Ukungabikho komthungo wokuwelda kulwakhiwo lwepayipi engenamthungo kubangela amandla aphuculweyo kunye nokukwazi ukumelana noxinzelelo, kodwa ulwakhiwo lwepayipi enemthungo lubonelela ngenzuzo yeendleko, eqala kwi-20% ukuya kwi-50% ngelixa ifanelekile kwiizicelo ezininzi ezifuna uxinzelelo oluphantsi ukuya koluphakathi. Ukhetho oluchanekileyo lufuna ukuba uvavanye iimfuno zakho zokusebenza kunye nemigangatho yekhowudi efanelekileyo kunye nezixhobo zakho zemali ezikhoyo, endaweni yokucinga ukuba iipayipi ezingenamthungo zibonelela ngokusebenza okungcono kunezinye iindlela.
Ngowama-2023, inkampani yaseTshayina i-EPC yathumela iikhilomitha ezilishumi elinesibini zombhobho odibeneyo we-ERW kwiprojekthi yokukhupha ityuwa eSaudi Arabia. Umthengi wala ukuthunyelwa konke kuba iinkcukacha zombhobho, ezifihliwe kwisihlomelo sesivumelwano, zazifuna ukwakhiwa okungenamthungo ngokwe-API 5L PSL2. Iindleko zokutshintshwa zizonke zifikelele ngaphezulu kwe-$180,000, ezaziquka iindleko zokuhanjiswa ngokukhawuleza komoya. Umbhobho ngokwawo wawuhlangabezana nemigangatho yobugcisa efunekayo yokusetyenziswa kwawo. Ukusilela kwenzeke ngenxa yeenkcukacha ezingachanekanga endaweni yezinto ezingalunganga.
Eli nqaku libonelela ngothelekiso olupheleleyo phakathi kombhobho ongenamthungo nowelding ngokuvavanya iindlela zabo zokwenza. Uza kufumanisa inkqubo yokuvelisa uhlobo ngalunye lombhobho kunye neempawu zalo zamandla kunye namaxabiso azo, kunye nokumelana nokugqwala, kunye neemeko ezithile ezifuna ukuba ukhethe uhlobo olunye lombhobho ngaphezu kolunye. Uza kufumana isakhelo esisebenzayo sokwenza izigqibo, onokusisebenzisa kumsebenzi wakho weprojekthi ezayo.
IItrakthi ezibalulekileyo
- Umbhobho ongenamthungo awunamthungo wokuwelda, nto leyo eyinika amandla afanayo aphezulu kunye nokusebenza ngcono kwiindawo ezinoxinzelelo oluphezulu, ubushushu obuphezulu, kunye neemeko ezirhabaxa.
- Umbhobho odibeneyo wenziwa ngepleyiti yentsimbi eqengqelekayo okanye i-coil kwaye idibanise imiphetho, nto leyo eyenza ukuba ingabizi kakhulu kwaye ifumaneke ngobubanzi obukhulu.
- Phantsi kwe-ASME B31.3, umbhobho ongenamthungo uphethe i-joint efficiency factor ye-E = 1.00, ngelixa umbhobho odibeneyo we-ERW uphethe i-E = 0.85.
- Umbhobho odibeneyo wanamhlanje onokuhlolwa kwe-100% ye-ultrasound okanye i-radiographic yomthungo we-weld uyamkelwa ngakumbi kwiinkonzo ezazifuna umbhobho ongenamthungo ngaphambili.
- Ukhetho luqhutywa ziikhowudi zemibhobho, iimeko zokusebenza, ukuchatshazelwa kukugqwala, kunye nohlahlo lwabiwo-mali lweprojekthi, kungekhona uhlobo lombhobho kuphela.
- Kwizicelo zentsimbi engagqwaliyo, umthungo we-weld unokudala ukuvakala kwindawo echaphazelekileyo bubushushu, okunokufuna unyango lobushushu emva kokuthungwa okanye ukukhetha ukhetho olungenamthungo.
Ukuba ufuna uncedo ekukhetheni uhlobo olufanelekileyo lombhobho kwiprojekthi yakho, iqela lethu libonelela ngeengcebiso zobugcisa zokukhetha izixhobo kunye nokuhlolwa kweenkcukacha.
Yintoni umahluko phakathi kombhobho ongenamthungo kunye nombhobho odibeneyo?
Umahluko oyintloko phakathi kwezi zinto zimbini kulula ukuwuqonda. Umbhobho ongenamthungo wenziwa ngenkqubo yokwenza i-billet epheleleyo yentsimbi ibe ngumbhobho ngaphandle kokudala naluphi na uqhagamshelo oludibeneyo. Inkqubo yokwenza umbhobho odibeneyo ibandakanya ukubumba ipleyiti yentsimbi okanye umcu ube sisilinda kunye nokudibanisa imiphetho ngokuhlanganisa.
Umahluko wendlela yokuvelisa ukhokelela kwiimpembelelo ezininzi ezichaphazela amandla, iindleko, ukusasazwa kwemveliso, kunye nokufana kobungakanani bemveliso. Iindlela ezahlukeneyo zokwenza imveliso zohlobo ngalunye zikhokelela kwiziphumo ezahlukeneyo zokusebenza kwiimeko ezithile zokusetyenziswa.
Indlela Eyenziwa Ngayo Imibhobho Engenamthungo
Umbhobho ongenamthungo uqala njenge-billet yentsimbi eqinileyo ejikelezayo. Abaphandi bafudumeza i-billet ukuya kuma-degrees Celsius ayi-1,200 ngaphambi kokuba basebenzise umbhobho wokubhoboza ojikelezayo ukwenza umngxuma ophakathi ngesinyithi kwinkqubo yaseMannesmann. Abasebenzi bayolula i-billet eqengqelekayo de bafikelela kububanzi obufunekayo bangaphandle kunye nobukhulu bodonga.
Umbhobho wentsimbi unecandelo elinye lesinyithi eliqhubekayo elisusa imfuneko yomthungo we-longitudinal weld. Ulwakhiwo lwengqolowa lombhobho ongenamthungo lugcina indlela yawo engaphazanyiswa kuyo yonke ububanzi bombhobho odala iimpawu ezihambelanayo zoomatshini.
Le nkqubo ifuna ukusetyenziswa kwamandla amaninzi ngelixa ivelisa imveliso ephantsi. Umatshini wokugaya iipayipi ongenamthungo uhlala uguqula kuphela i-65 ukuya kwi-75 ekhulwini yobunzima be-billet ibe yipayipi egqityiweyo. Izinto eziseleyo zijika zibe sisikali, zilungiswe kwaye zicutshungulwe. Izinga eliphantsi lemveliso libangela iindleko eziphezulu zemveliso yokwenziwa kweepayipi ezingenamthungo.
