ASTM A252simbi mutopota chinhu chakajairika cylindrical pombi murwi zvinhu zvinofukidza zvose welded uye isina musono mhando dzesimbi pombi mirwi apo humburumbira simbi inoshandiswa senhengo zvachose inotakura mutoro kana segoko kugadzira cast-in-nzvimbo kongiri murwi.
Grade 3igiredhi repamusoro rekuita pakati pemagiredhi matatu eA252, ane hushomagoho simba re310MPa [45,000 psi]uye shomasimba rekusimba re455MPa [66,000 psi].Kana ichienzaniswa nemamwe mamakisi, Giredhi rechitatu rinonyanya kukodzera zvivakwa zviri pasi pemitoro inorema kana munzvimbo dzinodiwa zvakanyanya, uye inowanzoshandiswa mukuvaka hwaro hwemabhiriji makuru, zvivakwa zvepamusoro-soro, kana mapuratifomu ekumahombekombe.
A252 yakakamurwa kuita mamakisi matatu kuti ienderane nenzvimbo dzakasiyana dzekushandisa.
Grade 1,Grade 2,uyeGrade 3.
Kuwedzera zvishoma nezvishoma mumagetsi emagetsi.
Grade 1inonyanya kushandiswa mumashandisirwo apo hutano hwevhu hwakanaka uye zvinodiwa zvinotakura hazvisi kunyanya kukwirira.Mienzaniso inosanganisira zvimiro zvakareruka zvezvivakwa zvekugara kana zvekutengesa, kana mabhiriji madiki asingade mitoro yakakosha.
Grade 2inokodzera kushandiswa nemamiriro asina kunaka evhu kana kuti yakakwirira-inotakura zvinodiwa.Semuenzaniso, mabhiriji akaremerwa zvine mwero, zvivakwa zvakakura zvekutengesa, kana zvivakwa zveveruzhinji.Inogonawo kushandiswa munzvimbo dzine matafura emvura akakwirira, akadai senzizi nemadziva, uko kunoda kupikisa kwakasimba deformation.
Grade 3inoshandiswa kune zvinorema-basa zvinodiwa mumamiriro ezvinhu akanyanyisa, akadai semabhiriji makuru, nheyo dzemidziyo inorema, kana basa rakadzika nheyo dzezvivakwa zvepamusoro.Uye zvakare, kune akakosha mamiriro e geological, senge ivhu rakapfava kana risina kugadzikana, Giredhi rechitatu rinopa hukuru hwekutakura mutoro uye kugadzikana.
Yakatangwa muna 2014,Botop Steelinotungamira kabhoni simbi pombi mutengesi kuChamhembe kweChina, inozivikanwa nekugadzira yepamusoro-yemhando yakashongedzwa uye isina musono pombi dzesimbi.
Zvese zvigadzirwa zvedu zvinosangana zvakaomesesa ASTM A252 zviyero, kuve nechokwadi chekushanda kwakakwana pasi pemamiriro akanyanya.
Isu tinopawo huwandu hwakazara hwefittings uye flanges kusangana nezvinodiwa zvakasiyana-siyana zvepombi mapurojekiti.
Paunosarudza Botop Steel, unosarudza kunaka uye kuvimbika.
ASTM A252 Pipe Pile Pipe inogona kuiswa muzvikamu zviviri zvikuru zvekugadzira maitiro:isina musono uye yakasungwa.
Mune welding process, inogona kuwedzera kukamurwa kuitaERW, EFW,uyeSAW.
SAW inogona kuiswa muzvikamuLSAW(SAWL) uyeSSAW(HSAW) zvichienderana negwara reweld.
Nekuti SAW inowanzoiswa welding uchishandisa kaviri-sided submerged arc welding technique, ivo vanowanzonziDSAW.
Idzi nzira dzakasiyana dzekugadzira dzinobvumira ASTM A252 tubular murwi pombi kusangana zvakasiyana siyana zveinjiniya zvinodiwa.
Inotevera ndiyo dhizaini yekuyerera kwechati yespiral simbi pombi (SSAW):
SSAW simbi pombiyakanakira kugadzirwa kwepombi yesimbi yakakura-dhayamita uye inogona kugadzirwa mumadhayamita anosvika 3,500mm.Haisi chete inogona kugadzirwa muhurefu hwakareba, yakanakira zvimiro zvakakura, asi SSAW simbi pombi zvakare yakachipa kana ichienzaniswa neLSAW uye SMLS simbi pombi.
Botop Steel inogona kupa anotevera saizi masasi emachubhu esimbi:
Phosphorus yemukati haipfuure 0.050%.
Izvo zvemakemikari zvinodikanwa zveASTM A252 zviri nyore kana zvichienzaniswa nemamwe pombi zviyero kune mamwe maapplication nekuti kana pombi ichishandiswa semurwi wepombi, inonyanya kuumbwa mune zvakasikwa.Zvakakwana kuti pombi yesimbi inogona kumira mitoro inodiwa uye mamiriro ezvakatipoteredza.Iyi chemistry yakarerutswa inobatsira kukwirisa mutengo uye kugadzirwa uku uchisangana nezvinodiwa zvekuchengetedza zvimiro uye kusimba.
ATafura 2 inopa iyo yakaverengerwa mishoma kukosha:
Kana iyo yakatsanangurwa yezita remadziro ukobvu huri pakati kune idzo dzaratidzwa pamusoro, hudiki hwekurebesa kukosha huchatemwa sezvinotevera:
Giredhi 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: kureba mu2 mukati. [50.8 mm], %;
t: yakatsanangurwa zita remadziro ukobvu, mukati. [mm].
Kune saizi yemurwi wepombi isina kunyorwa muhuremu hwepombi chati, huremu pahurefu hweyuniti huchaverengerwa sezvizvi:
W = 10.69(D - t)t [ W = 0.0246615(D - t)t ]
W = uremu pahurefu hweyuniti, lb/ft [kg/m].
D = yakataurwa kunze kwedhayamita, mukati. [mm],
t = yakatsanangurwa zita remadziro ukobvu, mukati. [mm].
Kambani yedu inopa huwandu hwakawanda hwemachira anosanganisira Paint, varnish, galvanized, zinc-rich epoxy, 3LPE, coal tar epoxy, nezvimwewo kuzadzisa zvinodiwa nemapurojekiti akasiyana uye kuve nechokwadi chekugara kwenguva refu.
Paunenge uchitenga A252 Pipe Pile Tubing, ruzivo runotevera runofanira kupihwa kuitira kufambisa kugona kwemupi kuzadzisa zvaunoda chaizvo uye kuderedza kugadziridzwa kunotevera uye kunonoka kunokwanisa.
1 Huwandu (tsoka kana nhamba yehurefu),
2 Zita rezvinhu (simbi pombi mirwi),
3 Nzira dzekugadzira (isina musono kana welded),
4 Giredhi (1, 2, kana 3),
5 Saizi (kunze kwedhayamita uye nemazita emadziro ukobvu),
6 Hurefu (kamwe chete, kaviri zvisina tsarukano, kana yunifomu),
7 Pakupedzisira,
8 ASTM kududzira kudomwa uye gore rekubudiswa.
