I-ASTM A501 Ibanga Bngumbhobho wesinyithi wekhabhoni odibeneyo nongenamthungo owenziwe ngobushushu onamandla okutsalwa angama-448 MPa (65,000 psi) kwiintlobo ngeentlobo zezicelo zesakhiwo.
I-ASTM A501yenzelwe ukwenziwa nokusebenza kweetyhubhu zesinyithi sekhabhoni ezitshisiweyo nezingenamthungo ezisetyenziselwa ulwakhiwo.
Ezi tyhubhu zentsimbi zinokuba mnyama (zingagqunywanga) okanye zibe yi-galvanized efakwe ngobushushu, le yokugqibela iye yandisa ukumelana nokugqwala ngenkqubo yokugaya i-galvanizing, nto leyo eyenza ukuba ifaneleke kwiimeko ezahlukeneyo zendalo.
Ezi pipe zentsimbi zisetyenziswa kakhulu kwiibhulorho, kwizakhiwo, nakwezinye izinto ezininzi ezisetyenziswa kwizakhiwo ngokubanzi.
I-ASTM A501 yahlula umbhobho wentsimbi ube ziiklasi ezintathu,ibakala A, ibakala B, kunye nebakala C.
Ibanga B lelona lisetyenziswa kakhulu kwiibanga ezintathu kuba libonelela ngeempawu ezilungelelanisiweyo kakuhle kwiindlela ezahlukeneyo zokwakha.
Intsimbi mayibe yenziwe nguinkqubo yokwenza intsimbi ye-basic-oxygen okanye ye-electric-arc-furnace.
Intsimbi inokwenziwa ngee-ingots okanye yenziwe ngentambo.
Xa iintsimbi zemigangatho eyahlukeneyo zifakwe i-stranded cast ngokulandelelana, umvelisi wentsimbi kufuneka achonge izinto eziguqukayo eziphumayo aze azisuse esebenzisa inkqubo emiselweyo eyahlula kakuhle iimigangatho.
Ityhubhu kufuneka yenziwe ngenye yezi nkqubo zilandelayo:ingenamthungo; ukuwelda nge-furnace-butt (ukuwelda okuqhubekayo); ukuwelda ngombane okumelanayo (ERW) okanye ukuwelda nge-arc engaphantsi komhlaba (SAW)kulandele ukufudumala kwakhona kulo lonke icandelo elinqamlezileyo kunye nokwenza ubushushu ngenkqubo yokunciphisa okanye yokubumba, okanye zombini.
Inkqubo yokuwelda ye-SAW yahlulwe kabiniI-LSAW(SAWL) kunye ne-SSAW (I-HSAW).
Ukwakheka kokugqibela kwesimo kufuneka kwenziwe ngenkqubo yokwakheka eshushu.
Kuya kuvunyelwa ukongeza unyango lobushushu oluqhelekileyo kwiityhubhu ezinobukhulu bodonga obungaphezulu kwe-13mm [1/2 intshi].
| Iimfuneko zeKhemikhali ze-ASTM A501 zeBanga B,% | |||
| Ukwakhiwa | Ibanga B | ||
| Uhlalutyo lobushushu | Uhlalutyo lweMveliso | ||
| C (Ikhabhoni)B | ubuninzi | 0.22 | 0.26 |
| I-Mn (iManganese)B | ubuninzi | 1.40 | 1.45 |
| I-P (iPhosphorus) | ubuninzi | 0.030 | 0.040 |
| S(iSulfur) | ubuninzi | 0.020 | 0.030 |
| I-Cu (ubhedu)B (xa intsimbi yobhedu ichaziwe) | umzuzu | 0.20 | 0.18 |
| BKunciphiso ngalunye lwe-0.01 yepesenti ngaphantsi komlinganiselo ochaziweyo wekhabhoni, ukunyuka kwe-0.06 yepesenti ngaphezu komlinganiselo ochaziweyo we-manganese kuvumelekile, ukuya kuthi ga kwi-1.60% ngohlalutyo lobushushu kunye ne-1.65% ngohlalutyo lwemveliso. | |||
Uhlalutyo lwemveliso kufuneka lwenziwe kusetyenziswa iisampulu zovavanyo ezithathwe kubude obubini betyhubhu ukusuka kwinxalenye nganye yobude obungama-500, okanye inxalenye yayo, okanye iziqwenga ezibini zesitokhwe esigoqekileyo esithe tyaba ukusuka kwinxalenye nganye yobungakanani obuhambelanayo besitokhwe esigoqekileyo esithe tyaba.
