The application and development status of polyurethane foam in various industries
The application and development status of polyurethane foam in various industries
Five Ways to Change the Development Mode of China's Polyurethane Prefabricated Insulation Pipe Manufacturers Industry
Five Ways to Change the Development Mode of China's Polyurethane Prefabricated Insulation Pipe Manufacturers Industry
Abstract:
Thepolyurethaneprefabricatedinsulationpipemanufacturerindustryisanimportantlivelihoodindustrywithsufficientmarketcompetitionandcloselyrelatedtopeople'slives.Ithasthecharacteristicsofsmallproducts,bigmarketandbigindustry.Inrecentyears,thepolyurethaneprefabricatedinsulationpipemanufacturerindustryhasachievedrapidandrapiddevelopment.Ithasbecometheproductionandprocessingcenter,procurementcenterandimportantinternationaltradedistributioncenterandsupplyplaceoftheworld'spolyurethaneprefabricatedinsulationpipemanufacturerandtheglobalpolyurethaneprefabricatedinsulationpipemanufacturer.However,asfarasthewholeindustryisconcerned,theimbalanceofdevelopmentisstillaprominentcontradictionintheindustry.Thereareproblemssuchasextensivedevelopmentmode,backwardequipmentandtechnology,excessofmediumandlow-endproducts,andinsufficienthigh-endproducts.Theindustryconcentrationislow,andthesmall,multi,scatteredandweakindustrystructureisstillthefocusofadjustmentinthefuture.Thetaskoftransformingthedevelopmentmodeofpolyurethaneprefabricatedinsulationpipemanufacturersisarduous.Tosumup,itisnecessarytoachievefivemajorchanges.1.Fromextensivetointensive.Changetheoriginalindustrysmall,multi,weak,scatteredstatus,improveproductprocessingcapabilities,enhancemanufacturingequipment,technology,createbrands,andtakeanintensivedevelopmentpath.Thecoreofextensivetransformationtointensivetransformationistoimproveproductprocessingcapabilityandqualitylevel,andtotaketheroadofindependentinnovationandindependentbranddevelopment.2.Fromlabor-intensivetotechnology-intensive. Labor-intensiveindustriescanalsointroducetechnologiessuchasmodernelectronicinformationintotheindustry.Therearemanyvarietiesofhardwareindustry,eachwithitsowncharacteristics,takingtechnology-intensiveroads,increasingproducttechnicalcontent,addedvalue,anddeepdevelopmentinthehigh-endmarket. 3.Theexpansionofthesimplefreightelevatorfromthequantitytothequalitativeimprovement.Atpresent,thestatusquoofproducthomogenizationandlow-levelrepetitivelaborintheindustryhasnotbeenimproved.Torealizethetransitionfromalargeproducingcountrytoastrongproducingcountry,itisnecessarytoovercomethecurrentsituationofexcessivelow-endproductsandinsufficienthigh-endproducts.4.Changefromlowcostandlowpricetohighaddedvalueandhighprofitrate.Thelow-pricecompetitionbetweenpeersisanactthatharmstheindustryandlosesbothsides.Inordertocompeteintechnology,theindustryshouldstartwiththeconnotationandaddedvalueoftheproductitselftogainthefavorofthemarket,soastomaintainanorderlyandhealthyecologicalenvironment.5.ExportswillfocusonOEMsandgraduallyincreasetheproportionofindependentbrands.Itisnecessarytofurtherstrengthentheunloadingplatformtoconsolidateandexpandtheinternationalmarket,increasethedevelopmentofthedomesticmarket,walkontwolegs,andpayequalattentiontobothdomesticandforeignmarkets.OEMproductionismainlythree-pointandone-lineorders,processinganddelivery,lackingmarketleadingpowerandbargainingpower.Therefore,itisnecessarytoestablishindependentbrands,graduallyincreasetheproportionofindependentbrandexports,andenhanceinternationalcompetitiveness.
