1. Txheej Txheem Txheeb Xyuas

NACE MR0175/ISO 15156 yog tus qauv thoob ntiaj teb uas lees paub rau kev xaiv cov khoom siv hlau rau kev siv hauv cov chaw tsim roj thiab roj av uas muaj H₂S (qaub). NACE International (tam sim no yog AMPP) thiab Lub Koom Haum Thoob Ntiaj Teb rau Kev Txheem (ISO) tau luam tawm ua ke, qhov kev hloov kho tshiab tam sim no yog ANSI/NACE MR0175-2021/ISO 15156:2020.

Qhov kev tsim cov qauv no yog los ntawm kev thawb kev lag luam mus rau hauv cov chaw tob dua thiab cov peev txheej nyob deb ntawm ntug dej hiav txwv. Raws li kev txhim kho ntawm cov roj thiab cov roj av qaub nce ntxiv, kev xeb los ntawm hydrogen sulfide tau dhau los ua qhov tseem ceeb dua - tshwj xeeb tshaj yog sulfide kev ntxhov siab tawg (SSC), uas tuaj yeem ua rau brittle failure hauv cov pa roj carbon siab thiab cov hlau qis-alloy, ua rau muaj xwm txheej loj heev.

2. Cov Qauv Txheem thiab Qhov Coob

Tus qauv no muab faib ua peb ntu, muab ua ke ua ib daim ntawv PDF xwb, thiab suav nrog ntau daim ntawv tshaj tawm txog kev siv tshuab uas tau luam tawm xyoo 2021 thiab 2022:

Ib feem	Scope	Cov Ntsiab Lus Tseem Ceeb
Tshooj 1	Cov Ntsiab Cai Dav Dav	Txhais cov chaw ib puag ncig qaub ncaug, cov ntsiab cai xaiv cov khoom siv yooj yim, cov txheej txheem kev tsim nyog
Tshooj 2	Cov Hlau Carbon & Cov Hlau Uas Tsis Muaj Hlau Ntau	Cov kev txwv ntawm qhov nyuaj (≤22 HRC), qhov yuav tsum tau vuam, kev tswj tshuaj lom neeg
Tshooj 3	CRAs & Lwm Cov Khoom Sib Xyaws	Cov kev txwv ib puag ncig rau ib tsev neeg alloy (kub, pH₂S, chloride concentration)

Tus qauv no siv rau cov khoom siv hauv kev tsim roj thiab roj av thiab cov chaw tsim roj av qab zib uas qhov kev ua tsis tiav yuav ua rau muaj kev pheej hmoo rau pej xeem thiab cov neeg ua haujlwm kev noj qab haus huv thiab kev nyab xeeb lossis rau ib puag ncig. Nws hais txog txhua txoj hauv kev tawg uas tshwm sim los ntawm H₂S, suav nrog SSC, SCC, HIC, SWC, thiab lwm yam.

3. Kev Txhais ntawm Ib puag ncig Qaub

Raws li tus qauv, thaum lub siab ib nrab ntawm H₂S hauv theem roj tshaj 0.3 kPa (0.05 psia), qhov chaw ib puag ncig raug cais ua qaub, xav tau kev xaiv cov khoom siv raws li cov qauv xav tau.

Cov khoom siv siv tau suav nrog cov qhov dej, cov ntoo Christmas, cov kav dej, cov khoom sib cais, cov kab ntws hauv cov chaw tsim khoom sab saud, thiab cov kav dej thauj cov hydrocarbons qaub.

4. Cov Khoom Siv Tseem Ceeb Yuav Tsum Tau Ua

Cov Hlau Carbon thiab Cov Hlau Uas Tsis Muaj Hlau Sib Xyaws (Ntu 2)

Cov hlau puag, cov hlau vuam, thiab HAZ hardness yuav tsum tsis pub tshaj 22 HRC (248 HV10)

Kev kho cua sov tom qab vuam (PWHT) yog qhov yuav tsum tau ua

Yuav tsum tau tswj hwm tshuaj lom neeg nruj heev

Cov Hlau Uas Tiv Thaiv Kev Xeb (Ntu 3)

Cov ntaub ntawv tsim nyog feem ntau suav nrog: 316 SS, 6-moly alloys, 2507 duplex SS, Alloy 825, Alloy 625, Alloy C-276, thiab Alloy 400. Txhua tus muaj cov kev txwv ib puag ncig tshwj xeeb rau qhov kub thiab txias, H₂S ib nrab siab, thiab chloride concentration.

