Iityhubhu ze-ASTM A334 ziityhubhu zekhabhoni kunye nentsimbi ye-alloy ezenzelwe ukusetyenziswa kubushushu obuphantsi kwaye zenziwe kusetyenziswa iinkqubo ezingenamthungo nezidibeneyo.
Ezinye iisayizi zemveliso zisenokungafumaneki phantsi kwale nkcazelo kuba ubukhulu bodonga obunzima bunempembelelo embi kwiimpawu zempembelelo eziphantsi kobushushu.
Ulwahlulo lweeBanga
I-ASTM A334 ineeklasi ezahlukeneyo zeendawo ezahlukeneyo zobushushu obuphantsi.
Ibanga loku-1, iBanga lesi-3, iBanga lesi-6, iBanga lesi-7, iBanga lesi-8, iBanga lesi-9, kunye neBanga le-11.
Amanqanaba eumbhobho wentsimbi yekhabhoniziIbanga loku-1kwayeIbanga lesi-6.
Amanqaku afanelekileyoiityhubhu zentsimbi ye-alloy zeBanga lesi-3, iBanga lesi-7, iBanga lesi-8, iBanga lesi-9, kunye neBanga le-11.
Uhlobo ngalunye lwentsimbi lunemilo yalo ethile yeekhemikhali kunye neemfuno zeempawu zoomatshini, kunye nemigangatho yokuvavanya ubushushu obuncinci ekufuneka ifezekiswe.
Iinkqubo zoMveliso
Iityhubhu mazizenziwe yiingenamthungookanye ngokuzenzekelayoinkqubo yokuweldangaphandle kokongeza intsimbi yokuzalisa xa kusetyenzwa ukuwelda.
Unyango lobushushu
Ibanga loku-1, lesi-3, lesi-6, lesi-7, nelesi-9
Lungisa ubushushu ngokubufudumeza bufikelele kwiqondo lobushushu elifanayo elingaphantsi kwe-1550 °F [845 °C] uze upholise emoyeni okanye kwigumbi lokupholisa lesithando esilawulwa ngumoya.
Ukuba kuyimfuneko ukucocwa kwesimo, kuya kufuneka kuxoxiswane ngako.
Kuphela kwiindidi ezingentla zeetyhubhu zentsimbi ezingenamthungo:
Phinda ufudumale kwaye ulawule ukusebenza okushushu kunye nobushushu bomsebenzi wokugqiba oshushu ukuya kutsho kubushushu bokugqiba obuqala kwi-1550 - 1750 °F [845 - 955℃] uze upholise kwi-atmosphere elawulwayo ukusuka kubushushu bokuqala obungaphantsi kwe-1550 °F [845 °C].
Ibanga lesi-8
Khetha nayiphi na kwezi ndlela zilandelayo zonyango lobushushu.
Ucinyiwe kwaye Uthomalalisiwe;
Iphindwe kabini kwaye ilungelelaniswe kabini.
Ibanga le-11
Ukuba kufuneka kufakwe iityhubhu zeBanga le-11 okanye hayi, ngokwesivumelwano phakathi komthengi nomthengisi.
Xa iityhubhu zeBakala le-11 zifakwe i-anneal, mazibekwe kwindawo eqhelekileyo ukusuka kwi-1400 - 1600℉[760 - 870 °C].
Ulwakhiwo lweekhemikhali lwe-ASTM A334
Kwizinyithi zeBanga loku-1 okanye leBanga lesi-6, akuvumelekanga ukubonelela ngamabakala okudibanisa naziphi na izinto ngaphandle kwezo zifunekayo ngokucacileyo. Nangona kunjalo, kuvumelekile ukongeza izinto ezifunekayo ekususeni i-oxidation kwintsimbi.
Uvavanyo lwe-ASTM A334 Mechanical
Iimfuneko zepropathi yoomatshini azisebenzi kwiipayipi ezincinci kune-1/8 intshi [3.2 mm] ububanzi bangaphandle kwaye ubukhulu bodonga bungaphantsi kwe-0.015 intshi [0.4 mm].
1. Ipropati yokuThatha
Ubuncinane bobude obubalwe kunciphiso ngalunye lwe-1/32 intshi [0.80 mm] kubukhulu bodonga:
Kwimibhobho encinci kune 1/2 intshi. [12.7 mm] ububanzi bangaphandle, amaxabiso okwandiswa anikiweyo kwimizekelo yemicu aya kusebenza.
2. Uvavanyo lweMpembelelo
Khetha ubushushu obufanelekileyo kunye namandla empembelelo ahambelanayo ngokusekelwe kudidi kunye nobukhulu bodonga.
Amandla empembelelo
Ubushushu obunempembelelo
| Ibanga | Uvavanyo loBushushu lweMpembelelo | |
| ℉ | ℃ | |
| Ibanga loku-1 | -50 | -45 |
| Ibanga lesi-3 | -150 | -100 |
| Ibanga lesi-6 | -50 | -45 |
| Ibanga lesi-7 | -100 | -75 |
| Ibanga lesi-8 | -320 | -195 |
| Ibanga lesi-9 | -100 | -75 |
3. Uvavanyo loBulukhuni
| Ibanga | uRockwell | UBrinell |
| Ibanga loku-1 | B 85 | 163 |
| Ibanga lesi-3 | B 90 | 190 |
| Ibanga lesi-6 | B 90 | 190 |
| Ibanga lesi-7 | B 90 | 190 |
| Ibanga lesi-8 | — | — |
| Ibanga le-11 | B 90 | 190 |
4. Uvavanyo lokuThabatha
Uvavanyo olunye lokuthamba kufuneka lwenziwe kwiisampuli ezivela kwisiphelo ngasinye setyhubhu enye egqityiweyo yelothi nganye kodwa kungabi yile isetyenziselwa uvavanyo lweflare okanye lweflange.