Le nkampani ivelisa iindlela ezinobukhulu obulinganiselweyo. Uninzi lweemibhobho ezingenamthungo zinokuvelisa ukuya kuthi ga kwi-24 intshi (610 mm) ububanzi bangaphandle. Ukuveliswa kobukhulu obukhulu kuba yinto engenakwenzeka ngenxa yezi zinto zimbini eziquka imida kubukhulu be-billet kunye nemida kumandla okubhoboza.
Indlela Eyenziwa Ngayo Imibhobho Edibeneyo
Umbhobho odibeneyo uqala njengepleyiti yentsimbi, umcu, okanye ikhoyili. Izinto ezisetyenzisiweyo zisongwa zibe yimilo yesilinda, kwaye imiphetho emide idityaniswe ngokudityaniswa.
Iindlela ezintathu eziphambili zokuwelda zisetyenziswa:
- I-ERW (i-Electric Resistance Welded): Umbane osebenza rhoqo ufudumeza imiphetho yentsimbi, ize emva koko icinezelwe kunye. I-ERW yeyona ndlela ixhaphakileyo yobubanzi bepayipi ukuya kuthi ga kwi-intshi ezingama-24.
- LSAW (Longitudinal Submerged Arc Welded): Ipleyiti yentsimbi yenziwa ibe sisilinda, kwaye umthungo we-longitudinal udityaniswa kusetyenziswa i-arc welding engaphantsi komhlaba. I-LSAW isetyenziselwa umbhobho omkhulu, oqhele ukuba yi-16 ukuya kwi-60 intshi.
- I-SSAW (I-Spiral Submerged Arc Welded): Ikhoyili yentsimbi yenziwa ibe yi-spiral, kwaye umthungo we-spiral udityaniswa rhoqo. I-SSAW isetyenziselwa iidayamitha ezinkulu kakhulu kunye nemibhobho emide.
Ukwenziwa kwemibhobho edibeneyo kufikelela ekusetyenzisweni kwezinto eziphezulu kakhulu. Umatshini wokugaya imibhobho odibeneyo udla ngokuguqula ngaphezulu kwama-90 ekhulwini obunzima bekhoyili okanye ipleyiti ibe yipayipi egqityiweyo. Le nkqubo ikwakhawuleza kwaye ayisebenzisi amandla amaninzi. Ezi zinto zenza umbhobho odibeneyo ube noqoqosho olukhulu.
Ukuguquguquka kobubanzi yenye inzuzo. Ngenxa yokuba umbhobho odibeneyo uqala kwipleyiti okanye kwikhoyili, ungaveliswa ngobubanzi obukhulu kakhulu, obuziisentimitha ezili-100 nangaphezulu, obungenakwenziwa njengombhobho ongenamthungo.
Umbhobho ongenamthungo vs oWelded: Uthelekiso olusecaleni
| Ingxaki | Umbhobho ongenamthungo | Umbhobho welding | amaNqaku |
|---|---|---|---|
| Manufacturing | Ukubhoboza okushushu okujikelezayo okuvela kwi-billet eqinileyo | Ipleyiti yokuqengqeleka neyokuwelda, umcu, okanye ikhoyili | I-Seamless ayinamthungo wokuwelda |
| Weld Seam | nanye | I-Longitudinal (ERW, LSAW) okanye i-spiral (SSAW) | Umthungo unika umbhobho odibeneyo indawo ebuthathaka |
| amandla | Amandla aphezulu afanayo; iipropati ze-isotropic | Ukuqina okuhle; umthungo uyinto enokubangela uxinzelelo | I-ERW yanamhlanje inciphisa umsantsa |
| Uxinzelelo loxinzelelo | Ilungele kakhulu uxinzelelo oluphezulu kunye nobushushu obuphezulu | Ifanelekile kuxinzelelo oluphantsi ukuya koluphakathi | Ingenamthungo imelana noxinzelelo oluphezulu olungaphezulu kwama-20% |
| Ukusebenza kakuhle ngokudibeneyo (ASME B31.3) | E = 1.00 | E = 0.85 (ERW) | I-Welded ifuna udonga olutyebileyo ukuze ikwazi ukumelana noxinzelelo olufanayo |
| Nokumelana Resistance | Ingcono; akukho mthungo wokuhlasela | Umthungo we-Weld kunye ne-HAZ zinokuba sengozini | I-PWHT inokunciphisa iingxaki ze-HAZ |
| ixabiso | Ixabiso liphezulu ngama-20-50% kune-welded | Uqoqosho ngakumbi | Ixabiso leyunithi kuphela; i-TCO inokwahluka |
| Ubungakanani boLinganiso | Ngokwesiqhelo ukuya kuthi ga kwi ~24″ (610 mm) OD | Iguquguquka kakhulu; Ububanzi obuyi-100″+ bunokwenzeka | Iidayamitha ezinkulu zifuna i-welded |
| Unyamezelo lokutyeba kodonga | +/-12.5% (inokwahluka ngenxa yokungaqheleki) | +/-10% (ERW) okanye +/-8% (LSAW) | I-Welded iyafana ngakumbi |
| Isivuno sezinto eziphathekayo | 65-75% yobunzima be-billet | Ngaphezulu kwe-90% yobunzima bekhoyili okanye ipleyiti | Inzuzo ephantsi inyusa iindleko ezingenamthungo |
| Ixesha lead | Iiveki ezi-8-16 (eziqhelekileyo); iiveki ezingama-20 nangaphezulu (ezikhethekileyo) | Iiveki ezi-4 ukuya kwezili-10; zihlala zikhona | I-Seamless ifuna ukuthengwa kwe-billet |
| Ii-Applications ezilungileyo | Imigca yoxinzelelo oluphezulu, iibhoyila, ukucubungula iikhemikhali, inyukliya | Izakhiwo, iinkqubo zamanzi, i-HVAC, imibhobho emikhulu | Isicelo sichaza ukhetho |
Le theyibhile ibonisa umahluko osisiseko phakathi kwezinto ezimbini, kodwa ifuna idatha yamanani ukuze iqonde intsingiselo yazo.
Umbhobho odibeneyo ubonisa ukusebenza okuphezulu ngenxa yokukwazi kwawo ukuhlangabezana neemfuno zobukhulu bodonga. Inkqubo yokubhoboza idala iziphumo ezingalawulekiyo ezibangela ukuba umbhobho ongenamthungo ufumane ukungaqhelekanga kunye nokuguquguquka kobukhulu bodonga kulo lonke ujikelezo lwayo. Inkqubo yokuqengqeleka imisela ulawulo oluqinileyo olumisela ubukhulu bodonga lombhobho odibeneyo ngeenkcukacha zepleyiti okanye umcu. Kwizicelo ezifuna ubukhulu bodonga obuchanekileyo, oku kunokuba yinto ebalulekileyo ekufuneka iqwalaselwe.
