Iyini i-Emergency Shutdown Valve (ESDV): Isimiso Sokusebenza

Iyini i-Emergency Shutdown Valve (ESDV)

Ezweni elibaluleke kakhulu lezimboni zezinqubo zezimboni, ikakhulukazi izindawo zokuhluza uwoyela negesi, izimboni zamakhemikhali, kanye nezindawo zokuphehla ugesi, ukuphepha akuyona nje into eza kuqala - kuyinto ebaluleke kakhulu. Enhliziyweni yokuvikela abasebenzi, ukuvikela imvelo, kanye nokuvimbela umonakalo omkhulu wempahla kukhona umshini obalulekile:I-Valve Yokuvala Okuphuthumayo(I-ESDV), futhi okuvame ukubizwa ngokuthi njeIvalvu Yokuvala (I-SDV)ngaphakathi kwezinhlelo ze-Safety Instrumented Systems (SIS).

I-ESDV iyi-i-valve ekhethekile, esebenza ngokuzenzakalelayoeyenzelwe injongo eyodwa ebalulekile: ukuhlukanisa ngokushesha nangokuthembekile izingxenye zokugeleza kwenqubo (uketshezi, amagesi, noma uketshezi olunezigaba eziningi) uma kwenzeka isimo esiphuthumayo esichazwe kusengaphambili. Ngokungafani nama-valve okulawula alawula ukugeleza kokulawulwa kwenqubo, ama-ESDV angabasebenzi ababili - avuleke ngokuphelele (avumela ukugeleza ngesikhathi sokusebenza okuvamile) noma avaliwe ngokuphelele (avimba ukugeleza ngesikhathi sokuphuthumayo). Umsebenzi wawo oyinhloko ukusebenza njengeisithiyo esiyinhloko esingokomzimbaukuvimba ukukhishwa kwezinto eziyingozi okungalawulwayo lapho kudlulwa imingcele ebalulekile yokuphepha.

Kungani ama-ESDV Engaxoxiswani Ngokuphepha

Imiphumela yokwehluleka ukuhlukanisa ukugeleza kwenqubo ngesikhathi sezimo eziphuthumayo ezifana nomlilo, ukuvuza, ukucindezela ngokweqile, ukwehluleka kwemishini, noma ukulahlekelwa ukulawulwa kungaba yinto ebuhlungu kakhulu. Ama-ESDV ayizingxenye ezibalulekile ze-Safety Instrumented Functions (SIFs) ngaphakathi kwe-Safety Instrumented System (SIS) ebanzi. Lezi zinhlelo zakhiwe ngokwezindinganiso zomhlaba wonke eziqinile (IEC 61511 / ISA 84) futhi zabelwa amazinga obuqotho bokuphepha (SIL) ngokusekelwe ekunciphiseni ubungozi okumele bafinyelele.

Izici Eziyinhloko Zokuchaza i-ESDV:

1. Umklamo Ophephile:Lesi yisimiso esiyisisekelo. Ama-ESDV aklanyelwe ukuhambisa *ngokuzenzakalela* esimweni sawo esiphephile (cishe njaloivaliwe ngokuphelele, kodwa ngezinye izikhathi *ivuleka* ezimweni ezithile ezifana nokunikezwa kwamanzi okupholisa ngesikhathi somlilo) lapho kulahleka umthombo wamandla oshukumisayo (ugesi, umfutho womoya, umfutho we-hydraulic) noma lapho kutholwa isignali ethile yokuhamba evela ku-SIS. Lokhu kuqinisekisa ukuphepha noma ngabe isitshalo silahlekelwa ugesi noma ukulawula.

2. Ukuthembeka Okuphezulu Nokutholakala:Ama-ESDV adlula ezinqubweni zokuklama, zokukhiqiza, zokuhlola, kanye nezesitifiketi eziqinile. Kumelwe asebenze ngokufunwa, njalo. Ukuphindaphinda kwezingxenye ezibalulekile (njenge-solenoids) kuvamile.

