Amathangi Angaphakathi Angaphezulu Anyakazayo we-API 620: Ubunjiniyela bokugcina uketshezi oluvuvukayo
Kwadalwa ngo 2025.08.15
Amathangi Angaphakathi Ophahleni Oluyintantayo e-API 620: Ubunjiniyela bokugcina uketshezi oluvuvukayo
Ukuze kugcinwe izinto eziyiketshezi ezishisa kalula—njengama-hydrocarbon anomfutho ophezulu wokuba yisikhwehlezi noma imikhiqizo ebandisiwe—amathangi ajwayelekile angakwazi ukubekezelela ingcindezi avame ukunganele. I-API 620 yikhodi ejwayelekile embonini yokuklama nokwakha amathangi amakhulu, ahlanganisiwe, agcina izinto ezingaphansi kwengcindezi. Lapho ifakwe i-Internal Floating Roof (IFR), la mathangi ahlinzeka ngamasu aphindwe kabili ukuze kuvikeleke futhi kulawulwe ukukhishwa: i-API 620 shell ilawula ingcindezi yangaphakathi, kanti uphahla oluhlale luyintando lunciphisa isikhala somoya kanye nokukhishwa kwe-Volatile Organic Compound (VOC).
1. Ukuchaza i-API 620: Izindinganiso Zokuklama
Ngenkathi i-API 650 iyikhodi yamathangi okugcina angama-atmospheric (ingcindezi ayidluli ku-2.5 psi), i-API 620 ihlanganisa amathangi akhelwe ukusebenza ngengcindezi efika ku-15 psig.
● Isikhala Sokuklama: Amathangi e-API 620 akhelwe ukubamba izinswelaboya ezingeke zivumeleke ethangini le-atmospheric.
● Izimo: Amathangi la avame ukuklanywa anezimo eziyingqayizivele zophahla—njengophahla oluthi "umbrella" noma "toriconical"—ukuze kulawulwe kahle ingcindezi ebekwa yizinswelaboya ezilondoloziwe.
● Izidingo Zezinto Ezisetshenziswayo: Ngenxa yengcindezi ephakeme kanye nezidingo ezithile zomkhiqizo, i-API 620 idinga ukujiya okunamandla, ukuhlolwa kokushisela (kuhlanganise ne-X-ray ephelele yamalunga), nezinqubo zokudambisa ingcindezi uma kuqhathaniswa nezindlela zokugcina ezingenawo umoya.
2. Ukusebenzisana: I-API 620 Shell + Uphahla Oluhlala Ngaphakathi Oluntantayo
Esikhathini sokugcina uketshezi oluvuvukayo, i-Internal Floating Roof (IFR) ifakwa ngaphakathi ethangini le-API 620. Le ngxube idala uhlelo olusebenza kahle kakhulu:
● Ukulawulwa Kwengcindezi: I-API 620 Shell ivumela ukuqoqwa kwezinhlamvu zomoya ezikhiqizwa umkhiqizo.
● Ukunciphisa Ukukhishwa: I-IFR intanta phezu koketshezi, ivimbe ngempumelelo isikhala esingenalutho (i-ullage) lapho izinsipho zingakheka khona ngokujwayelekile. Lokhu kusebenza njengokuvikela okuyinhloko ekulahlekelweni komkhiqizo nasezinsipho zemvelo.
● Ukuphindaphinda: Uma isicelo se-IFR singahluleka, umklamo we-API 620 uqinisekisa ukuthi ingaphandle letanki liqinile ngokwanele ukubamba ingcindezi eyenziwa ukwakheka kwezinsipho okubangelwa yikho, okunikeza isendlalelo esingeziwe sokuphepha.
3. Ukuhlaziywa Kobuchwepheshe Okuhambisanayo: I-API 620 vs. I-API 650
Ukuqonda ukuthi nini okufanele ucacise i-API 620 esikhundleni se-API 650 yisinqumo esibaluleke kakhulu onjiniyela bamaphrojekthi.