Umbhobho ongenamthungo unika ukusebenza okungcono kunembhobho edibeneyo kuba awunawo umthungo we-weld, okhusela ukulayisha okujikelezayo kunye nomonakalo wokugqwala. Umthungo wembhobho edibeneyo uvelisa indawo echaphazeleka bubushushu (HAZ) ephuhlisa ipateni eyahlukileyo yesakhiwo se-microstructure. Ummandla we-HAZ wombhobho odibeneyo uphuhlisa ube yindawo yokuqala yokuqhekeka phantsi kweemeko zenkonzo emuncu ene-hydrogen sulfide kunye noxinzelelo lwe-cyclic.
Uthelekiso lwaMandla kunye noXinzelelo
Umbhobho ongenamthungo ngokubanzi unika amandla aphezulu okutyhala kunye nomthamo ongcono woxinzelelo kuba akukho mthungo we-weld osebenza njengendawo yokusilela enokubakho. Phantsi kweKhowudi yeMibhobho yeNkqubo ye-ASME B31.3 , umbhobho ongenamthungo unikwa i-joint efficiency factor ye-E = 1.00, ngelixa umbhobho we-ERW welded unikwa i-E = 0.85.
Kuthetha ukuthini oko xa kusenziwa? Umbhobho odibeneyo ufuna ubukhulu bodonga obudlula imfuneko yombhobho ongenamthungo kuba udinga ubukhulu obungaphezulu nge-18% ukuze ufikelele kumanqanaba okhuseleko afanayo emibhobho yomibini enomgangatho ofanayo wezinto. Umbhobho ongenamthungo ubonisa ukumelana okungcono koxinzelelo kuba ugcina ubukhulu bodonga obufanayo neminye imibhobho.
Umsantsa wokusebenza unciphe kakhulu.
Itekhnoloji yokudibanisa ye-ERW (HFI) yanamhlanje, kunye nokuhlolwa kwe-ultrasonic okanye i-radiographic yomthungo we-weld, kudala umbhobho we-weld obonisa ukusebenza okuthembekileyo kwiisicelo ezininzi ezazifuna ukwakhiwa okungenamthungo ngaphambili. Iinkampani ezininzi zobunjineli zitshintshe iimfuno zazo ukuze zivumele umbhobho we-welded one-seam epheleleyo yokuvavanya ukungasebenzi kolwelo lweCandelo D ngokwemigangatho ye-ASME B31.3, egubungela izinto ezingatshiyo nezingenatyhefu ezisetyenziswa kumaqondo obushushu aphakathi kunye noxinzelelo.
Eyona nto ibalulekileyo ifuna ukufanisa ukhetho lombhobho nenkonzo ecetywayo. Eli shishini lithatha umbhobho ongenamthungo njengokhetho oluqhelekileyo, olumele lusetyenziswe ngabakhi bombhobho xa bethumela i-hydrocarbon enoxinzelelo oluphezulu, iityhubhu zebhoyila kunye nokusetyenziswa kwenyukliya, kunye nenkonzo ye-cryogenic. Eli shishini lithatha umbhobho we-welded wanamhlanje, ohlolwa ngokufanelekileyo, njengowaneleyo ekusasazweni kwamanzi, kwizibonelelo zesakhiwo, kwi-HVAC, nakwiinkqubo zemibhobho ezisetyenziswa ngokubanzi.
Ukwakhiwa kombhobho ongenamthungo kuvumela ukuba kubekho iziphene ngexesha lokwenziwa. Inkqubo yokubhoboza inokuvelisa ii-laminations zangaphakathi, izinto ezibandakanyiweyo kunye neendawo ezingaqhelekanga. Inkqubo yokuhlolwa efanelekileyo ifuna uvavanyo lwe-hydrostatic, uvavanyo lwe-ultrasonic, kunye nokuhlolwa kwe-eddy current kuzo zonke iintlobo zemibhobho.
Imigangatho kunye neemfuno zovavanyo
Zombini iipayipi ezingenamthungo kunye nezihlanganisiweyo kufuneka zihlangabezane neemfuno zovavanyo oluqatha phantsi kwemigangatho yazo efanelekileyo. Uvavanyo lwe-hydrostatic lufuneka ngokweenkcukacha ezininzi, kuquka i-ASTM A53, i-ASTM A106, kunye ne-API 5L. Uxinzelelo lovavanyo ludla ngokubalwa kwi-60 ukuya kwi-80 yepesenti yamandla amancinci akhankanyiweyo.
Iimfuno zovavanyo olungatshabalalisiyo (NDT) zahlukile ngohlobo lombhobho kunye nomgangatho:
- Umbhobho ongenamthungoUvavanyo lwe-Ultrasonic (UT) lweempazamo zexesha elide, uvavanyo lwamandla e-eddy lweempazamo zomphezulu, kunye novavanyo lwe-hydrostatic zizinto eziqhelekileyo. Ezinye iinkcukacha zifuna i-UT yomzimba wonke.
- Umbhobho odityanisiweyoUkongeza kuvavanyo lwe-hydrostatic, umthungo we-weld kufuneka uhlolwe ngeendlela ze-ultrasonic okanye ze-radiographic. I-API 5L PSL2 ifuna ukuhlolwa komthungo we-100% kumbhobho wentambo we-welded.
Xa uvavanya umahluko kwishedyuli yemibhobho kunye novavanyo loxinzelelo, jonga isikhokelo sethu malunga nomahluko kwishedyuli yemibhobho ukuze ufumane ulwazi oluneenkcukacha ngobukhulu bodonga kunye nedatha yoxinzelelo.
Uthelekiso lweendleko: Kutheni iPipe engenamthungo ibiza ngaphezulu
Umbhobho ongenamthungo udla ngokubiza ngaphezulu ngama-20 ukuya kuma-50 ekhulwini kunembhobho edibeneyo enobukhulu obuqhelekileyo, inqanaba, kunye neshedyuli. Kwezinye ii-alloys ezikhethekileyo kunye nobubanzi obukhulu, iprimiyamu inokuba phezulu nangakumbi.
Ziliqela izinto ezibangela lo mahluko kwiindleko:
- Ukusebenza kakuhle kwezinto eziluhlaza: Imveliso engenamthungo iguqula kuphela i-65 ukuya kwi-75 ekhulwini ye-billet ibe yipayipi egqityiweyo. Imveliso edibeneyo iguqula ngaphezulu kwe-90 ekhulwini yekhoyili okanye ipleyiti.
- Ukusetyenziswa kwamandla: Ukufudumeza i-billet eqinileyo ukuya kubushushu obuhlabayo kunye nokugcina amaqondo obushushu aqengqelekayo kufuna amandla angaphezulu kakhulu kunokwakha nokuwelda umcu obandayo okanye ogoqekileyo ofudumeleyo.