Iisampulu zokutyhafa mazihambelane neemfuno ezifanelekileyo zeNdlela zoVavanyo kunye neeNkcazelo A370, iSihlomelo A2.
| Iimfuneko ze-ASTM A501 Grade B Tensile | |||
| Uluhlu | Ubukhulu bodonga mm [ngaphakathi] | Ibanga B | |
| Tensile strength, min, psi[MPa] | Konke | 65000 [448] | |
| Unikeze Amandla, min, psi[MPa] | ≤25 [1] | 46,000 [315] | |
| ＞25 [1] kunye no-≤ 50 [2] | 45,000 [310] | ||
| ＞50 [2] kunye no-≤ 76 [3] | 42,500 [290] | ||
| ＞76 [3] kunye no-≤ 100 [4] | 40,000 [280] | ||
| Ukwandiswa, ubuncinci, % | — | 24 | |
| Amandla empembelelo | imizuzu,umndilili, ft/Ibf [J] | — | 20 [27] |
| imizuzu,umntu ongatshatanga, ft/Ibf [J] | — | 14 [19] | |
Iisampulu zovavanyo loxinzelelo mazibe ziisampulu zovavanyo olude olupheleleyo okanye iisampulu zovavanyo lwe-longitudinal strip.
Kwimibhobho edibeneyo, naziphi na iisampuli zovavanyo lwe-longitudinal strip kufuneka zithathwe kwindawo ekwi-90° ubuncinane ukusuka kwi-weld kwaye mazilungiswe ngaphandle kokusikwa kubude begeyiji.
Uvavanyo lwe-longitudinal stripiisampulu kufuneka zisuswe zonke izikhonkwane.
Iisampulu zovavanyo loxinzelelo akufuneki zibe neziphene zomphezulu eziya kuphazamisana nokugqitywa ngokufanelekileyo kweempawu zoxinzelelo.
Ubukhulu bodonga obuyi-≤ 6.3mm [0.25in] abufuni vavanyo lokuchaphazela.
| Ukunyamezelana kwe-ASTM A501 Dimensional | ||
| Uluhlu | ububanzi | Phawula |
| Ububanzi obungaphandle (OD) | ≤48mm (1.9 in) | ±0.5mm [1/48 intshi] |
| ＞50mm (ii-inthi ezimbini) | ± 1% | |
| Ubukhulu Bodonga (T) | Ubukhulu bodonga obuchaziweyo | ≥90% |
| Ubunzima | ubunzima obuchaziweyo | 96.5% -110% |
| Ubude (L) | ≤7m (22 ft) | -6mm (1/4in) - +13mm (1/2in) |
| 7-14m (22-44 ft) | -6mm (1/4in) - +19mm (3/4) | |
| Ukuthe tye | Ubude bukwiiyunithi zobukhosi (ft) | I-L/40 |
| Iiyunithi zobude zi-metric (m) | I-L/50 | |
Imibhobho yolwakhiwo mayingabi naziphene kwaye ibe nokugqitywa okugudileyo okubangelwa yinkqubo yokwenziwa kwe-hot rolling.
Xa ubunzulu beziphene kumphezulu wombhobho budlula i-10% yobukhulu bodonga obuqhelekileyo, ezi ziphene ziya kuthathwa njengezingahambelaniyo. Ukulungiswa ngokuwelda kuya kuvunyelwa kuphela xa kuvunyelwene phakathi komthengi kunye nomenzi. Ngaphambi kokulungiswa ngokuwelda, iziphene eziza kulungiswa kufuneka zisuswe ngokupheleleyo ngeendlela zokusika okanye zokusila.
