1. Tšepe ea Womic: Bokhoni ba Tlhahiso le Matla a Khamphani
Li-valve tsohle tsa heke tse nang le cryogenic li entsoe ka:
Litifikeiti tsa Boleng le ho Latela Melao:
Ho Tenyetseha ha Tlhahiso bakeng sa Li-valve tsa Heke tsa Cryogenic:
2. Valve ea Heke ea Cryogenic: Sebopeho sa Thepa le Litlhaloso tsa Senotlolo
Likarolo tsa Bohlokoa tsa Moralo bakeng sa Tšebeletso ea -196°C:
Lisebelisoa tse Ikhethileng bakeng sa Tšebeletso ea Cryogenic:
| Karolo | Dikgetho tsa Thepa | Boemo ba Thempereichara | Litšobotsi tsa Bohlokoa |
|---|---|---|---|
| 'Mele/Bonete | ASTM A352 LCB/LCC | -46°C ho isa ho +300°C | Tšepe ea carbon e mocheso o tlase |
| 'Mele/Bonete | ASTM A351 CF3/CF3M (304L/316L SS) | -196°C ho isa ho +300°C | Botsitso ba Austenitic mochesong o batang oa cryogenic |
| 'Mele/Bonete | ASTM A351 CF8/CF8M (304/316 SS) | -196°C ho isa ho +300°C | Mofuta o phahameng oa khabone |
| Keiti | ASTM A182 F304/F316 | -196°C ho isa ho +300°C | Sefahleho se thata sa Stellite |
| Mehele ea Litulo | ASTM A182 F304/F316 | -196°C ho isa ho +300°C | E thatafetse ka stellite, e ka nkeloa sebaka |
| Kutu | ASTM A182 F304L/F316L | -196°C ho isa ho +300°C | Matla a atolositsoeng mochesong o tlase |
| Kutu | ASTM A182 F XM-19 | -196°C ho isa ho +300°C | Matla a phahameng, ho roala ho phahameng |
| Sekoti sa 'Mele | Leqeba le Otlolohang (Graphite + SS) | -196°C ho isa ho +400°C | Tiiso e sireletsehileng mollong, e tšepahalang |
| Ho paka ka kutu | Graphite e Fokotsang Moroalo o Tlase | -196°C ho isa ho +400°C | Setifikeiti sa ISO 15848 |
| Ho phunya | ASTM A320 Gr.L7 / A194 Gr.7 | -46°C ho isa ho +300°C | Bakeng sa 'mele oa LCB/LCC |
| Ho phunya | ASTM A320 Gr.B8 CL.2 / A194 Gr.8 | -196°C ho isa ho +400°C | Bakeng sa 'mele oa SS |
| Hardfacing | Stellite 6 / Stellite 21 | -196°C ho isa ho +400°C | Libaka tsa ho koala liheke le litulo |
Netefatso ea Boitsebiso bo Bohlokoa:
3. Ho Latela Maemo le Litekanyetso tsa Tekanyo
| Ntho | Tlhaloso |
|---|---|
| Tekanyetso ea Moralo | BS 6364, API 600, API 6D, ASME B16.34, MSS SP-134 |
| Mofuta | Bonnet e nang le Bolte, OS&Y (Sehlopha se Phahamisang) kapa Sehlopha se sa Phahamiseng |
| Boholo ba Boholo | 1/2" – 48" (DN15 – DN1200) |
| Tekanyetso ea Khatello | Sehlopha sa 150 - Sehlopha sa 2500 (PN20 - PN420) |
| Boemo ba Thempereichara | -196°C ho isa ho +300°C (ho latela thepa) |
| Qetella Likhokahano | E nang le Flange (RF, RTJ ka ASME B16.5/B16.47), Weld ea Butt (BW ka ASME B16.25), Weld ea Socket |
| Lifahleho li talimane | ASME B16.10, API 6D |
| Ho Ntša Moroallo ka Balehi | ISO 15848-1 (Sehlopha sa A kapa sa B) |
| Ho phunya | ASME B16.34, ASTM A320/A194 |
| Teko ea Cryogenic | BS 6364, MSS SP-134 |
| Teko ea Hydrostatic | API 598 |
| Ts'ebetso | Lebili la letsoho, Thepa, Pneumatic, Motlakase |
Likarolo tsa Moralo ho latela BS 6364 le API 600:
4. Litlhophiso tse fumanehang – Valve ea Heke ea Cryogenic (-196°C)
| Boholo | Sehlopha sa Khatello | Lisebelisoa tsa 'Mele | Mofuta oa Heke | Qetella Khokahano | Ts'ebetso | Tšebeliso e Tloaelehileng |
|---|---|---|---|---|---|---|
| 1/2" – 2" | CL150-2500 | A182 F304L/F316L | Lekhapetla | SW/NPT/BW | Lebili la letsoho | Lisebelisoa, mela ea ho nka lisampole |
