I-ASTM A252 iBanga lesi-3yeyona nto ixhaphakileyo isetyenziswa njengombhobho wengqumba yecylindrical.
Iimfumba zemibhobho yensimbi yeBanga lesi-3 azikhawulelwanga kwinkqubo ethile yokuvelisa kwaye inokuveliswa ngokusebenzisa iindlela ezahlukeneyo zokwenza umbhobho, kubandakanywa.I-SMLS(ngaphandle komthungo),SAW(i-arc entywiliselweyo edityanisiweyo), kunyeEFW(i-electro-fusion welded).Oku kuguquguquka kuvumela ukuba kulungiswe kwiimfuno ezahlukeneyo zobunjineli kunye neemeko zesicelo.
Njengelona bakala liphezulu kumgangatho we-A52, ineepropati ezigqwesileyo zoomatshini ezinobuncinane bamandla obuvuno obuyi-310 MPa kunye namandla asezantsi e-455 MPa kwaye inokusetyenziswa njengenxalenye yesakhiwo esithwele umthwalo osisigxina okanye njengeqokobhe lokuphoswa. -beka iimfumba zekhonkrithi.
II-ASTM A252umgangatho ubeka ngokweendidi iimfumba zemibhobho yentsimbi zibe ngamabakala amathathu ukuze zihambelane neemeko ezahlukeneyo zesicelo kunye neemfuno zokulayisha.Amabanga mathathu ngala:
IBanga loku-1, iBanga lesi-2, neBanga lesi-3.
Le nkampani iye yazisa iseti epheleleyo yezixhobo zokuvelisa umbhobho wentsimbi ye-JCOE LSAW kunye nezixhobo zokuvavanya, ezikhethekileyo kwimveliso yentsimbi eshinyeneyo, enobubanzi obukhulu bentsimbi ye-LSAW kunye ne-DSAW (ukuwelda kwe-arc enamacala amabini).
Inkcazo yemveliso yile:
Ububanzi bangaphandle: DN 350 - 1500;
Ukutyeba kweendonga: 8 - 80 mm;
Iimfumba zemibhobho ziya kuba nesiphelo esicacileyo.
Iziphelo ziyakunqunyulwa umlilo okanye umatshini wokusikwa kwaye ucinywe.
Kwindaba yeiziphelo ezibeveled, i-engile yesiphelo se-beveled kufuneka ibe30 - 35 °.
Intsimbi yeBotopinikeza uluhlu olubanzi lwemibhobho yentsimbi ye-ASTM A52 ephezulu.Nceda uzive ukhululekile ukuqhagamshelana nathi ngeemfuno zakho.
Intsimbi iya kwenziwa yinye okanye ngaphezulu kwezi nkqubo zilandelayo: i-open-hearth, i-basic-oxygen, okanye i-furnace yombane.
A252 iya kwenziwa yiengenamthungo, ukumelana nombane welded, flash welding, okanyefusion weldedinkqubo.
Imithungo yeemfumba zemibhobho edityanisiweyo iya kubaubude, i-helical-butt, okanyei-helical-lap.
Ukuqinisekisa umgangatho kunye nokusebenza kweemfumba zepayipi zensimbi, kubalulekile ukukhetha inkqubo yokuvelisa echanekileyo.
Inkqubo ye-LSAW (SAWL) ifanelekile kumbhobho wentsimbi obubanzi obukhulu, obunzima, ngakumbi kulwakhiwo kunye neeprojekthi zeziseko ezingundoqo ezifuna umthamo ophezulu wokuthwala umthwalo kunye nokwakhiwa kwesiseko esinzulu.Ngenxa yamandla ayo aphezulu, amandla okuthwala umthwalo, kunye nokulungelelaniswa kobunzulu, iyakwazi ukulungelelanisa uluhlu olubanzi lweemeko ze-geologic ezinzima ngelixa libonelela ngeenzuzo zokufakela ngokukhawuleza kunye nokuqina kwexesha elide.
