INcwadana yoMsebenzi kunye noLondolozo-IiValufa zeSango leNsimbi yeNsimbi

3. Ukugcinwa, ukugcinwa, ukufakwa kunye nokusebenza

3.1 Ukugcinwa nokulondolozwa
3.1.1 Iivalvu kufuneka zigcinwe kwigumbi elomileyo nelingena umoya.Iziphelo zepaseji kufuneka ziplagwe ngezigqubuthelo.
3.1.2 Iivalve eziphantsi kokugcinwa kwexesha elide kufuneka zihlolwe kwaye zihlanjululwe rhoqo, ngakumbi ukucocwa kweendawo zokuhlala ukuze kuthintelwe umonakalo, kwaye iindawo ezigqityiweyo kufuneka zifakwe kwi-rust inhibiting oil.
3.1.3 Ukuba ixesha logcino lidlula iinyanga ezili-18, iivalvu kufuneka zivavanywe kwaye kubhalwe phantsi.
3.1.4 Iivalve ezifakiweyo kufuneka zihlolwe kwaye zilungiswe rhoqo.Awona manqaku aphambili olondolozo abandakanya oku kulandelayo:
1) Ukutywina ubuso
2)Isiqu sevalvu kunye ne-valve stem nut.
3)Ukupakisha.
4)Ukungcola kumphezulu wangaphakathi womzimba wevalvu kunye nebhonethi yevalvu
3.2 Ukufakela
Ngaphambi kofakelo, qiniseka ukuba ukuchongwa kwevalve (efana nemodeli, i-DN, 3.2.1PN kunye nezinto) ziphawulwe ngokweemfuno zenkqubo yemibhobho.
3.2.2 Phambi kokufakela, khangela ngononophelo ipaseji yevalvu kunye nokutywina ubuso.Ukuba kukho naluphi na ukungcola, lucoce kakuhle.
3.2.3 Phambi kofakelo, qinisekisa ukuba zonke iibholithi zibotshelelwe ngokuqinileyo.
3.2.4 Phambi kofakelo, qinisekisa ukuba ukupakisha kuxinaniswe ngokuqinileyo.Nangona kunjalo, intshukumo ye-valve stem akufanele iphazamiseke.
3.2.5 Indawo yofakelo lwevalvu kufuneka iququzelele ukuhlolwa nokusebenza.Indawo ekhethwayo kufuneka ibe yeyokuba umbhobho uthe tyaba, ivili lesandla lingasentla, kunye nesiqu sevalve sime nkqo.
3.2.6 Kwivalve eqhele ukuvaleka, ayifanelekanga ukuyifakela kwindawo apho uxinzelelo lokusebenza lukhulu kakhulu ukuthintela ukonakala kwesikhondo sevalvu.
3.2.7 Iivalvu ezidityanisiweyo zeesokethi ziya kuthi ubuncinane zifezekise ezi mfuno zilandelayo xa zidityanisiwe ukuze zifakelelwe kwisixokelelwano semibhobho kwisiza:
1) I-Welding kufuneka iqhutywe ngumshiseli onesatifikethi sesiqinisekiso se-welder esivunywe yi-State Boiler kunye ne-Pressure Vessel Authority;okanye umtyibilikisi ofumene isatifikethi sesiqinisekiso somtshisi esichazwe kwi-ASME Vol.Ⅸ.
I-2) Iiparamitha zenkqubo ye-welding kufuneka zikhethwe njengoko zichazwe kwincwadana yokuqinisekisa umgangatho wezinto eziphathekayo.
I-3) Ukwakhiwa kweekhemikhali, ukusebenza komatshini kunye nokuxhatshazwa kwe-corrosion ye-filler metal ye-welding seam kufuneka ihambelane nesiseko sesinyithi.
3.2.8 Ivalve iqhele ukufakwa, uxinzelelo olukhulu ngenxa yezixhasi, izincedisi kunye nemibhobho kufuneka iphetshwe.
3.2.9 Emva kokufakwa, ngexesha lovavanyo loxinzelelo lwenkqubo yombhobho, i-valve kufuneka ivulwe ngokupheleleyo.
