Kev teeb tsa, kev ua haujlwm thiab kev saib xyuas ntawm ASME Pob Valve

1. Scope

Phau ntawv no suav nrog hluav taws xob ua haujlwm, pneumatic ua haujlwm, hydraulic ua haujlwm thiab roj-gas ua haujlwm flanged kev twb kev txuas peb-thooj forged trunnion pob li qub thiab tag nrho welded pob li qub nrog nominal loj NPS 8 ~ 36 & Chav Kawm 300 ~ 2500.

2. Cov khoom piav qhia

2.1 Kev cai lij choj

2.1.1 Tsim thiab tsim qauv: API 6D, ASME B16.34

2.1.2 Xaus mus rau qhov kawg kev sib txuas tus qauv: ASME B16.5

2.1.3 Lub ntsej muag rau lub ntsej muag dimension tus qauv: ASME B16.10

2.1.4 Cov qib siab-kub tus qauv: ASME B16.34

2.1.5 Kev tshuaj xyuas thiab kev sim (nrog rau kev kuaj hydraulic): API 6D

2.1.6 Kev ntsuas hluav taws kub: API 607

2.1.7 Sulfur resistance processing thiab tshuaj xyuas cov khoom (muaj feem xyuam rau kev pabcuam qaub): NACE MR0175 / ISO 15156

2.1.8 Fugitive emission test (tseem siv tau rau kev pabcuam qaub): raws li BS EN ISO 15848-2 Chav B.

2.2 Cov qauv ntawm pob valve

Daim duab 1 Peb daim forged trunnion pob li qub nrog hluav taws xob actuated

Daim duab 2 Peb daim forged trunnion pob li qub nrog pneumatic actuated

Daim duab 3 Peb daim forged trunnion pob li qub nrog hydraulic actuated

Daim duab 4 Siab welded pob li qub nrog pneumatic actuated

Daim duab 5 faus tag nrho welded pob li qub nrog cov roj-gas actuated

Daim duab 6 Tag nrho cov welded pob li qub nrog roj-gas actuated

3. Kev teeb tsa

3.1 Pre-installation npaj

(1) Ob lub kav dej kawg ntawm lub valve tau npaj txhij. Pem hauv ntej thiab nram qab ntawm lub raj xa dej yuav tsum yog coaxial, ob lub flange sealing nto yuav tsum sib npaug.

(2) Cov kav dej huv huv, cov av nkos, vuam slag, thiab tag nrho lwm cov impurities yuav tsum raug tshem tawm.

(3) Txheeb xyuas cov cim ntawm lub pob valve kom paub cov pob li qub nyob rau hauv qhov zoo. Lub valve yuav tsum qhib tag nrho thiab kaw kom paub meej tias nws ua haujlwm zoo.

(4) Tshem tawm cov khoom siv tiv thaiv hauv kev sib txuas ntawm ob qhov kawg ntawm lub valve.

(5) Tshawb xyuas lub valve qhib thiab ntxuav kom huv si. Cov teeb meem txawv teb chaws ntawm lub rooj zaum / lub rooj zaum lub nplhaib thiab lub pob, txawm tias tsuas yog ib qho granule tuaj yeem ua rau lub ntsej muag lub ntsej muag lub ntsej muag.

(6) Ua ntej kev teeb tsa, ua tib zoo xyuas daim ntawv teev npe kom paub meej tias hom valve, qhov loj me, cov khoom siv lub rooj zaum thiab qib siab-kub yog haum rau cov xwm txheej ntawm cov kav dej.

(7) Ua ntej kev teeb tsa, xyuas tag nrho cov bolts thiab cov txiv ntoo hauv kev sib txuas ntawm lub valve kom lav nws nruj.

(8) Kev ceev ceev hauv kev thauj mus los, tsis pub pov tseg lossis tso tseg.

