1. Kakaretso e Tloaelehileng

NACE MR0175/ISO 15156 ke tekanyetso e tsebahalang lefatšeng ka bophara bakeng sa khetho ea thepa ea tšepe bakeng sa tšebeliso libakeng tsa tlhahiso ea oli le khase tse nang le H₂S (e bolila). E phatlalalitsoe ka kopanelo ke NACE International (eo hona joale e leng AMPP) le Mokhatlo oa Machaba oa Maemo a Tekanyetso (ISO), ntlafatso ea hajoale e sebetsang ke ANSI/NACE MR0175-2021/ISO 15156:2020.

Ho thehwa ha tekanyetso ena ho tswa ho sutumelletswa ha indasteri ho ya dibopehong tse tebileng le mehloding e hole haholo lebopong. Ha ntshetsopele ya masimo a oli le khase e bolila e ntse e eketseha, mafome a bakwang ke hydrogen sulfide a se a ntse a le bohlokwa haholo—haholoholo ho phatloha ha kgatello ya sulfide (SSC), e leng se ka bakang ho hloleha ho tetebela ha ditshipi tse matla tsa khabone le tse nang le alloy e tlase, e leng se lebisang diketsahalong tse kotsi.

2. Sebopeho se Tloaelehileng le Sekhahla

Tekanyetso e arotsoe likarolo tse tharo, e kopantsoe ho ba faele e le 'ngoe ea PDF, 'me e kenyelletsa Li-circular tse ngata tsa Tekheniki tse phatlalalitsoeng ka 2021 le 2022:

Karolo	Sebaka	Dikahare tsa Bohlokoa
Karolo ea 1	Melao-motheo e Akaretsang	E hlalosa tikoloho e bolila, melao-motheo ea motheo ea khetho ea thepa, mekhoa ea ho tšoaneleha
Karolo ea 2	Tšepe tsa Khabone le tse se nang motsoako o tlase	Meeli ea ho thatafala (≤22 HRC), litlhoko tsa ho tjheseletsa, taolo ea k'hemistri
Karolo ea 3	Li-CRA le Li-Alloy tse ling	Meeli ea tikoloho ka lelapa la motsoako (mocheso, pH₂S, mahloriso a chloride)

Tekanyetso ena e sebetsa ho disebediswa tse sebediswang tlhahisong ya oli le kgase le difemeng tsa ho natefisa kgase ya tlhaho moo ho hloleha ho ka bakang dikotsi bophelong le polokehong ya setjhaba le ya basebetsi kapa tikolohong. E sebetsana le mekgwa yohle ya ho petsoha e bakwang ke H₂S, ho kenyeletswa SSC, SCC, HIC, SWC, le tse ding.

3. Tlhaloso ea Tikoloho e Bolila

Ho ya ka maemo, ha kgatello e sa fellang ya H₂S mohatong wa kgase e feta 0.3 kPa (0.05 psia), tikoloho e arolwa e le e bolila, e hlokang kgetho ya thepa ho ya ka ditlhoko tsa maemo.

Lisebelisoa tse sebetsang li kenyelletsa lithapo tsa liliba, lifate tsa Keresemese, litsamaiso tsa liphaephe, li-arolator, lithapo tsa phallo libakeng tsa tlhahiso tse holimo, le litsamaiso tsa liphaephe tse tsamaisang li-hydrocarbon tse bolila.

4. Litlhoko tsa Bohlokoa tsa Thepa

Tšepe tsa Khabone le tsa Alloy e Tlase (Karolo ea 2)

Tšepe ea motheo, tšepe e welded, le boima ba HAZ ha lia lokela ho feta 22 HRC (248 HV10)

Kalafo ea mocheso ka mor'a ho chesetsoa (PWHT) ke ea tlamo

Taolo e tiileng ea k'hemistri e hlokahala

Li-alloy tse hanang mafome (Karolo ea 3)

Lisebelisoa tse tšoanelehang hangata li kenyelletsa: 316 SS, li-alloy tsa 6-moly, 2507 duplex SS, Alloy 825, Alloy 625, Alloy C-276, le Alloy 400. E 'ngoe le e 'ngoe e na le meeli e itseng ea tikoloho bakeng sa mocheso, khatello e sa fellang ea H₂S, le mahloriso a chloride.