3.2.10 Indawo yokuGqibela: ukuba umbhobho unamandla awoneleyo okuthwala ubunzima bevalve kunye netorque yokusebenza, akukho ndawo yokuchasa iyafuneka, kungenjalo ivalve kufuneka ibe nendawo yokuza.
3.2.11 Ukuphakamisa: musa ukusebenzisa ivili lesandla ukunyusa kunye nevalve yokunyusa.
3.3 Ukusebenza kunye nokusetyenziswa
3.3.1 Ngexesha lenkonzo, isango levalvu kufuneka livulwe ngokupheleleyo okanye livalwe ngokupheleleyo ukuthintela ukonakala komphezulu weringi yesitulo kunye nesango levalvu ngenxa yesantya esiphezulu.Ayinakusetyenziselwa ukulungisa umthamo wokuhamba.
3.3.2 Xa uvula okanye uvala ivalve, sebenzisa ivili lesandla endaweni ye-axiliary lever okanye usebenzise esinye isixhobo.
3.3.3 Kwiqondo lokushisa elisebenzayo, qinisekisa ukuba uxinzelelo olukhawulezileyo lube ngaphantsi kwe-1.1 amaxesha oxinzelelo olusebenzayo loxinzelelo-ubushushu bemilinganiselo kwi-ASME B16.34.
3.3.4 Izixhobo zokuhlangula zokhuseleko kufuneka zifakwe kumbhobho ukunqanda uxinzelelo olusebenzayo lwevalvu kwiqondo lobushushu elisebenzayo ukuba ligqithise kuxinzelelo oluphezulu oluvumelekileyo.
3.3.5 Ukubetha kunye nokothusa ivalve akuvumelekanga ngexesha lokuthuthwa, ukufakela kunye nexesha lokusebenza.
3.3.6 Ukubola kolwelo olungazinzanga, umzekelo, ukubola kwamanzi athile kunokubangela ukwanda komthamo kwaye kukhokelela ekunyukeni koxinzelelo olusebenzayo, ngaloo ndlela kuyonakalisa ivalve kwaye kubangele i-permeation, ngoko ke, sebenzisa izixhobo ezifanelekileyo zokulinganisa ukuphelisa okanye ukunciphisa izinto ezinokubangela ukubola. yolwelo.
3.3.7 Ukuba ulwelo luyicondensate, oku kuya kuchaphazela ukusebenza kwevalvu, sebenzisa izixhobo ezifanelekileyo zokulinganisa ukunciphisa ubushushu bolwelo (umzekelo, ukuqinisekisa ubushushu obufanelekileyo bolwelo) okanye endaweni yalo ufake olunye uhlobo lwesivalo.
3.3.8 Ulwelo oluzitshisayo, sebenzisa izixhobo zokulinganisa ezifanelekileyo ukuqinisekisa ukuba indawo engqongileyo kunye noxinzelelo lokusebenza aludluli kwindawo yalo yokuzitshisa (ingakumbi qaphela ukukhanya kwelanga okanye umlilo wangaphandle).
3.3.9 Kwimeko yolwelo oluyingozi, olufana noqhushumbo, olunokutsha.I-Toxic, iimveliso ze-oxidation, akuvumelekanga ukubuyisela ukupakisha phantsi koxinzelelo (nangona i-valve inomsebenzi onjalo).
3.3.10 Qinisekisa ukuba ulwelo alungcolanga, oluchaphazela ukusebenza kwevalvu, aluqulathanga izinto eziqinileyo, kungenjalo izixhobo ezifanelekileyo zokulinganisa kufuneka zisetyenziswe ukususa ubumdaka kunye nezinto eziqinileyo eziqinileyo, okanye endaweni yazo kufakwe olunye uhlobo lwesivalo.

3.3.11 Ubushushu obuvumelekileyo bokusebenza: