API 641 vs. ISO 15848-1: Phau Ntawv Qhia Xaiv Lub Pob Valve Uas Muaj Pa Pa Tsawg

Cov Lus Qhia Sai: Qhov txawv tseem ceeb ntawm API 641 thiab ISO 15848-1 yog dab tsi?

API 641 yog tus qauv Asmeskas uas nruj heev uas tsim tshwj xeeb rau cov li qub uas tig ib feem plaub ntawm lub valve siv methane (CH₄), tiv thaiv kev xau ntawm ≤ 100 PPMv yam tsis pub hloov kho gland packing. ISO 15848-1 yog ib qho kev faib tawm thoob ntiaj teb uas hloov tau yooj yim (Chav Kawm A, B, C) siv methane lossis helium, uas ua raws li cov theem kev ua haujlwm ntev (2,500 txog 10,000+ lub voj voog) thiab tso cai rau kev hloov kho packing.

1. Kev Taw Qhia: Kev Sib Ntaus Sib Tua Nrog Cov Pa Hluav Taws Xob Uas Khiav Dim

Hauv cov chaw ua roj av niaj hnub no thiab cov chaw ua tshuaj lom neeg, cov pob valve stem thiab cov pob qij txha ntawm lub cev muaj txog li 60% ntawm tag nrho cov pa phem volatile organic compound (VOC). Tshaj li kev ua raws li ib puag ncig - xws li US EPA Txoj Kev 21 kev pom zoo lossis European REACH cov lus qhia - kev xau ntawm cov qia tsis raug tswj hwm ua rau muaj kev pheej hmoo loj heev rau kev nyab xeeb, ua rau cov khoom poob sai dua, thiab ua rau cov ntawv tso cai ua haujlwm ntawm cov chaw muaj kev phom sij. Lub Koom Haum Zog Thoob Ntiaj Teb kwv yees tias 30% ntawm tag nrho cov pa phem methane los ntawm kev ua haujlwm roj thiab roj av los ntawm cov khoom siv xau suav nrog cov valve.

Thaum cov tuam txhab tsim khoom thiab kev tsim kho (EPC) lossis cov pab pawg saib xyuas cog qoob loo teev cov khoom siv qis-emission (Low-E) quarter-turn ball valves, lawv ntsib ob tus qauv xeem hom thoob ntiaj teb tseem ceeb: API 641 thiab ISO 15848-1.

Kev xaiv tus qauv tsis raug lossis kev txhais cov kev faib tawm kev sim tsis raug tuaj yeem ua rau cov khoom xa tuaj tsis raug, kev tshuaj xyuas EPA hauv thaj chaw tsis ua tiav, lossis cov nqi ntau dhau tsis tsim nyog. Hauv phau ntawv qhia no, peb siv peb cov kev paub txog kev tsim kho nrog cov haujlwm valve low-E uas tau ntawv pov thawj los ntawm cov neeg thib peb los rhuav tshem cov qhov sib txawv tseem ceeb, cov txheej txheem sim, thiab cov qauv ntawm cov qia uas xav tau los ua kom tau raws li qhov xau.

2. API 641 piv rau ISO 15848-1: Kev Sib Piv Sai

Txawm hais tias ob qho qauv ntsuas qhov xau ntawm lub valve hla lub voj voog kho tshuab thiab thermal, lawv cov kev xav sib txawv. API 641 yog tus qauv Asmeskas ruaj khov, dhau / tsis ua tiav uas tsim los rau cov valves ib nrab tig hauv roj thiab roj av. ISO 15848-1 yog ib qho kev faib tawm thoob ntiaj teb uas hloov pauv tau yooj yim, ntau theem siv kev ua siab ntev, nruj, thiab chav kawm kub.

3. Daim Ntawv Pov Thawj API 641: Cov Kev Ntsuas thiab Cov Kev Cai

Tsim los ntawm American Petroleum Institute, API 641 ("Hom Kev Ntsuas ntawm Quarter-Turn Valves rau Fugitive Emissions") tau tsim tshwj xeeb los tshem tawm kev siv tsis raug ntawm keeb kwm yav dhau los ntawm ntau-tig cov qauv (xws li API 624) ntawm quarter-turn ball valves. Tus qauv tau muab thawj zaug thaum Lub Kaum Hli 2016 thiab txij li ntawd los tau hloov kho rau xyoo 2023.