- Umgangatho wemveliso: Iifektri zepayipi ezidityanisiweyo zisebenza ngesantya esiphezulu kwaye zivelisa iimitha ezithe tyaba ngeyure.
- Ukufumaneka kweBillet: Umbhobho ongenamthungo osemgangathweni ophezulu ufuna iibhilethi ezicocekileyo nezingenamthungo. Ubonelelo lweebhilethi lunokuncipha, ingakumbi kwii-alloys ezikhethekileyo.
- Iiprimiyamu zobukhulu: Umbhobho omkhulu ongenamthungo awufumaneki kwaye ubiza kakhulu kuba zimbalwa iifektri ezinokuwenza.
Nangona kunjalo, ixabiso leyunithi alilo ibali elipheleleyo.
Iindleko ezipheleleyo zobunini
Iindleko zobunini zizonke zezicelo ezibalulekileyo ziya kumisela ukuba loluphi ukhetho phakathi kombhobho ongenamthungo nombhobho odibeneyo oluya kuba luncedo ngakumbi. Iindleko zokuvala indawo kunye nokutshintsha imibhobho edibeneyo eqhekeka kwimithungo yayo ngexesha lokusebenza koxinzelelo oluphezulu ziya kudlula naluphi na ukonga kwezinto zokuqala. Umbhobho ongenamthungo unika ukumelana okungcono kokugqwala kunemibhobho edibeneyo, okuvumela ixesha elide lokusebenza kunye nokunciphisa iimfuno zokugcinwa kwindawo emanzi kunye neemeko zaselwandle.
Umgca wokuhambisa igesi yendalo usebenza ngoxinzelelo lwe-1200 psi. Ixabiso lombhobho ongenamthungo lifikelela kwi-45 ngemitha, ngelixa imibhobho edibeneyo ihlawulisa i-30 ngemitha, oko kuthetha iprimiyamu ye-50%. Umahluko wokuqala weendleko ufikelela kwi-150000 kumgama weekhilomitha ezili-10. Ukusilela komthungo wokufakelwa kuya kuvala imisebenzi kangangeentsuku ezintathu kwiziko lokucubungula elilahlekelwa yi-150000 ngosuku kwimveliso. Isiganeko esinye sisusa ukonga kwezinto ngelixa sidala ingozi yokhuseleko kuba ukusilela komthungo wokufakelwa kuya kuvala imisebenzi kangangeentsuku ezintathu kwiziko lokucubungula elilahlekelwa yi-80000 ngosuku kwimveliso.
Iingenelo zoqoqosho zepayipi edibeneyo ziyacaca kwiindlela ezingezizo ezibalulekileyo. Isityalo sokucoca amanzi okanye inkqubo ye-HVAC yorhwebo ayifuni mandla oxinzelelo okanye umda wokugqwala wepayipi engenamthungo. Inkcazo yepayipi engenamthungo kwezi nkonzo ibonisa inkcitho engabizi kakhulu.
IGunya laManzi likaMasipala waseShandong lifune imigca yokungenisa amanzi engama-intshi angama-48 kwidama elitsha ngo-2024. Akukho mbhobho ungenamthungo kuloo bubanzi. Iqela lobunjineli likhethe umbhobho we-ASTM A53 Grade B odityaniswe ne-LSAW, abawufumene emva kweeveki ezintandathu ngexabiso elimalunga nesinye kwisihlanu salo naliphi na isisombululo esingenamthungo sethiyori. Lo mbhobho usebenze kakuhle ukusukela oko waqala ukusebenza.
Ukumelana nokugqwala kunye neWeld Seam Factor
Ukuziphatha kokugqwala yindawo apho ubukho bomthungo we-weld budala umahluko wokwenene.
Inkqubo yokuhlanganisa imisela indawo echaphazeleka bubushushu (HAZ) kwipayipi edibeneyo, eqala kumthungo we-weld. I-HAZ inesakhiwo esahlukileyo kunesesinyithi esisisiseko. Kwisinyithi sekhabhoni, lo mahluko uphumela kutshintsho oluncinci olungenzi iingxaki ezinkulu zokugqwala kwiimeko ze-pH ezingathathi cala.
Izinto ekufuneka uziqwalasele xa usebenzisa umthungo we-Weld weld yensimbi engagqwaliyo
Imeko iba nzima ngakumbi kumbhobho wentsimbi engagqwaliyo ngenxa yenkqubo yawo entsonkothileyo yemibhobho. Amaqondo obushushu aphezulu ngexesha lokuwelda anokubangela ukuna kwe-chromium carbide kwimida yeenkozo kwi-HAZ. Le nkqubo ikhokelela ekuncipheni kwe-chromium kwiindawo ezijikeleze ii-carbides, nto leyo ekhokelela ekunciphiseni ukhuseleko nxamnye nokugqwala. Le nto yaziwa ngokuba kukuziva.
Iindawo ezithile zikhokelela ekwandeni kokunganyamezelani kokugqwala phakathi kwe-granular kwiindawo ze-weld seams nakwiindawo ze-HAZ ngenxa yokusabela. Isisombululo esiqhelekileyo yi-post-weld heat treatment (PWHT), abantu abayibiza ngokuba yi-solution annealing kuba iphinda inyibilike i-chromium carbides ukuze ibuyisele ukumelana nokugqwala okufanayo. Inkcazo ye-PWHT njengendlela yonyango kwizicelo ezibalulekileyo zentsimbi engagqwali.
Amanqanaba ekhabhoni aphantsi afana ne-304L kunye ne-316L anciphisa umngcipheko wokuziva kuba umxholo wawo ophantsi wekhabhoni uthintela ukwakheka kwe-chromium carbide. Amanqanaba azinzileyo afana ne-321 kunye ne-347 aqulathe i-titanium okanye i-niobium, ekhetha ukwenza ii-carbides kwaye ikhusele i-chromium kwi-matrix.
I-HAZ kumbhobho odibeneyo iba sesichengeni sokuqhekeka koxinzelelo lwe-sulfide xa iindawo zenkonzo ye-sour zine-hydrogen sulfide. Yingakho iinkcukacha ezininzi zeoyile negesi zifuna umbhobho ongenamthungo kwiintambo zenkonzo ye-sour, okanye umbhobho odibeneyo onemida yobunzima be-HAZ engqongqo kunye ne-NDT epheleleyo.
Umahluko phakathi komhlwa phakathi kombhobho ongenamthungo nowenziwe ngentsimbi uba yinto engabalulekanga kwinkonzo yamanzi ngokubanzi kunye nokuvezwa komoya kunye neendawo zeekhemikhali ezingenabungozi. Zombini zisebenza kakuhle xa zichazwe kwinqanaba elifanelekileyo lokusingqongileyo.