JCOEyinkqubo yokwenziwa eqhelekileyo ekuveliseni umbhobho wentsimbi LSAW, nto leyo ineenzuzo ukusebenza kakuhle kakhulu, umgangatho ophezulu, ubukhulu ubukhulu umthamo umthamo imveliso, ukuchaneka dimensional, ukuguquguquka, kunye noqoqosho, nto leyo eyenze ukuba ibe yinkqubo ekhethwayo yokwenza umbhobho ezininzi ezinkulu- iiprojekthi zobunjineli.
Intsimbi iya kuqulathaakukho ngaphezu kwe-0.050 % phosphorus.
Ukunciphisa umxholo we-phosphorus kwintsimbi kukuqinisekisa ukuba intsimbi ineempawu ezintle zomatshini, ngakumbi xa isetyenziselwa ukusetyenziswa kwezakhiwo ezifana nokufaka i-piling yesakhiwo.
Lo mda unceda ukukhusela intsimbi ukuba ingabi brittle kakhulu kumaqondo obushushu aphantsi, ngaloo ndlela iqinisekisa ukhuseleko nokuthembeka kwayo ekusebenziseni.
Kweminye imixholo yesiqalelo, akukho mfuneko.
Oku kungenxa yokuba ugxininiso oluphambili lweetyhubhu zeengqumba zemibhobho kukuqinisekisa ukuba iityhubhu zinamandla okwaneleyo okwakhiwa kunye nokuqina, okuyimpahla ebalulekileyo yokusetyenziswa kwizakhiwo ezixhasayo.
Kwimibhobho ye-tubular pile, ingqwalasela engakumbi ihlawulwe kwiipropathi zemishini yeetyhubhu, njengamandla esivuno, amandla okuqina, kunye nokuqina, njengoko ezi zakhiwo zihambelana ngokuthe ngqo nomthamo wokuthwala kunye nokuzinza kwesakhiwo kwiimfumba ze-tubular kwizicelo eziphathekayo. .
AItheyibhile 2 inika amaxabiso aphantsi abaliweyo:
Apho ubukhulu bodonga obuxeliweyo buphakathi kwezo ziboniswe ngasentla, elona xabiso lincinane lobude liya kumiselwa ngolu hlobo lulandelayo:
IBakala 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: ulwandiso kwi-2 ngaphakathi [50.8 mm], %;
t: ubungqingqwa bodonga obuxeliweyo, ngaphakathi. [mm].
Umgangatho we-ASTM A252 weBanga lesi-3 uqinisekisa ukhuseleko kunye nokuthembeka kweemfumba ze-tubular ezisetyenziswayo ngokubeka iimfuno ezincinci kwezi zakhiwo zomatshini.
Ubungakanani bombhobho obungadweliswanga kwiitafile zobunzima bombhobho, ubunzima ngeyunithi yobude bunokubalwa ngokusebenzisa ifomula.
w = C×(Dt)×t
w: ubunzima ngeyunithi ubude, Ilb/ft [kg/m];
D: icaciswe ngaphandle kwedayamitha, ngaphakathi. [mm];
t: ubungqingqwa bodonga obuxeliweyo, ngaphakathi. [mm];
C: 0.0246615 ukubala kwiiyunithi ze-SI kunye ne-10.69 yokubala kwiiyunithi ze-USC.
Ezi zibalo zingentla zisekelwe kwingcinga yokuba ubuninzi bombhobho wentsimbi yi-7.85 kg/dm³.
I-ASTM A252 yeBanga lesi-3 inamandla aphezulu kunye nokuqina kweentlobo ngeentlobo zemihlaba kunye neemfuno zokuthwala umthwalo.Lo mbhobho wentsimbi udla ngokusetyenziswa kwezi zicelo zilandelayo:
1. Iziseko zokwakha: I-ASTM A252 yeBanga lesi-3 lombhobho wensimbi isetyenziswe njengesiseko semfumba kumsebenzi wesiseko kwizakhiwo eziphakamileyo, iibhuloho, kunye nezinye izakhiwo ezinkulu ukubonelela ngenkxaso efanelekileyo kunye nokuzinza.
