ASTM A252 Grade 3shine kayan da aka fi amfani da su azaman bututun silinda.
Tubalan bututun ƙarfe na aji 3 ba a iyakance su ga takamaiman tsarin samarwa ba kuma ana iya ƙera su ta amfani da hanyoyi daban-daban na ƙera bututu, gami daSMSS(babu sumul),SAW(an ƙera baka mai nutsewa), da kumaEFW(an haɗa shi da wutar lantarki). Wannan sassauci yana ba da damar daidaitawa da buƙatun injiniya daban-daban da yanayin aikace-aikace.
A matsayinsa na mafi girman matsayi a cikin ma'aunin A52, yana da kyawawan halaye na injiniya tare da mafi ƙarancin ƙarfin samarwa na 310 MPa da mafi ƙarancin ƙarfin juriya na 455 MPa kuma ana iya amfani da shi azaman kayan gini na dindindin mai ɗaukar nauyi ko azaman harsashi don tarin siminti da aka yi da siminti.
TheASTM A252Ma'auni ya rarraba tukwanen bututun ƙarfe zuwa matakai uku don dacewa da yanayin aikace-aikace daban-daban da buƙatun lodi. Aji uku sune:
Aji na 1, Aji na 2, da Aji na 3.
Kamfanin ya gabatar da cikakken kayan aikin samar da bututun ƙarfe na JCOE LSAW da kayan aikin gwaji, waɗanda suka ƙware wajen samar da bututun ƙarfe na LSAW mai kauri da diamita mai girma tare da DSAW (walda mai gefe biyu mai zurfi a ƙarƙashin ruwa).
Bayanan samfurin sune:
Diamita na waje: DN 350 – 1500;
Kauri a Bango: 8 - 80 mm;
Tubalan bututu za su kasance a bayyane.
Za a yanke ƙarshen ta hanyar wuta ko a yanke ta da injina sannan a cire ta.
A cikin lamarinƙarshen da aka yanke, kusurwar ƙarshen da aka yanke ya kamata ta kasance30 - 35°.
Botop Karfeyana ba da nau'ikan bututun ƙarfe masu inganci na ASTM A52. Da fatan za a iya tuntuɓar mu don buƙatunku.
Za a yi ƙarfen ta hanyar ɗaya ko fiye daga cikin waɗannan hanyoyin: buɗaɗɗen murhu, basic-oxygen, ko wutar lantarki.
Za a yi amfani da A252 ta hanyarbabu matsala, juriya ta lantarki da aka welded, walƙiya mai walƙiya, kohaɗakarwatsari.
Za a haɗa bututun da aka haɗa da bututun da aka haɗana tsawon lokaci, siffar helical, kolap mai siffar helical.
Domin tabbatar da inganci da aikin bututun ƙarfe, yana da matuƙar muhimmanci a zaɓi tsarin samarwa da ya dace.
Tsarin LSAW (SAWL) ya dace da bututun ƙarfe mai kauri da diamita mai girma da kauri, musamman a ayyukan gini da kayayyakin more rayuwa waɗanda ke buƙatar ƙarfin ɗaukar kaya mai yawa da kuma zurfin ginin tushe. Saboda ƙarfinsa mai kyau, ƙarfin ɗaukar kaya, da kuma sauƙin daidaitawa da zurfinsa, yana iya daidaitawa da yanayi daban-daban masu rikitarwa na yanayin ƙasa yayin da yake ba da fa'idodin shigarwa cikin sauri da dorewa na dogon lokaci.
JCOEtsari ne na gama gari wajen samar da bututun ƙarfe na LSAW, wanda ke da fa'idodin inganci mai yawa, inganci mai yawa, ƙarfin samar da babban diamita, daidaiton girma, daidaitawa, da kuma tattalin arziki, wanda hakan ya sanya shi tsarin samar da bututun da aka fi so a cikin manyan ayyukan injiniya.
Karfe zai ƙunshiphosphorus ba fiye da 0.050% ba.
Rage sinadarin phosphorus a cikin ƙarfe yana nufin tabbatar da cewa ƙarfen yana da kyawawan halaye na injiniya, musamman lokacin amfani da shi don aikace-aikacen gini kamar tara ginin gini.
Wannan iyakancewa yana taimakawa wajen hana ƙarfen yin rauni sosai a yanayin zafi mai ƙanƙanta, don haka yana tabbatar da aminci da amincin amfani da shi.
Ga sauran abubuwan da ke cikin abubuwan, babu wasu buƙatu.