Polyurethane direct buried insulation pipe manufacturing industry has developed rapidly in China
Polyurethane direct buried insulation pipe manufacturing industry has developed rapidly in China
Abstract:
ThedirectburialofpolyurethanedirectburiedthermalinsulationpipesinrecenttenyearshasbeenrapidlydevelopedinChina,andhasbecomethemainlayingmethodofheatingpipenetwork.Thedirectburialoftheso-calledpolyurethanedirectburiedinsulationpipeistodirectlyburythepolyurethanedirectburiedinsulationpipeinthesoilwithouttheneedtolaypipesintheconstructiontrench.Comparedwithtrenchlaying,directburiedpolyurethaneinsulationpipehasthefollowingadvantages:1.Thereisnoneedtobuildtrenches,theamountofearthworkandcivilengineeringissmall;thepipelineisprefabricated,theamountofon-siteinstallationissmall,andtheconstructionprogressisfast,sotheinvestmentcostoftheheatingpipenetworkcanbesaved.2,smallfootprint,easytocoordinatewithotherundergroundpipelinesandfacilities.Thisadvantageismoreobviouswhentheoldcityarea,thestreetsarenarrow,andtheundergroundpipelinesaredenselypacked.3,polyurethanedirectburiedinsulationpipeistight,waterisdifficulttoinfiltratebetweentheinsulationmaterialandthesteelpipe,thepipeisnoteasytocorrode.Accordingtoforeignmaterials,itisbelievedthattheservicelifecanbeguaranteedformorethan50years,whichismuchhigherthanthatofthetrench.4.Asathermalinsulationmaterial,polyurethanehasasmallthermalconductivity,andtheheatlossoftheheatingpipeislessthanthatofthetrench,andtheheattransferefficiencyishigh.5,polyurethanedirectburiedinsulationpipestructureissimple,factoryprefabrication,easytoensurethequalityoftheproject.ItispreciselybecauseoftheabovevariousreasonsthatthepolyurethanedirectburiedinsulationpipemanufacturingindustryhasdevelopedrapidlyinChina,andtherewillbemoreroomfordevelopmentinthefuture.Duringthe"TwelfthFive-YearPlan"period,theannualdemandcompoundgrowthrateofdirectlyburiedthermalinsulationpipesisexpectedtoexceed60%.ThedemandforChina'sexternalwallinsulationmarketwilleruptinthenextthreeyearsorwillraisetheglobalMDIindustryoperatingrateto83%.Thedirectburiedinsulationpipematerialexcelsinheatinsulation,waterabsorptionresistance,tensilestrengthandcompressionresistance.Weexpectthattheproportionofdirectburiedinsulationpipeininsulationmaterialswillincreasefrom10%in2011to36%in2015.Theannualcompoundgrowthrateisexpectedtoexceed60%. Theexternalwallinsulationmarketfrom2011to2015isexpectedtobringabout500,000tonsofnewdemandforMDI(thedemandfor2011-2015is3,5,8,13,210,000tonsrespectively) TheoutbreakofdemandforChina'sexternalwallinsulationmarketwillacceleratetheglobalMDIindustry'soperatingrateinthenextthreeyears.Itisexpectedthattheglobalindustryoperatingratewillincreasefromthecurrent74%to83%by2015,andtheindustry'supwardtrendwillbestrengthened.Webelievethattheexternalwallinsulationindustrywillusherinanexcellentdevelopmentopportunity.Thedirectburiedinsulationpipeisexpectedtoresumeexplosivegrowth,andtheannualdemandcompoundgrowthratewillexceed60%.