| 2" – 8" | CL150-2500 | A351 CF3/CF3M | Lekhapetla | Flange/BW | Lebili la letsoho/Lisebelisoa | Semela sa LNG, ho itšehla thajana ha ASU |
| 2" – 8" | CL150-600 | A352 LCB/LCC | Lekhapetla | Flange/BW | Lebili la letsoho | Liteishene tse amohelang LNG |
| 6" – 24" | CL150-900 | A351 CF3/CF3M | Wedge/Tšebelisano | Flange/BW | Lisebelisoa | Methapo e meholo ea phetisetso ea LNG |
| 6" – 24" | CL150-600 | A352 LCB/LCC | Lekhapetla | Flange/BW | Lisebelisoa | Tšebeletso ea tšepe ea khabone ea mocheso o tlase |
| 12" – 42" | CL150-300 | A351 CF3/CF3M | Selaete se Tšoanang | Flange/BW | Lisebelisoa/Motlakase | Sehokelo sa tanka ea polokelo ea LNG |
| 2" – 48" | CL150-2500 | A351 CF3M | Selaete se Tšoanang | BW feela | Lisebelisoa/Motlakase | Khatello e phahameng ea cryogenic |
Likarolo tsa Bohlokoa tsa Moralo - Heke ea Wedge (Boholo ≤ 24"):
Likarolo tsa Bohlokoa tsa Moralo - Selaete se Tšoanang (Boholo ≥ 12"):
5. Maemo a Tloaelehileng bakeng sa Li-valve tsa Heke ea Cryogenic
| E tloaelehileng | Tlhaloso | Kopo |
|---|---|---|
| BS 6364 | Tlhaloso ea li-valve tsa cryogenic bakeng sa LNG le tšebeletso ea mocheso o tlase | Tekanyetso ea mantlha ea moralo bakeng sa tšebeletso ea cryogenic |
| API 600 | Li-valve tsa heke tsa tšepe bakeng sa liindasteri tsa peterole le khase ea tlhaho | Tekanyetso ea moralo oa valve ea heke |
| API 6D | Litlhaloso tsa li-valve tsa liphaephe le liphaephe | Tekanyetso ea valve ea heke ea liphaephe |
| ASME B16.34 | Li-valve - tse flanged, tse threaded, le tse welding end | Motheo oa tekanyo ea khatello le mocheso |
| MSS SP-134 | Maemo a tloaelehileng bakeng sa li-valve bakeng sa tšebeletso ea cryogenic | Tekanyetso ea li-valve tsa cryogenic tsa US |
| ISO 15848-1 | Li-valve tsa indasteri - mekhoa ea ho lekanya le ho leka bakeng sa mesi e balehang | Setifikeiti sa tlhahiso e fokolang ea mosi o balehang |
| ASME B16.10 | Litekanyo tsa sefahleho le sefahleho le qetello | Tekanyetso ea tekanyo ea tlhomamiso |
| API 598 | Tlhahlobo le tlhahlobo ea valve | Mekhoa ea ho amohela teko |
| NACE MR0175 / ISO 15156 | Liindasteri tsa peterole le khase ea tlhaho - thepa bakeng sa tikoloho ea H2S | Ho latela melao ea litšebeletso tse mpe |
6. Ts'ebetso ea Tlhahiso - Valve ea Heke ea Cryogenic (-196°C)
Mohato oa 1: Tlhahlobo ea Lisebelisoa tse Tala le PMI
Mohato oa 2: Ho etsa mechini
Mohato oa 3: Ho Tiea ha Stellite (Ho Bohlokoa Bakeng sa ho Hanela ho Tloha)
Mohato oa 4: Kalafo ea Deep Cryogenic (E Bohlokoa bakeng sa Tšebeletso ea -196°C)
Mohato oa 5: Ho kopanya
Mohato oa 6: Tlhahlobo ea Pele ho Teko
Mohato oa 7: Teko ea Hydrostatic (Ka API 598)
Mohato oa 8: Teko ea Tshebetso ea Cryogenic (E Bohlokoa bakeng sa Tšebeletso ea -196°C ka BS 6364)
Mohato oa 9: Teko ea ho Ntša Mosi ka Balehi (Ho latela ISO 15848-1)
Mohato oa 10: Tlhahlobo ea ho Qetela le ho Tšoaea
7. Mekhoa ea Taolo le Liteko tsa Boleng bakeng sa Valve ea Heke ea Cryogenic (-196°C)
| Sethaleng | Mokhoa oa Tlhahlobo | Morero |
|---|---|---|
| Lisebelisoa tse so ntlafatsoe | PMI (Tlhaloso e Ntle ea Lintho) | Netefatsa sehlopha sa motsoako le k'hemistri |
| Lisebelisoa tse so ntlafatsoe | Teko ea Tšusumetso ea Charpy ho -196°C | Netefatsa ho tiea ha mocheso o tlase ho latela BS 6364 |
| Lisebelisoa tse so ntlafatsoe | PT/UT (Tlhahlobo ea ho Lahlela) | Lemoha liphoso tsa ho lahla, ho kenyeletsoa, le porosity |
| Kamora ho Sebetsa ka Matla ho Stellite | Teko ea ho tiea | Netefatsa boleng le thatafacing |
| Kamora ho Sebetsa ka Botebo | Tlhahlobo ea PT | Lemoha mapetso a thata kapa masoba |
| Ho etsa mechini | Tlhahlobo ea litekanyo | Netefatsa litekanyo tsa bohlokoa ka ASME B16.34 |
| Kamora Kalafo e Tebileng ea Cryogenic | Tlhahlobo-bocha ea litekanyo | Netefatsa botsitso ba tekanyo kamora kalafo |
| Kopano | Tlhahlobo ea Pono | Hlahloba tšilafalo, kopano e nepahetseng |
| Pele ho Teko | Teko ea Setulo sa Pneumatic (Khatello e Tlase) | Netefatsa botšepehi ba tiiso ea pele |
| Valve e Felletseng | Teko ea Khetla ea Hydrostatic | Botšepehi ba khatello ka API 598 |
| Valve e Felletseng | Teko ea Setulo sa Hydrostatic | Botšepehi ba tiiso ea setulo ka API 598 |
| Valve e Felletseng | Teko ea Tshebetso ea Cryogenic ho latela BS 6364 | Netefatso ea ts'ebetso ea -196°C |
| Valve e Felletseng | Teko ea ho Ntša Mosi ka Balehi (ho latela ISO 15848-1) | Botšepehi ba tiiso e tlase ea ho lutla |
| Valve e Felletseng | Tlhahlobo ea Pono le ea Dimension | Netefatso ea boleng ba ho qetela |
| Valve e Felletseng | Netefatso ea ho tšoaea | Netefatsa hore ho na le letšoao la kamehla ho latela maemo |
Liteko tsa Boikhethelo bakeng sa Litšebeliso tsa Bohlokoa tsa Cryogenic:
8. Litšebeliso tsa Motheo – Valve ea Heke ea Cryogenic (-196°C)
9. Pakete le Thomello – Valve ea Heke ea Cryogenic (-196°C)
Sephutheloana:
Ho tsamaisa ka sekepe:
Litokomane tse Fanoang ka Thomello e 'Ngoe le e 'Ngoe:
10. Melemo le Lipotso Tse Botsoang Khafetsa ka Tšepe ea Womic - Valve ea Heke ea Cryogenic (-196°C)
Hobaneng o lokela ho sebelisana le Womic Steel bakeng sa Cryogenic Gate Valve?
Lipotso Tse Botsoang Khafetsa (Lipotso Tse Botsoang Khafetsa) – Valve ea Heke ea Cryogenic (-196°C)
P: Phapang ke efe pakeng tsa valve ea heke e nang le cryogenic le valve ea heke e tloaelehileng?
K: Li-valve tsa heke ea cryogenic li na le likarolo tse 'maloa tsa bohlokoa tse sa fumaneheng li-valve tse tloaelehileng: bonnet e atolositsoeng e nang le poleiti ea ho rotha ho sireletsa litiiso tsa kutu; kalafo e tebileng ea cryogenic ea likarolo tsohle; heke e thata ea Stellite le libaka tsa ho koala litulo bakeng sa ho hanyetsa ho tsofala; thepa e khethehileng bakeng sa ho tiea mochesong o tlase; ho paka mosi o fokolang o balehang; le tlhahlobo ea ts'ebetso ea cryogenic e tlamang ho latela BS 6364. Li-valve tse tloaelehileng tsa heke hangata li na le li-bonnet tse sa atolosoang, libaka tsa ho koala tse sa thatafalloang, 'me ha li na liteko tsa cryogenic.
P: Mocheso o tlase wa tshebeletso bakeng sa di-valve tsa heke ya hao ya cryogenic ke ofe?
K: Li-valve tsa rona tsa heke tse tloaelehileng tsa cryogenic li lekantsoe bakeng sa tšebeletso ea -196°C (mocheso oa naetrojene e metsi) ho latela BS 6364. Bakeng sa tšebeletso ea haedrojene e metsi (-253°C) kapa helium e metsi (-269°C), re fana ka meralo e ikhethileng e nang le thepa le litiiso tse fetotsoeng.
P: Kalafo ea cryogenic e tebileng ke eng, hona hobaneng e hlokahala?
K: Kalafo e tebileng ea cryogenic ke ts'ebetso ea ho pholisa likarolo tsa valve ho -196°C bonyane lihora tse 8. Sena se fetola austenite e bolokiloeng, se imolla likhatello tse setseng, 'me se netefatsa botsitso ba boholo mochesong oa ts'ebeletso. BS 6364 e hloka kalafo e tebileng ea cryogenic bakeng sa li-valve tse nang le mocheso oa ts'ebeletso ≤ -101°C.
P: Stellite hardfacing ke eng mme hobaneng e sebediswa?
K: Ho tiisa mahlakore ka thata ha Stellite ke ho sebedisa motsoako wa cobalt-chromium o sa senyeheng (Stellite 6 kapa 21) hodima dibaka tsa ho kwala tsa heke le setulo. Sena se fana ka kganyetso e ntle ya ho se senyehe, se thibela ho teneha le ho tshwarwa ke mocheso o feteletseng, mme se eketsa bophelo ba tshebeletso ya di-valve haholo. Ho tiisa mahlakore ka thata ha Stellite ke karolo e tlwaelehileng ya di-valve tsa heke tse nang le cryogenic ka API 600.
P: Phapang ke efe pakeng tsa meralo ea heke ea wedge le ea parallel slide heke?
K: Li-valve tsa heke ea wedge (wedge e tiileng kapa e tenyetsehang) hangata li sebelisoa bakeng sa boholo bo fihlang ho 24" 'me li fana ka ts'ebetso e ntle ea ho koala. Li-valve tsa heke ea parallel slide (litulo tse phaphametseng) li sebelisoa bakeng sa boholo bo boholo (≥ 12") 'me li fokotsa torque ea ts'ebetso ha li ntse li boloka ts'ebetso e ntle ea ho tiisa lits'ebetsong tsa ho potoloha ha mocheso.
P: Na tlhahlobo ea ts'ebetso ea cryogenic e tlamang?
A: Ho ya ka BS 6364 le MSS SP-134, teko ya tshebetso ya cryogenic e a hlokahala bakeng sa di-valve tse sebediswang tshebeletsong ya LNG le cryogenic. Diteko di lokela ho etswa ho -196°C (naetrojene e metsi) ka teko ya setulo sa pneumatic se nang le kgatello e tlase kamora ho tsitsisa mocheso. Womic e etsa teko ya tshebetso ya cryogenic ya 100% hodima valve e nngwe le e nngwe ya heke ya cryogenic pele e romelwa.
P: Na le fana ka sephutheloana sa ho ntša mosi o fokolang o balehang?
K: E. Li-valve tsohle tsa rona tsa heke tse nang le cryogenic li fanoa ka sephutheloana sa mosi o fokolang o sa sebetseng se lekiloeng ho latela ISO 15848-1. Re ka fana ka setifikeiti sa Sehlopha sa A kapa sa Sehlopha sa B ho latela litlhoko tsa hau.
P: Na o ka fana ka di-valve tsa heke tse nang le cryogenic ka ho latela melao ya NACE MR0175?
K: E. Bakeng sa lits'ebetso tsa cryogenic tsa tšebeletso e bolila (LNG e nang le H2S kapa ethylene e nang le H2S), re fana ka li-valve tsa heke ea cryogenic tse nang le thepa e lumellanang le NACE MR0175 / ISO 15156. Sena se kenyelletsa teko ea ho thatafala, khetho e nepahetseng ea thepa, le ho latela melao e ngotsoeng.
P: Nako e tloaelehileng ea ho etella pele bakeng sa li-valve tsa heke ea cryogenic ke efe?
A: Nako e tloaelehileng ea ho etella pele ke libeke tse 10-14 bakeng sa litlhophiso tse tloaelehileng (boholo ≤ 24", Sehlopha sa 150-600). Bakeng sa boholo bo boholo (> 24") kapa khatello e phahameng (Sehlopha sa 900+), nako ea ho etella pele ke libeke tse 16-22. Liodara tse potlakileng li ka fumaneha bakeng sa bongata bo bonyenyane.
P: Na le fana ka ts'ebetso bakeng sa li-valve tsa heke tse nang le cryogenic?
K: E. Re fana ka ts'ebetso ea letsoho ka opereishene ea lebili la letsoho kapa ea gear, actuation ea pneumatic (spring-return kapa double-acting), actuation ea motlakase (on-off kapa modulating), le actuation ea hydraulic. Li-actuator tsohle li boholo bo lekaneng ho fana ka torque e lekaneng mochesong oa cryogenic.
Phihlelo ea Morero le Thuto ea Nyeoe - Valve ea Heke ea Cryogenic (-196°C)
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Nako ea poso: Phuptjane-25-2026