5. Uvavanyo lweFlare (iityhubhu ezingenamthungo)
Uvavanyo olunye olukhanyayo kufuneka lwenziwe kwiisampuli ezivela kwisiphelo ngasinye setyhubhu enye egqityiweyo yelothi nganye, kodwa kungabi yile isetyenziselwa uvavanyo lokusila.
6. Uvavanyo lweFlange (iityhubhu ezidibeneyo)
Uvavanyo olunye lweflange kufuneka lwenziwe kwiisampuli ezivela kwisiphelo ngasinye setyhubhu enye egqityiweyo yelothi nganye, kodwa kungabi yile isetyenziselwa uvavanyo lokuthamba.
7. Uvavanyo lokuBuyela ezantsi
Kwiityhubhu ezidityanisiweyo, uvavanyo olunye lokuthamba olubuyela umva kufuneka lwenziwe kwisampuli nganye ukusuka kwi-1500 ft [460 m] yetyhubhu egqityiweyo.
Uvavanyo loMbane olungenamanzi okanye olungonakalisiyo
Umbhobho ngamnye kufuneka uvavanywe ngombane ngaphandle kokutshatyalalisa okanye uvavanywe ngamanzi ngokuhambelana neMigqaliselo A1016/A1016M.
Izicelo ze-ASTM A334 Steel Pipe
Ngokuyintloko isetyenziselwa ukuthutha ulwelo okanye iigesi ezifana negesi yendalo, ioyile, kunye nezinye iikhemikhali kumaqondo obushushu aphantsi.
1. Iinkqubo zemibhobho ye-Cryogenic: isetyenziswa kakhulu ekwakheni iinkqubo zemibhobho yokuthutha ulwelo oluyi-cryogenic (umz. igesi yendalo enyibilikisiweyo, i-nitrogen engamanzi). Ngenxa yeempawu zayo ezintle ze-cryogenic, iyakwazi ukugcina amandla oomatshini kunye nokuqina kumaqondo obushushu aphantsi kakhulu.
2. Izitshintshi zobushushu kunye nezikhuseli: Izitshintshi zobushushu kunye nezikhuseli zingasetyenziswa ngokufanelekileyo ukupholisa okanye ukufudumala imidiya yokusebenza, ingakumbi kumashishini eekhemikhali kunye neekhemikhali.
3. Imithambo yoxinzelelo: ingasetyenziselwa ukwenza imithambo yoxinzelelo eyenzelwe imisebenzi ye-cryogenic. Ezi mithambo zingasetyenziselwa ukugcina iikhemikhali ze-cryogenic okanye kwiinkqubo ezikhethekileyo zoshishino.
4. Iinkqubo nezixhobo zokukhenkcisa: Ezi tyhubhu zisetyenziselwa ukuthutha iifriji, ingakumbi apho kufuneka khona izinto ezimelana nobushushu obuphantsi.
Umgangatho oLinganayo we-ASTM A334
EN 10216-4: Igubungela iityhubhu zentsimbi ezingaxutywanga nezixutyiweyo, ezineempawu ezithile zobushushu obuphantsi.
I-JIS G 3460: inxulumene neetyhubhu zentsimbi ye-alloy zenkonzo ye-cryogenic.
GB/T 18984: isebenza kwiityhubhu zentsimbi ezingenamthungo kwiinqanawa zoxinzelelo lwe-cryogenic. Ichaza ngokweenkcukacha uyilo kunye nokuveliswa kweetyhubhu zentsimbi ezifanelekileyo kwiindawo ezishushu kakhulu.
Nangona le migangatho inokwahluka ngokweenkcukacha kunye neemfuno ezithile, iyafana kwinjongo yayo iyonke kunye nokusetyenziswa kwayo, oku kukuqinisekisa ukhuseleko kunye nokusebenza kwemibhobho yentsimbi kwiindawo eziguquguqukayo.
Iimveliso zethu eziNxulumeneyo
Ukususela oko yasekwa ngo-2014, iBotop Steel ibe ngumthengisi ophambili wemibhobho yentsimbi yekhabhoni eMntla China, eyaziwa ngenkonzo egqwesileyo, iimveliso ezikumgangatho ophezulu, kunye nezisombululo ezibanzi.
Le nkampani inikezela ngeendidi ngeendidi zeepayipi zentsimbi yekhabhoni kunye neemveliso ezinxulumene nazo, kuquka ipayipi yentsimbi engenamthungo, i-ERW, i-LSAW, kunye ne-SSAW, kunye noluhlu olupheleleyo lwee-fittings zepayipi kunye nee-flanges. Iimveliso zayo ezikhethekileyo ziquka ii-alloys ezikumgangatho ophezulu kunye neentsimbi ezingenasici ze-austenitic, ezenzelwe ukuhlangabezana neemfuno zeeprojekthi ezahlukeneyo zepayipi.
Iithegi: ASTM A334, umbhobho wentsimbi yekhabhoni, ASTM a334 gr 6, ASTM a334 gr 1.
Ixesha leposi: Meyi-20-2024