NWS MR0175(officially npeTS EN ISO 15156) yog tus txheej txheem thoob ntiaj teb uas muab cov kev xav tau thiab cov lus pom zoo rau kev xaiv thiab tsim nyog cov khoom siv hlau rau cov khoom siv hauv cov roj thiab roj ntau lawm hauv ib puag ncig uas muajHydrogen sulfide (H2S ).
Hauv kev lag luam, cov cheeb tsam no yog hu ua"Siab Service."
Upstream los yog Downstream? Tsis paub meej tias koj xav tau MR0175 lossis MR0103?Tiv tauj peb rau qhov tseeb Technical Specification.
Tiv thaiv Brittle Failure
Lub hom phiaj tseem ceeb ntawm tus qauv yog los tiv thaivSulfide Stress Cracking (SSC)thiab lwm yam ntaub ntawv ntawmHydrogen{0}}Induced Cracking (HIC).
Thaum H2S muaj nyob rau hauv lub xub ntiag ntawm dej, nws tso tawm hydrogen atoms nkag mus rau hauv cov hlau. Yog tias cov hlau hnyav dhau los yog muaj kev ntxhov siab ntau, nws yuav tawg thiab poob sai sai - feem ntau tsis muaj kev ceeb toom lossis ua ntej ntawm cov hlau.
Teem Hardness txwv
Txoj cai nto moo tshaj plaws hauv NACE MR0175 yogHardness txwv.
Rau cov pa roj carbon thiab tsawg- alloy steels, qhov hardness feem ntau txwv rau qhov siab tshaj plaws22 HRC (Rockwell C).
Tus txheej txheem tsim kom muaj cov hlau softer tshaj qhov kev txwv no tsawg dua yuav ua nkig thiab tawg hauv qhov chaw qaub.
Kev xaiv khoom & Kev kho cua sov
Tus qauv qhia tias cov ntaub ntawv twg tsim nyog rau kev pabcuam qaub thiab yuav tsum tau kho li cas. Piv txwv li:
Kev kho cua sov:Nws feem ntau ua haujlwmQuenched & Tempered (Q + T)los yogLi qubcov txheej txheem los xyuas kom meej cov qauv zoo ib yam.
Chemistry:Nws yuav tsum tau qis qis ntawm impurities xws li Sulfur (S) thiab Phosphorus (P).
Ua haujlwm txias:Nws txwv ntau npaum li cas cov hlau tuaj yeem ua tau txias-, vim tias kev ua haujlwm txias ua rau muaj zog thiab kev ntxhov siab sab hauv.
Txhais "Sour" Environments
NACE MR0175 muab cov qauv los suav covIb nrab siab ntawm H2S. Nws txiav txim siab ntawm qhov twg lub qhov dej ua "Sour" txaus los xav tau cov ntaub ntawv tshwj xeeb no (feem ntau thaum H2S ib nrab siab tshaj0.05psi ua).
Scope ntawm Cov Khoom Siv
Tus qauv siv rau yuav luag txhua yam khoom siv hlau hauv cov kwj deg, suav nrog:
OCTG:Casing thiab tubing.
Cov kav dej:Cov kav dej.
Wellheads:Valves, manifolds, thiab Christmas ntoo.
Refinery/Processing:Cov hlab ntsha siab thiab cov khoom siv hluav taws xob.
GNEENACE MR0175 API OCTG Txheej Txheem Kab
GNEENACE MR0175 API OCTG Pipe Test Equipments
GNEENACE MR0175 API 5CT OCTG Pipe daim ntawv pov thawj
FAQ
Q1: Puas yog NACE MR0175 zoo ib yam li ISO 15156?
A: Yog, lawv yeej tseem zoo tib yam. Txij li xyoo 2003, NACE thiab ISO tau ua raws li cov qauv no. Lub npe official yogANSI/NACE MR0175/ISO 15156.
Ntu 1:Cov ntsiab cai dav dav rau kev xaiv cov khoom tawg yooj yim -cov ntaub ntawv tiv taus.
Ntu 2:Yuav tsum muaj cov pa roj carbon thiab tsawg- alloy steels.
Ntu 3:Qhov yuav tsum tau muaj rau corrosion{0}}resistant alloys (CRAs).
GNEE Tus nqi:Peb muab Cov Ntawv Pov Thawj Xeem Khoom (MTC) uas qhia meej txog NACE MR0175 thiab ISO 15156, kom ntseeg tau tias koj qhov project hla thoob ntiaj teb kev soj ntsuam kev ua raws cai yam tsis muaj kev sib txhuam.
Q2: Kuv qhov project yog rau lub refinery; Kuv yuav tsum siv NACE MR0175 lossis NACE MR0103?
A: Qhov no yog qhov sib txawv thiab tseem ceeb.
NWS MR0175yog rauNce toj(Cov roj thiab roj ntau lawm, drilling, thiab sib sau ua ke). Nws xav tias muaj cov ntsiab lus sulfur thiab siab dua.
NACE MR0103yog rauHauv qab(Refineries thiab petrochemical ua). Nws xav tias ib puag ncig tshuaj sib txawv (pH qis dua, kev kho amine sib txawv).
Peb Tus Nqi:Yog tias koj tab tom tsim lub refinery, MR0103 feem ntau yog tus qauv raug. Peb tuaj yeem pab koj txheeb xyuas koj qhov project specs kom paub tseeb tias koj tsis "dhau-qhia" lossis "hauv- qhia," txuag koj ob lub sijhawm thiab nyiaj txiag.
Q3: Puas yog NACE MR0175 ua raws li kev lees paub tias cov yeeb nkab yuav tsis corrode?
A: Tsis yog NACE MR0175 tshwj xeeb tsim los tiv thaivStress Cracking (Brittle Failure), uas yog tam sim ntawd thiab kev puas tsuaj. Nws uatsis yogyuav tsum tiv thaiv "qhov hnyav- poob corrosion" (kev xeb lossis thinning).
Peb Tus Nqi:Yog tias koj ib puag ncig kuj muaj corrosive (siab CO2lossis Oxygen), kev ua raws NACE tsuas yog thawj kauj ruam xwb. Peb tuaj yeem muab cov kev daws teeb meem ntxiv xws liCorrosion Inhibitorslos yog kho dua tshiab rau13Cr / Stainless hlau alloyskom ntseeg tau tias koj lub raj xa dej tsis yog "tsis tawg," tab sis kuj tsis "slim tawm" dhau sijhawm.