Polyurethane foam insulation spiral steel pipe manufacturers shape industry quality and open the market with quality
Polyurethane foam insulation spiral steel pipe manufacturers shape industry quality and open the market with quality
Abstract:
HebeiLongduPipelinelearnedthatpolyurethanefoaminsulationspiralsteelpipemanufacturersshapethequalityoftheindustrytoopenthemarketwithquality PrefabricateddirectburiedinsulationpipeismoreconvenientandsafetoapplyWhatcanbedonetobetterplaytheroleofprefabricateddirectburiedinsulationpipe?Ofcourse,itiseasytouseandsafe.Today,Xiaobianwillcometotellyouaboutit.Inadditiontothehigh-temperatureprefabricateddirect-buriedinsulationpipesproducedoutsideChina,thereareleakalarmlines.Oncethepipelineleakssomewhere,thetransmissionofthealarmlinecanshowtheaccurateleakageofwaterandwaterleakageonthespecialinspectioninstruments.Thelocationandthedegreeofleakage,inordertoinformtheinspectingpersonneltoquicklydealwiththeleakingpipesectiontoensurethesafeoperationoftheheatingpipenetwork.Thedomesticallyproducedinsulationpipeiscurrentlyequippedwithaleakagealarmline,andtheprefabricateddirectburiedinsulationpipeneedstobefilledwiththisblank.Thehigh-temperatureprefabricateddirect-buriedinsulationpipenotonlyhastheadvancedtechnologyandpracticalperformancethatisdifficulttocomparewiththetraditionaltrenchandoverheadlayingpipeline.Thehigh-temperatureprefabricateddirect-buriedthermalinsulationpipeiscomposedofsteelpipe,FRPinnersheathandglassfiberreinforcedplasticshell,andischaracterizedby:hightemperatureresistanceInsulationinsulationlayer,leakagealarmline:Whenmanufacturinghightemperatureprefabricateddirectburiedinsulationpipe,intheinsulationlayerclosetothesteelpipe,theprefabricateddirectburiedinsulationpipeisburiedwithanalarmline.Oncethepipeleakssomewhere,thetransmissionthroughthealarmline,Itcanalarmonthespecialdetectioninstrumentanddisplaytheexactpositionofthewaterleakageandthedegreeofleakage,soastoinformthemaintenancepersonneltoquicklyhandletheleakingpipesectionandensurethesafeoperationoftheheatingnetwork.Lubricatinglayer,elasticseal.Theutilitymodeleffectivelysolvestheproblemofheatpreservation,slidinglubricationandwaterproofingoftheexposedpipeendoftheprefabricateddirectburiedthermalinsulationpipeforthehightemperatureheattransferof130°C-600°Cinurbancentralheating.Prefabricateddirectburiedinsulationpipealsohassignificantsocialandeconomicbenefits,andisalsoapowerfulmeasureforheatingenergy.TheadoptionofdirectburiedheatingpipelinetechnologyindicatesthatthedevelopmentofChina'sheatingpipelinetechnologyhasenteredanewstartingpoint.Withthefurtherimprovementanddevelopmentofthisadvancedtechnology,itisimperativetodirectlyreplacethetrenchandoverheadoftheheatingpipeline.Withtheexpansionoftheapplicationrangeofprefabricateddirectburiedinsulationpipes,peoplehavebeguntopayattentiontohowtouseitmoresafelyandconveniently.Now,ifyourememberthesmallseries,youcanusetheprefabricateddirectburiedinsulationpipe. Pre-madedirectburiedinsulationpiperepairingsiteconstructionproblemanswerIntheconstructionprocessofprefabricateddirectburiedinsulationpipe,themostdifficultanddifficultproblemistheconstructionofprefabricateddirectburiedinsulationpipe.However,manyconstructionworkersarenotsurehowtodealwithunexpectedproblems.Today,RongbangxiaoEditedtoanswertheon-sitetreatmentmeasuresforsomeproblemsthatoftenoccurattheconstructionsite. 