Umbhobho wentsimbi engenamthungo kunye neWelded Stainless
Uninzi lwamanqaku malunga nombhobho othungelweyo kunye nowelding agxile kwintsimbi yekhabhoni. Kwiiklasi zentsimbi engagqwaliyo , umthungo welding udala ezinye izinto ezichaphazela ukukhethwa kwemigangatho kunye neenkcukacha.
| kwiBanga | Izicelo ezingenamthungo | Izicelo eziWelding | Ukuqwalaselwa Okubalulekileyo |
|---|---|---|---|
| 304 | Ukulungiswa kokutya okunoxinzelelo oluphezulu, amayeza | Inkonzo yokutya ngokubanzi, imibhobho yolwakhiwo, kunye neyococeko | I-Welded 304 iyamkeleka kwiinkonzo ezininzi; sebenzisa i-304L okanye i-PWHT kwiindawo zokuwelda ezirhabaxa |
| 316 | Ulwandle, ukucubungula iikhemikhali, ukuvezwa kwekloride | Inkonzo yekhemikhali ngokubanzi, uyilo lwezakhiwo, udonga olukhulu olunemitha | I-Seamless ithintela i-HAZ kwinkonzo ye-chloride ebalulekileyo; i-welded 316 ene-PWHT isetyenziswa kakhulu |
| 2205 I-Duplex | Ukucutshungulwa kweoyile negesi, ukususwa kwetyuwa, i-chloride ephezulu | Unyango lwamanzi, intlama kunye nephepha, isakhiwo | Amandla aphezulu avumela iindonga ezincinci; i-mthungo ikhethwa xa kusenziwa inkonzo enobumuncu obuphezulu |
Ukuze ufumane uthelekiso oluneenkcukacha lweeklasi ezimbini eziqhelekileyo, jonga uthelekiso lwethu lwe-304 vs 316. Zombini iiklasi ziyafumaneka ngokwakhiwa okungenamthungo nokwelukiweyo, kodwa iimeko zenkonzo kufuneka ziqhubele phambili ukhetho.
Ngokubanzi, umbhobho wentsimbi engagqwaliyo edityanisiweyo ufanelekile kwiindlela ezininzi zokulungisa ukutya, uyilo lwezakhiwo, kunye nokusetyenziswa kweekhemikhali ezisebenzisa uxinzelelo oluphantsi ukuya koluphakathi. Umbhobho wentsimbi engagqwaliyo engenamthungo ukhethwa kwiinkonzo ezisebenzisa uxinzelelo oluphezulu, ubushushu obuphezulu, okanye ukubola apho ukusasazeka kwe-HAZ kungenakuncitshiswa ngokupheleleyo. Kwiindawo ezivezwe emanzini nasekhloride, umbhobho wentsimbi engagqwaliyo we-316 ususa ubuthathaka bomthungo we-weld ngokupheleleyo.
Izicelo: Apho Uhlobo ngalunye lwePipe lugqwesa khona
Izicelo ezilungileyo zePipe engenamthungo
Umbhobho ongenamthungo lukhetho olufanelekileyo xa ukuthembeka phantsi kweemeko ezinzima kungenakuxoxiswana ngako:
- Uxinzelelo oluphezulu lweoli kunye nokuhanjiswa kwegesi: Iindawo zemibhobho ezisebenza ngaphaya koxinzelelo oluqhelekileyo lokusasazwa, ingakumbi kwinkonzo emuncu.
- Iityhubhu zebhoyila kunye ne-heat exchanger: Amaqondo obushushu aphezulu kunye noxinzelelo zifuna ubukhulu obufanayo bodonga kwaye akukho zindawo zibuthathaka zomthungo.
- Ukulungiswa kweekhemikhali kunye nepetrochemical: Imidiya edlakazelayo kumaqondo obushushu aphezulu ifuna iimpawu zezinto ezihambelanayo.
- Izicelo zamandla enyukliyaIikhowudi zeCandelo lesi-3 le-ASME zihlala ziyalela imibhobho engenamthungo kwiinkqubo ezibalulekileyo zokhuseleko.
- Inkonzo yeenqwelo-moya kunye neenkonzo ze-cryogenic: Iingxaki zokutshintsha ubushushu obugqithisileyo kunye nokubhitya okuphantsi kobushushu zikhetha ulwakhiwo olungenamthungo.
- Iityhubhu zeHydraulic kunye nezixhobo: Imigca emincinci, enoxinzelelo oluphezulu apho ukufana kobukhulu bodonga kubaluleke kakhulu.
Kwizicelo zentsimbi engagqwaliyo, umbhobho ongenamthungo uhlala ukhethwa kwiindawo zaselwandle, ekucutshungulweni kweekhemikhali ezine-chloride eninzi, kunye nokusetyenziswa kwenyukliya apho imibhobho yentsimbi engagqwaliyo kufuneka isebenze ngaphandle komngcipheko womthungo wokuwelda.
Izicelo ezilungileyo zePipe eWelded
Umbhobho odibeneyo lukhetho olusebenzayo nolunoqoqosho kwiintlobo ezininzi zezicelo zoshishino:
- Ulwakhiwo kunye nolwakhiwo: Ukwakha iifreyimu, ukufaka iintsika, kunye neenkxaso apho umthamo wokuthwala umthwalo ungaphakathi kakuhle kwimida yepayipi edityanisiweyo.
- Iinkqubo zamanzi kunye nogutyulo: Ukusasazwa kwamanzi kamasipala, ukuthuthwa kwamanzi amdaka, kunye nokutsalwa kwamanzi amdaka kuxinzelelo oluphantsi ukuya koluphakathi.
- Uthutho lolwelo olunoxinzelelo oluphantsi ukuya koluphakathi: Izixhobo zokucoca, amanzi okupholisa, kunye nemigca yenkqubo engabalulekanga.
- Iipayipi ezinkulu ngobukhulu: Imigca yokuqokelela ioyile negesi, iipayipi zokuhambisa amanzi, kunye nemibhobho yodaka apho ububanzi bayo budlula amandla angenamthungo.
- Iinkqubo ze-HVAC: Amanzi abandayo, amanzi ashushu ashushu, kunye nemibhobho yokufunxa.
- Uyilo lwezakhiwo kunye nolwenziwe ngokubanzi: Izikhonkwane, ucingo, kunye nezixhaso zoomatshini.
Kwizinto ezisetyenziswa ngentsimbi engagqwaliyo, umbhobho odibeneyo usetyenziswa kakhulu ekulungisweni kokutya, ekusetyenzisweni kobisi, kwinkonzo yamachiza ngokubanzi, nakwiindawo ezisetyenziswa kwizakhiwo apho uxinzelelo kunye nokugqwala kuphakathi.
