Kungani Izingxenye Zevalvu Ezenziwe Ngokwezifiso Zibalulekile Ezicelweni Zezimboni
Ezimbonini eziningi ezigxile enqubweni, ivalvu ingaphezu nje kwedivayisi yokulawula ukugeleza kwamanzi—iyinto yokuphepha esebenzayo. Kungakhathaliseki ukuthi kusekuhlanzweni kwe-petrochemical, ekuthuthweni kwegesi, noma ezinhlelweni zokwelashwa kwamanzi ezisindayo, ukusebenza kwevalvu kuncike kakhulu ezingxenyeni zayo: umzimba, isiqu, isihlalo, kanye nokuxhuma konke kunegalelo ekuqineni nasekuthembekeni kokuvala.
Ama-valve ajwayelekile, nakuba etholakala kabanzi, avame ukwehluleka ezindaweni zokusebenza ezidinga amandla. Lapho izilinganiso zokucindezela, ukuguquguquka kokugeleza, kanye nemidiya egqwalisayo kuhluka kusuka kuphrojekthi kuya kuphrojekthi, izixazululo ezitholakala eshalofini zingaletha izingozi ezingadingekile—ikakhulukazi ekusebenzeni lapho isikhathi sokungasebenzi sisho ukulahlekelwa okukhulu kwezezimali.
Yilapho izingxenye zevalvu ezenziwe ngokwezifiso zinikeza khona izinzuzo ezihlukile. Njengoba zakhiwe ngokwezimo zokusebenza ezithile, izingxenye ezenziwe ngokwezifiso zingalinganiswa ngokunembile nobubanzi bokucindezela kwesistimu, uhlobo lwemidiya, kanye nejiyometri yokufaka. Isibonelo, isiqu sevalvu esisetshenziswa endaweni yegesi enesibabule esiningi singadinga ukukhethwa kwezinto ezahlukene—njenge-17-4PH noma i-Inconel—uma kuqhathaniswa nesiqu esisetshenziswa emigqeni yamanzi ahlanzekile anokucindezela okuphansi.
Ukukhethwa kwezinto zevalvu, kusukela ku-WCB carbon steel kuya ku-CF8M stainless noma ngisho ne-Duplex alloys, nakho kuthinta ukumelana nokugqwala, ukuzinza kobukhulu, kanye nomjikelezo wempilo. Ngaphezu kwalokho, ikhono lokucacisa ukwelashwa kwendawo—njengokuqhumisa isihlabathi, ukudlulisa i-passivation, noma i-nitriding—kunezela olunye ungqimba lokulawula ekwenzeni ngcono ubude besikhathi sevalvu.
Ifektri yethu isebenze nabahlanganisi bezinhlelo, ama-OEM, kanye nabakhi be-EPC iminyaka engaphezu kwamashumi amabili ukuhlinzeka ngezingxenye zevalvu ezenziwe ngokwezifiso ezenzelwe ukusebenza kwensimu yesikhathi eside. Ingxenye ngayinye yevalvu yenziwe ngokunaka ukubekezelelana kobukhulu kanye nobuqotho bomshini, okuqinisekisa ukulingana okuqinile ngaphakathi kokuhlanganiswa okuphelele. Kumavalvu asebenzayo, siphinde sinikeze ama-coupling nama-bracket anembile ukuqinisekisa ukuhambisana ngaphansi kwezimo eziguquguqukayo.
Ezimweni eziningi, onjiniyela beza kithi lapho ivalvu engenisiwe ihluleka ngaphambi kwesikhathi—hhayi ngenxa yekhwalithi embi iyonke, kodwa ngoba ingxenye encane eyodwa yayingahambisani nesistimu eyayifakwe kuyo. Izingxenye zevalvu ezenziwe ngokwezifiso, ezakhelwe ukudweba noma eziklanywe kabusha, zivumela ukushintshwa okuqondile ngaphandle kokuphazamisa ukusebenza noma ukulawulwa kokugeleza.
Ukukhetha umhlinzeki wezingxenye zevalvu ngokwezifiso akukhona nje ukunemba komshini. Kumayelana nokuqonda ukuthi ivalvu iziphatha kanjani ngaphansi kokucindezeleka—ukwanda kokushisa, ukucindezela okukhulu, noma imidiya ehlukumezayo—nokuthi izinguquko ezincane ku-geometry yezingxenye zingaxazulula kanjani izinkinga eziphindaphindayo ensimini.
Kungakhathaliseki ukuthi uhlelo lwe-LNG olusezingeni eliphansi lokushisa noma i-loop yomusi enengcindezi ephezulu, ukutshala imali ezingxenyeni zamavalvu ezifanelana kahle kunikeza indlela ethembekile yokuvala okuncane, ukusebenza okuphephile, kanye nezindleko ezithuthukisiwe zobunikazi.