ASTM A106 Bututu mara nauyi

ASTM A106 shine daidaitaccen bututun ƙarfe na ƙarfe maras nauyi mafi yawan masu zanen kaya suna tantance lokacin da layin zai ɗauki ruwan zafi ko iskar gas a ƙarƙashin matsin lamba. An yi shi don sabis ɗin zafi mai ɗaukaka{2}, ana ƙididdige shi daidai da ASME B36.10M, kuma ana iya ba da shi tare da filaye ko ƙulle-ƙulle don walda, lankwasa da flanging. Daga cikin maki A, B da C a cikin ASTM A106, Grade B ana amfani dashi mafi yawa saboda yana ba da ingantaccen haɗin ƙarfi, ductility da weldability don layukan tururi, masu matatun mai, sarrafa bututu da da'irori.

• Standard: ASTM A106 / ASME SA106
• Daraja: B (kuma akwai A, C idan aikin ya ba da izini)
• Form: Mara kyau, zafi - ƙare ko sanyi{1}} ƙare
• Ƙare: Ƙarshen Ƙarshen (PE) ko Ƙarshen beveled (BE) don walda
• Girma: ASME B36.10M, NPS da jadawalin{1}}

Matsayin ya dogara ne akan ƙirar siliki mai sauƙi, mai kyau{0} sarrafa carbon–manganese–silicon. Sarrafa P da S yana kiyaye bututu mai walƙiya da tauri.

Me ya sa wannan ya shafi: carbon yana ba da matakin ƙarfin tushe; manganese yana taimakawa wajen daidaita tsarin ferrite-pearlite kuma yana inganta taurin; silicon yana inganta juriya / iskar oxygen lokacin da bututu ke ɗauke da tururi mai zafi ko kafofin watsa labarai na sarrafawa.

Grade B shine "tsakiyar" aji amma ya riga ya yi ƙarfi don yawancin aikace-aikacen shuka.

Fassara don ƙira da ƙirƙira: Ƙarfin ƙarfi yana kare kariya daga fashewa da nauyin axial; Ƙarfin yawan amfanin ƙasa shine iyaka kafin nakasu na dindindin, musamman mahimmanci ga babban matsa lamba; elongation yana tabbatar da cewa bututun na iya zama fili{1}} lanƙwasa, welded kuma a sanya shi ba tare da tsagewa ba.

Ayyuka a Babban Sabis na Zazzabi{{0}
A106 Grade B an yi niyya don ci gaba da hidima a yanayin zafi na ƙarfe kusan har zuwa rukunin digiri 400-450. A wannan matakin ferrite-pearlite microstructure ya kasance karko, silicon yana taimakawa saman juriya, kuma bututu yana kiyaye karfinsa{4}} Shi ya sa aka kayyade shi don layukan ciyarwar tukunyar jirgi, masu kan tururi, bututun mai zafi{6}}, sabis na mai zafi da tsarin kayan aikin matatar. Tare da ingantattun hanyoyin PWHT da hanyoyin walda, bututun kuma zai iya gudana cikin sabis na keke-da-keke ba tare da saurin asarar tauri ba.

Don A106 Grade B hanyar masana'anta ba wurin kayan haɗi ba ne - shine dalilin da bututu zai iya aiki da gaske a babban zafin jiki da matsa lamba. Hanyar niƙa ta yau da kullun don A106 Grade B a Octal Pipe yayi kama da haka:

1. Zaɓin Billet da sarrafa sinadarai
Samfuran yana farawa daga kashe (cikakken deoxidized), lafiya - hatsin carbon karfe wanda ya riga ya dace da kewayon sinadaran A106. Wannan yana tabbatar da ƙananan P da S, tsabta mai kyau da weldability. Ana duba zafi kafin mirgina don haka za'a iya kaiwa ga maƙasudin maƙasudin digiri na B bayan ƙirƙirar da maganin zafi.

2. Dumamar Billet
Ana ɗora billet ɗin a cikin rotary ko tafiya - tanderun murhu zuwa zafin huda/mirgina. Dumama Uniform yana da mahimmanci a nan saboda rashin daidaituwar zafin jiki zai haifar da bambancin kauri lokacin da aka huda billet.

3. Zafafan huda (yin huda)
Ana huda billet ɗin zafi akan giciye -rol ko injin niƙa mai huda don samar da harsashi mara tushe. Anan ne bututun ya juya daga wani ƙaƙƙarfan zagaye zuwa bututu mara nauyi. Manufar ita ce samar da harsashi ba tare da fashewar tsakiya ba kuma tare da ko da bango kewaye da kewaye.

4. Elongation da toshe / mandrel mirgina
Sa'an nan kuma za a yi elongated harsashi da kuma birgima a kan wani madauki ko toshe niƙa don isa kusa da oda diamita da kauri bango. Ana iya amfani da matakan birgima da yawa don tace bango da inganta farfajiya. Wannan matakin shine mabuɗin don sanya saman ciki santsi da kuma kiyaye kaurin bango cikin haƙuri.

5. Girma / rage niƙa
Girman girma ko rage niƙa yana kawo bututu zuwa OD na ƙarshe da zagayensa. Don jadawali mafi girma (bangon kauri), ana daidaita sigogin mirgina don kula da hankali. Madaidaicin girman anan yana nufin sauƙin walda kuma mafi dacewa{2} sama akan rukunin yanar gizon.