Cov Qauv Ntsuas Tseem Ceeb API 641:

1. Cov Roj Uas Xav Tau:Cov pa roj methane (CH₄) ntawm qhov siab sim ntawm 100 psig yam tsawg kawg nkaus thiab 600 psig siab tshaj plaws.
2. Kev Caij Tsheb Kauj Vab Thermal & Mechanical:Qhov kev sim no ua rau lub valve raug rau 610 lub voj voog kho tshuab sib xyaw nrog 3 lub voj voog thermal los ntawm qhov kub thiab txias txog li 260 ° C (500 ° F).
3. Kev Hloov Kho Tsis Pub Tshaj:Lub chaw kuaj mob tsis tuaj yeem ua kom cov ntsia hlau ntawm cov qia nruj thaum lub sijhawm kuaj. Yog tias qhov xau tshaj 100 PPMv ntawm txhua lub sijhawm, qhov kev tsim qauv yuav ua tsis tiav.
4. Yuav tsum tau ua API 622 Stem Packing:Yuav kom tau daim ntawv pov thawj API 641, cov khoom siv ntim khoom ntawm lub valve yuav tsum tau dhau API 622 ua ntej (kev kuaj cov khoom ntim khoom huv rau kev tso pa tawm, kev xeb, thiab kev puas tsuaj ntawm cov cua sov).

4. ISO 15848-1 Kev Faib Tawm: Cov Chav Kawm A, B, C thiab CO1–CO3 Piav Qhia

ISO 15848-1 tau teev tseg dav dav thoob plaws hauv European, Es Xias, thiab Middle Eastern petrochemical projects. Dua li ntawm ib txoj kab dhau/tsis ua tiav, ISO 15848-1 tso cai rau cov neeg siv kawg teev cov lej faib tawm raws li cov kev cai ua haujlwm:

Hom Ntawv Qhia Txog Kev Faib Pawg:ISO 15848-1 [Chav Kawm Ruaj Khoov] – [Chav Kawm Ua Siab Ntev] – [Chav Kawm Kub] – [Cov Khoom Siv Ntsuas]

1. Cov Chav Kawm Nruj (Cov Kev Txwv ntawm Kev Xaim)

• Chav Kawm A(≤ 10⁻⁶ mg·s⁻¹·m⁻¹ qhov ntev ntawm lub qia): Chav kawm nruj tshaj plaws, xav tau rau cov kev pabcuam lom (benzene, H₂S, HF). Chav Kawm A cov qhov dej xau tsawg dua 10 ppm methane sib npaug.
• Chav Kawm B(≤ 10⁻⁴ mg·s⁻¹·m⁻¹ qhov ntev ntawm lub qia): Tus qauv ntsuas rau cov khoom siv tshuaj lom neeg zoo. Rau kev sim methane, BM ≤ 100 ppm; rau helium, BH ≤ 1.0 × 10⁻⁴ mg/(s·m).
• Chav Kawm C(≤ 10⁻² mg·s⁻¹·m⁻¹ perimeter): Qhov ntsuas qis tshaj plaws hauv kev lag luam. Rau methane, CM ≤ 500 ppm.

2. Cov Chav Kawm Ua Siab Ntev (Kev Sib Tw Kho Tshuab ntawm Lub Voj Voog Rho Tawm)

• CO1:2,500 Lub Voj Voog (Kev tsim nyog rau lub pob valve ib feem plaub ntawm lub voj voog)
• CO2:5,000 Lub Voj Voog
• CO3:10,000 Lub Voj Voog

5. Kev Tsim Kho Low-E Ball Valves: Stem Packing Architecture

Kev ua tiav qhov ua raws li qhov tso pa tawm ≤ 100 PPMv tsis tuaj yeem ua tiav los ntawm kev siv lub zog ntau dhau ntawm cov ntsia hlau gland. Lub zog ntau dhau ua rau lub zog ua haujlwm siab, lub rooj zaum puas tsuaj, thiab kev hnav khoom ua ntej lub sijhawm. Lub pob valve uas tsim los ntawm kev tsim kho qis-emission ua kom zoo tshaj plaws rau tag nrho lub chamber sealing stem.

Cov Ntsiab Lus Tseem Ceeb ntawm Low-E Ball Valves:

1. Cov Rooj Sib Tham Caij Nplooj Ntoos Hlav Belleville uas Muaj Nyob:Cov hlau tsis xeb Belleville disc caij nplooj ntoos hlav stacks tswj tau qhov kev sib zog tas li ntawm cov khoom ntim, nws yuav them rov qab rau qhov nthuav dav thermal thiab kev so ntawm cov khoom ntim thaum lub sijhawm hloov pauv kub. Kev teeb tsa cov disc caij nplooj ntoos hlav kom zoo (series lossis parallel) yog qhov tseem ceeb los tsim kom muaj lub zog preload zoo rau txhua qhov loj me ntawm lub valve thiab chav kawm siab. Txoj hauv kev no txuas ntxiv lub sijhawm rov ntim khoom dua los ntawm 2-3 xyoos mus rau 5-10 xyoos.
2. Qhov Chaw Ua Kom Zoo Nkauj Kawg:Cov qia valve yuav tsum tau CNC zom thiab txhuam kom txog qhov roughness ntawm Ra < 0.4 µm (16 µin). Cov qia roughness ua haujlwm zoo li cov ntaub ntawv, rhuav cov graphite fibers thaum lub sijhawm tig.
3. Cov Khoom Siv Graphite Uas Ua Los Ntawm Tuag:Siv cov khoom ntim graphite uas tau ntawv pov thawj API 622 nrog cov nplhaib tiv thaiv kev rho tawm sab saud thiab hauv qab uas muaj hlau Inconel uas tau braided tiv thaiv kev hloov pauv ntawm cov pa roj carbon thaum muaj kev nyuaj siab. Cov khoom ntim API 622 uas tau kuaj los ntawm lwm tus neeg tuaj yeem ua tiav cov pa phem nruab nrab li 8 ppmv.
4. Kev kam rau siab ntawm lub thawv ntim khoom siv tshuab:Qhov sib txawv ntawm qhov ntev ntawm lub qia, phab ntsa ntawm lub thawv ntim khoom, thiab lub qog ua raws li cov qog tshem tawm qhov kev ua si ntawm sab thiab kev hnav sab.

6. Kev Kawm Txog Qhov Tseeb Hauv Lub Ntiaj Teb: Kev Txhim Kho Lub Valve Low-E Hauv Tebchaws Europe

Keeb Kwm

Ib lub tuam txhab tsim tshuaj lom neeg thoob ntiaj teb hauv Rotterdam tau ntsib ntau zaus cov lus ceeb toom txog kev ua raws li VOC emissions ntawm lub ethylene skid. Lub Hoobkas tau siv cov pob valves uas muaj PTFE-packed uas lwj sai sai hauv qab thermal cycling ntawm -20°C thiab 180°C. EPA Txoj Kev 21 kev ntsuam xyuas sniffing tau sau tseg qhov xau ntau dua 800 PPMv—yim npaug ntawm qhov txwv tso cai.

Lub chaw tsim khoom lub LDAR (Kev Tshawb Nrhiav thiab Kho Qhov Xaus) qhov kev pab cuam tau txheeb xyuas 47 qhov chaw ntawm lub valve uas xav tau kev hloov pauv tam sim ntawd kom tsis txhob raug nplua nyiaj thiab tej zaum yuav muaj kev txwv rau daim ntawv tso cai ua haujlwm.

Kev daws teeb meem & kev txhim kho engineering

Tus neeg siv khoom xav tau cov twj hloov pauv uas ua raws li ob txoj cai (API 641 thiab ISO 15848-1 Class BH-CO1). Peb pab neeg ua haujlwm engineering tau ua qhov kev tshuaj xyuas tag nrho ntawm cov kav dej rau txhua qhov loj me ntawm lub twj thiab qib siab, xam qhov Belleville spring preload uas yuav tsum tau ua kom muaj zog kaw thoob plaws -20°C txog 180°C qhov kub.

Peb tau xa cov khoom siv pob valve Class 300 uas muaj cov yam ntxwv hauv qab no:

• Cov kav hlau tsis xeb 17-4PH uas ua tiav zoo heev (Ra ≈ 0.2 µm)—ntxhib dua li qhov yuav tsum tau ua tus qauv 50%.
• Cov khoom ntim khoom Belleville dynamic uas tau ntim khoom siv API 622 uas tau ntawv pov thawj graphite—tus neeg thib peb tau txheeb xyuas ntawm qhov nruab nrab ntawm 8 ppmv.
• Precision CNC-machined lub cev sib koom ua ke kauv-qhov txhab gaskets nrog sab hauv / sab nraud tuav rings.
• 100% lub Hoobkas helium xau kev kuaj xyuas ib qho ISO 15848-2 ntawm txhua lub valve ntau lawm ua ntej xa khoom.

Cov txiaj ntsig

Kev tshuaj xyuas sab nraud uas TÜV Rheinland ua tau lees paub qhov kev xau ntawm methane tsawg dua 12 PPMv—ntau dua li qhov yuav tsum tau ua ntawm 100 PPMv thiab sawv cev rau qhov txo qis 98.5% ntawm cov qub PTFE-ntim valves.