5. Lintlafatso tsa Bohlokoa le Pono ea Nakong e Tlang

Khatiso ea 2021/2020 e ntse e ts'oana le ea khatiso ea 2003 ka sebopeho, ka liphetoho tse ntseng li eketseha ka Li-Technical Circulars. Ka 2018, likomiti tse busang li ile tsa lumellana hore ho hlokahala hore ho ngoloe bocha ho hoholo ho sebetsanoe le bonolo ba ts'ebeliso le ho kenyelletsa tsoelo-pele ea indasteri.

Phetolelo e ngotsoeng bocha ka botlalo e ntse e hlahlojoa le ho phatlalatsoa ka ISO, e hlophisitsoeng bocha ka likarolo tse tharo tse ncha:

Karolo ea 1: Litlhoko tsa thepa le ts'ebetso

Karolo ea 2: Tlhahlobo ea tikoloho ea litšebeletso le khetho ea thepa

Karolo ea 3: Litlhoko tsa netefatso, mangolo a ho tšoaneleha le tsa ho vouta

Phetolelo e ncha e fana ka lintlha tse batsi haholoanyane mabapi le mekhoa ea tlhahlobo ea H₂S, ho kenyeletsoa le tataiso mabapi le ho nka lisampole, khetho ea mokhoa oa teko, le tekanyo ea liteko tse hlokahalang bakeng sa ho tšoaneleha ha sehlahisoa.

6. Bohlokoa bo Sebetsang

NACE MR0175/ISO 15156 e sebetsa e le motheo oa motheo oa khetho ea thepa nts'etsopele ea oli e bolila le tšimo ea khase. Tekanyetso e totobatsa hore ha ho na tšepe e sa hloekang e sa sireletsehang ka ho feletseng ho petsoheng ha mafome a bakoang ke khatello ea chloride—kutloisiso e felletseng ea mefokolo ea alloy e bohlokoa bakeng sa khetho ea thepa libakeng tse bolila tse hlokang mafome. Lisebelisoa tse kotsing ea mafome haholo-holo, tse kang li-valve, li-fittings le lisebelisoa, li hloka ho latela melao ka tieo. Lisebelisoa tsohle tsa tšebeletso ea bolila li tlameha ho boloka ho latela melao ka botlalo, ka litifikeiti tsa teko ea tšilo tse tiisang tlhahlobo ea thatafalo, ho latela melao ea lik'hemik'hale le boemo ba kalafo ea mocheso.

Libakeng tsa oli le khase tse bolila, khetho ea thepa e latela haholo-holo maemo a NACE MR0175 / ISO 15156. Maemo ana ke "molao oa khauta" oa ho netefatsa ts'ebetso e sireletsehileng ea lisebelisoa libakeng tse nang le hydrogen sulfide (H₂S). E akaretsa lisebelisoa le likarolo tsohle tse nang le khatello, ho tloha litsing tsa liliba ho ea ho li-unit tsa ts'ebetso tse tlase.

Lisebelisoa tsa hlooho ea liliba le mokoti o theohelang: lisebelisoa tsa hlooho ea liliba, liphaephe le likhoele tsa sekoahelo (liphaephe tsa tlhahiso, sekoahelo).

Dikarolo tsa diphaephe le ho hokahanya: phaephe ya mohala e sebediswang bakeng sa phetiso ya oli le kgase e hole, mohlala,Sehlopha sa API 5L X65 phaephe ea mohala, jj.

Lisebelisoa tsa ho sebetsana le ho fetisetsa bokaholimo: lijana tsa khatello, li-apartator – lisebelisoa tse nang le khatello tse sebelisetsoang ho arola le ho sebetsana le oli/khase.

Ntle le dihlahiswa tse boletsweng ka hodimo, maemo ana a boetse a akaretsa mefuta e fapaneng ya thepa, ho kenyeletswa tshepe ya khabone, tshepe e nang le motswako o tlase, tshepe e sa ruseng le di-alloy tse thehilweng ho nickel.