Kwa zaka zambiri, msika waukulu wa mapaipi amadzi ( mainchesi 16 ndi kupitilira apo) umayimiridwa ndi chitoliro cha Steel Pipe (SP), Precast Concrete Cylindrical Pipe (PCCP), Ductile Iron Pipe (DIP) ndi PVC (Polyvinyl Chloride).Kumbali ina, chitoliro cha HDPE chimangotengera 2% mpaka 5% ya msika wawukulu wamapaipi amadzi.
Nkhaniyi ikufuna kufotokoza mwachidule nkhani zachidziwitso zomwe zimagwirizanitsidwa ndi mapaipi akuluakulu a HDPE ndi malingaliro ogwirizanitsa mapaipi, zopangira, kukula, kupanga, kuyika, ndi kukonza.
Malinga ndi lipoti la EPA, nkhani zachidziwitso zozungulira mapaipi akulu a HDPE amafika pamfundo zazikulu zitatu.Choyamba, pali kusowa kwa chidziwitso cha mankhwala.M'mapulojekiti am'matauni, kuchuluka kwa omwe akuchita nawo gawo kumatha kusokoneza kusamutsa chidziwitso pazinthu zogwirizana.Momwemonso, antchito nthawi zambiri amagwiritsa ntchito zinthu zodziwika bwino komanso matekinoloje.Pomaliza, kusowa chidziwitsoku kungayambitsenso malingaliro olakwika akuti HDPE siyoyenera kugwiritsa ntchito madzi.
Vuto lachiwiri lachidziwitso limachokera ku lingaliro lakuti kugwiritsa ntchito zipangizo zatsopano kumawonjezera chiopsezo, ngakhale chidziwitso china chilipo.Ogwiritsa ntchito nthawi zambiri amawona HDPE ngati chinthu chatsopano cha ntchito yawo yeniyeni, kunja kwa malo awo otonthoza chifukwa alibe chidziwitso nawo.Dalaivala wamkulu amafunikira kukopa zida kuti ayese zida zatsopano ndi kugwiritsa ntchito.Ndizosangalatsanso kwambiri.
Njira yabwino yothanirana ndi mavuto omwe akuwaganizirawa ndikuthandizira kuwerengetsa zoopsa zomwe zikuyembekezeka ndikuwonetsa mapindu owerengeka ogwiritsira ntchito zida zatsopano.Komanso, zingakhale zothandiza kuyang'ana mbiri ya zinthu zofanana zomwe zimagwiritsidwa ntchito.Mwachitsanzo, magetsi achilengedwe akhala akugwiritsa ntchito mapaipi a polyethylene kuyambira pakati pa zaka za m'ma 1960.
Ngakhale ndizosavuta kuyankhula za thupi ndi mankhwala a mapaipi a HDPE, njira yabwino yothandizira kuwerengera mapindu ake ndi kufotokoza momwe zimakhalira poyerekezera ndi zida zina zamapaipi.Pakufufuza kwa zida 17 zaku UK, ofufuza adafotokoza kuchuluka kwa kulephera kwa zida zosiyanasiyana zamapaipi.Kulephera kwapakati pa ma 62 mailosi kumachokera ku zolephera za 20.1 pamtunda wapamwamba wa chitoliro chachitsulo mpaka kulephera kwa 3.16 kumapeto kwa chitoliro cha PE.Chinthu china chochititsa chidwi cha lipotili ndi chakuti zina mwa PE zomwe zimagwiritsidwa ntchito m'mapaipi zinapangidwa zaka zoposa 50 zapitazo.
Masiku ano, opanga PE amatha kupanga zida zolimba za polima kuti zithandizire kukula kwapang'onopang'ono, kulimba kwamphamvu, ductility, kupsinjika kwa hydrostatic, ndi zinthu zina zapaipi.Kufunika kwa kuwongolera kumeneku sikunganenedwe mopambanitsa.M'zaka za m'ma 1980 ndi 2000, kafukufuku wokhudzana ndi kukhutitsidwa ndi makampani othandizira ndi mapaipi a PE adasintha kwambiri.Kukhutira kwamakasitomala kudapitilira 53% m'ma 1980, kukwera mpaka 95% m'ma 2000.
Zifukwa zazikulu zosankhira zida za chitoliro cha HDPE pamakina akuluakulu otumizira ma mainchesi amaphatikiza kusinthasintha, malo olumikizirana, kukana kwa dzimbiri, kuyanjana ndi njira zaukadaulo zopanda trenchless monga kubowola kopingasa, komanso kupulumutsa mtengo.Pamapeto pake, zopindulitsazi zitha kuchitika pokhapokha njira zomangira zoyenera, makamaka kuwotcherera kwa fusion, zikutsatiridwa.
Zolemba: https://www.rtfpipe.com/news/large-diameter-hdpe-pipe-for-municipal-piping-systems.html
Nthawi yotumiza: Jul-31-2022
