I-ASTM A252ipayipi lensimbi liyinto evamile yenqwaba yamapayipi ayi-cylindrical ehlanganisa kokubili izinhlobo ezishiselwe nezingenamthungo zezinqwaba zamapayipi ensimbi lapho isilinda sensimbi sisetshenziswa njengelungu eliphethe umthwalo unomphela noma njengegobolondo ukwenza inqwaba kakhonkolo.
Ibanga lesi-3yizinga eliphezulu lokusebenza phakathi kwamabanga amathathu we-A252, elinenani eliphansikhiqiza amandla we-310MPa [45,000 psi]kanye nobuncaneamandla aqinile we-455MPa [66,000 psi].Uma kuqhathaniswa namanye amabanga, iBanga lesi-3 lifaneleka kakhulu izakhiwo ezithwele kanzima noma ezindaweni ezinzima kakhulu, futhi livame ukusetshenziswa ekwakhiweni kwezisekelo zamabhuloho amakhulu, amabhilidi aphakeme kakhulu, noma amapulatifomu angaphesheya kolwandle.
I-A252 ihlukaniswe ngamabanga amathathu ukuze ibhekane nezindawo ezihlukene zokusebenzisa.
Ibanga loku-1,Ibanga lesi-2, futhiIbanga lesi-3.
Ukwanda kancane kancane kwezakhiwo zemishini.
Ibanga loku-1isetshenziswa kakhulu ezindaweni lapho izinga lomhlabathi lilihle futhi izidingo zokuthwala imithwalo zingekho phezulu kakhulu.Izibonelo zifaka isisekelo sesakhiwo esingasindi sezakhiwo zokuhlala noma ezohwebo, noma amabhuloho amancane angadingi imithwalo ebalulekile.
Ibanga lesi-2ilungele ukusetshenziswa okunezimo zenhlabathi ezingezinhle noma izidingo eziphezulu zokuthwala umthwalo.Isibonelo, amabhuloho alayishwe ngokulingene, izakhiwo ezinkulu zezentengiselwano, noma ingqalasizinda yezindawo zomphakathi.Ingasetshenziswa nasezindaweni ezinamatafula aphezulu amanzi, njengemifula namachibi, lapho kudingeka ukumelana nokuguqulwa okuqinile.
Ibanga lesi-3isetshenziselwa izidingo ezisindayo ezimweni ezimbi kakhulu, njengamabhuloho amakhulu, izisekelo zemishini esindayo, noma umsebenzi wesisekelo ojulile wezakhiwo eziphakeme.Ukwengeza, ezimweni ezikhethekile zejoloji, njengenhlabathi ethambile kakhulu noma engazinzile, iBanga lesi-3 linikeza umthamo ophakeme kakhulu wokuthwala umthwalo nokuzinza.
Isungulwe ngo-2014,Insimbi ye-Botopungumphakeli ohamba phambili wepayipi lensimbi eNyakatho neChina, owaziwa ngokukhiqiza amapayipi ensimbi ashiselwe futhi angenamthungo.
Yonke imikhiqizo yethu ihlangabezana nezindinganiso eziqinile ze-ASTM A252, iqinisekisa ukusebenza kahle ngaphansi kwezimo ezimbi kakhulu.
Siphinde sinikeze uhla olugcwele lokufakwa kanye nama-flange ukuze kuhlangatshezwane nezidingo zamaphrojekthi ahlukahlukene wamapayipi.
Uma ukhetha i-Botop Steel, ukhetha ubuhle nokuthembeka.
I-ASTM A252 Pipe Pile Pipes ingahlukaniswa ngezinqubo ezimbili eziyinhloko zokukhiqiza:engenamthungo futhi eshiselwe.
Enqubweni yokushisela, ingahlukaniswa futhi ibeERW, EFW, futhiSAW.
I-SAW ingahlukaniswa ngokuthiI-LSAW(SAWL) kanyeI-SSAW(HSAW) ngokuya ngesiqondiso se-weld.
Ngenxa yokuthi i-SAW ivamise ukushiselwa kusetshenziswa indlela yokushisela i-arc enezinhlangothi ezimbili, ibuye ibizwe ngokuthi.I-DSAW.