5. Cov Kev Hloov Tshiab Tseem Ceeb thiab Kev Cia Siab Yav Tom Ntej

Tsab ntawv xyoo 2021/2020 tseem zoo ib yam li tsab ntawv xyoo 2003, nrog rau kev hloov kho me ntsis los ntawm Cov Ntawv Qhia Txog Kev Siv Tshuab. Xyoo 2018, cov pawg neeg tswj hwm tau pom zoo tias kev sau dua tshiab loj yog qhov tsim nyog los daws teeb meem yooj yim ntawm kev siv thiab suav nrog kev nce qib hauv kev lag luam.

Ib qho version uas tau hloov kho dua tshiab tam sim no tab tom raug xaiv tsa thiab tshaj tawm los ntawm ISO, uas tau hloov kho dua tshiab ua peb ntu tshiab:

Ntu 1: Cov khoom siv thiab cov kev cai ua tiav

Ntu 2: Kev ntsuam xyuas ib puag ncig kev pabcuam thiab kev xaiv cov khoom siv

Ntu 3: Kev txheeb xyuas, kev tsim nyog, thiab cov kev cai pov npav

Daim ntawv tshiab muab cov ntsiab lus ntxiv txog cov txheej txheem kuaj H₂S, suav nrog cov lus qhia txog kev kuaj, kev xaiv txoj kev kuaj, thiab qhov dav ntawm kev kuaj uas xav tau rau kev tsim nyog ntawm cov khoom.

6. Qhov Tseem Ceeb ntawm Kev Ua Haujlwm

NACE MR0175/ISO 15156 ua lub hauv paus tseem ceeb rau kev xaiv cov khoom siv hauv kev tsim cov roj thiab cov roj av uas tsis muaj zog. Tus qauv hais tias tsis muaj cov hlau tsis xeb uas tiv thaiv tau qhov tawg ntawm chloride-induced stress corrosion cracking - kev nkag siab zoo txog cov kev txwv ntawm cov hlau alloy yog qhov tseem ceeb rau kev xaiv cov khoom siv hauv cov chaw uas muaj zog heev. Cov khoom siv uas yooj yim rau kev xeb, xws li cov li qub, cov khoom siv, thiab cov cuab yeej siv, yuav tsum ua raws li tus qauv nruj heev. Txhua yam khoom siv uas tsis muaj zog yuav tsum khaws cia kom muaj kev taug qab tag nrho, nrog rau daim ntawv pov thawj kuaj xyuas lub zeb lees paub qhov kev sim tawv, kev ua raws li tshuaj lom neeg, thiab kev kho cua sov.

Hauv cov chaw ua roj thiab roj av uas tsis muaj zog, kev xaiv cov khoom siv feem ntau ua raws li tus qauv NACE MR0175 / ISO 15156. Tus qauv no yog "txoj cai kub" rau kev ua haujlwm kom muaj kev nyab xeeb ntawm cov khoom siv hauv cov chaw muaj hydrogen sulfide (H₂S). Nws suav nrog txhua yam khoom siv thiab cov khoom siv uas muaj siab, los ntawm cov chaw ua haujlwm wellhead mus rau cov chaw ua haujlwm downstream.

Cov khoom siv hauv qhov dej thiab qhov downhole: cov khoom siv hauv qhov dej, cov yeeb nkab thiab cov hlua casing (cov yeeb nkab ntau lawm, casing).

Cov kav dej thiab cov khoom txuas: cov kav dej siv rau kev xa roj thiab roj mus deb, piv txwv li,API 5L qib X65 kab yeeb nkab, thiab lwm yam.

Cov khoom siv ua thiab hloov chaw saum npoo av: cov hlab siab, cov khoom sib cais - cov khoom siv uas muaj siab siv rau kev sib cais thiab ua roj/roj.

Ntxiv rau cov khoom saum toj no, tus qauv kuj tseem suav nrog ntau hom khoom siv, suav nrog cov hlau carbon, cov hlau tsis tshua muaj hlau, cov hlau tsis xeb, thiab cov hlau nickel uas ua los ntawm nickel.