Anti-corrosive Polyethylene Coating ye3PE Pipeline

Kuputira polyethylene kunodzivirira ngura kunowanzova kuputira kwepolyethylene kune mativi matatu, kwakapfupikiswa se3PE. Chigadziko chezasi chinowanzova kuputira kwehupfu hwe epoxy, chikamu chepakati chine namati, uye chikamu chekunze chine kuputira kwe polyethylene.

Anticorrosive Coating Structure

Iyo matatu-layer chimiro polyethylene anticorrosive coating inopfupikiswa se3PE. Iyo yepasi layer ndeye epoxy poda coating, yepakati layer inonamira, uye yekunze layer i polyethylene.

mutambo

Yekutanga layer ye3PE ndeye epoxy coating, yechipiri layer inonamira, uye yechitatu layer ndeye extruded polyethylene coating. Iwo akaturikidzana akanyatsobatanidzwa kune mumwe nemumwe kuti aite chimiro chakaumbwa, achizadzisa masimba emumwe. Inoshandisa simba rekubatanidza rakasimba pakati peepoxy powder uye simbi pombi pamusoro kunatsiridza adhesion; uye inoshandisa yakanakisa simba remuchina, kugadzikana kwekemikari, kusungirira, kuramba kupinza midzi yekudyara, uye kushomeka kwemvura kweiyo extruded polyethylene kuvandudza kushanda kwayo kwese. Izvi zvinoita kuti kuita kwese kweiyo matatu-layer PE anticorrosive coating kuve yakakurumbira uye yakazara, inokodzera nharaunda dzakaomarara dzine zvinodikanwa zvepamusoro zvemakinika zvivakwa, ivhu kusagadzikana kusagadzikana, uye kushomeka kwemvura kwechifukidziro, senge ivhu rematombo, zvikamu zvedombo, nzvimbo. ine hunyoro hwevhu hwepamusoro, uye nzvimbo dzine midzi yemiti yakagadzirwa.

kunyoresa

Usati waisa anticorrosive coating, pamusoro pepombi yesimbi inofanira kucheneswa girizi, tsvina, uye zvimwe zvakabatanidzwa, uye pamusoro pacho panofanirwa kugadziridzwa mushure mekupisa pombi yesimbi patembiricha ye40-60 ℃. Iyo yepamusoro pretreatment quality inofanirwa kusangana nezvinodiwa zveSa2.5 level ye "Surface Rust Grade uye Rust Removal Grade yeSimbi Pamberi Painting" GB / T 8923, uye anchor pattern yakadzika inofanira kusvika 50μm-75μm. Weld slag, burrs, uye zvimwe zvakasvibiswa pamusoro pepombi yesimbi zvinofanira kubviswa.

Shandisa inosvibisa-isina kupisa sosi kupisa pombi yesimbi kune yakakodzera kupisa tembiricha, uye zvakaenzana isa epoxy poda coating pamusoro pepombi yesimbi. Iyo yekunamatira inofanirwa kuiswa panguva ye epoxy poda yekurapa maitiro. Iyo polyethylene layer inogona kuvharwa uchishandisa iyo longitudinal extrusion process kana lateral kuputira maitiro. Kune mapaipi esimbi ane dhayamita yezita rakakura kupfuura 500mm, iyo lateral yekuputira maitiro inokurudzirwa. Paunenge uchishandisa lateral kuputira process, ita shuwa kuti iyo polyethylene pamativi ese ekupindirana uye iyo polyethylene kumativi ese e weld yakapetwa uye yakapetana, uye kudzivirira iyo polyethylene yekuputira pamusoro kubva pakupwanyika. Paunenge uchishandisa iyo longitudinal extrusion process, hapafanirwe kunge paine voids pamativi ese e weld. Mushure mekunge polyethylene layer yaputirwa, ita shuwa kuti iyo fused epoxy coating yapora zvachose, uye woitonhodza nemvura kune tembiricha yesimbi isingakwire kupfuura 60 ℃.

Kugadzirisa

Kana pakakanganisika papombi ye3PE, yekukuvadza isingasviki kana kuenzana ne30mm, zvinokurudzirwa kushandisa zvigamba zvekugadzirisa nemwaranzi yakayambuka-yakabatana polyethylene. Paunenge uchigadzirisa, tanga wabvisa tsvina panzvimbo yakakanganiswa uye roughen polyethylene layer. Zvadaro cheka polyethylene layer panzvimbo yakakanganisika kuita denderedzwa, uye mupendero unofanirwa kushandurwa kuita kona isina kujeka. Zadza gomba neadhesive inofanana nechigamba chekugadzirisa, uye wozonamatira chigamba chekugadzirisa. Kukura kwechigamba chekugadzirisa kunofanirwa kuve nechokwadi kuti mupendero wacho unosvika 100mm kubva kumucheto wegomba mu polyethylene layer. Paunenge wakanamatira chigamba, chidzise paunenge uchichiputira neroller kana kuchisvina nemagirovhosi asingadziviriri kuti ubvise mweya kusvikira chishongedzo chakakomberedza chigamba chekugadzirisa zvakaenzana.

Pakukuvadzwa kukuru kupfuura 30mm, tanga wabvisa tsvina panzvimbo yakakuvadzwa, roughen polyethylene layer, uye cheka polyethylene layer panzvimbo yakakuvadzwa kuita denderedzwa, uye mupendero unofanirwa kushandurwa kuita kona isina kujeka. Zadza gomba neadhesive inofanana nechigamba chekugadzirisa, uye wozonamatira chigamba chekugadzirisa. Pakupedzisira, putira tepi inoputika yakakomberedza nzvimbo yekugadzirisa, uye hupamhi hwekuputira hunofanira kunge huri 50mm yakakura kudarika rutivi rumwe rwechigamba chekugadzirisa.

Neimwe nzira, iyo yepamusoro inogona kucheneswa kutanga, uyezve maviri-chikamu liquid epoxy coating inogona kushandiswa anticorrosion. Iyo yakaoma firimu ukobvu inofanira kunge yakafanana neyepombi huru, uye ipapo chigamba chekugadzirisa kana kupisa shrinkable tepi inogona kuiswa.

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