3. Isikhathi Sokuvala Esisheshayo:Isivinini sibalulekile ezimweni eziphuthumayo. Ama-ESDV anqunyelwe ukuvala phakathi nesikhathi esifushane kakhulu, ngokuvamileImizuzwana eyi-1 kuya kwemi-5, kuye ngobukhulu bevalvu, uhlobo, kanye nesidingo esithile sokuphepha (izinga le-SIL).

4. Ukuvalwa Okuhle:Uma ivaliwe, ama-ESDV kumele ahlinzekeuphawu oluqinile njengebhamuzaukuvimbela noma yikuphi ukuvuza koketshezi lwenqubo oluyingozi.

5. Ukwakhiwa Okuqinile:Yakhelwe ukumelana nezimo zenqubo ezinzima (umfutho ophezulu, izinga lokushisa, uketshezi oluqothulayo) kanye nokuchayeka emlilweni okungenzeka (umklamo ophephile emlilweni ngokwe-API 607/6FA, i-ISO 10497 ivame ukuba yimpoqo).

6. Ukulawula Okuzimele:Ama-ESDV athola isignali yawo yokuhamba ngqo kusuka ku-Safety Instrumented System (SIS) ezinikele, hhayi ohlelweni lokulawula inqubo olujwayelekile (BPCS). Lokhu kuhlukaniswa kubalulekile ukuze kube nokwethenjelwa.

Ukubona Ukuphepha: Ukumelwa kwe-P&ID yeValvu Yokuvala Okuphuthumayo

Imidwebo Yamapayipi kanye Nezinsimbi (i-P&ID) ulimi olusetshenziswa kakhulu onjiniyela bezinqubo. Ama-ESDV anezimpawu ezihlukile zokuwahlukanisa kwezinye izinhlobo zamavalvu futhi abonisa ngokucacile indima yawo ebalulekile yokuphepha.

* Uphawu lweValve Ejwayelekile:Uphawu oluyisisekelo luncike ohlotsheni lwevalvu:

* I-Ball Valve:Onxantathu ababili ababheke indilinga (abamele ibhola).

* I-Valve yeSango:Unxande oshelelayo phakathi kwemigqa emibili eqondile (emele isango nomzimba).

* Ivalvu Yebhabhathane:Umugqa oqondile ohlukanisa indilinga phakathi (omele idiski nomzimba).

* Uphawu lwe-Actuator:Isihlonzi esiyinhloko se-ESDV/SDV uphawu lwayo lwe-actuator oluxhunywe emzimbeni we-valve:

* Aisikweleuphawu lwe-valve oluzungeze i-valve luvame ukumelela i-actuator.

* Ku-ESDV, lesi sikwele ngokuvamile sibakugcwaliswe ngombala omnyama oqinilenomakuchanyuselwe.

* Izincwadi"I-ESD", "SD"noma"XV"(lapho u-X esho khona isihlonzi esithile, ngokuvamile u-'S' wokuvala) kuboniswa ngokusobala eduze noma ngaphakathi kophawu lwe-actuator.

* Isenzo Sokwehluleka:Isenzo sokuphepha siboniswa izimpawu eziseduze ne-actuator:

* I-FC (Ukuvalwa Okungaphumelelanga):Umcibisholo okhomba umzimba wevalvu noma izinhlamvu ezithi “FC”. Okuvame kakhulu kuma-ESDV.

* I-FO (Ayivuleki):Umcibisholo okhomba kude nomzimba wevalvu noma izinhlamvu ezithi “FO”. Kusetshenziswa ezimweni ezithile.

* Ibhamuza Lensimbi Nenombolo Yethegi:I-ESDV ihlala ixhunywe ku-SIS. Umsebenzi wayo uboniswa yi-ibhamuza lezinsimbi(ngokuvamile iheksagoni noma indilinga) exhunywe kuphawu lwe-valve actuator ngomugqa onamachashazi. Inombolo yethegi ngaphakathi kwebhamuza ilandela amazinga esitshalo kodwa iyikhomba ngokusobala njengengxenye ye-SIS (isb., ZV-1001, lapho u-'Z' evame ukumelela i-SIS/ESD, 'V' yevalvu).

