Menene "Pipeline Steel"?

Bututun karfe aikace-aikace

Bututun karfesamfurin siffofin hada da sumul karfe bututu da welded karfe bututu, wanda za a iya raba uku Categories: mai tsayi, high-sulfur yankunan da seabed kwanciya.Waɗannan bututu tare da matsananci aiki yanayi da dogon Lines kuma ba sauki don kula da, kuma suna da m ingancin bukatun. .

Kalubalan da karafan bututun mai ke fuskanta sun hada da: galibin filayen mai da iskar gas suna cikin yankunan polar, tudun kankara, sahara, da teku, kuma yanayin yanayi yana da tsauri;ko don inganta haɓakar sufuri, diamita na bututun yana karuwa akai-akai, kuma matsin lamba yana karuwa akai-akai.

Pipeline Karfe Properties

Daga cikakken kimantawa na ci gaban yanayin bututun mai da iskar gas, yanayin shimfida bututun mai, manyan hanyoyin gazawa da abubuwan gazawa, bututun karfe yakamata ya sami kyawawan kaddarorin inji ( bango mai kauri, babban ƙarfi, tauri mai ƙarfi, juriya), kuma yakamata ya kasance. babban diamita, Ya kamata kuma yana da manyan diamita, weldability, sanyi da ƙarancin zafin jiki, juriya na lalata (CO2), jure ruwan teku da HIC, aikin SSCC, da sauransu.

① Ƙarfi mai ƙarfi

Bututun ƙarfe ba wai kawai yana buƙatar ƙarfin ƙarfi mai ƙarfi da ƙarfin samar da ƙarfi ba, amma kuma yana buƙatar ƙimar yawan amfanin ƙasa ya kasance cikin kewayon 0.85 ~ 0.93.

② Babban tasiri tauri

babban tasiri tauri zai iya saduwa da bukatun hana fasa.

③ Low ductile-gaggautsa zafin jiki

Yankuna masu ƙarfi da yanayin yanayi suna buƙatar bututun ƙarfe don samun isassun ƙarancin ƙarancin ductile-gaggawa canjin yanayin zafin jiki. The yanki mai ƙarfi na DWTT (Drop Weight Tear Test) ya zama babban maƙasudin kulawa don hana gazawar bututun mai. yankin karyewar samfurin ya zama ≥85% a mafi ƙarancin zafin aiki.

④ Kyakkyawan juriya ga fashewar hydrogen-induced (HIC) da sulfide stress corrosion cracking (SSCC)

⑤ Kyakkyawan aikin walda

Kyakkyawan weldability na karfe yana da matukar muhimmanci don tabbatar da mutunci da ingancin walda na bututun.