Welded steel pipe (Welded steel pipe) zvinoreva pombi yesimbi ine musono pamusoro pepamusoro iyo inoumbwa nekumoneredza mitsetse yesimbi kana marata esimbi kuita denderedzwa, sikweya, nemamwe maumbirwo obva aapinza. Iyo billet inoshandiswa kune welded simbi pombi isimbi ndiro kana strip simbi. Kubva kuma1930s, nekukurumidza kusimudzira kwemhando yepamusoro simbi yesimbi inoenderera kugadzirwa uye kufambira mberi kwewelding uye yekuongorora tekinoroji, mhando yewelds yakaramba ichivandudzwa, akasiyana uye zvirevo zvemapombi esimbi akaiswa akawedzera, uye akatsiva. mapaipi esimbi asina musono muminda yakawanda. Welded simbi pombi vane yakaderera mutengo uye yakakwirira kugadzirwa kunyatsoshanda pane musono simbi pombi.

Mapombi esimbi akakamurwa kuita mapaipi asina musono uye akasungwa. Welded pombi dzakakamurwa dzakatwasuka musono simbi pombi uye spiral simbi pombi. Mapombi akaiswa musono akakamurwa kuita ERW simbi pombi (yakakwirira-frequency resistance welding) uye LSAW simbi pombi (yakatwasuka musono yakanyura arc welding). The welding process of spiral pombi ndiwowo musiyano pakati pekunyudza arc welding (SSAW simbi pombi kwenguva pfupi) uye LSAW simbi pombi muchimiro welds, uye musiyano ne ERW ndiwo mutsauko muwelding process. Submerged arc welding (SAW simbi pombi) inoda kuwedzerwa kwepakati (welding wire, flux), asi ERW haidi. ERW inonyungudutswa nepakati-frequency kudziyisa. Mapaipi esimbi anogona kukamurwa kuita mapoka maviri zvichienderana neyakagadzirwa nzira: isina musono simbi pombi uye welded simbi pombi. Mapaipi esimbi asina musono anogona kupatsanurwa kuita mapaipi anopisa anokungurutswa asina musono, pombi dzinodhonzwa nechando, pombi dzesimbi dzakakwana, mapombi akawedzera kupisa, mapaipi anorukwa anotonhora, uye mapombi akabuditswa zvichienderana nenzira yekugadzira. Mapaipi esimbi asina musono anogadzirwa nemhando yepamusoro kabhoni simbi kana alloy simbi uye akakamurwa kuita inopisa-yakakungurutswa uye inotonhora-yakakungurutswa (yakadhonzwa).

Iyo nzira yekugadzira yeakatwasuka seam welded pombi iri nyore, ine yakakwirira kugadzirwa kwehunyanzvi, mutengo wakaderera, uye kukurumidza kusimudzira. Kusimba kwepombi dzakaiswa welded dzinowanzokwirira kupfuura dzepombi dzakaiswa seam dzakarukwa. Mabheti matete anogona kushandiswa kugadzira mapaipi akasungwa ane madhayamita akakura, uye mabheti ehupamhi hwakafanana anogonawo kushandiswa kugadzira mapaipi akasungwa ane madhayamita akasiyana. Zvisinei, kana zvichienzaniswa nemapaipi akatwasuka ehurefu hwakafanana, kureba kweweld kunowedzera ne30 ~ 100%, uye kukurumidza kwekugadzira kwakaderera. Naizvozvo, madiki-dhayamita akaiswa welded pombi anowanzo welded neakatwasuka seam welding, nepo mahombe akaiswa dhayamita mapombi anowanzo welded ne spiral welding.