Imigangatho kunye neenkcukacha ekufuneka uzazi
Imigangatho yemibhobho ichaza iimfuno zokuvelisa, ukwakheka kweekhemikhali, iimpawu zoomatshini, kunye neenkqubo zovavanyo. Ukwazi ukuba loluphi uhlobo lombhobho olusebenzayo kubalulekile ukuze kuchazwe ngokufanelekileyo. Le migangatho igcinwa yimibutho efana ne- ASTM International kunye ne-American Society of Mechanical Engineers.
| umgangatho | Uhlobo lombhobho | imathiriyeli | Isicelo sokuqala | Iimfuno eziphambili |
|---|---|---|---|---|
| ASTM A106 | Ngaphandle | Insimbi yeCarbon | Inkonzo yobushushu obuphezulu | Uvavanyo oluyimfuneko lwe-hydrostatic; olungenamthungo kuphela |
| ASTM A53 | I-Welded kwaye ayinamthungo | Insimbi yeCarbon | Inkonzo ngokubanzi kunye noxinzelelo | Amanqanaba A kunye no-B; mnyama okanye i-galvanized |
| ASTM A312 | Ingenamthungo kwaye iWelded | Austenitic steel stainless | Ubushushu obuphezulu kunye nokugqwala ngokubanzi | Igubungela i-304, 304L, 316, 316L, njl. |
| ASTM A790 | Ingenamthungo kwaye iWelded | Duplex steel stainless | Inkonzo eyonakalisayo | Igubungela u-2205, 2507, njl. |
| I-API 5L | Ingenamthungo kwaye iWelded | Insimbi yeCarbon | Ukuhanjiswa kweoli kunye negesi | I-PSL1 kunye ne-PSL2; i-welded ifuna i-100% seam NDT kwi-PSL2 |
| EN 10216 | Ngaphandle | Iintsimbi ezahlukeneyo | Iinjongo zoxinzelelo | Umgangatho waseYurophu; olingana ne-ASTM A106 |
| EN 10217 | Welded | Iintsimbi ezahlukeneyo | Iinjongo zoxinzelelo | Umgangatho waseYurophu weetyhubhu zoxinzelelo ezidityanisiweyo |
| I-JIS G3454 | Ingenamthungo kwaye iWelded | Insimbi yeCarbon | Inkonzo yoxinzelelo | Umgangatho waseJapan |
| I-JIS G3459 | Ingenamthungo kwaye iWelded | Yenziwe ngentsimbi eshayinayo | Inkonzo yoxinzelelo | Umgangatho waseJapan wombhobho ongenasici |
Qaphela ukuba eminye imigangatho, efana ne-ASTM A53 kunye ne-API 5L, igubungela zombini ipayipi engenamthungo kunye ne-welded. Umgangatho uchaza iindlela ezahlukeneyo zokuvelisa, zokuvavanya, kunye nokwamkelwa kohlobo ngalunye. Soloko uqinisekisa ukuba inguqulelo engenamthungo okanye e-welded yenkcazo yemigangatho emibini iyafuneka kwisicelo sakho.
Indlela Yokukhetha: Isakhelo Sezigqibo Esisebenzayo
Uninzi lwamanqaku malunga nombhobho odibeneyo ongenayo i-seamless vs welded achaza umahluko wobugcisa ngaphandle kokukunika indlela yokwenza isigqibo. Nantsi isakhelo esisebenzayo onokusisebenzisa.
Qala ngale mibuzo mihlanu:
- Ifuna ntoni ikhowudi yakho yokuhambisa imibhobho?
Jonga i-ASME B31.3, i-API 5L, okanye iinkcukacha zobunjineli bomthengi wakho. Ukuba ikhowudi iyalela ukuba ingasebenzi kakuhle kwiklasi yakho yenkonzo, yimpendulo yakho leyo. Umzekelo, i-ASME B31.3 Category M (iityhefu fluids) kunye nezinye iinkcukacha ezininzi ze-hydrocarbon ezinoxinzelelo oluphezulu zifuna ingasebenzi kakuhle okanye zibeke imida engqongqo kwipayipi edibeneyo. - Uxinzelelo lwakho lokusebenza kunye nobushushu bunjani?
- Ngaphezulu kwe-1,000 psi (69 bar) okanye ngaphezulu kwe-750 degrees Fahrenheit (400 degrees Celsius): cinga kakhulu nge-seamless.
- Ngaphantsi kwe-300 psi (21 bar) nangaphantsi kwe-400 degrees Fahrenheit (200 degrees Celsius): umbhobho odibeneyo ngokuhlolwa ngokufanelekileyo uhlala wanele.
- Phakathi: vavanya ngokusekelwe kwizinto zokhuseleko, iziphumo zokungaphumeleli, kunye neemfuno zekhowudi.
- Yintoni le nto ibangela ukugqwala?
- Inkonzo emuncu (i-hydrogen sulfide), iindawo ezityebileyo kwi-chloride, okanye ukuvezwa okumanzi nokwomileyo: okungenamthungo okanye okudityanisiweyo nge-PWHT kunye ne-NDT epheleleyo.
- Amanzi angathathi cala, ukuvezwa emoyeni, okanye iikhemikhali ezingenobungozi: umbhobho odibeneyo wanele.
- Udinga ububanzi obungakanani?
- Ngaphezulu kwee-intshi ezingama-24 (610 mm): umbhobho odibeneyo lolona khetho lusebenzayo.
- Ngaphantsi kwe-2 intshi (50 mm): umbhobho ongenamthungo ufumaneka lula kwaye udla ngokubiza ixabiso eliphantsi.
- Phakathi: zombini ziindlela; vumela uxinzelelo kunye nokugqwala kuqhube isigqibo.
- Luthini uhlahlo-lwabiwo mali?
- Ukuba i-junk ibiza ngaphezulu ngama-40 ekhulwini kodwa ixabiso lakho lokhuseleko lifuna oko, ixabiso lifanelekile.
- Ukuba umbhobho odibeneyo one-NDT epheleleyo uhlangabezana nazo zonke iimfuno zobugcisa, imali egciniweyo ifanele ibhajethi yakho.
Umphathi wokuthenga kwisityalo se-petrochemical eZhejiang usebenzise olu luhlu lokuhlola kwiprojekthi yokwandisa yakutshanje. Inkcazo yokuqala yayifuna umbhobho ongenamthungo we-316L kuyo yonke indawo. Iqela livavanye iimeko zokusebenza ukuze ligqibe kwelokuba imigca yokutya ye-reactor kunye nemigca yomphunga enoxinzelelo oluphezulu zifuna ukwakhiwa okungenamthungo. Iqela litshintshele amanzi okupholisa kunye ne-nitrogen kunye nemigca ye-utility ukuya kumbhobho we-316L odibeneyo owahlolwa ngokupheleleyo nge-X-ray. Olu hlaziyo lusindise malunga ne-185000 kwiphakheji yepayipi eyi-2.1 yezigidi ngaphandle kokunciphisa ukuthembeka kwenkqubo.
