinkablebandintermediate<tworoastedgunflameshallnottouch>,thenbytheheatshrinkablebandcentertothesidemovingslowlybake.Thebakingprocess,theflamecan'tstayinoneplace,otherwiseeasytoburnthesubstrate.固定片安裝完后,2～3人先用中火沿管子周向方向移動烘烤熱收縮帶中間〔兩烤槍火焰不得碰到一起,再由熱收縮帶中間向兩邊慢慢移動烘烤。烘烤過程中,火焰不能停留在一個位置,否則容易烤糊基材。Thethermalcontractionaftercontraction,withsmallfire<>457mmdiametersteelpipeusedinthemediumfire>alongthepipeaxialdirectionareuniformlyheatingtemperature,untiltheadhesivealongtheheatshrinkablebanduniformlyoverflow.Therubberstripdepositedinthefixedendsofthetablets,withsmallfireroast,andputtyknifescoopcanbe.Installedthermalcontractionbeltcannotbedisturbed,untiltheadhesivehassolidified.待熱收縮帶收縮完后,用小火〔直徑大于457mm的鋼管用中火沿鋼管的軸向方向進行均勻補火升溫,直到膠粘劑沿熱收縮帶邊緣均勻溢出。將膠條敷在固定片兩端,用小火烘烤一下,再用膩子刀鏟平即可。安裝完的熱收縮帶不能擾動,直到粘結劑凝固為止。Duringconstruction,windmorethangrade2toinstallawindfacilities;whentheairtemperatureislower,tolengthenthebakingtime,andtheuseofinsulationequipmentforbakingfinishmendingforinsulation.施工時,風力大于2級要安裝擋風設施；氣溫較低時,要加長烘烤時間,并使用保溫設備對烘烤完的補口處進行保溫。6.6Surfaceinspection外觀檢查=1\*GB3①Fillthemouthshouldbesmooth,nowrinkle,bubbling,steelpipeanticorrosionlayerandthethermalcontractionbeltjointclosely,donotleavegaps.補口處應光滑平整、無皺折、鼓泡,鋼管防腐層與熱收縮帶貼合緊密,不留空隙。=2\*GB3②Thermalcontractionbeltcircumferentialduetoadhesiveuniformlyoverflow.Heatshrinkablesleevesurfaceshouldnotbeburned,thecarbonizationphenomenon.熱收縮帶周向應有膠粘劑均勻溢出。熱收縮套表面不應有燒焦、碳化現象。=3\*GB3③Thecontractionoftheheatshrinkabletapeandpipecoatingoflapwidthshallbenotlessthan50mm.收縮后的熱收縮帶與管體防腐層的搭接寬度應不小于50mm。6.7.Peelingstrengthtest剝離強度測試Fillthemouthofthepeelstrengthtest,shouldberepairedmouthfinishedafter24hours,whentesting,thepipebodytemperatureis10℃~35℃,ifthetemperatureistoolow,anticorrosivelayercanbeheatedtodetectiontemperaturetodetection.Intheopening,thepipepeelingstrengthshallnotbelessthan50N/cm;forheat-shrinkablematerialandrawsteelpipepolyethyleneanticorrosivelayerofthejointofpolyethylene,thepeelstrengthalsoshouldnotbelessthan50N/cm;thethreelayerstructurerepairing,strippingsurfaceprimershallbecompleteattachedonthesurfaceofasteelpipe.補口處的剝離強度測試,應在補口完成24h后進行,檢測時管體溫度宜為10℃~35℃,如現場溫度過低,可將防腐層加熱至檢測溫度后進行檢測。在補口處,對鋼管的剝離強度應不小于50N/cm；對于熱縮材料和原鋼管聚乙烯防腐層的搭接處,對聚乙烯的剝離強度也不應小于50N/cm；對三層結構補口,剝離面的底漆應完整附著在鋼管表面。Eachofthe100patchesextractedatleastamouth,suchasunqualified,shoulddoublespottingtest.Ifmoresamplingstillhasastandard,thesectionofpipelinerepairedmouthshouldberepaired.Peelingstrengthtestshallbetherepairedmouthclean,re-createanewpatch.每100個補口至少抽測一個口,如不合格,應加倍抽測。若加倍抽測仍有一個不合格,則該段管線的補口應全部返修。剝離強度試驗后應將該補口清除干凈,重新制作新的補口。Everypatcharetheapplicationofelectricsparkleakdetectorleakcheck,checkthevoltageof15KV.Ifthereisaleak,shouldberepairedmouthandleakdetectionuntilqualified.每一個補口均應用電火花檢漏儀進行漏點檢查,檢查電壓為15KV。若有漏點,應重新補口并檢漏,直到合格。6.8Morethan950mmpipelineandpipefittingconstructionprocessibid.950mm以上管道及管件施工工藝同上。Anticorrosivebandsfunctionasfollows:防腐帶性能指標如下：七Safetyattentions安全注意事項Theconstructionsitetoestablishfull-timeHSEsupervisor,responsibleforHSEmanagementandsupervision.Basedonfullparticipation,highlightthepeople-orientedthought;fullriskanalysisandevaluation,makingfeasiblepreventionormitigationmeasures.施工現場設立專職HSE監督員,負責HSE工作的管理和監督。立足全員參與,突出以人為本的思想；充分進行風險分析與評價,制定切實可行的預防或消減措施