1.Whatarethemethodsforon-sitefillingofdirect-buriedplasticsleevesteelprefabricatedinsulationpipe?Themainfunctionofthemouthistotightlyconnectthegaptothemothertubetoachievethepurposeofsealingandwaterproofing.Thefollowingtwomethodsarerecommended:1diameterlessthan500mm,sleevesleevefillingmethod,whichiseasytooperateandlowincost;2diametergreaterthan500mm,usingelectricheatingsleevetofillthemouth,althoughthecostishigher,buttheprojectThequalityismoreguaranteed. 2.Howtocarryouton-siteoperationwithsleeves?Sleevesleevesareusuallydeterminedbasedonthetypeoftheparenttubeandthelengthofthemouth.Generallyspeaking,thediameterofthesleevetubeislargerthanthatofthemothertube,andthelengthisabout20-30cmlongerthanthelengthofthemouth.Forexample:thelengthofthe180mmdiameterinsulationtubeis30cm,andthesleevetubeisusually190mmindiameterand50-60cminlength.Specificoperationsteps:1Beforethesteelpipeiswelded,putthesleevesleeveintothetube.Afterthesteeltubeiswelded,slidethesleevetubetothemouth.Thebalanceatbothendsisaboutthesame.Bothendsaresealedwithheatshrinkabletape.2Openatoneendofthesleevetube.A30mmdiameterinjectionholeandthesameendofthesamesizeventhole,thepolyurethanematerialisevenlypouredorinjectedwithacastingmachine,afterthefoamingiscompleted,itcanbesealedwithaspecialplug. 3.Howtousetheelectricheatingsleevetorepairthemouth?Firstselecttheappropriateelectricheatingjacket(usually200-500mmcircumferenceislargerthantheouterprotectivetube),anduseaspecialelectrichot-meltweldingmachinetoheatthesurroundingpresetheatingwire,usuallyfor20-40minutes(determinetheheataccordingtothematerial)Aroundthemeltingtime),thehot-meltsleeveisbondedtothemothertube,andthenthesecondstepofthesleevesleevefillingmethodisusedforinjection,andthespecialblockagecanbeusedforsealing. 4.Straight-buriedplasticsleevesteelprefabricatedinsulationpipejointmaterial,isitfeasibletouseglassfiberclothandglassfiberreinforcedplasticpaint?No.Becauseglas
Polyurethane insulation pipe market demand is increasing
Polyurethane insulation pipe market demand is increasing
Abstract:
China'spipelinemarketdemandisgrowingandgrowingrapidly.Theemergenceofthissituationismainlycausedbythefollowingreasons:1.Chinapromotestheneedsofenergyconservationandenvironmentalprotectionpoliciessuchas“centralheating”,“cogeneration”and“triplesupply”;2.AcceleratingandmodernizingcivilizedurbanconstructionHighrequirementsforenergyconservationandenvironmentalprotection;3.Inordertoimprovethequalityoflifeofthepeople,thecountry'sheatingrangeextendsfromthesevere“threenorth”areas(ieNorthChina,NortheastChina,NorthwestChina)tothe“transitionarea”ofthevastwinter,coldandhotsummer.demand.Wehavemadegreatprogressinresearch,development,application,etc.:Inordertomeettherapiddevelopmentofthedirectburiedsteampipeline,China'svastnumberofscientificandtechnicalpersonnel,manufacturersinthedirectburiedsteampipelinetechnologyresearch,development,application,etc.,paidAlotofhardworkhasmadegreatprogress.Thevarietyofinsulationstructureandselectionofmaterials,thescaleofengineeringpractice,nocountryintheworldcancomparewithus. Germany,Brugge,Soksam,ItalyandtheUnitedStatesandothercompanies,theirgeneraldiameterΦ500mm,theamountisnotlarge,andcurrentlyChina'sShandongJinan,HebeiShijiazhuang,ShaanxiXi'an,LiaoningDalian,Henan,JiangsuandZhejiangandotherregionsThedirectburiedsteampipelinehasexceededΦ500mm,andsomehavereachedΦ900mm.Thethermalinsulationstructurehasinternalslidingandexternalsliding.Theselectedhigh-resistancematerialsincludemicroporouscalciumsilicate,glasswoolshell,hotpressedperlite,siliconbeadinsulationmaterial,andcompositesilicate.Insulationstructuretype,therearemanytypesofinsulationmaterials.Therefore,inthefieldofdirectburiedsteampipelinedevelopmentandapplication,Chinaisnolessdevelopedthanthedevelopeddirectburiedthermalinsulationpipefromthetransportmediumsteelpipe,polyurethanerigidfoamplasticinsulationlayerandglassfiberreinforcedplasticoutersheath(glassfiberreinforcedplastic)tightlycombined.Ithasgoodmechanicalstrengthandexcellentcorrosionresistance.Thefirstlayer:workingsteelpipelayer,accordingtothedesignandcustomerrequirements,generallyuseseamlesspipe(GB8163)spiralweldedpipe(GB9711;SY/T5038)andstraightseamweldedpipe(GB3092).Afterthesurfaceofthesteelpipeistreatedbyadvancedshotblastinganddescalingprocess,therustremovalgradeofthesteelpipecanreachSa2gradeinGB8923-standard,andthesurfaceroughnesscanreachR=12.5microninGB6060.5standard.Afterthesurfaceofthesteelpipeisdecontaminatedandrusted,alayerofanticorrosivematerialisapplied.Thefirstfunctioniswaterproofing,andtheotheristoimprovethebondingsurfacebetweentheheatinsulatinglayerandthesteelpipetoformawhole. Thesecondlayer:apolyurethaneinsulationlayer,whichisformedbyinjectingarigidpolyurethanefoamrawliquidintoacavityformedbetweenthesteelpipeandthespecialsteelmoldbyahigh-pressurefoamingmachine.Thatiscommonlyknownasthe"moldfoamingprocess."Whetherthepolyurethanefoamisfullornot,thereareanyqualityproblemsfordirectinspection.Itsroleistowaterproof,buttokeepwarm,andthethirdistosupporttheweightoftheheatingnetwork.Whenthetemperatureoftheconveyingmediumis:-50°C-120°C,therigidpolyurethanefoamisusedastheinsulatinglayer;whenthetemperatureoftheconveyingmediumis-50°C-150°C,therigidpolyurethaneisused.Thefoamismadeofinsulation. Polyurethanedirect-buriedinsulationpipe,alsoknownas"tube-in-pipe",consistsofa"two-stepprocess"consistingofahigh-densitypolyethyleneouterprotectivelayer,apolyurethanerigidfoamplasticpipeandasteelpipe.Theinsulationlayermaterialisarigidpolyurethanefoamwithadensityof60kg/m3to80kg/m3,whichfullyfillsthegapbetweenthesteelpipeandthecasing,andhasacertainbondingstrength,sothatthesteelpipe,theoutercasingandtheheatinsulationlayerarebetweenthethree.Formasolidwhole.Polyurethanedirect-buriedinsulationtubefoamhasgoodmechanicalpropertiesandthermalinsulationproperties.Generally,itcanwithstandtemperatureof120°Cbymodificationorcombinationwithotherinsulationmaterialstowithstandtemperatureof180°C.Outlinedtoadapttourbandistrictheatingandwork. Polyurethaneinsulationdirectburiedpipeshavebecomearelativelymatureadvancedtechnologyinsomedevelopedcountries.Inthepasttenyears,China'sheatingengineeringtechnicianshavepromotedthedevelopmentofdomesticpipenetworktechnologytoahigherlevelbydigestingandabsorbingthisadvancedtechnology.Thepracticeresultsinmorethantenyearshavefullyprovedthatthelayingmethodofpolyaminecheeseinsulationdirectburiedpipehasmanyadvantagescomparedwiththetraditionaltrenchandoverheadlaying.Thedirectburiedheatpreservationpipeismadeupofasteelpipeconveyingmedium,ahigh-densitypolyethyleneoutercasing,andarigidpolyurethanefoaminsulationlayerbetweenthesteelpipeandtheoutercasing.ThisisalsothepolyaminecheeseinsulationdirectlyburiedpipeinChina'sheatingproject.
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