Izinto ezifunekayo ukuze kubonelelwe, ixesha lokufumana imali, kunye nezinto ezifunekayo ukuze kufumaneke imali
Ngaphaya kokusebenza kobugcisa, izinto eziluncedo zokubonelela zichaphazela isigqibo sombhobho ongenamthungo kunye nowelding.
Amaxesha okukhokela abonisa umahluko omkhulu phakathi kwezinto ezimbini. Imveliso yepayipi engenamthungo ifuna iinkampani ukuba zifumane ii-billets, ezifuna ukwenziwa iinkqubo zokufudumeza nokubhoboza ezifuna umsebenzi omkhulu wokugqiba. Amanqanaba aqhelekileyo afuna ixesha lokukhokela leeveki ezisi-8 ukuya kwezili-16, ngelixa ii-alloys ezikhethekileyo zifuna iiveki ezingama-20 nangaphezulu ukuze zenziwe. Imveliso yepayipi edibeneyo iqala ngokusetyenziswa kwezinto ezikhoyo zekhoyili okanye zepleyiti. Ubungakanani obuqhelekileyo beemveliso bunokufumaneka kwisitokhwe, ngelixa abathengi banokulindela ukuba ii-odolo zabo zesiko zifike phakathi kweeveki ezi-4 nezisi-8 emva kokufaka isicelo sabo.
Umbhobho odibeneyo uba lolona khetho lukhethwayo kwiiprojekthi ezincinci kuba uneemfuno eziphantsi zobungakanani obuncinci bomyalelo. Iifektri zemibhobho ezingenamthungo zihlala zifuna ubuncinci beetoni ngokobukhulu nangomgangatho. Ukhetho olusebenzayo kuphela kwiprojekthi, olufuna iimitha ezingamakhulu amathathu zezinto zokufaka imibhobho, kukuthenga umbhobho odibeneyo kwimpahla yomsasazi.
Umbhobho odibeneyo unika ukufikelela okulula kubungakanani beepayipi ezenziwe ngokwezifiso. Inkqubo yokuvelisa umbhobho odibeneyo idala iimveliso ezinokwenziwa zibe ziimilinganiselo zepayipi ezingezizo ezisemgangathweni ngokulungiswa kweeroli ezithile ezixhomekeke kwiigeyiji zepleyiti ezikhethiweyo. Ukuveliswa kobukhulu beepayipi ezincinci ezingenamthungo ngokwezifiso kufuna ukuthengwa kweebhilethi kunye notshintsho lweedayi, nto leyo edala imiqobo emikhulu yezemali kumashishini.
Iindawo ezahlukeneyo kwihlabathi liphela zibonelela ngamanqanaba ahlukeneyo okufumaneka. Ummandla we-Asia Pacific ulawula uninzi lwemveliso yeepayipi ezingenamthungo, eyenzeka ikakhulu kwiindawo zokuvelisa zaseTshayina, eJapan, naseIndiya. Iipayipi ezingenamthungo ezifunyenwe kwezi ndawo ziya kubonelela ngeeprojekthi zamazwe ngamazwe ngezisombululo ezingabizi kakhulu, kodwa amashishini kufuneka aqinisekise umgangatho wemveliso kwaye afumane iziqinisekiso ezifunekayo.
I-LIANYUNGANG DAPU METAL CO. LTD inika abathengi iimveliso zemibhobho yentsimbi engenamthungo kunye neyokudityaniswa, eziquka intsimbi yekhabhoni, intsimbi engatyiwayo, kunye nezinto ze-alloy. Uluhlu lwethu luquka ubungakanani obuqhelekileyo obulungele ukuthunyelwa kwihlabathi liphela, kwaye sixhasa iinkcukacha ezenziwe ngokwezifiso kwiimfuno ezithile zeprojekthi.
Imibuzo ebuzwa qho
Yintoni umahluko phakathi kokuveliswa kwemibhobho engenamthungo kunye neyi-welded?
Ukuvelisa umbhobho ongenamthungo kuqala ngokufudumeza i-billet yentsimbi, ethi emva koko abasebenzi bayigqobhoze embindini wayo besebenzisa isixhobo sokubhoboza esijikelezayo. Ukucubungula kuqala ngabasebenzi abasika ipleyiti yentsimbi okanye umcu, abawubumba ube sisilinda, ngaphambi kokusebenzisa iindlela zokuwelda ezifana ne-ERW, i-LSAW, okanye i-SSAW ukuze badibanise imiphetho.
Ngaba iipayipi ezingenamthungo zihlala ziqinile kuneepayipi ezidityanisiweyo?
Iipayipi ezingenamthungo zinamandla amakhulu, nto leyo ebenza bakwazi ukumelana noxinzelelo olungaphezulu nge-15 ukuya kwi-20 ekhulwini kuneepayipi ezidityanisiweyo ezihambelana neemfuno zezinto zazo kunye nobukhulu bodonga. Inkqubo yepayipi edityanisiweyo ye-HFI-ERW yanamhlanje ifumana ukusebenza okuthembekileyo ngendlela yayo epheleleyo yokuhlola, evavanya zonke ii-welding seams zezicelo zoxinzelelo oluphakathi. Umahluko wamandla phakathi kwezinto ubeka ukubaluleka okukhulu kwizicelo ezihlangabezana neemeko zoxinzelelo oluphezulu kunye neendawo zobushushu obuphezulu kunye neentshukumo zomthwalo ojikelezayo.
Ngaba iteknoloji yepayipi edibeneyo iyabususa ubuthathaka bomthungo?
Itekhnoloji yanamhlanje yokuwelda kunye novavanyo oluzenzekelayo olungonakalisiyo luye lwanciphisa kakhulu umngcipheko weziphene zomthungo, kodwa aluzange luwususe umahluko obalulekileyo. Umthungo wokuwelda kunye nendawo echaphazeleka bubushushu isamele ukungaqhubeki kwesinyithi. Le ngxaki ayizisi mingeni ibalulekileyo kwiizicelo ezininzi ezisebenza kumanqanaba oxinzelelo oluphantsi ukuya koluphakathi. Inkqubo yokukhetha imibhobho ithatha imithungo njengento ebalulekileyo xa ukhetha imibhobho yezicelo zenkonzo enoxinzelelo oluphezulu kunye neyomuncu.
Kutheni umbhobho ongenamthungo ubiza kakhulu kunombhobho odibeneyo?
Iindleko eziphezulu zemveliso yombhobho ongenamthungo zibonisa ukuba udinga izixhobo ezingaphezulu zokwenza umbhobho odibeneyo kuba umbhobho ongenamthungo ufuna izixhobo ezongezelelweyo ezingama-20 ukuya kuma-50 ekhulwini. Iprimiyamu engenamthungo iyafaneleka xa isicelo sifuna ukuthembeka okuphezulu.