Wannan kuwa saboda babban abin da bututun bututun ke mayar da hankali a kai shi ne tabbatar da cewa bututun suna da isasshen ƙarfi da tauri na tsari, waɗanda suke da matuƙar muhimmanci don amfani da su a cikin tsarin tallafi.
Ga bututun bututun bututun, ana ba da ƙarin kulawa ga halayen injina na bututun, kamar ƙarfin samarwa, ƙarfin tauri, da tauri, domin waɗannan kaddarorin suna da alaƙa kai tsaye da ƙarfin ɗaukar kaya da kwanciyar hankali na tarin bututun a aikace-aikace.
ATebur na 2 yana ba da mafi ƙarancin ƙima da aka ƙididdige:
Idan kauri na bango da aka ƙayyade ya kasance tsaka-tsaki ga waɗanda aka nuna a sama, za a ƙayyade mafi ƙarancin ƙimar tsawaitawa kamar haka:
Darasi na 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: tsawo a cikin inci 2 [50.8 mm], %;
t: ƙayyadadden kauri na bango, in. [mm].
Ma'aunin ASTM A252 Grade 3 yana tabbatar da aminci da amincin tarin bututun da ake amfani da su ta hanyar saita mafi ƙarancin buƙatu don waɗannan kaddarorin injiniya.
Ga girman bututun da ba a lissafa a cikin teburin nauyin bututun ba, ana iya ƙididdige nauyin kowane ɗayan tsawon ta amfani da dabarar.
w = C×(Dt)×t
w: nauyi a kowane tsawon raka'a, Ilb/ft [kg/m];
D: diamita na waje da aka ƙayyade, in. [mm];
t: ƙayyadadden kauri na bango, in. [mm];
C: 0.0246615 don lissafi a cikin raka'o'in SI da kuma 10.69 don lissafi a cikin raka'o'in USC.
Lissafin da ke sama sun dogara ne akan zato cewa yawan bututun ƙarfe shine 7.85 kg/dm³.
ASTM A252 Grade 3 yana da ƙarfi da ƙarfi sosai ga nau'ikan ƙasa da buƙatun ɗaukar kaya iri-iri. Ana amfani da wannan bututun ƙarfe a aikace-aikace masu zuwa:
1. Gina harsashin gini: Ana amfani da bututun ƙarfe na ASTM A252 Grade 3 a matsayin harsashin harsashi a aikin harsashin gini na gine-gine masu tsayi, gadoji, da sauran manyan gine-gine don samar da tallafi da kwanciyar hankali da ake buƙata.
2. Tashoshin jiragen ruwa da tashoshin jiragen ruwa: Ana amfani da waɗannan bututun ƙarfe don tara abubuwa a cikin ginin tashoshin jiragen ruwa da tashoshin jiragen ruwa don tabbatar da cewa tsarin yana iya jure tasirin jiragen ruwa da kuma lalacewar muhallin ruwa. Domin ƙara juriya da juriya ga tsatsa na bututun ƙarfe, sau da yawa ana amfani da rufin don samar da ƙarin kariya.
3. Aikin Ruwa: Ana amfani da bututun ƙarfe na ASTM A252 Grade 3 don ƙarfafa gaɓar kogi da kuma samar da kariya daga ambaliyar ruwa a wajen gina madatsun ruwa, makullai, da sauran wuraren samar da ruwa.
4. Ayyukan Makamashi: A cikin ayyukan samar da wutar lantarki ta iska, na'urorin mai, da sauran ayyukan samar da makamashi, ana amfani da waɗannan bututun ƙarfe a matsayin tsarin tallafi don tabbatar da ingantaccen aikin kayan aiki.
5. Kayan sufuri: Ana amfani da bututun ƙarfe na ASTM A252 Grade 3 don tara kayan aikin gina layin dogo, manyan hanyoyi, da titin jirgin sama don samar da isasshen ƙarfin ɗaukar kaya da dorewa.
Tun lokacin da aka kafa ta a shekarar 2014,Botop Karfeya zama babban mai samar da bututun ƙarfe na carbon a Arewacin China, wanda aka san shi da kyakkyawan sabis, kayayyaki masu inganci, da kuma cikakkun hanyoyin magance matsaloli.
Botop KarfeTana bayar da nau'ikan bututun ƙarfe na carbon da kayayyaki masu alaƙa, gami da bututun ƙarfe na ERW, LSAW, da SSAW marasa sulɓi, da kuma cikakken jerin kayan haɗin bututu da flanges. Kayayyakinta na musamman sun haɗa da ƙarfe masu inganci da ƙarfe marasa austenitic, waɗanda aka ƙera don biyan buƙatun ayyukan bututu daban-daban.
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