Isimiso Esiyinhloko: Isebenza Kanjani Ivalvu Yokuvala Okuphuthumayo

Umgomo wokusebenza uncike ku-ukuphepha kokwehlulekaumklamo kanye nempendulo ye-actuator kusignali noma ukulahlekelwa amandla. Nasi incazelo:

1. Ukusebenza Okuvamile:I-ESDV ibanjwe ku-VULIWEisikhundla. Lokhu kudinga amandla:

* Ama-Actuator Okubuyisa I-Spring-Return:I-actuator (i-pneumatic/hydraulic) isebenzisa ingcindezi enikeziwe ukuze *icindezele* isiphethu esinamandla, ibambe ivalvu ivuleke ngokumelene namandla esiphethu.

* Abaqhubi Bezimoto (Okungavamile Kancane ku-ESD):Injini ibamba ivalvu ivuliwe (noma ivaliwe) ngokumelene nebhuleki noma isipilingi somshini. Ukulahlekelwa amandla kubangela isenzo sokuphepha.

2. Isimo Esiphuthumayo Esitholiwe:Izinzwa (izithumeli zokucindezela, izinzwa zokushisa, izitholi zomlilo, izitholi zegesi, njll.) zithumela isignali ku-SIS logic solver ekhombisa ingozi enkulu.

3. Isignali Yohambo lwe-SIS:Isixazululi se-SIS logic, ngokusekelwe ku-logic yaso yokuphepha ehleliwe, sinquma ukuthi uhambo luyadingeka. Sithumelaisignali kagesiku-valve(ama-valve) ye-solenoid ye-ESDV.

4. I-Actuator Energy Dump (Isinyathelo Esiyinhloko):

* Ukubuya Kwentwasahlobo:I-valve(ama-valve) ye-solenoid ikhipha amandla ngokushesha, ikhipha umoya/ingcindezi yamanzi ngokushesha *kusuka* ku-actuator. Amandla agciniwe esiphethwini esinamandla acindezelwe ayakhishwa.

* Amandla Okuvala:Amandla entwasahlobo (noma ngezinye izikhathi ingcindezi ye-hydraulic egciniwe) anqoba noma yimaphi amandla aphikisanayo futhi aqhube isiqu se-actuator ukuthi sijikeleze (ibhola/uvemvane) noma siphakamise/sehlise (isango) ilungu lokuvala ivalvu.

5. Ukuvalwa kweValve:Ilungu lokuvala (ibhola, isango, idiski) lihamba ngokushesha liyeKUVALIWE ngokupheleleisikhundla, okuvimba ngokomzimba indlela yokugeleza kwenqubo.

6. Ukuhlukaniswa Okufeziwe:Uketshezi lwenqubo oluyingozi luqukethwe engxenyeni ehlukanisiwe engenhla kwe-ESDV, okuvimbela ukwanda kwesigameko.

Imisipha Engemuva Kwesenzo: Ama-Actuator E-Emergency Shutdown Valve

I-actuator iyisiphehli samandla esiguqula isignali yokulawula (noma ukulahlekelwa amandla) ibe amandla omshini adingekayo ukuhambisa ivalvu ngokushesha nangokuthembekile. Ukukhetha i-actuator efanele kubalulekile ekusebenzeni kwe-ESDV.

Izinhlobo Ezivamile Ze-ESDV Actuator:

1. Ama-Actuator e-Diaphragm e-Spring-Return asebenza emoyeni:

* Isimiso:Umfutho womoya ocindezelwe usebenza ku-diaphragm enkulu ukuze ucindezele isipilingi, ubambe ivalvu ivulekile. Umoya olahlayo (nge-solenoid valve) ukhulula isipilingi, uvale ivalvu.

* Izinzuzo:Kulula, kuthembekile, kusebenza ngokushesha, kuphephile ngokwemvelo (akukho zinhlansi), kutholakala kalula umoya.

* Ububi:Amandla alinganiselwe kuma-valve amakhulu kakhulu noma ukucindezela okuphezulu komehluko, kudinga ukunikezwa komoya ohlanzekile/owomile, okungenzeka ukuthi kusebenze kancane ezindaweni ezibandayo kakhulu.

* Ukusetshenziswa Okuvamile:Ama-valve ebhola amancane kuya kwaphakathi kanye nama-valve e-butterfly.

2. Ama-Hydraulic Spring-Return Piston Actuators:

* Isimiso: Umfutho woketshezi lwe-hydraulic usebenza episton ukuze ucindezele isiphethu esinamandla, ubambe ivalvu ivulekile. Ivalvu ye-Solenoid ilahla umfutho we-hydraulic, isiphethu sivala ivalvu.

* Ochwepheshe: Ukukhishwa kwamandla aphezulu kakhulu kufaneleka kuma-valve amakhulu, ama-valve esango, kanye nokusetshenziswa kokucindezela okuphezulu. Ngokuvamile kushesha kune-actuator enkulu yomoya. Iqinile.

* Ububi: Idinga iyunithi yamandla kagesi (i-HPU), ukufakwa okuyinkimbinkimbi kakhulu, amathuba okuvuza koketshezi, nokugcinwa okuphezulu.

* Ukusetshenziswa Okuvamile: Amavalvu amakhulu ebhola, amavalvu esango, ukusetshenziswa komfutho ophezulu (ikakhulukazi izinhloko zemithombo kawoyela negesi, amapayipi).

3. Ama-Actuator e-Scotch-Yoke noma e-Rack & Pinion e-Pneumatic/Hydraulic (entwasahlobo-ebuyayo):

* Isimiso: Guqula ukunyakaza kwe-piston/diaphragm okuqondile kube ukunyakaza okujikelezayo nge-scotch-yoke noma i-rack kanye ne-pinion mechanisms. I-Spring-return inikeza isenzo esiphephile.

* Ochwepheshe: Ukukhishwa kwe-torque okuhle kakhulu kulo lonke ukushaya, ukwakheka okuqinile (i-rack & pinion), kufanelekile kuma-valve ajika ngekota (ibhola, uvemvane, ipulaki). Kuhlanganisa izinzuzo zamandla/isivinini.

* Ububi: Kungaba yinkimbinkimbi kakhulu kuneziqalisi ze-diaphragm eziyisisekelo.

* Ukusetshenziswa Okuvamile: Uhlu olubanzi lwama-valve ebhola ne-butterfly.

4. Ama-Actuator Emoto Kagesi (ane-Backup yebhethri/i-Fail-Safe Spring):

* Isimiso: Injini kagesi iqhuba ivalvu ivuleke noma ivalwe. Ukuze kusetshenziswe i-ESDV, *kumele* ifakeindlela yokuphepha kwemishini, ngokuvamile isipilingi, esisebenza lapho ugesi uphelelwa amandla ukuze sishayele ivalvu esimweni sayo esiphephile. Ukusekela ibhethri kungase kunikeze amandla injini kohambo lokugcina uma ugesi uphela *ngemva* kokuthola isignali kodwa ngaphambi kokuvalwa.

* Ochwepheshe: Asikho isidingo sezinhlelo zomoya/zamanzi, indawo eqondile (nakuba kungadingeki ku-ESD), i-torque ephezulu.

* Ububi: Izikhathi zokuvala ezisheshayo uma kuqhathaniswa namandla/isiphethu esiwuketshezi, izindleko eziphezulu, ubunzima bokusebenza kwesiphethu, ingozi engaba khona yenhlansi (kudinga isitifiketi sezindawo eziyingozi).

