Muva nje, bengikhuluma namakhasimende amaningana asebenza nobunjiniyela bamapayipi. Ngibona ukuthi lapho kukhethwa ipayipi langaphakathi, bahlala bekhathazekile ngalo mbuzo: Ipayipi Elinentambo yePolyurethane kanyeIpayipi Elinemiphetho Ye-Polypropylene, iyiphi engcono? Zonke izinto eziyisisekelo ziyi-Spiral Seam Welded Pipe, kodwa izinto zokwakheka kwangaphakathi zihlukile, futhi ukusebenza kanye nentengo kuhlukile kakhulu.
Namuhla, ngokuthatha isibonelo sangempela seCangzhou Spiral Steel Pipe Factory, ngizoyicacisa kahle le ndaba.
Ake siqale nge-substrate. Lesi yisisekelo.
Kungakhathaliseki ukuthi ulwelwesi lwangaphakathi lwenziwe nge-PU noma i-PP, isisekelo sihlala sikhonaIpayipi Elihlanganisiwe Lomthungo Ojikelezayo. Kunabakhiqizi abaningi eCangzhou abakhiqiza lo mkhiqizo, kodwa yiCangzhou Spiral Steel Pipes Group Co., Ltd. kuphela engafinyelela izinga elikhulu. Le nkampani yasungulwa ngo-1993, ihlanganisa indawo engamamitha-skwele angu-350,000 eCangzhou, enempahla eyizigidi ezingama-yuan ezingu-680 kanye nabasebenzi abangu-680. Ingakhiqiza amathani angu-400,000 amapayipi ensimbi ajikelezayo ngonyaka, anenani lokukhipha elingu-1.8 billion yuan - lesi silinganiso sibalulekile embonini yasekhaya.
Kodwa okunquma ngempela isikhathi sokuphila kwephayiphi uhlelo lokumboza olunezingqimba ezintathu.
Abantu abaningi bagxila kuphela kulwelwesi lwangaphakathi, kodwa abazinaki izinyathelo ezintathu ezibalulekile: i-primer, i-glue, kanye ne-outer anti-corrosion layer. Ake sibheke kuzo ngasinye ngasinye.
Isendlalelo 1: I-Epoxy Resin Primer
Lokhu kufafazwa ngesimo sempuphu futhi ubukhulu bako akumele bube ngaphansi kwama-micrometer angu-60. Ungawuthathi kalula lo ngqimba oluncane. Lunesibopho sokubopha ne-substrate yepayipi lensimbi. Uma i-primer ingenziwanga kahle, noma ngabe inamathele kakhulu phezulu, ngeke ibe usizo.
Isendlalelo sesibili: i-PE adhesive
Lolu ngqimba lungafuthwa noma lukhishwe. Ubukhulu obuncane bungama-micrometer angu-140. Kukhona imininingwane yobuchwepheshe okufanele iqashelwe lapha: Izidingo zamandla okukhuhla kwezinqubo zokufutha ngempuphu kanye nokukhipha zihlukile. Uma uthenga, qiniseka ukuthi ubuza umhlinzeki ukuthi iyiphi inqubo ayisebenzisayo. Ngaphandle kwalokho, uma uyikhipha endaweni, izokhuhla isikhumba, okungaba inkinga.
Isendlalelo sesithathu: Isembozo sangaphandle se-polyethylene
Lolu ungqimba luwugqinsi kakhulu futhi lwakhiwa ngokusila noma ngokulukhipha ngepayipi noma ishidi. Ngemva kokumboza, kumele lupholiswe; ngaphandle kwalokho, luzoshintsha uma lucindezelwa ngesikhathi sokuthuthwa. Ubukhulu bemboza buzohluka kuye ngobubanzi bepayipi. Uma ipayipi lizongcwatshwa ngaphansi komhlaba noma lithwalwe imithwalo emikhulu yemishini, ubukhulu bengqimba obuncane kufanele bukhuliswe ngamamilimitha angu-0.7 engeziwe. Inani elithile livame ukunikezwa etafuleni ngumenzi, futhi ungakhetha kalula ngokusho kwalo.
Buyela embuzweni wokuqala: i-PU lining noma i-PP lining?
Kalula nje, nansi iseluleko esisekelwe kokuhlangenwe nakho: Amapayipi afakwe nge-polyurethane anokumelana nokuguguleka okungcono futhi afanelekela ukuthutha izinto eziqukethe izinhlayiya eziqinile, njenge-slurry namanzi angcolile;Amapayipi afakwe i-polypropylenezinamandla okumelana nokushisa kanye nokugqwala kwamakhemikhali, futhi zilungele ukusetshenziswa kwamakhemikhali kanye nezimo zokushisa okuphezulu.
Uma isabelomali sephrojekthi sivuma, kungenzeka futhi ukuxhumana nomkhiqizi ukuze kuthuthukiswe ikhambi elihlanganisiwe. Kodwa-ke, imfuneko iwukuthi ikhwalithi yezinto eziyisisekelo kanye noqweqwe olunezingqimba ezintathu olulwa nokugqwala lwe-Spiral Seam Welded Pipe kumele kube ngokwejwayelekile. Isizathu sokuthi kungani i-Cangzhou Spiral Steel Pipe Factory ikwazile ukuma iqine kule mboni iminyaka eminingi kangaka, empeleni, ukuthi ilawula yonke inqubo ngokwayo - ukugoqa izinto eziyisisekelo, ukufaka uqweqwe, nokuhlanganisa ulwelwesi lwangaphakathi - okuthembeke kakhulu kunokuthembela kubaphakeli abahlanganisa imikhiqizo yabo.
Ayikho impendulo eqondile "efanele" lapho ukhetha ipayipi, kodwa kunezindlela ezifanele. Ngiyethemba ukuthi lesi sihloko singakusiza ugweme ezinye izindlela ezingadingekile lapho ukhetha phakathi kwe-PU ne-PP.
Isikhathi sokuthunyelwe: Meyi-28-2026