ASTM A252Pombi yesimbi chinhu chakajairika chepombi yesimbi inofukidza mhando dzakasungirirwa uye dzisina musono dzemapaipi esimbi uko sirinda yesimbi inoshandiswa sechinhu chinotakurwa mutoro chinogara chiripo kana segoko rekugadzira murwi wekongiri wakaumbwa panzvimbo.
Giredhi 3ndiyo giredhi repamusoro-soro rekushanda pakati pemagiredhi matatu eA252, neashomasimba rekupa simba re310MPa [45,000 psi]uye zvishomasimba rekudhonza re455MPa [66,000 psi]Zvichienzaniswa nemamwe magiredhi, Giredhi rechitatu rakakodzera zvivakwa zvinorema kana munzvimbo dzinoda simba rakawanda, uye rinowanzoshandiswa mukuvaka nheyo dzemabhiriji makuru, zvivakwa zvirefu, kana mapuratifomu ekunze.
A252 yakakamurwa kuita magiredhi matatu kuti ikwanise kushandiswa munzvimbo dzakasiyana.
Giredhi 1,Giredhi 2uyeGiredhi 3.
Kuwedzera zvishoma nezvishoma kwehunhu hwemakanika.
Giredhi 1inonyanya kushandiswa mukushandiswa uko kunaka kwevhu kwakanaka uye zvinodiwa zvekutakura mutoro zvisiri zvakanyanya. Mienzaniso inosanganisira nheyo dzakareruka dzezvivakwa zvekugara kana zvemabhizinesi, kana mabhiriji madiki asingade mitoro yakakura.
Giredhi 2yakakodzera kushandiswa muvhu risina kunaka kana kuti rinorema zvakanyanya. Semuenzaniso, mabhiriji ane zvinhu zviri pakati nepakati, zvivakwa zvikuru zvemabhizinesi, kana zvivakwa zveveruzhinji. Inogona zvakare kushandiswa munzvimbo dzine mvura yakawanda, dzakadai senzizi nemadziva, uko kunodiwa kudzivirira kusvibiswa kwakasimba.
Giredhi 3inoshandiswa pamabasa anorema mumamiriro ezvinhu akaomarara, akadai semabhiriji makuru, nheyo dzemidziyo inorema, kana basa renheyo dzakadzika dzezvivakwa zvirefu. Pamusoro pezvo, kune mamiriro enzvimbo akakosha, akadai sevhu rakapfava kana risina kugadzikana, Giredhi rechitatu rinopa kugona kwakanyanya kutakura mutoro uye kugadzikana.
Yakavambwa muna 2014,Simbi yeBotopikambani inotungamira mukutengesa mapaipi esimbi yekabhoni kuchamhembe kweChina, inozivikanwa nekugadzira mapaipi esimbi akasungirirwa emhando yepamusoro uye asina musono.
Zvigadzirwa zvedu zvese zvinosangana nezvinodiwa zvakasimba zveASTM A252, zvichivimbisa kushanda zvakanaka mumamiriro ezvinhu akaoma.
Tinopawo mhando dzakasiyana dzezvishandiso nemaflanges kuti zvizadzise zvinodiwa nemapurojekiti akasiyana-siyana emapaipi.
Paunosarudza Botop Steel, unosarudza kugona uye kuvimbika.
Mapaipi eASTM A252 Pipe Pipe anogona kuiswa muzvikamu zviviri zvikuru zvekugadzira:isina musono uye yakasungirirwa.
Mukuita kwekubatanidza, inogona kupatsanurwa zvakare kuitaERW, EFWuyeSAW.
SAW inogona kupatsanurwa muzvikamu zviviri:LSAW(SAWL) uyeSSAW(HSAW) zvichienderana nekwakatangira weld.
Nekuti SAW inowanzo sungirirwa uchishandisa nzira yekushongedza arc ine mativi maviri, inowanzo nziwoDSAW.
Nzira dzakasiyana-siyana dzekugadzira idzi dzinobvumira ASTM A252 tubular pile pombi kusangana nezvinodiwa zvakasiyana-siyana zveinjiniya.
Inotevera ndiyo chati yekuyerera kwekugadzirwa kwepombi yesimbi inotenderera (SSAW):
Pombi yesimbi yeSSAWYakanakira kugadzirwa kwepombi dzesimbi dzine dhayamita hombe uye inogona kugadzirwa nedhayamita inosvika 3,500mm. Haingogone kugadzirwa nehurefu hwakareba chete, yakanakira zvivakwa zvikuru, asi pombi dzesimbi dzeSSAW dzakachipawo kana tichienzanisa nepombi dzesimbi dzeLSAW neSMLS.
Botop Steel inogona kupa saizi dzinotevera dzemachubhu esimbi:
Huwandu hwephosphorus hahufaniri kudarika 0.050%.
Zvinodiwa pakuumbwa kwemakemikari eASTM A252 zviri nyore kana tichienzanisa nedzimwe nzira dzemapaipi dzekushandisa zvimwe nekuti kana pombi ichishandiswa semurwi wepombi, inonyanya kuva nechimiro chayo. Zvakakwana kuti pombi yesimbi ikwanise kutsungirira mitoro inodiwa nemamiriro ekunze. Kemikari iyi iri nyore inobatsira kuwedzera mutengo nekubudirira uku ichizadzisa zvinodiwa zvekuchengetedza uye kugara kwenguva refu kwechivako.
ATafura 2 inopa kukosha kwakaderera kwakaverengerwa:
Kana ukobvu hwemadziro hwakatarwa huri pakati nepakati pehunoratidzwa pamusoro apa, kukosha kwehurefu hushoma hunofanira kutsanangurwa seizvi:
Giredhi 3: E = 32t + 10.00 [E = 1.25t + 10.00]
E: kureba mu 2 in. [50.8 mm], %;
t: ukobvu hwemadziro hwakatarwa, mu. [mm].
Pahukuru hwemapaipi asina kunyorwa pachati yehuremu hwemapaipi, huremu pahurefu hweyuniti hunofanira kuverengerwa seizvi:
W = 10.69(D - t)t [W = 0.0246615(D - t)t ]
W = huremu pahurefu hweyuniti, lb/ft [kg/m].
D = dhayamita yekunze yakatarwa, mu. [mm],
t = ukobvu hwemadziro hwakatarwa, mu. [mm].
Kambani yedu inopa mhando dzakasiyana dzemachira anosanganisira Pendi, varnish, galvanized, zinc-rich epoxy, 3LPE, coal tar epoxy, nezvimwewo kuti zvizadzise zvinodiwa nemapurojekiti akasiyana-siyana uye kuve nechokwadi chekuti inogara kwenguva refu.
Pakutenga A252 Pipe Pile Tubing, ruzivo runotevera runofanira kupihwa kuti rubatsire mutengesi kukwanisa kuzadzisa zvaunoda nemazvo uye kuderedza shanduko dzinotevera uye kunonoka kunogona kuitika.
1 Huwandu (tsoka kana huwandu hwehurefu),
2 Zita rezvinhu (mapaipi esimbi),
3 Nzira dzekugadzira (dzakasungirirwa kana dzakasungirirwa),
Giredhi rechina (1, 2, kana 3),
Saizi 5 (dhayamita yekunze uye ukobvu hwemadziro),
6 Hurefu (husina kurongeka, huviri husina kurongeka, kana yunifomu),
7 Kupedzisa kuguma,
8 Kutsanangurwa kweASTM uye gore rekuburitswa.