* Ukusetshenziswa Okuvamile: Izindawo lapho ukunikezwa komoya/i-hydraulic kungasebenzi khona, noma kuma-valve amancane lapho isivinini singesibi kakhulu. Akuvamile kakhulu kwizicelo ze-ESDV ezisheshayo kakhulu kune-spring-return enamandla oketshezi.

Njalo Ngesibili Kubalwa: Isikhathi Sokuvala Ivalvu Yokuvala Esiphuthumayo

Isikhathi sokuvala cishe singenye yezincazelo zokusebenza ezibaluleke kakhulu ze-ESDV. Sithinta ngqo izibalo zokuqinisekiswa kwe-Safety Integrity Level (SIL) ze-Safety Instrumented Function (SIF).

* Kungani Isivinini Sibalulekile:Esimweni esiphuthumayo njengokuvuza okukhulu noma umlilo, inani lezinto eziyingozi ezikhishwa ngaphambi kokuhlukaniswa lilingana nesivinini sokugeleza kanye nesikhathi esithathwa yivalvu ukuvala. Ukuvalwa okusheshayo kunciphisa ukukhululwa, kunciphisa ubukhali besigameko (usayizi womlilo, ukusabalala kwamafu anobuthi, ukuchitheka kwemvelo).

* Izidingo Ezijwayelekile:Izikhathi zokuvala ze-ESDV zivame ukucaciswa ebangeniImizuzwana eyi-1 kuya kwemi-5kusukela ekuqaleni kwesignali yohambo kuya ekufinyeleleni ukuvalwa okugcwele nokuvalwa. Amavalvu amancane (isb., 2-6 intshi) avame ukufinyelela imizuzwana eyi-1-2. Amavalvu amakhulu (isb., 24 intshi+) noma amavalvu esango angadinga imizuzwana emi-5 noma ngaphezulu kancane, yize ukushesha kuhlale kufiseleka.

* Izici Ezithonya Isikhathi Sokuvala:

* Usayizi weValve kanye nohlobo:Amavalvu amakhulu anobunzima obukhulu bokuhamba. Amavalvu esango adinga ukushaywa okuqondile okude kunamavalvu ebhola/uvemvane ajika ngekota.

* Uhlobo kanye nosayizi we-Actuator:Ama-actuator e-hydraulic ngokuvamile avala ama-valve amakhulu ngokushesha kune-pneumatic. Usayizi we-actuator (amandla entwasahlobo anele/indawo ye-piston) ubalulekile.

* Izimo Zenqubo:Ukucindezela okuphezulu komehluko kulo lonke ivalvu kudala ukuvalwa okuphambene namandla, okudinga i-actuator enamandla kakhulu.

* Ukuqina Nokungqubuzana:Ukungqubuzana kwesiqu se-valve kanye nokungqubuzana kwezingxenye zangaphakathi kumele kuncishiswe.

* Isivinini se-Solenoid Valve:I-valve ye-solenoid kumele ikhiphe umoya ngokushesha okukhulu.

* Ukulibaziseka Kwesistimu Yokulawula:Isikhathi sokuba i-SIS logic solver icubungule isignali futhi inike amandla/isuse amandla i-solenoid sinezela esikhathini sonke (nakuba ngokuvamile ama-millisecond).

* Ukuhlolwa:Ukuhlolwa Kokushaywa Kwesihlungu Okungaphelele (i-PST) kuqapha ukunyakaza kwevalvu ngaphandle kokuhamba okugcwele, kodwa Ukuhlolwa Kokushaywa Kwesihlungu Okugcwele (i-FST) ngesikhathi sokuvalwa okuhleliwe kubalulekile ukuqinisekisa ukuthi isikhathi sangempela sokuvala sihlangabezana nezimfuneko. Ama-ESDV asebenza kahle kakhulu avame ukuba nezinkomba zomshini zendawo ezibonisa isimo sokuvalwa.

