Intshayelelo: Kutheni i-API 598 Ibalulekile
Ukuthembeka kweevalvu kwindawo enye ongenakuyithintela Nokuba usebenza ngeoyile, igesi okanye iikhemikhali zepetroli, iimfuno zoshishino zezona mfuno ziphezulu zeevalvu zakho.Uvavanyo lweValve ye-API 598kwaye Uvavanyo ngumgangatho oqhelekileyo weshishini lokumisela ubulungisa besakhiwo sevalvu kunye nomda woxinzelelo kunye nokumisela amandla evalvu okuthobela izinga lokuvuza elivumelekileyo lekhowudi. Olu lwazi lumisela iikhrayitheriya ezihambelanayo zokuba abaHloli bamisele umgangatho, kunye nenkqubo yokuqalisa ukuvavanywa kwakhona (okanye ezinye izenzo zokulungisa) xa iimpawu zikrokrelwa.
Yintoni i-API 598
Ipapashwe yi-I-American Petroleum Institute (API), I-API 598 icacisa uhlolo oluyimfuneko lwangaphambi kokuthunyelwa kunye neenkqubo zovavanyo loxinzelelo kwiivalvu zesinyithi ezisetyenziswa kumashishini e-hydrocarbon.
Iinjongo eziphambili
• Qinisekisa amandla olwakhiwo (ukubamba uxinzelelo)
• Ukuqinisekiswa kokusebenza kokutywina (ukuvuza kwangaphakathi/kwangaphandle)
• Ukumisela imigaqo yokwamkelwa kwihlabathi liphela
Ukubaluleka Okubalulekileyo
• Kubahloli: Ibonelela ngeendlela zovavanyo ezinokunyanzeliswa
• Kubathengi: Lusisiseko seemfuno zokuthenga kunye nokuthobela umthetho
Iinkqubo zoVavanyo lwe-API 598: Ukuthobela iNyathelo ngeNyathelo
1. Ububanzi kunye neMigangatho ebhekiselelweyo
Iinkcukacha zeeValve zeSango leNtsimbi, iiFlanged okanye iiButt Welding Ends, iiBolted Bonnets. 34, njl.njl.).
2. Iimfuno zoHlolo
• Uxanduva: Ikhokelwa ngumvelisi
• Uvavanyo oluPhambili:
→ Isiqinisekiso sezinto ezibonakalayo
→ Ukuchaneka kobukhulu
→ I-NDT (i-RT/UT/MT/PT ukuya kwi-A519M)
→ Iziphene ezibonakalayo
→ Ukuthobela uphawu/uphawu lwegama
→ Ukuthembeka kokwaleka
3. Uvavanyo loxinzelelo (Icandelo elibalulekileyo)
Iintlobo zoVavanyo kunye neenkqubo
| Uhlobo lovavanyo | Injongo | Imeko yeValve | Phakathi | Uxinzelelo | Ubude (umzuzu) |
|---|---|---|---|---|---|
| Uvavanyo lweShell | Umzimba/Ibhonethi | Ivuliwe | Amanzi | 1.5x MAWP @ 38°C (100°F) | ≥NPS 2: 60s |
| Uvavanyo lweSitulo sangasemva | Itywina leBonnet yeStem yangasemva (Ukuba isetyenzisiwe) | Ivuliwe | Amanzi/Igesi (Ephantsi) | 1.1x MAWP @ 38°C (100°F) | = Uvavanyo lweShell |
| Uvavanyo lweSihlalo soxinzelelo oluphezulu | Ukuvalwa kokutywina okuPhambili | Ivaliwe | Amanzi (iivalvu zolwelo) | 1.1x MAWP @ 38°C (100°F) | I-NPS 4+: 60s |
| Uvavanyo lweSihlalo soxinzelelo oluphantsi | Ukuqinisekiswa kokutywinwa kwegesi | Ivaliwe | Umoya/iNitrogen | 0.5–0.7 MPa (ibha eyi-6–8) | = Uxinzelelo oluphezulu |
| Uvavanyo lweDBB | Umsebenzi wokuzahlula kabini kunye nokopha | Ivaliwe | Amanzi/iGesi | Uvavanyo Ngesihlalo Ngasinye | Uvavanyo Ngesihlalo Ngasinye |
