Spiral welded pipe (SSAW) kubvisa ngura uye anticorrosion process sumo: Kubvisa ngura chikamu chakakosha chepombi inodzivirira kupisa. Parizvino, kune nzira dzakawanda dzekubvisa ngura, dzakadai semanyorero ekubvisa ngura, kuputika kwejecha uye pickling rust kubviswa, etc. Pakati pavo, bhuku remanyoro rinobvisa, mechanical rust kubvisa uye kupenda kubvisa rust (anti-corrosion brushing oil) inowanzoita ngura. nzira dzokubvisa.

1. Manual derusting

Bvisa chiyero uye jecha rekukanda pamusoro pepombi, midziyo uye midziyo ine scraper uye faira, uye ipapo shandisa waya bhurashi kubvisa ngura inoyangarara pamusoro pepombi, midziyo uye midziyo, wozoipukuta nejecha, uye pakupedzisira pukuta. navo nedonje sirika. net.

2. Mechanical ngura kubvisa

Kutanga shandisa scraper kana faira kubvisa chiyero uye kukanda jecha pamusoro pepombi; zvino munhu mumwe ari pamberi pemuchina wekudzikisa uye mumwe ari seri kwemuchina wekudzikisa, uye pombi inodzokororwa kakawanda mumushini wekudzikisa kusvikira ruvara rwechokwadi rwesimbi rwabuda pachena; Usati wazora mafuta, pukuta zvakare nekotoni sirika kuti ubvise madota anoyangarara pamusoro.

3. Anti-corrosion brush oil

Mapaipi, midziyo uye mavharuvhu emidziyo anowanzo anti-corrosion uye anozorwa mafuta zvinoenderana nezvinodiwa zvekugadzira. Kana pasina chinodikanwa chekugadzira, mirairo inotevera inofanirwa kuteverwa:

a. Mapaipi akaiswa pamusoro, midziyo nemidziyo zvinofanirwa kutanga zvapendwa nejasi rimwe rependi inodzivirira ngura, uyezve mabhachi maviri ejasi repamusoro anofanira kupendwa asati apihwa. Kana pane zvinodiwa zvekuchengetedza kupisa uye anti-condensation, majasi maviri ependi inorwisa-rust inofanira kuvezwa;

b. Penda majasi maviri ependi ye-anti-rust pamapombi akavanzika, zvishandiso uye midziyo. Chipfeko chechipiri chependi ye-anti-rust inofanira kuve yakapendwa mushure mokunge jasi rekutanga raoma zvachose, uye kuwirirana kwepende ye-anti-rust inofanira kunge yakakodzera;

3. Apo pombi yakavigwa inoshandiswa se-anti-corrosion layer, kana ichivakwa munguva yechando, zvinokurudzirwa kushandisa rubber solvent oil kana aviation petroli kuti iparadze 30 A kana 30 B petroleum asphalt. Mhando mbiri:

① Manual brushing: manual brushing inofanira kuiswa muzvikamu, uye imwe neimwe nhanho inofanira kudzokororwa, criss-yambukwa, uye kupfeka kunofanira kuchengetwa yunifomu pasina kupotsa kana kudonha;

② Mechanical spraying: Iyo yakapfapfaidzwa pendi inoyerera inofanirwa kuve perpendicular kune yakapendwa nzvimbo panguva yekupfapfaidza. Kana iyo pendi pendi yakati sandara, chinhambwe chiri pakati pemhuno nenzvimbo yakapendwa inofanira kuva 250-350mm. Kana nzvimbo yakapendwa iri arc, chinhambwe chiri pakati pemhuno nenzvimbo yakapendwa inofanira kunge iri 400mm. , Pakupfapfaidza, kufamba kwenozzle kunofanirwa kunge kwakafanana, kumhanya kunofanirwa kuchengetwa pa10-18m/min, uye kudzvanywa kwemhepo kunoshandiswa pakupfapfaidza pendi kunofanira kuva 0.2-0.4MPa.