I-Anatomy Yokuphepha: Izingxenye Zevalvu Yokuvala Okuyisihluthulelo

Ukuqonda izingxenye eziyinhloko ze-ESDV assembly kubalulekile:

1. Umzimba weValve:Ingxenye eyinhloko equkethe ingcindezi, egcina izingxenye zangaphakathi. Yakhiwe ngezinto eziqinile (insimbi yekhabhoni, insimbi engagqwali, ama-alloy) ezifanelekela ingcindezi, izinga lokushisa, kanye nokugqwala koketshezi. Kufaka phakathi iziphetho ezigobile, ezihlanganisiwe, noma ezinentambo zokuxhuma amapayipi. Umklamo ophephile emlilweni ngokwe-API 607/6FA, i-ISO 10497 ubalulekile.

2. Ibhonethi:I-assembly exhumanisa umzimba we-valve ne-actuator, enikeza umngcele wokucindezela ozungeze isiqu. Ihlanganisa ukupakisha ukuvimbela ukuvuza kwesiqu.

3. Sika:Izingxenye zangaphakathi ezilawula ukugeleza nokunikeza ukuvala:

* Ilungu Lokuvala:Ingxenye ehambayo ukuze ivimbele ukugeleza (Ibhola, Isango, Idiski/Ipuleti).

* Izihlalo:Izindawo ezicijile ngokunemba lapho ilungu lokuvala livala khona ukuze kufinyelelwe ekuvalekeni okuqinile. Ngokuvamile kuyaqina (i-elastomer njenge-PTFE) noma insimbi ibe yinsimbi. Kubalulekile ekusebenzeni kwe-ESDV.

* Isiqu:Ixhuma i-actuator nelungu lokuvala, idlulisa ukunyakaza. Kumelwe imelane nokucindezelwa/i-torque ngaphandle kokugoba noma ukuphuka.

4. I-Actuator:Njengoba kuchaziwe ngaphambilini (i-Pneumatic Diaphragm, i-Hydraulic Piston, i-Scotch-Yoke, i-Rack & Pinion, i-Electric ene-Spring). Inikeza amandla nokunyakaza.

5. Amavalvu e-Solenoid:Amavalvu asebenza ngogesi alawulwa yi-SIS. Aqondisa noma akhiphe umoya/ingcindezi yamanzi iye/isuka ku-actuator ukuze aqale ukuvula noma ukuvala (ngokubalulekile). Ama-solenoid angasebenzi kahle (2oo2, amavoti angu-2oo3) avamile ekusetshenzisweni kwe-SIL ephezulu.

6. Ama-Limit Switches/Izindawo Zokudlulisa:Nikeza impendulo kagesi ohlelweni lokulawula (i-DCS/SIS) eqinisekisa indawo yangempela yevalvu (Ivuliwe, Ivaliwe, ngezinye izikhathi Ephakathi). Kubalulekile ekuqwashiseni opharetha kanye nokuxilongwa kwe-SIS.

7. Isikhombisi Sendawo:Ifulegi noma inkomba ebonakalayo yomshini ekhombisa isimo SOKUVULIWE/OKUVALIWE endaweni yevalvu.

8. Ukweqa ngesandla:Indlela yokusebenza (isondo lesandla, i-lever, iphampu yesandla ye-hydraulic) evumela opharetha ukuthi bavule noma bavale ivalvu ngesandla ngesikhathi sokulungiswa noma uma i-actuator yehluleka. Ayidluli umsebenzi wokuphepha ozenzakalelayo.

9. Izesekeli (Ngokuvamile zifakiwe):Izilawuli zokuhlunga umoya (zomoya), amavalvu okukhipha umoya ngokushesha (ukuvala ngokushesha), amathangi omthamo (ukugcina umoya ukuze ukwazi ukuhamba kanye uma uphelelwa amandla), amavalvu okukhiya.

Ulimi Lwemidwebo: Isifinyezo Sezimpawu Ze-Valve Yokuvala kanye Namazinga

Njengoba kuhlanganiswe esigabeni se-P&ID, uphawu lukhomba ngokucacile i-ESDV/SDV:

* Uphawu Lohlobo Lwevalvu:Ibhola (Onxantathu + Isiyingi), Isango (Unxande Oshelelayo), Uvemvane (Umugqa Odlula Esiyingini).

