Imanuwali Yokusebenza Nokulungisa Ye-Cast Steel Gate Valves

1. Okujwayelekile

Amavalvu alolu chungechunge asetshenziselwa ukuvala noma ukuvula amapayipi ohlelweni lwamapayipi ukuze kugcinwe ukusebenza okuvamile kohlelo.

2. Incazelo Yomkhiqizo

2.1 Imfuneko yesu

2.1.1 Dizayina futhi wenze: API600, API603, ASME B16.34, BS1414

2.1.2 Ubukhulu bokuphela kokuxhuma:ASME B16.5, ASME B16.47, ASME B16.25

2.1.3 Ubuso nobuso noma ekupheleni ukuya ekupheleni:ASME B16.10

2.1.4 Ukuhlola nokuhlola:API 598, API600

2.1.5 Osayizi Abazisholo:MPS2″～48″,Izilinganiso zekilasi lokuzisholo:Class150~2500

2.2 Amavalvu alolu chungechunge angama-manual (acushwe ngesondo lesandla noma ngebhokisi legiya) amavalvu esango aneziphetho ze-flange kanye nesiphetho sokushisela izinqe .Isiqu se-valve sinyakaza sibheke phezulu. Uma ujikisa isondo lesandla ngokwewashi, isango liyawa ukuze livale ipayipi; uma ujikisa isondo lesandla ngokuphambene newashi, isango liyaphakama ukuze livule ipayipi.

2.3 Isakhiwo bheka Fig.1, 2 and3.

2.4 Amagama nezinto zezingxenye ezisemqoka zibalwe kuThebula loku-1.

(Ithebula 1)

3. Isitoreji, ukugcinwa, Ukufakwa kanye nokusebenza

3.1 Ukugcina nokunakekela

3.1.1 Amavalvu kufanele agcinwe egumbini elomile nelinomoya okahle. Iziphetho zephaseji kufanele zixhunywe ngekhava.

3.1.2 Amavalvu angaphansi kokugcinwa isikhathi eside kufanele ahlolwe futhi ahlanzwe njalo, ikakhulukazi ukuhlanzwa kwendawo yokuhlala ukuze kuvinjelwe umonakalo, futhi izindawo eziqediwe kufanele zigcotshwe ngamafutha avimbela ukugqwala.

3.1.3 Uma isikhathi sokugcina singaphezu kwezinyanga eziyi-18, amavalvu kufanele ahlolwe futhi kwenziwe amarekhodi.

3.1.4 Amavalvu afakiwe kufanele ahlolwe futhi alungiswe njalo. Amaphuzu okunakekela abalulekile ahlanganisa lokhu okulandelayo:

1) Ukuvala ubuso

2) Isiqu se-valve ne-valve stem nut.

3) Ukupakisha.

4) Ukungcola endaweni yangaphakathi yomzimba we-valve kanye nebhonethi yevalvu

3.2 Ukufakwa

Ngaphambi kokufaka, qiniseka ukuthi ukuhlonzwa kwevalvu (okufana nemodeli, i-DN, 3.2.1PN nezinto ezibonakalayo) kumakwe ngokwezidingo zesistimu yamapayipi.

3.2.2 Ngaphambi kokufaka, hlola ngokucophelela iphaseji yevalvu kanye nobuso bokuvala. Uma kukhona ukungcola, kuhlanze kahle.

3.2.3 Ngaphambi kokufaka, qiniseka ukuthi wonke amabhawodi aboshwe ngokuqinile.

3.2.4 Ngaphambi kokufaka, qiniseka ukuthi ukupakisha kucindezelwe ngokuqinile. Nokho, ukunyakaza kwesiqu se-valve akufanele kuphazanyiswe.

3.2.5 Indawo yokufaka ivalvu kufanele yenze kube lula ukuhlola nokusebenza. Indawo ekhethwayo kufanele kube ukuthi ipayipi livundlile, isondo lesandla lingaphezulu, nesiqu se-valve sime mpo.

3.2.6 Ngevalvu evamise ukuvaleka, akufanelekile ukuyifaka endaweni lapho ingcindezi yokusebenza inkulu kakhulu ukugwema ukulimala kwesiqu se-valve.

3.2.7 Amavalvu ashiselwe amasokhethi kufanele okungenani ahlangabezane nezidingo ezilandelayo uma eshiselwe ukuze afakwe ohlelweni lwamapayipi esizeni:

1) Ukushisela kufanele kwenziwe ngumshiseli onesitifiketi sokufaneleka sokushisela esigunyazwe yiSigungu Sikahulumeni Sokushisela Nomshini Wokucindezela; noma umshiseli othole isitifiketi sokufaneleka sokushisela esichazwe ku-ASME Vol.Ⅸ.

I-2) Imingcele yenqubo ye-Welding kufanele ikhethwe njengoba kuchazwe kubhukwana lokuqinisekisa ikhwalithi yezinto zokushisela.

3) Ukwakheka kwamakhemikhali, ukusebenza kwemishini kanye nokumelana nokugqwala kwensimbi yokugcwalisa yomthungo wokushisela kufanele kuhambisane nesisekelo sensimbi.

