[Tsananguro Yakazara] Polyethylene ipurasitiki, inozivikanwa nehukuru hwayo, kuchinjika kwayo uye kugadzikana kwayo kwemakemikari. Yakanakira kushandiswa kwepombi dzekumanikidza uye dzisina kumanikidzwa. Mapaipi eHDPE anowanzo gadzirwa ne polyethylene 100 resin, ine huwandu hwe930-970 kg/m3, inova kanomwe kupfuura simbi.

Polyethylene ipurasitiki, inozivikanwa nehukuru hwayo, kuchinjika kwayo uye kugadzikana kwayo kwemakemikari. Yakanakira kushandiswa kwepombi dzekumanikidza uye dzisina kumanikidzwa. Mapaipi eHDPE anowanzo gadzirwa ne polyethylene 100 resin, ine huremu hwe930-970 kg/m3, inova ka7 kupfuura simbi. Mapaipi akareruka ari nyore kutakura nekuisa. Polyethylene haikanganisike ne electrochemical corrosion process, uye zvakajairika kuti mapaipi asanganiswe nemunyu, acid uye alkali. Nzvimbo yakatsetseka ye polyethylene tube haizokanganisike, uye kukweshana kwacho kwakaderera, saka chubhu yepurasitiki haikanganisike nyore nekukura kwezvipembenene. Kugona kudzivirira kukuvara kwengura uye kuyerera kwakasimba kunoita kuti zvinodiwa zvekuchengetedza mapaipi eHDPe zvive zvishoma. Polyethylene pipe inogona kugadzirwa ne resin yakasimbiswa, yakarongwa sePE100-RC, uye inowedzerwa kuti ideredze kukura kwekuputika. Mapaipi anogadzirwa anogona kuva nehupenyu hurefu hwebasa, uye polyethylene ine mukana wehupfumi muhupenyu hwepurojekiti.

Zvino zvazvaonekwa kuti mapombi eHDPe anogara kwenguva refu, kukosha kwemari kwakakosha zvikuru kana mapaipi epolyethylene achishandiswa mukuchengetedza mvura. Kana tichienzanisa nemapombi esimbi ane ductile, mukana uri pachena wemapombi epolyethylene ndewekuti anogona kudzivirira kubuda kwemvura. Kune mhando mbiri dzekubuda kwemvura mumapaipi: kubuda kwemvura mumajoini, kubuda kwemvura nekuputika uye kubuda kwemvura mumabhonzo, izvo zviri nyore kubata.

Saizi yePombi yeHDPEHuremu hwayo huri pakati pe1600 mm ne3260 mm, uye mapaipi makuru ari kutengeswa parizvino anogona kushandiswa. Kuwedzera kune masisitimu emvura emakanzuru, mapaipi epurasitiki ane dhayamita hombe akagadzirwa nepolyethylene anogona kushandiswawo munzvimbo dzekuchenesa mvura yegungwa uye munzvimbo dzekuchenesa mvura yakasviba. Mapaipi ane dhayamita hombe anogona kuva kubva pa315 cm kusvika 1200 cm. Huremu hombePombi yeHDPeYakasimba uye yakavimbika. Mushure mekuvigwa muvhu, inogona kushanda kwemakumi emakore uye haidi kugadziriswa zvakanyanya, saka yakakodzera kushandiswa pakuchenesa mvura yakasviba. Kugara kwenguva refu kwepombi yepolyethylene kunowedzera sezvo saizi yayo ichiwedzera, zvichiratidza kushanda kwakanaka kwekudzivirira kudedera. Semuenzaniso, kudengenyeka kwenyika kwakaitika kuKobe muna 1995 muJapan, zvivakwa zvemaguta; mamwe mapaipi ese anokundikana kanenge kamwe chete pamakiromita matatu, uye sisitimu yese yemapaipi eHDPE haina kukundikana.

Zvakanakira zvepaipi yeHDPE: 1. Kugadzikana kwakanaka kwemakemikari: HDPE haina polarity, kugadzikana kwakanaka kwemakemikari, haibereke algae nemabhakitiriya, haikwire, uye chigadzirwa chisina njodzi kune zvakatipoteredza. 2. Simba rakanaka rekubatanidza: shandisa socket electric fusion kana butt joint thermal fusion, ine majoini mashoma uye isina kubuda. 3. Kudzivirira kuyerera kwemvura kwakaderera: Pamusoro pemukati mePombi yeHDPeyakatsetseka, ine mwero wekudzivirira kusakara uye kuyerera kukuru. 4. Kudzivirira kwakanaka kukupisa kwakaderera uye kusakara: tembiricha yekusakara iri (-40), uye matanho ekudzivirira akakosha haadiwi pakuvaka tembiricha yakaderera. 5. Kudzivirira kwakanaka kwekusakara: Kuyedzwa kwekuenzanisa kwekudzivirira kwekusakara kwemapombi epolyethylene nemapombi esimbi kunoratidza kuti kudzivirira kwekusakara kwemapombi epolyethylene kwakapetwa ka4 pane kwepombi dzesimbi. 6. Kudzivirira kukwegura uye hupenyu hurefu hwebasa: Pombi yeHDPE inogona kuchengetwa kana kushandiswa panze kwemakore makumi mashanu isina kukuvara nemwaranzi ye ultraviolet.