6. Sanyi da daidaitawa
Bayan aiki mai zafi, ana sanyaya bututu ta hanyar sarrafawa sannan kuma a wuce ta na'urar daidaitawa. Daidaitawa yana da mahimmanci don spools da aka riga aka kera da kuma don walda ta atomatik.

7. Maganin zafi (kamar yadda ake bukata)
Ya danganta da girman bututu, rabon raguwa da buƙatun mai siye, ana iya daidaita bututun ko kuma a sassauta damuwa{0}.

Daidaita tsarin ferrite-pearlite, yana fitar da kaddarorin tare da tsayi kuma yana haɓaka tauri.

Taimakon danniya yana kawar da matsalolin da ke tasowa, wanda ke da amfani idan za'a sanya bututun zuwa cikin tsarin da zai ga hawan zafi.
Wannan kulawar zafi mai sarrafawa shine abin da ke taimakawa A106 Grade B ya kiyaye ductility da tasiri mai tasiri a cikin sabis na zafi.

8. Ƙarshe, NDE da hydrotest
An yanke bututun da aka gama zuwa tsayi, an fuskanci ƙarshensu / an yi musu ƙwanƙwasa, kuma kowane tsayin ana duba shi ta gani don daidaiton tsayi da girma. Sannan ana gwada bututun:

• gwajin hydrostatic don tabbatar da matsi
• eddy{0}} na yanzu ko ultrasonic NDE don nemo lahani na ciki/surface
• alama da shafi / varnish don kariya
• Bayan duk waɗannan matakan ne kawai aka saki bututu tare da MTC.

Saboda gaba dayan hanyar ba su da kyau (babu waldi na tsaye), bututun yana da juriyar matsi iri ɗaya a kusa da cikakken kewaye - babban dalilin da aka zaɓa A106 akan bututun walda don sabis na zafi mai girma.

(kayan aiki na yau da kullun, na iya bin buƙatar aikin)

Don sa bututun ya zama karbabbe don matsa lamba da sabis mai zafi, ASTM A106 yana nufin buƙatun gabaɗaya a cikin ASTM A999. Octal Pipe na iya samar da cikakkiyar hanyar gwaji:

• Gwajin Hydrostatic akan kowane tsayi don tabbatar da matsi
• Gwajin mara lalacewa (eddy current ko ultrasonic) don tantance saman da lahani na ciki
• Gwajin juzu'i da taurin kowane zafin ƙarfe don tabbatar da yarda da injina
• Gwaje-gwajen lanƙwasa / lanƙwasa don nuna ductility
• Kayayyakin gani, OD, bango da tsayin dubawa don tabbatar da daidaiton girma
• MTCs zuwa EN 10204 3.1/3.2 don cikakken zafi da gwajin ganowa

Makullin mahimmanci shine A106 Grade B an ƙayyade lokacin da sabis ɗin duka biyu nemkumahigh -zazzabi. Lokacin da ake buƙata yana daki{1}}zazzabi ko tsari, masu siye sukan je ASTM A53 maimakon; Lokacin da buƙatar bututun layi tare da buƙatun PSL, suna zuwa API 5L. Tsayar da wannan shafin a sarari don "high - zafi CS bututu" zai taimaka wa Google ya fahimci abin da wannan URL yake.

• Bututun ƙarfe mara nauyi wanda aka samar zuwa ASTM A106 / ASME SA106
• Darajin B a matsayin ma'auni; Darajoji A ko C lokacin da ake buƙata ta aikin
• Yanke -zuwa{1}} tsayi, ƙulle-ƙulle, sutura / fenti da tattara kayan fitarwa na samuwa
• Duk gwaje-gwaje (hydro, NDE, inji) an tattara su kuma ana iya gano su
• - ana iya shirya duban ɓangare na uku (BV, SGS, LR, da sauransu) kafin jigilar kaya
• Ƙwarewar samarwa don matatar, wutar lantarki da tsire-tsire masu sinadarai inda fakitin takardu dole ne su dace da buƙatun EPC

Tuntuɓi yanzu

FAQ

 

 

Q1: Menene ASTM A106 Grade B bututu mara amfani don?

A1:Maɗaukakin zafin jiki, tsayin{1}matsi na aiwatar da bututu kamar layukan tururi, bututun matatun, layin ciyarwar tukunyar jirgi, da sabis na mai mai zafi.

Q2: Menene bambanci tsakanin ASTM A106 Grade B da ASTM A53 Grade B?

A2:An kayyade A106 don sabis na zafi mai girma{1} kuma yawanci ana zaɓa lokacin da ake buƙatar bututu mara nauyi; Yawancin lokaci ana zaɓar A53 don ƙananan{3}}zazzabi/gabaɗayan aikace-aikacen sabis.

Q3: Wadanne gwaje-gwaje da takaddun zan nemi bututun ASTM A106 Grade B?

A3:Nemi sakamakon hydrotest ko NDE, yarda da injina/kemistry, cikakken zafi{0}} gano lamba, da fakitin EN 10204 3.1 MTC.

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