Ukuze umbhobho wolwakhiwo ube yi-hot-dip galvanized, olu phawu kufuneka luhambelane neemfuno ezifanelekileyo zeNkcazeloI-ASTM A53.
Ubude ngabunye bombhobho wolwakhiwo kufuneka buphawulwe ngendlela efanelekileyo, efana nokuqengqeleka, ukunyathela, ukunyathela, okanye ukupeyinta.
Uphawu lwe-ASTM A501 kufuneka lube nolwazi olulandelayo ubuncinane:
Igama lomenzi
Uphawu okanye uphawu lwentengiso
Ubungakanani
Igama lomgangatho (unyaka wokupapashwa awufuneki)
Ibanga
Kwiityhubhu zesakhiwo ezingaphantsi kwama-50 mm [2 in] OD, kuvumelekile ukuphawula ulwazi lwentsimbi kwileyibhile eqhotyoshelwe kwiphakheji nganye.
Intsimbi ye-ASTM A501 Grade B idibanisa amandla kunye nokuguquguquka kunye nenkqubo yokuvelisa eshushu, nto leyo eyenza ukuba ifaneleke kwiintlobo ngeentlobo zezicelo zesakhiwo.
Ukwakha kunye nokwakha: Isetyenziswa rhoqo kwizakhiwo nasekwakhiweni apho kufuneka amandla aphezulu kunye nokuqina kwezinto eziqinileyo. Oku kuquka izakhiwo, amabala emidlalo, iibhulorho, kunye nezinye izakhiwo.
Izixhobo zoshishinoNgenxa yokuba inamandla aphezulu, ifanelekile ukusetyenziswa kwizakhiwo zoshishino ezifana neefektri kunye neendawo zokugcina impahla apho ulungelelwaniso lwesakhiwo lubaluleke kakhulu.
Iziseko zothutho: olu hlobo lusetyenziswa ekwenzeni iziseko zothutho, kuquka izikhululo zikaloliwe, izikhululo zeenqwelo-moya, kunye neendlela zokudlula ezindleleni ezinkulu.
Izinto eziyinxalenye yesakhiwo: Ikwasetyenziswa kakhulu ekwenzeni izinto zokwakha ezifana neekholamu, imiqadi, kunye nee-trusses, ezenza isakhelo sezakhiwo ezahlukeneyo.
Ukuveliswa kwezixhobo: Kwimveliso yezixhobo ezinzima kunye noomatshini, ingasetyenziselwa iindawo ezifuna izinto zokwakha ezinamandla aphezulu.
Umenzi kufuneka anike umthengi isatifikethi sokuthobela imithetho esichaza ukuba imveliso ithathwe isampulu, yavavanywa, yaze yahlolwa ngokuhambelana nale ngcaciso kunye nazo naziphi na ezinye iimfuno ezichazwe kumyalelo wokuthenga okanye kwisivumelwano kwaye zonke ezo mfuno zifezekisiwe. Isatifikethi sokuthobela imithetho kufuneka siquke inani elithile kunye nonyaka wokukhutshwa kwayo.
I-Botop Steel ngumvelisi kunye nomthengisi weepayipi zentsimbi zekhabhoni eziweldiweyo ezikumgangatho ophezulu ezivela eTshayina, ikwangumthengisi weepayipi zentsimbi ezingenamthungo.
I-Botop Steel izimisele kakhulu kumgangatho kwaye isebenzisa ulawulo oluqinileyo kunye novavanyo ukuzeukuqinisekisa ukuthembeka kwemveliso. Iqela layo elinamava libonelela ngezisombululo ezenzelwe wena kunye nenkxaso yeengcali, kugxilwe ekwanelisekeni kwabathengi. Silangazelela ukusebenza nawe.