* Uphawu lwe-Actuator:Isikwele Esiqinile noma Esiqandisiwe esinamathiselwe kuphawu lwevalvu.

* Ukulebula:“ESD”, “SD”, noma “XV” kuphawulwe ngokucacile kuphawu lwe-actuator.

* Isenzo Sokwehluleka:Kuboniswe ukuthi “FC” (Fail Close – evame kakhulu) noma “FO” (Fail Open).

* Isixhumanisi se-SIS:Ibhamuza lensimbi (isb., iHexagon) elixhunywe ngomugqa onamadeshi ku-actuator, eliqukethe inombolo yethegi ye-SIS (isb., i-ZV-1001).

Izindinganiso Eziyinhloko:I-ISA-5.1 (Izimpawu Zokuhlonza Nokuhlonza) indinganiso eyinhloko eNyakatho Melika. I-ISO 14617 (Izimpawu Zemidwebo Yemidwebo) isetshenziswa emhlabeni wonke. Ukuvumelana ngaphakathi kwezindinganiso ze-P&ID zesitshalo kubaluleke kakhulu.

Uphawu lweValvu Yokuvala Okuphuthumayo

Abaqaphi bama-hydrocarbon: Ama-valve okuvala okuphuthumayo ku-oyili negesi

Imboni kawoyela negesi imele indawo ebaluleke kakhulu futhi ebaluleke kakhulu yokusetshenziswa kwama-ESDV. Imiphumela engaba khona yokwehluleka - imililo emikhulu, ukuqhuma, ukukhishwa okunobuthi, izinhlekelele zemvelo, kanye nokulahlekelwa yimpilo - mikhulu kakhulu. Ama-ESDV atholakala kuyo yonke iketanga lenani:

1. I-Upperstream (Ama-Wellheads, Amapulatifomu, ama-FPSO):

* Ama-ESDV e-Wellhead:Kufakwe ezihlahleni zikaKhisimusi (ngaphezulu/ngaphansi kolwandle) ukuze kuhlukaniswe imithombo ngayinye ezimweni eziphuthumayo (isb., ukuqhuma, umlilo). Ngaphansi kokucindezeleka okukhulu (imithombo ye-HPHT). Imininingwane ye-API 6A ivamile.

* Ama-ESDV e-Manifold/Pipeline:Hlukanisa izingxenye zemigqa yokugeleza, imigqa yokuqoqa, noma amapayipi okuthumela kwamanye amazwe kumapulatifomu noma kuma-FPSO. Imininingwane ye-API 6D. Umklamo ophephile emlilweni uyimpoqo.

* Inqubo Yokuqeqesha Ama-ESDV:Hlukanisa imishini emikhulu efana nezihlukanisi, ama-compressor, amaphampu uma kwenzeka umlilo noma ukwehluleka.

2. I-Midstream (Amapayipi, Iziteshi Zokuphampa/Zokucindezela):

* Ama-Block Valve (Ngokuvamile ama-ESDV):Kufakwe ngezikhathi ezithile eceleni kwamapayipi ukuze kuhlukaniswe izingxenye eziqhekekile, kunciphisa ivolumu yokuchitheka. Ukusebenza kude kusuka ezikhungweni zokulawula kuyinto ejwayelekile. I-API 6D.

* Isiteshi se-ESDV:Hlukanisa amaphampu, ama-compressor, amamitha, namathangi okugcina izinto ngaphakathi kweziteshi.

3. Ngaphansi komfula (Izindawo Zokuhluza, Izitshalo Ze-Petrochemical, Izindawo Zokugcina ze-LNG):

* Ama-ESDV okuhlukaniswa kweyunithi:Hlukanisa ngokushesha wonke amayunithi okucubungula (isb., i-Crude Distillation, i-FCCU, i-Hydrocracker) ngesikhathi somlilo omkhulu noma izenzakalo ezimbi kakhulu.