Lezi zindlela zokukhiqiza ezahlukahlukene zivumela ipayipi lenqwaba yeshubhu ye-ASTM A252 ukuthi ihlangabezane nezinhlobonhlobo zezidingo zobunjiniyela.
Okulandelayo ishadi lokugeleza kokukhiqiza kwepayipi lensimbi elivunguzayo (SSAW):
Ipayipi lensimbi le-SSAWilungele ukwakhiwa kwepayipi lensimbi elinobubanzi obukhulu futhi lingakhiqizwa ngobubanzi obufika ku-3,500mm.Akukona nje kuphela ukuthi ingakhiqizwa ngobude obude kakhulu, ilungele izakhiwo ezinkulu, kodwa ipayipi lensimbi le-SSAW nalo lishibhile uma liqhathaniswa ne-LSAW kanye nepayipi lensimbi le-SMLS.
I-Botop Steel inganikela ngezigaba zosayizi ezilandelayo zamashubhu ensimbi:
Okuqukethwe kwe-phosphorus akufanele kudlule u-0.050%.
Izidingo zokwakheka kwamakhemikhali ze-ASTM A252 zilula uma kuqhathaniswa nezinye izindinganiso zamapayipi kwezinye izinhlelo zokusebenza ngoba uma ipayipi lisetshenziswa njengenqwaba yamapayipi, ngokuyinhloko linesakhiwo ngokwemvelo.Kwanele ukuthi ipayipi yensimbi ingakwazi ukumelana nemithwalo edingekayo kanye nezimo zemvelo.Le chemistry eyenziwe lula isiza ukuthuthukisa izindleko nokukhiqiza ngenkathi ihlangabezana nezidingo eziyisisekelo zokuphepha nokuqina kwesakhiwo.
AIthebula 2 linikeza amanani aphansi ebaliwe:
Lapho ukujiya kodonga olushiwo kumaphakathi kulawo aboniswe ngenhla, ubuncane bevelu yobude buzonqunywa ngale ndlela elandelayo:
Ibanga lesi-3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: ubude ngama-intshi angu-2 [50.8 mm], %;
t: ukujiya kodonga olucacisiwe, ngaphakathi. [mm].
Ngosayizi wenqwaba yamapayipi abangabaliwe eshadini lesisindo sepayipi, isisindo ngobude beyunithi ngayinye kufanele sibalwe ngale ndlela elandelayo:
W = 10.69(D - t)t [ W = 0.0246615(D - t)t ]
W = isisindo ngobude beyunithi ngayinye, lb/ft [kg/m].
D = kucaciswe ububanzi obungaphandle, in. [mm],
t = ukujiya kodonga olucacisiwe, ngo. [mm].
Inkampani yethu ihlinzeka ngezinhlobonhlobo zezingubo ezihlanganisa upende, ukuvanisha, uthayela, i-epoxy ecebile nge-zinc, i-3LPE, i-coal tar epoxy, njll. ukuze kuhlangatshezwane nezidingo zamaphrojekthi ahlukahlukene nokuqinisekisa ukuqina kwesikhathi eside.
Lapho uthenga i-A252 Pile Pile Tubing, ulwazi olulandelayo kufanele luhlinzekwe ukuze kuqondiswe ikhono lomphakeli lokuhlangabezana ngokunembile nezidingo zakho ezithile futhi kuncishiswe ukulungiswa okulandelayo nokubambezeleka okungaba khona.
1 Ubuningi (izinyawo noma inombolo yobude),
2 Igama lezinto (izinqwaba zamapayipi ensimbi),
3 Izindlela zokukhiqiza (ezingenamthungo noma ezishiselwe),
IBanga lesi-4 (1, 2, noma 3),
Usayizi we-5 (ububanzi obungaphandle kanye nobukhulu bodonga olujwayelekile),
6 Ubude (okukodwa okungahleliwe, okungahleliwe okuphindwe kabili, noma umfaniswano),
7 Ekugcineni,
8 Incazelo ye-ASTM kanye nonyaka wokukhishwa.