Ngaba imibhobho engenamthungo neyi-welded ingasetyenziswa ngokutshintshana?
Ezi zinto zimbini zisebenza njengeendlela ezitshintshiselanayo kwiinkqubo ezisisiseko zoxinzelelo oluphantsi, ezingenazo iimfuno ezibalulekileyo, kodwa azinazo iindlela ezihambelanayo ngokupheleleyo. Kwiinkonzo zoxinzelelo oluphezulu, ubushushu obuphezulu, ukubola, okanye umthwalo ojikelezayo, umbhobho ongenamthungo nowenziwe ngentsimbi uneempawu ezahlukeneyo zokusebenza. Ukugqitywa kokugqibela kufuneka kusekelwe kwikhowudi yepayipi efanelekileyo, iinkcukacha zomthengi, kunye nohlalutyo lobunjineli.
Yeyiphi engcono kwimibhobho yeoyile negesi: engenamthungo okanye edibeneyo?
Kuxhomekeke kwinkonzo. Imigca yokudlulisa uxinzelelo oluphezulu, inkonzo emuncu, kunye neenkqubo ezibalulekileyo zokhuseleko zihlala zifuna imibhobho engenamthungo. Imigca yokuqokelela enobubanzi obukhulu, imigca yokufaka amanzi, kunye nemibhobho yokusasaza enoxinzelelo oluphantsi zihlala zisebenzisa imibhobho edibeneyo. I-API 5L igubungela zombini iintlobo kwaye ichaza iimfuno ezahlukeneyo zovavanyo kuyo nganye.
Ungayibona njani ukuba umbhobho awunamthungo okanye udityanisiwe?
Eyona ndlela ilula yokufumanisa uhlobo lombhobho ifuna ukuhlolwa ngokubonakalayo. Umbhobho odibeneyo udla ngokubonisa i-weld bead ebonakala kumphezulu wangaphakathi okanye wangaphandle wombhobho ecaleni komthungo wawo omde. Imibhobho engenamthungo ibonisa umphezulu odibeneyo ongenazo naziphi na ii-weld seams ezibonakalayo. Iindlela zokuvavanya ezingonakalisiyo ezifana nokuhlolwa kwe-eddy current kufuneka ziqinisekise ubukho bemigca yomthungo ebonakala emva kokugawula i-weld bead ibe ngumphezulu olinganayo.
Zithini iingxaki zeepayipi ezidityanisiweyo?
Izinto ezingalunganga kakhulu bubuthathaka obunokubakho kumthungo we-weld, amandla oxinzelelo aphantsi xa kuthelekiswa nombhobho ongenamthungo wobukhulu obufanayo, ukuthambekela kwe-HAZ ekugqwaleni kwiindawo ezinobundlongondlongo, kunye nezinto eziphantsi zokusebenza kakuhle kwamalungu phantsi kwezinye iikhowudi zemibhobho. Izinto ezingalunganga zezi nkqubo zibangela ingxaki enkulu kwiizicelo ezininzi, kodwa itekhnoloji yanamhlanje yokuwelda kunye nezisombululo zokuhlola zisombulula le ngxaki.
Ufanele ukhethe nini umbhobho ongenamthungo endaweni yombhobho odibeneyo?
Khetha umbhobho ongenamthungo xa usetyenziso lubandakanya uxinzelelo oluphezulu (ngaphezulu kwe-1000 psi), ubushushu obuphezulu (ngaphezulu kwe-750 degrees Fahrenheit), iindawo ezirhabaxa apho i-HAZ ingenakuncitshiswa khona, ukulayisha ngokujikeleza, okanye xa ikhowudi yemibhobho efanelekileyo iyalela ukwakhiwa okungenamthungo. I-Feamless ikwafuneka xa ububanzi bombhobho buncinci kwaye i-feamless ifumaneka ngokulula ngamaxabiso akhuphisanayo.
Yeyiphi imigangatho esebenzayo kumbhobho ongenamthungo vs odibeneyo?
Imigangatho eqhelekileyo esebenza kwimibhobho engenamthungo ibandakanya i-ASTM A106, i-ASTM A312 (ekwaquka umbhobho odibeneyo), i-ASTM A335, i-EN 10216, kunye ne-JIS G3454. Imigangatho eqhelekileyo yemibhobho enemthungo iquka i-ASTM A53, i-ASTM A671, i-API 5L (ekwaquka i-mthungo), i-EN 10217, kunye ne-JIS G3457. Eminye imigangatho, efana ne-ASTM A53 kunye ne-API 5L, igubungela zombini iintlobo ngeemfuno ezahlukeneyo nganye.
isiphelo
Ingxoxo yombhobho oqinileyo ngokuchaseneyo nowelding ayinaso isisombululo esisebenza kuzo zonke iimeko. Imibhobho engenamthungo inika amandla aphezulu kunye nokumelana noxinzelelo kunye nokhuseleko oluphuculweyo lokugqwala kwizicelo ezibalulekileyo. Imibhobho edibeneyo inika iingenelo ezinkulu zeendleko kwaye ivumela ukhetho olukhulu lobukhulu, kwaye inokufumaneka ngokusetyenziswa kakhulu kwimizi-mveliso ngesantya esikhawulezayo.
Ukukhetha ngokuchanekileyo kufuna izixhobo ezihlangabezana neemfuno zakho zokusebenza kwaye zihambelana nemigangatho yakho yokufakelwa kwamanzi kwaye zihlala ngaphakathi kwemida yakho yemali. Ixabiso eliphambili lombhobho ongenamthungo libonelela ngexabiso lezicelo ezibalulekileyo zoxinzelelo oluphezulu kunye nobushushu obuphezulu. Izixhobo zokusebenza, iiprojekthi zesakhiwo, kunye neemfuno zothutho olumanzi zifuna umbhobho otshisiweyo wanamhlanje, oza nokuhlolwa ngokufanelekileyo njengesisombululo esingabizi kakhulu.
Abathathi-nxaxheba kwiprojekthi kufuneka baqhagamshelane nathi ukuze bafumane uncedo lobuchwephesha ekumiseleni ukhetho olufanelekileyo lwemibhobho kwiiprojekthi zabo. I-LIANYUNGANG DAPU METAL CO., LTD inikezela ngemibhobho yentsimbi engenamthungo nedibeneyo eyenziwe ngentsimbi yekhabhoni, intsimbi engagqwaliyo, kunye ne-alloy kunye nesiqinisekiso esipheleleyo kunye nokuhanjiswa kwehlabathi.
Cela isicatshulwa seprojekthi yakho elandelayo, okanye ujonge imibhobho yethu yentsimbi engagqwaliyo ukuze ufumane izinto ezifanelekileyo kwisicelo sakho.