3.2 Kev teeb tsa

(1) Lub valve ntsia tau rau hauv cov kav dej. Rau kev tshaj tawm kev xav tau ntawm lub valve, paub meej tias cov dej ntws thiab cov dej ntws tawm raws li cov kev taw qhia ntawm lub valve yuav tsum tau nruab.

(2) Nruab nrab ntawm lub valve flange thiab pipeline flange yuav tsum tau ntsia lub gaskets raws li qhov xav tau ntawm cov kav dej tsim.

(3) Flange bolts yuav tsum sib npaug, ua tiav, sib npaug

(4) Lub pob tw welded txuas li qub yuav tsum tsawg kawg ua tau raws li cov cai hauv qab no thaum lawv tau welded rau kev teeb tsa hauv cov kav dej ntawm qhov chaw:

a. Vuam yuav tsum tau ua los ntawm welder uas muaj welder daim ntawv pov thawj tsim nyog tau pom zoo los ntawm Lub Xeev Boiler thiab Pressure Vessel Authority; los yog tus welder uas tau txais welder daim ntawv pov thawj tsim nyog tau teev tseg hauv ASME Vol. Ⅸ.

b. Cov txheej txheem vuam yuav tsum raug xaiv raws li tau teev tseg hauv daim ntawv pov thawj zoo ntawm cov khoom siv vuam

c. Cov tshuaj muaj pes tsawg leeg, txhua yam kev ua tau zoo thiab kev tiv thaiv corrosion ntawm cov khoom siv hlau ntawm vuam seam yuav tsum tau sib xws nrog cov hlau puag.

(5) Thaum nqa nrog lub log lossis lub caj dab valve thiab cov hlua khi hlua khi ntawm tes log, lub thawv iav lossis lwm yam actuators tsis raug tso cai .Tsis tas li ntawd, kev sib txuas kawg ntawm li qub yuav tsum tau xyuam xim los tiv thaiv kev puas tsuaj.

(6) Lub cev ntawm lub welded pob valve yog los ntawm lub pob tw kawg weld 3 "ntawm txhua qhov chaw nyob sab nraud ntawm qhov cua sov yuav tsum tsis pub tshaj 200 ℃. Ua ntej vuam, kev ntsuas yuav tsum tau coj los tiv thaiv impurities xws li vuam slag nyob rau hauv tus txheej txheem ntawm kev poob rau hauv lub cev channel los yog lub rooj zaum sealing. Lub raj xa dej xa mus rau qhov nruab nrab rhiab heev corrosion yuav tsum tau coj los ntsuas qhov hardness weld. Lub hardness ntawm vuam seam thiab cov ntaub ntawv hauv paus tsis ntau tshaj HRC22.

(7) Thaum txhim kho li qub thiab cov actuators, lub axis ntawm actuator cab yuav tsum yog perpendicular mus rau axis ntawm cov kav dej.

3.3 Kev tshuaj xyuas tom qab kev teeb tsa

(1) Qhov qhib thiab kaw 3 ~ 5 zaug rau lub pob li qub thiab cov actuators yuav tsum tsis txhob thaiv thiab nws lees paub tias cov li qub tuaj yeem ua haujlwm ib txwm.

(2) Lub ntsej muag kev sib txuas ntawm flange ntawm cov raj xa dej thiab lub pob valve yuav tsum tau kuaj xyuas qhov kev sib khi ua haujlwm raws li qhov yuav tsum tau ua ntawm kev tsim cov raj xa dej.

(3) Tom qab kev teeb tsa, kev ntsuas siab ntawm lub kaw lus lossis cov kav dej, lub valve yuav tsum nyob rau hauv txoj haujlwm qhib tag nrho.

4 .Kev khiav hauj lwm, cia thiab tu

4.1 Pob valve yog 90 ° qhib thiab kaw hom, pob valve tsuas yog siv rau kev hloov pauv thiab tsis siv los kho! Nws tsis raug tso cai tias lub valve siv nyob rau saum toj no kub thiab siab ciam teb thiab nquag hloov siab, kub thiab kev ua haujlwm ntawm kev siv. Qib siab-kub yuav tsum ua raws li ASME B16.34 Standard. Cov bolts yuav tsum tau muab nruj dua yog tias muaj dej ntws ntawm qhov kub thiab txias. Tsis txhob tso cai rau kev cuam tshuam kev thauj khoom thiab qhov tshwm sim rau kev ntxhov siab tsis tso cai tshwm sim ntawm qhov kub thiab txias. Cov neeg tsim khoom tsis muaj lub luag haujlwm yog tias muaj xwm txheej tshwm sim vim yog kev ua txhaum cai.

4.2 Tus neeg siv yuav tsum tau sau cov roj lubricating (greasy) tsis tu ncua yog tias muaj cov roj li qub uas yog hom roj. Lub sij hawm yuav tsum tau teem los ntawm tus neeg siv raws li qhov zaus ntawm lub valve qhib, feem ntau ib zaug txhua peb lub hlis; Yog hais tias muaj cov roj li qub uas yog hom foob, cov roj sealing lossis cov ntim mos yuav tsum tau ntim raws sij hawm yog tias cov neeg siv pom cov pa tawm, thiab nws ua kom tsis txhob muaj qhov to. Cov neeg siv ib txwm saib xyuas cov cuab yeej zoo! Yog tias muaj qee qhov teeb meem zoo thaum lub sijhawm lav (raws li daim ntawv cog lus), cov chaw tsim khoom yuav tsum mus rau qhov chaw tam sim ntawd thiab daws qhov teeb meem. Yog tias ntau tshaj lub sijhawm lav (raws li daim ntawv cog lus), ib zaug tus neeg siv xav tau peb los daws qhov teeb meem, peb yuav mus rau qhov chaw tam sim ntawd thiab daws qhov teeb meem.

4.3 Lub clockwise kev sib hloov ntawm phau ntawv tuav li qub yuav tsum raug kaw thiab lub counterclockwise kev sib hloov ntawm phau ntawv li qub yuav tsum qhib. Thaum lwm txoj hauv kev, lub thawv tswj khawm thiab cov lus qhia yuav tsum ua raws li cov kev hloov ntawm cov li qub. Thiab zam kev ua haujlwm tsis raug yuav zam kom tshwm sim. Cov neeg tsim khoom tsis muaj lub luag haujlwm vim kev ua haujlwm yuam kev.

4.4 Cov li qub yuav tsum tau saib xyuas tsis tu ncua tom qab siv cov li qub. Lub ntsej muag sealing thiabpuasyuav tsum tau kuaj xyuas ntau zaus, xws li yog tias cov khoom ntim yog laus lossis tsis ua haujlwm; yog hais tias lub cev tshwm sim corrosion. Yog tias qhov xwm txheej saum toj no tshwm sim, nws yog lub sijhawm los kho lossis hloov.

4.5 Yog hais tias qhov nruab nrab yog dej los yog roj, nws tau pom zoo tias cov valve yuav tsum tau kuaj xyuas thiab tswj xyuas txhua peb lub hlis. Thiab yog tias qhov nruab nrab yog corrosive, nws tau hais tias tag nrho cov li qub los yog ib feem ntawm cov li qub yuav tsum tau kuaj xyuas thiab tswj xyuas txhua lub hlis.

4.6 Pob valve feem ntau tsis muaj thermal rwb thaiv tsev qauv. Thaum qhov nruab nrab kub los yog kub tsawg, qhov saum npoo ntawm lub valve tsis raug tso cai kov kom tsis txhob kub hnyiab lossis frostbite.

4.7 Qhov saum npoo ntawm li qub thiab qia thiab lwm qhov chaw npog yooj yim plua plav, roj thiab cov kab mob nruab nrab. Thiab lub valve yuav tsum yog abrasion thiab corrosion yooj yim; txawm tias nws yog tshwm sim los ntawm kev sib txhuam kub ua rau muaj kev pheej hmoo ntawm cov pa roj. Yog li ntawd, lub valve yuav tsum nquag ntxuav kom ntseeg tau tias kev ua haujlwm zoo.

