I-ASTM A252umbhobho wentsimbi yinto eqhelekileyo yombhobho we-cylindrical imfumba yezinto ezigquma zombini ezidityanisiweyo kunye neentlobo ezingenamthungo kwiimfumba zemibhobho yentsimbi apho i-cylinder yentsimbi isetyenziswa njengelungu elisisigxina eliphethe umthwalo okanye njengeqokobhe ukwenza imfumba yekhonkrithi ephosiweyo.
IBanga lesi-3lelona banga lentsebenzo liphezulu phakathi kwamabanga amathathu ka-A252, nelilelona lisezantsiisivuno samandla e-310MPa [45,000 psi]kunye nobuncinciamandla okuqina ka-455MPa [66,000 psi].Xa kuthelekiswa namanye amabanga, iBanga lesi-3 lifaneleke ngakumbi kwizakhiwo eziphantsi kwemithwalo enzima okanye kwiindawo ezifuna ngamandla, kwaye lisoloko lisetyenziswa kulwakhiwo lweziseko zeebhulorho ezinkulu, izakhiwo eziphakamileyo, okanye amaqonga akude nonxweme.
I-A252 yahlulwe yangamabanga amathathu ukumelana neemeko ezahlukeneyo zokusetyenziswa.
IBanga loku-1,IBanga lesi-2, kwayeIBanga lesi-3.
Ukunyuka ngokuthe ngcembe kwiipropati zoomatshini.
IBanga loku-1isetyenziswa ikakhulu kwizicelo apho umgangatho womhlaba ulungile kwaye iimfuno zokuthwala umthwalo zingekho phezulu kakhulu.Imizekelo ibandakanya iziseko zezakhiwo ezikhaphukhaphu zezakhiwo zokuhlala okanye zorhwebo, okanye iibhulorho ezincinci ezingadingi mithwalo ebalulekileyo.
IBanga lesi-2ilungele ukufakwa kwezicelo ezineemeko ezimbi zomhlaba okanye iimfuno eziphezulu zokuthwala umthwalo.Umzekelo, iibhulorho ezilayishwe ngokuphakathi, izakhiwo ezinkulu zorhwebo, okanye iziseko zoncedo zikawonke-wonke.Inokusetyenziswa kwakhona kwiindawo ezineetafile eziphezulu zamanzi, ezifana nemilambo kunye namachibi, apho kufuneka ukuxhatshazwa okunamandla.
IBanga lesi-3isetyenziselwa iimfuno ezinzima-umsebenzi kwiimeko ezinzima, ezifana neebhulorho ezinkulu, iziseko zezixhobo ezinzima, okanye umsebenzi onzulu wesiseko kwizakhiwo eziphakamileyo.Ukongeza, kwiimeko ezikhethekileyo zejoloji, njengemihlaba ethambileyo kakhulu okanye engazinzanga, iBanga lesi-3 libonelela ngesona sikhundla siphezulu sokuthwala umthwalo kunye nokuzinza.
Yasekwa ngo-2014,Intsimbi yeBotopngumboneleli ohamba phambili wekhabhoni wentsimbi kuMntla China, owaziwa ngokuvelisa umgangatho ophezulu wemibhobho yentsimbi edityanisiweyo nengenamthungo.
Zonke iimveliso zethu zihlangabezana nemigangatho engqongqo ye-ASTM A252, iqinisekisa ukusebenza ngokufanelekileyo phantsi kweemeko ezinzima.
Sikwanikezela ngoluhlu olupheleleyo lofakelo kunye neeflange ukuhlangabezana neemfuno zeeprojekthi ezahlukeneyo zemibhobho.
Xa ukhetha iBotop Steel, ukhetha ukugqwesa kunye nokuthembeka.
Imibhobho yoMbhobho ye-ASTM A252 ingahlelwa ngokweenkqubo ezimbini eziphambili zokuvelisa:ingenamthungo kwaye idityanisiwe.
Kwinkqubo ye-welding, inokuphinda ihlulweERW, EFW, kwayeSAW.
I-SAW ingahlelwa ngokweLSAW(SAWL) kunyeSSAW(HSAW) ngokuxhomekeke kwisalathiso se-weld.
Ngenxa yokuba i-SAW ihlala idityanisiwe kusetyenziswa ubuchule bokuwelda obunamacala amabini, zikwabizwa ngokuba zii-welding.DSAW.
Ezi ndlela zahlukeneyo zokuvelisa zivumela i-ASTM A252 i-tubular piipi yombhobho ukuba ihlangabezane neentlobo ezininzi zeemfuno zobunjineli.
Oku kulandelayo yitshathi yokuhamba kwemveliso yombhobho wentsimbi ejikelezayo (SSAW):
Umbhobho wentsimbi we-SSAWilungele ukwenziwa kombhobho wentsimbi enobubanzi obukhulu kwaye inokuveliswa kububanzi obufikelela kwi-3,500mm.Ayinakwenziwa kuphela ubude obude, ilungele izakhiwo ezikhulu, kodwa umbhobho wentsimbi we-SSAW nawo unexabiso eliphantsi xa kuthelekiswa ne-LSAW kunye ne-SMLS yentsimbi yombhobho.
IBotop Steel inokubonelela ngolu hlobo lulandelayo lweetyhubhu zentsimbi:
Umxholo wePhosphorus ungagqithi kwi-0.050%.
Iimfuno zokwakheka kweekhemikhali ze-ASTM A252 zilula xa kuthelekiswa neminye imigangatho yemibhobho yezinye izicelo kuba xa umbhobho usetyenziswa njengemfumba yombhobho, ngokuyintloko ibunjwe ngokwendalo.Kwanele ukuba umbhobho wensimbi unokumelana nemithwalo efunekayo kunye neemeko zokusingqongileyo.Le chemistry eyenziwe lula inceda ukwandisa iindleko kunye nemveliso ngelixa ihlangabezana neemfuno ezisisiseko zokhuseleko lwesakhiwo kunye nokuqina.
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].
Kubungakanani bengqumba yombhobho engadweliswanga kwitshati yobunzima bombhobho, ubunzima ngeyunithi yobude buya kubalwa ngolu hlobo lulandelayo:
W = 10.69(D - t)t [ W = 0.0246615(D - t)t]
W = ubunzima ngeyunithi yobude, lb/ft [kg/m].
D = icaciswe ngaphandle kwedayamitha, ngo. [mm],
t = ubukhulu bodonga obuchaziweyo obuchaziweyo, ngaphakathi [mm].
Inkampani yethu inikezela ngoluhlu olubanzi lweengubo ezibandakanya iPaint, ivanishi, igalvanized, i-zinc-rich epoxy, i-3LPE, i-coal tar epoxy, njl.njl. ukuhlangabezana neemfuno zeeprojekthi ezahlukeneyo kunye nokuqinisekisa ukuhlala ixesha elide.
Xa uthenga i-A252 Pipe Pile Tubing, le ngcaciso ilandelayo kufuneka inikezelwe ukuququzelela amandla omthengisi ukuhlangabezana ngokuchanekileyo neemfuno zakho ezithile kunye nokunciphisa ukuguqulwa okulandelayo kunye nokulibaziseka okunokwenzeka.
1 Ubungakanani (iinyawo okanye inani lobude),
2 Igama lemathiriyeli (iimfumba zemibhobho yentsimbi),
Iindlela ezi-3 zokwenza (ezingenamthungo okanye ezidityanisiweyo),
IBanga lesi-4 (1, 2, okanye 3),
5 Ubungakanani (ubukhulu obungaphandle kunye nobukhulu bodonga oluqhelekileyo),
Ubude obu-6 (olunye olungakhethiyo, oluphindwe kabini olungakhethiyo, okanye olufanayo),
7 Ukugqiba,
8 Ukutyunjwa kwe-ASTM kunye nonyaka wokukhutshwa.