Ubude boXinzelelo loVavanyo olufunekayo – Ukusuka kwi-API 598 Itheyibhile 4
Iikhrayitheriya zoKwamkelwa kokuvuza
• Uvavanyo lweShell/Backseat: Akukho kuvuza kubonakalayo
• Uvavanyo lolwelo olunoxinzelelo oluphezulu (Isihlalo sesinyithi): Akukho mathontsi abonakalayo
• Amanqanaba eebhamu zovavanyo lwegesi (kwiibhamu ngomzuzu):
| Uhlobo lweValve | Ubungakanani (i-NPS) | Amaqamza aphezulu/umzuzu |
|---|---|---|
| Isango/Iglobhu/Ibhola | ≤2.5 | 0 |
| 3–6 | 12 | |
| ≥8 | 20 | |
| Ibhabhathane (Isinyithi) | ≤2.5 | 0 |
| 3–6 | 24 | |
| ≥8 | 40 | |
| Zonke Izihlalo Ezithambileyo | Nasiphi na | 0 |
Ingxelo yeSampulu yoVavanyo loXinzelelo lweValve
4. Ukuphathwa Emva kovavanyo
Ukomisa okunyanzelekileyo (kubalulekile kwintsimbi engagqwaliyo) kunye nokugcinwa kwakhona.
5. Isiqinisekiso
Iivalvu zokuthobela imithetho ziza ne-API monogram (ukuba kuyimfuneko) kunye neengxelo zovavanyo.
Iivalvu ezigutyungelwe yi-API 598
Kwiivalvu zesinyithi ezenziwe ngomatshini:
√I-API 6DIivalvu zoMbhobho woMgca (Ibhola/Isango/Iplagi/Ukujonga)
√I-API 6A: Iivalvu zeWellhead
√I-API 600/602/603: Iivalvu zeSango leNsimbi
√I-API 608Iivalvu zeBhola zeMetal
√I-API 609Iivalvu zebhabhathane
√I-API 623: Iivalvu zeGlobe zeNtsimbi
Ingongoma ephambili:I-API 598 ngumgangatho wovavanyo. Uyilo/izixhobo zeevalvu zichazwe ngokwemigangatho yemveliso (i-API 6D kunye nezinye). Izivumelwano mazibhekisele kuzo ZIBINI.
Isikhokelo Esisebenzayo Kwiingcali
Kwabahloli
1. Imigangatho yemveliso yamva nje ye-API 598 echongiweyo.
2. Ngekota, Ngaphambi kokuba uvavanyo lwenziwe, linganisa izixhobo zovavanyo (iigeyiji, njl.njl.>).
3. Ukubalwa kwamaqamza amaxwebhu/ukuvuza kweefoto
4. Qinisekisa ukhuseleko ngexesha lovavanyo lwegesi
Kwamaqela okuthenga
1. Faka kwiikhontrakthi: Thembela kuVavanyo loKwamkelwa kweFactory olufunyenwe lungqina (i-FAT)
• “Iivalufa eziza kuvavanywa ngokwe-API 598, i-11th Ed (yamva nje)”
• Iinkcukacha zemveliso ezisebenzayo (umz., i-API 6D 25th Ed.)
2. Funa iingxelo zovavanyo ezisayiniweyo zokuqala
3. Faka iimfuno ezongezelelweyo:
• Uvavanyo lomlilo (API 607/6FA)
• Ukukhutshwa kwezinto ezikhutshwayo ezibalekayo (ISO 15848)
Isiphelo: Umgangatho oBalulekileyo
I-API 598 ayisiyonto iqhelekileyo nje kuphela—ngumgca wakho wokuqala wokuzikhusela kwiingxaki ezibandakanya iivalvu. Kubahloli, yincwadi yokudlala ecacileyo. Kwizinto ezithengwayo, ukunciphisa umngcipheko kuyavela. Kwiimeko ezinzima ngakumbi zenkonzo, ukunamathela ngokungqongqo kwi-API 598 akuyonto ikhethwayo—amashishini ayifuna ngokhuseleko, uxanduva lokusingqongileyo, kunye nokuthembeka.
Ixesha leposi: Julayi-22-2025