Isici | API 650 | API 620 |
Ingcindezi Ephezulu Yokusebenza | Kuze kufike ku-2.5 psi | Kuze kufike ku-15 psig |
Inhloso Eyinhloko | Ukugcina Okungokwemvelo | Isitoreji se-Low-Pressure/Vapor |
Ukuhlolwa kwe-Shell | I-Spot X-ray / Visual | I-Full X-ray / I-Stringent NDT |
Ukusetshenziswa Okujwayelekile | Uwoyela oluhlaza, amanzi, uwoyela osindayo | Ama-hydrocarbon alula avutha kalula, uketshezi oluqandisiwe |
I-Design Geometry | I-Flat/Cone Roof | I-Umbrella / Toriconical / Dome |
4. Izinzuzo Ezibalulekile Zobunjiniyela
Ukuhlanganisa i-IFR esitsheni se-API 620 kunikeza izinzuzo ezinkulu zokusebenza:
● Ukuthobela Izindinganiso Zemvelo: Kumikhiqizo enezinsipho eziphakeme ezingeqi imikhawulo yokubuyisa izinsipho yamathangi omoya, ukuhlanganiswa kobuchwepheshe be-API 620 ne-IFR kuqinisekisa ukuthobela imiyalelo kahulumeni nezindawo zezinsipho ze-VOC.
● Ukulahleka Komkhiqizo Okuncishisiwe: Ngokugcina uketshezi ngaphansi kophahla oluntantayo, ukubilisa kuyancipha. Amandla okucindezela e-API 620 asebenza njengesivikelo sesibili ngesikhathi sokushintsha kokushisa.
● Ukuphepha Okuthuthukisiwe: Umklamo uklanyelwe ngokukhethekile imikhiqizo enomoya, unciphisa kakhulu amathuba okwakheka kwezinhlanganisela zomoya-mpuphu ezivutha umlilo ngaphakathi kwesikhumba sethangi.
5. Imibuzo Evame Ukubuzwa (FAQ)
Q: Kungani usebenzisa ithangi le-API 620 esikhundleni sebhola elicindezelwe noma ithangi lesiqhwa?
A: Amathangi e-API 620 angozuzisa kakhulu emiqulwini emikhulu. Izindilinga nezinhlamvu yiziqukathi zengcindezi (i-ASME code) ezibiza kakhulu ukwakhiwa ukuze kugcinwe okukhulu. I-API 620 ihlanganisa isikhala ngokuvumela ukugcinwa okukhulu ngengcindezi ephansi kuneziqulathi zengcindezi ezijwayelekile.
Q: Ingabe kukhona uphahla oluhlala ngaphakathi oluntantayo olungafakwa ethangini le-API 620?
A: IFR kufanele ihambisane nomkhiqizo kanye nobukhulu bangaphakathi bethangi. Ngoba amathangi e-API 620 avame ukuba nezingxenye ezithile zophahla (njengophahla oluyindilinga oluyisithupha), imilenze yokusekela ye-IFR nezinhlelo zokuqondisa kufanele ziklanywe ngokukhethekile ukuze kuqinisekiswe ukuthi uphahla lungahamba luze luye phansi ethangini ngaphandle kokuphazamisa udonga noma isakhiwo sophahla.
Umbuzo: Ingabe la mathangi adinga ukuvunyelwa okukhethekile?
A: Yebo. Amathangi e-API 620 adinga amavalvu okuvunyelwa komfutho/okungenamoya (PVRVs) ukuze kulawulwe umfutho wangaphakathi futhi kuvinjelwe ukwehluleka kwesakhiwo ngenxa yokubhidlika komoya ngesikhathi sokukhipha, nokugcwala ngokweqile ngesikhathi sokugcwalisa noma ukushisa kwelanga.
Kubashayeli abaphatha uketshezi oluvutha kalula, amathangi e-API 620 anezimpahla zangaphakathi ezintantayo amele indinganiso egqamile yokulinganisa umthamo, ukuphepha, nokunakekelwa kwemvelo. Ngokudlula imikhawulo yesitoreji somoya, lezi zinhlelo zinikeza ingqalasizinda eqinile ekwazi ukubhekana nezidingo zesitoreji sezimboni zamanje nezokugcina amandla. Ukukhetha le ndlela kudinga ukuthobela ngokucophelela izimiso eziqinile ze-API 620 zokukhiqiza nokuhlola, ukuqinisekisa amashumi eminyaka enkonzo ethembekile.
Ungasesikhathini sokuqala sobunjiniyela sephrojekthi entsha yokugcina, noma ngabe uhlola ukuguqulwa kwethangi lomoya elikhona ukuba libe yindinganiso ye-API 620 ephansi?
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