2. Amazibuko namazibuko: Le mibhobho yentsimbi isetyenziselwa ukugoba ekwakhiweni kwamazibuko kunye namachweba ukuqinisekisa ukuba isakhiwo siyakwazi ukumelana neempembelelo zeenqanawa kunye nokukhukuliseka kwendalo yaselwandle.Ukuze kwandiswe ukuqina kunye nokuchasana nokubola kwemibhobho yensimbi, iingubo zihlala zisetyenziselwa ukubonelela ngokhuseleko olongezelelweyo.
3. Imisebenzi yamanzi: I-ASTM A252 yeBanga lesi-3 lombhobho wentsimbi isetyenziselwa ukuqinisa iindonga zemilambo kunye nokubonelela ngokhuseleko lwezandyondyo ekwakhiweni kwamadama, izitshixo kunye nezinye izixhobo zamanzi.
4. Iiprojekthi zamandla: Kumandla omoya, i-oil rigs, kunye nezinye iiprojekthi zeziseko zombane, le mibhobho yentsimbi isetyenziswa njengezakhiwo zenkxaso ukuqinisekisa ukusebenza okuzinzileyo kwezixhobo.
5. Amaziko othutho: I-ASTM A252 yeBanga lesi-3 lombhobho wentsimbi isetyenziselwa ukufumba ekwakhiweni kweendlela zikaloliwe, uhola wendlela, kunye neenqwelomoya zeenqwelomoya ukubonelela ngomthamo owaneleyo wokuthwala umthwalo kunye nokuqina.
Ukususela ekusekweni kwayo ngo-2014,Intsimbi yeBotopuye waba ngumthengisi ohamba phambili we-carbon steel pipe eMntla China, owaziwa ngenkonzo ebalaseleyo, iimveliso ezikumgangatho ophezulu, kunye nezisombululo ezibanzi.
Intsimbi yeBotopinikezela ngeendidi zemibhobho ye-carbon steel kunye neemveliso ezinxulumene nazo, kubandakanywa i-seamless, i-ERW, i-LSAW, kunye ne-SSAW ipayipi yensimbi, kunye nomgca opheleleyo wokufakelwa kombhobho kunye neeflanges.Iimveliso zayo ezikhethekileyo zikwabandakanya i-alloys ephezulu kunye ne-austenitic stainless steels, elungiselelwe ukuhlangabezana neemfuno zeeprojekthi ezahlukeneyo zepayipi.
I-ASTM A252 GR.2 GR.3 iMibhobho yeNsimbi engenamthungo
I-ASTM A252 GR.3 i-SSAW yeMbhobho yeNtsimbi yeMbhobho
AS 1579 SSAW uMbhobho weNtsimbi waManzi kunye neNgqumba yeNsimbi
EN10219 S355J0H LSAW(JCOE) imfumba yeMbhobho yentsimbi
EN 10219 S275J0H/S275J2H ERW Umbhobho wentsimbi wesakhiwo
BS EN10210 S355J0H Carbon Umbhobho wentsimbi engenamthungo
EN10210 S355J2H ISAKHIWO ERW UMbhobho wentsimbi
API 5L PSL1&PSL2 GR.B Longitudinal Submerged-Arc Welded Pipe
I-ASTM A501 yeBanga B LSAW i-Carbon Steel Structural Tubing
ASTM A672 B60/B70/C60/C65/C70 LSAW LSAW Umbhobho wentsimbi yeCarbon
I-ASTM A671/A671M LSAW ipayipi yentsimbi
I-ASTM A500 yeBanga C engenamthungo yeSteel Structural Tube