* Ukuvikelwa Kwemishini Ama-ESDV:Hlukanisa izitofu, ama-reactor, amakholomu, ama-compressor amakhulu.

* Ukulayisha/Ukukhipha ama-ESDV:Hlukanisa izikhali ezithwala imithwalo zasolwandle noma zesitimela ezimweni eziphuthumayo.

Izidingo Ezihlukile Zikawoyela Negesi:

* Izindinganiso Eziqinile:Izindinganiso ze-API zibusa: i-API 6A (Wellhead), i-API 6D (Ipayipi/Okujwayelekile), i-API 607/6FA (Ukuhlolwa Komlilo). I-ISO 10497 (Ukuhlolwa Komlilo) nayo iyasetshenziswa. Isitifiketi se-SIL ngokwe-IEC 61508/61511 sijwayelekile.

* Umklamo Ophephile Emlilweni:Ama-ESDV *kumele* agcine ubuqotho bokucindezela kanye nokulawula ukuvuza kwangaphakathi/kwangaphandle ngesikhathi nangemva kokuchayeka emlilweni (ngokuvamile imizuzu engama-30 ku-1400-1700°F). Lokhu kudinga ukupakisha okukhethekile kwesiqu, ama-bonnet anwetshiwe, izimbozo ze-graphite, kanye nemiklamo yezihlalo zensimbi.

* Ukukhethwa Kwezinto:Kumelwe uphathe isevisi emuncu (H2S – NACE MR0175/ISO 15156), ukucindezela okuphezulu (HPHT), amazinga okushisa acwebezelayo (LNG), kanye noketshezi olubolayo. Izinsimbi ezingagqwali ezimbili, i-Inconel, i-Monel zivamile.

* Ukusebenza Okuqinile:Ama-actuator e-hydraulic spring-return avame kakhulu ngenxa yezidingo zamandla aphezulu zama-valve amakhulu kanye nokucindezela okuphezulu komehluko, ikakhulukazi phezulu. Izinhlelo ezingasebenzi kahle zivamile.

* Ama-ESDV angaphansi kolwandle:Kumelela ukuthembeka okuphezulu kanye nobuchwepheshe, okwenzelwe ukujula okukhulu, ukucindezela, kanye nokusebenza kude ngaphandle kokufinyelela kokulungisa. Ukungasebenzi kahle kanye nokuthembeka okuphezulu kakhulu kubaluleke kakhulu.

Isiphetho: Isithiyo Esibalulekile

Ama-Emergency Shutdown Valve angaphezulu kakhulu kwama-valve; angabavikeli abaklanyiwe bokuphepha kwezimboni. Ukwakheka kwawo okuphephile, isenzo esisheshayo, ukuthembeka okuphezulu, kanye nendima ebalulekile ngaphakathi kwe-Safety Instrumented Systems kubenza babe umugqa wokugcina wokuzivikela ezigamekweni eziyingozi. Ukuqonda umsebenzi wabo, izingxenye, isimiso sokusebenza, kanye nezidingo eziqinile ezibekwe phezu kwabo - ikakhulukazi ezimbonini eziyingozi kakhulu njengowoyela negesi - kubalulekile konjiniyela, opharetha, kanye nochwepheshe bezokuphepha. Kusukela kuphawu oluku-P&ID kuya ku-valve enkulu epulatifomu yolwandle, i-ESDV imi njengomlindi obalulekile, ohlala elungele ukwenza okuthile lapho umzuzwana ngamunye ubalwa, evikela abantu, iplanethi, kanye nezimpahla ezingenakuqhathaniswa. Ukucaciswa okufanele, ukufakwa, ukuhlolwa okuqinile (kufaka phakathi i-PST ne-FST), kanye nokugcinwa ngokucophelela akunakuxoxiswana ngakho ukuqinisekisa ukuthi laba bavikeli abathule benza umsebenzi wabo wokusindisa impilo ngokungenaphutha lapho bebizwa.