4.8 Thaum kho thiab kho lub valve, tib yam li qhov loj me thiab cov khoom siv o-rings, gaskets, bolts thiab ceev yuav tsum tau siv. O-rings thiab gaskets ntawm li qub tuaj yeem siv los kho thiab tu cov khoom seem hauv kev yuav khoom.

4.9 Nws yog txwv tsis pub tshem tawm cov phaj sib txuas los hloov cov bolts, txiv ntseej thiab o-rings thaum lub valve nyob rau hauv lub siab. Tom qab cov ntsia hlau, bolts, txiv ntseej lossis o-rings, cov li qub tuaj yeem rov siv tau tom qab kev sib khi.
4.10 Feem ntau, cov khoom sab hauv ntawm cov li qub yuav tsum nyiam los kho thiab hloov, nws yog qhov zoo tshaj plaws los siv cov chaw tsim khoom los hloov.

4.11 Cov li qub yuav tsum tau sib sau ua ke thiab kho tom qab kho li qub. Thiab lawv yuav tsum tau sim tom qab lawv tau sib sau ua ke.

4.12 Nws tsis pom zoo kom cov neeg siv kho lub siab valve. Yog hais tias lub siab tswj qhov chaw tau siv rau lub sijhawm ntev, thiab qhov kev sib tsoo yuav tshwm sim, txawm tias nws cuam tshuam rau cov neeg siv kev ruaj ntseg. Cov neeg siv yuav tsum hloov lub valve tshiab raws sijhawm.

4.13 Qhov chaw vuam rau vuam li qub ntawm cov kav dej yog txwv tsis pub kho.

4.14 Lub valve ntawm lub raj xa dej tsis tso cai rau kais; nws tsuas yog taug kev thiab raws li tej yam hnyav ntawm nws.

4.15 Qhov kawg yuav tsum tau npog nrog cov ntaub thaiv npog nyob rau hauv qhuav thiab ventilated chav tsev, kom ntseeg tau tias pureness ntawm valve kab noj hniav.

4.16 Loj li qub yuav tsum tau propped thiab tsis tuaj yeem tiv tauj nrog av thaum lawv khaws cia rau sab nraum zoov Tsis tas li ntawd, yuav tsum tau pom tias cov dej tsis muaj dej tsis zoo.

4.17 Thaum lub valve rau lub sijhawm ntev rov qab siv dua, cov ntim khoom yuav tsum tau kuaj xyuas seb nws puas siv tsis tau thiab sau cov roj nplua nyeem rau hauv cov khoom sib hloov.

4.18 Cov kev ua haujlwm ntawm lub valve yuav tsum ua kom huv si, vim tias nws tuaj yeem ua haujlwm ntev.

4.19 Lub valve rau lub sijhawm ntev yuav tsum tau kuaj xyuas tsis tu ncua thiab tshem tawm cov av. Lub sealing nto yuav tsum tau them sai sai kom huv si kom tsis txhob muaj kev puas tsuaj.

4.20 Cov ntim khoom qub yog khaws cia; qhov chaw ntawm li qub, qia ncej thiab flange lub sealing nto ntawm flange yuav tsum tau them sai sai rau kev tiv thaiv.

4.21 Cov kab noj hniav ntawm cov li qub tsis raug tso cai kom ntws tawm thaum qhib thiab kaw tsis ncav cuag txoj haujlwm.

5. Cov teeb meem uas tshwm sim, ua rau thiab kev kho mob (saib daim ntawv 1)

Daim Ntawv 1 Cov teeb meem tshwm sim, ua rau thiab kev ntsuas kho

Lus Cim: Tus neeg pabcuam yuav tsum muaj kev paub txog thiab kev paub txog li qub