Yambitsani:
Chitoliro cholumikizidwa ndi spiral ndi gawo lofunikira kwambiri pamapulojekiti osiyanasiyana a zomangamanga, kuphatikiza mapaipi amafuta ndi gasi, njira zoperekera madzi, ndi ntchito za kapangidwe kake. Monga momwe zilili ndi chinthu chilichonse chopangidwa ndi injini, zofunikira zina ziyenera kutsatiridwa kuti zitsimikizire kuti mapaipi awa amagwira ntchito bwino komanso kudalirika. Mu blog iyi, tifufuza zovuta zazozungulira welded chitoliro specificationskuti tipereke chitsogozo chokwanira kuti timvetse bwino chinthu chofunikachi cha mafakitale.
1. Tanthauzo ndi ubwino:
Njira yopangira yachitoliro chozungulira cholumikizidwaNdi kulumikiza chingwe chachitsulo chotenthedwa kukhala mawonekedwe ozungulira popanga mawonekedwe ozungulira mosalekeza. Mphepete mwa mzerewu zimalumikizidwa pamodzi pogwiritsa ntchito welding ya arc yozama mbali ziwiri (DSAW) kuti apange chitoliro champhamvu kwambiri chokhala ndi kulimba komanso kukana kusintha. Ubwino waukulu wa chitoliro chozungulira ndi monga kulimba kwabwino kwa kapangidwe kake, mphamvu yofanana kutalika kwa chitolirocho, komanso kuthekera kopirira kupsinjika kwakukulu kwamkati.
2. M'mimba mwake ndi makulidwe a khoma:
Mafotokozedwe a mapaipi olumikizidwa ndi spiral akuphatikizapo magawo osiyanasiyana, omwe ndi ofunika kwambiri ndi kukula kwa m'mimba mwake ndi khoma la chitolirocho. Miyeso iyi imadalira momwe ntchito ikufunira komanso momwe ikufunira. Kawirikawiri, chitoliro cholumikizidwa ndi spiral chimapezeka m'mimba mwake waukulu kuposa chitoliro cholumikizidwa ndi spiral seam, chomwe nthawi zambiri chimakhala mainchesi 8 mpaka mainchesi 126 (203.2 mpaka 3200 mm) kapena kuposerapo. Kukhuthala kwa khoma kumayambira 6 mm mpaka 25.4 mm kapena kuposerapo.
3. Chitsulo cha mtundu ndi kapangidwe ka mankhwala:
Kusankha mtundu wa chitsulo ndi kapangidwe ka mankhwala kumachita gawo lofunika kwambiri pakuzindikira mawonekedwe a makina ndi kukana dzimbiri kwa mapaipi olumikizidwa ndi spiral. Mitundu yachitsulo yomwe imagwiritsidwa ntchito kwambiri pa mapaipi ozungulira ndi monga API 5L X series, ASTM A252 grade 2 ndi 3, ndi ASTM A139 grade B ndi C. Mitundu yachitsulo iyi imatsimikiziridwa kutengera mphamvu ya zokolola ndi carbon equivalent kuti zitsimikizire magwiridwe antchito abwino kwambiri pa ntchito zinazake.
4. Kuyesa ndi kuwunika:
Pofuna kutsimikizira ubwino ndi kudalirika kwa mapaipi olumikizidwa ndi spiral, opanga amatsatira njira zoyesera ndi kuwunika mozama. Mayeso ofunikira omwe amachitidwa ndi monga kuyesa kwa hydrostatic, kuyesa kosawononga (monga ultrasound kapena radiographic inspection) ndi kuyesa kwa makina (kuyesa kukoka, kukwera ndi kukhudza). Mayeso awa amatsimikizira kuti mapaipi akukwaniritsa miyezo ya mphamvu, kukula ndi kutayikira kofunikira.
5. Chophimba ndi chitetezo pamwamba:
Kuti muteteze mapaipi olumikizidwa ndi spiral ku dzimbiri ndi zinthu zina zakunja, pali njira zosiyanasiyana zophikira pamwamba. Zophikira izi zitha kuphatikizapo epoxy, coal tar enamel kapena polyethylene, pakati pa zina. Kuphatikiza apo, njira zotetezera cathodic monga sacrificial anodes kapena impressed current systems zingagwiritsidwe ntchito kuteteza mapaipi.
Pomaliza:
Kumvetsetsa zofunikira za chitoliro cholumikizidwa ndi spiral ndikofunikira kwambiri kwa mainjiniya, oyang'anira mapulojekiti ndi omwe akukhudzidwa ndi ntchito zomangamanga. Poganizira kukula kwake, makulidwe a khoma, mulingo wachitsulo, mayeso ndi chitetezo cha pamwamba, mutha kuwonetsetsa kuti chitolirocho chikukwaniritsa miyezo yofunikira yogwirira ntchito. Kutsatira malamulo moyenera sikuti kumangotsimikizira kuti makina anu opangira mapaipi ndi otetezeka, komanso kumatsimikizira kuti madzi, mpweya ndi zinthu zina zimayendetsedwa bwino. Kudzera mu chisamaliro chatsatanetsatane, mainjiniya ndi omwe akukhudzidwa amatha kupeza zotsatira zabwino za polojekitiyi pamene akukwaniritsa miyezo ndi malamulo ofunikira amakampani.
Nthawi yotumizira: Disembala-11-2023