Lub Hoobkas tau dhau txhua qhov kev tshuaj xyuas ib puag ncig yam tsis tas yuav hloov kho cov qia rau 18 lub hlis ntawm kev pabcuam txuas ntxiv. Lub sijhawm txij li kev tshuaj xyuas txhua hli mus rau kev kuaj xyuas txhua xyoo, ua rau txuag tau nyiaj ntau heev.

7. Daim Ntawv Teev Cov Khoom Siv Rau Cov Khoom Siv Low-E

Thaum soj ntsuam tus neeg muab khoom siv lub pob valve rau kev ua raws li kev tso pa tawm, peb xav kom saib xyuas plaub qhov kev tswj xyuas zoo no:

1. Txheeb xyuas Daim Ntawv Pov Thawj Xeem Hom:Thov cov ntawv qhia txog kev xeem thawj zaug uas tau muab los ntawm cov chaw kuaj mob ywj pheej uas tau lees paub (xws li TÜV, SIRA, lossis United Valve) uas qhia meej txog API 641 lossis ISO 15848-1 cov kev ntsuas. Xyuas kom daim ntawv pov thawj npog qhov loj me ntawm lub valve thiab chav kawm siab uas koj tab tom yuav - tsis txhob lees txais kev kwv yees los ntawm cov qhov me me.
2. Cov Ntaub Ntawv Txog Kev Tshawb Xyuas Cov Khoom Siv Ntim Khoom:Xyuas kom tus neeg muag khoom ntim khoom muaj cov ntawv pov thawj API 622 ywj pheej uas qhia tias poob phaus tsawg thiab cov yam ntxwv xeb tsawg.
3. Tshawb xyuas cov peev xwm ntawm lub Hoobkas kuaj:Xyuas kom meej tias tus neeg muag khoom puas muaj cov khoom siv ntsuas qhov pa roj helium thiab cov khoom siv ntsuas nplaim taws (FID) rau kev kuaj kab ntau lawm raws li ISO 15848-2.
4. Tshawb xyuas qhov ntsuas ntawm qhov chaw ntawm cov qia:Xyuas kom tseeb tias qhov tiav ntawm qhov chaw ntawm cov qia tau sau tseg thaum lub sijhawm tshuaj xyuas kev tswj hwm zoo siv cov ntsuas calibrated.

8. Cov Lus Nug Feem Ntau

9. Xaus Lus: Xaiv Tus Qauv Zoo Rau Koj Daim Ntawv Thov

Kev xaiv ntawm API 641 thiab ISO 15848-1 nyob ntawm qhov chaw nyob ntawm koj qhov project, cov cai tswjfwm, thiab cov xwm txheej ua haujlwm. Raws li peb qhov kev paub txog kev tsim kho, ntawm no yog peb cov lus qhia tseem ceeb:

• Rau cov haujlwm ua roj av thiab petrochemical hauv Tebchaws Meskas uas muaj kev saib xyuas EPA nruj heev, daim ntawv pov thawj API 641 feem ntau tsis tuaj yeem sib tham tau. Cov lus qhia "tsis muaj kev hloov kho" ua kom ntseeg tau tias tus qauv tsim valve tuaj yeem tswj tau qhov kev sib khi zoo yam tsis muaj kev cuam tshuam hauv daim teb.
• Rau cov haujlwm European thiab thoob ntiaj teb uas muaj kev xav tau kub thiab kev caij tsheb kauj vab nyuaj, ISO 15848-1 qhov kev faib tawm yooj ywm muab kev sib phim zoo dua nrog cov xwm txheej kev pabcuam tiag tiag. Txoj hauv kev sib txawv tso cai rau koj los phim qhov ntsuas kev ua haujlwm ntawm lub valve rau koj cov ntaub ntawv ua haujlwm tshwj xeeb.
• Rau cov kev pabcuam tseem ceeb lossis lom (benzene, H₂S, HF), peb xav kom teev tseg ISO 15848-1 Chav Kawm A lossis B nrog kev kuaj helium rau qhov rhiab heev tshaj plaws.
• Thaum tsis paub meej, kev teev cov li qub uas tau ntawv pov thawj ob zaug (API 641 + ISO 15848-1) muab kev pab cuam dav dav tshaj plaws thiab ua pov thawj rau koj txoj kev yuav khoom yav tom ntej los ntawm kev hloov pauv cov kev cai lij choj.

Yog xav tau cov lus qhia tshwj xeeb rau qhov project, cov ntawv qhia txog kev sim sab nraud, lossis kev sab laj txog kev siv tshuab, hu rau peb pab neeg engineering ntawmsales@nswvalves.com.