3.2.8 Ivalvu ivamise ukufakwa, ingcindezi enkulu ngenxa yezisekelo, izesekeli namapayipi kufanele kugwenywe.

3.2.9 Ngemva kokufakwa, ngesikhathi sokuhlolwa kwengcindezi yohlelo lwamapayipi, i-valve kufanele ivuleke ngokugcwele.

3.2.10 Iphuzu okubelwa ngalo: uma ipayipi linamandla anele okuthwala isisindo sevalvu kanye netorque yokusebenza, lapho-ke akukho ndawo yokubhodla edingekayo, ngaphandle kwalokho i-valve kufanele ibe nephuzu lokushutheka.

3.2.11 Ukuphakamisa: ungasebenzisi isondo lesandla ukuze uphakamise futhi uphakamise ivalvu.

3.3 Ukusebenza nokusetshenziswa

3.3.1 Ngesikhathi sokusevisa, isango lamavalvu kufanele livuleke ngokuphelele noma livalwe ngokugcwele ukugwema ukulimala ngaphezulu kweringi yesihlalo nesango levalvu ngenxa yesivinini esikhulu. Angeke isetshenziselwe ukulungisa umthamo wokugeleza.

3.3.2 Uma uvula noma uvala ivalvu, sebenzisa isondo lesandla esikhundleni selever eyisiza noma sebenzisa elinye ithuluzi.

3.3.3 Ezingeni lokushisa lokusebenza, qiniseka ukuthi ingcindezi esheshayo ingaphansi kuka-1.1 izikhathi zengcindezi yokusebenza yezilinganiso zezinga lokushisa ku-ASME B16.34.

3.3.4 Izinto ezisetshenziswayo zokusiza ezokuphepha kufanele zifakwe epayipini ukuze kuvinjelwe ukucindezela kokusebenza kwevalvu ekushiseni okusebenzayo ukuthi kudlule ukucindezela okuphezulu okuvumelekile.

3.3.5 Ukushaywa nokushaqisa i-valve akuvunyelwe ngesikhathi sokuthutha, ukufakwa kanye nesikhathi sokusebenza.

3.3.6 Ukubola koketshezi olungaqinile, isibonelo, ukubola kolunye uketshezi kungabangela ukwanda kwevolumu futhi kuholele ekukhuphukeni komfutho osebenzayo, ngaleyo ndlela kulimaze i-valve futhi kubangele ukungena, ngakho-ke, sebenzisa amathuluzi okulinganisa afanelekile ukuze uqede noma unciphise izici ezingase zibangele ukubola. yoketshezi.

3.3.7 Uma uketshezi kuyi-condensate, lokhu kuzothinta ukusebenza kwevalvu, sebenzisa izinsimbi zokulinganisa ezifanele ukunciphisa izinga lokushisa loketshezi (isibonelo, ukuqinisekisa izinga lokushisa elifanele loketshezi) noma esikhundleni salo ufake olunye uhlobo lwevalvu.

3.3.8 Ngoketshezi oluzikhukhumeza ngokwalo, sebenzisa amathuluzi okulinganisa afanelekile ukuze uqinisekise ukuthi indawo ezungezile kanye nengcindezi yokusebenza ingeqi indawo yayo yokuzithungela (ikakhulukazi qaphela ukukhanya kwelanga noma umlilo wangaphandle).

3.3.9 Uma kuba noketshezi oluyingozi, njengokuqhuma, oluvuthayo. Imikhiqizo enobuthi, i-oxidation, ayivunyelwe ukufaka esikhundleni sokupakisha ngaphansi kwengcindezi (nakuba i-valve inomsebenzi onjalo).

3.3.10 Qinisekisa ukuthi uketshezi alungcolile, okuthinta ukusebenza kwevalvu, aluqukethe izinto eziqinile, ngaphandle kwalokho amathuluzi okulinganisa afanele kufanele asetshenziselwe ukususa ukungcola nokuqinile, noma esikhundleni salo kufakwe olunye uhlobo lwevalvu.

3.3.11 Izinga lokushisa elivumelekile lokusebenza:

3.3.12 Qinisekisa ukuthi i-material ye-valve yomzimba ifanele ukusetshenziswa endaweni ekwazi ukumelana nokugqwala kanye nokuvimbela ukugqwala.

3.3.13 Ngesikhathi sesevisi, hlola ukusebenza kokuvala njengokusho kwethebula elingezansi:

3.3.14 Njalo uhlole ukuthi ubuso obuvaliwe bugqokile yini. Ukupakisha ukuguga nokulimala. Yenza ukulungisa noma ukushintshwa ngesikhathi uma ubufakazi butholakala.

3.3.15 Ngemva kokulungiswa, hlanganisa kabusha futhi ulungise ivalvu, ukusebenza kokuqina kokuhlola bese ubhala irekhodi.

3.3.16 Ukuhlolwa nokulungisa kwangaphakathi iminyaka emibili.

4. Izinkinga ezingenzeka, izimbangela kanye nezinyathelo zokulungisa

Qaphela: Umsebenzisi kufanele abe nolwazi olufanele kanye nesipiliyoni ngamavalvu.

5. Iwaranti

Ngemuva kokuthi i-valve isetshenzisiwe, isikhathi sewaranti yevalvu yizinyanga eziyi-12, kodwa asidluli izinyanga ezingama-24 ngemuva kosuku lokulethwa. Ngesikhathi sewaranti, umenzi uzohlinzeka ngesevisi yokukhanda noma izingxenye ezisele mahhala ngomonakalo odalwe yimpahla, ubungcweti noma umonakalo inqobo nje uma lokho kusebenza kulungile.