Yuav Ua Li Cas Xaiv Cov Khoom Siv Roj thiab Roj Ua Lag Luam Zoo?

Lub hauv paus ntawm kev xaiv cov khoom siv rau kev lag luam roj thiab roj yog nyob rau hauv kev ua haujlwm zoo sib xws nrog cov khoom siv. Tau ntsib ib puag ncig hnyav xws li qhov kub thiab txias, cov ntsiab lus ntawm sulfur thiab chlorine, thiab ntau theem ntws yaig, qhov muag tsis pom kev xaiv dav dav - lub hom phiaj qhov chaw tuaj yeem ua rau xau, tawg, lossis tsis tau npaj tseg. Cov hauv qab no yog ib qho kev xaiv zoo raws li peb tus yam ntxwv tseem ceeb: corrosion resistance, siab zog, thiab hnav tsis kam:

Xaiv cov khoom raws li kev tiv thaiv corrosion: Sib ntaus sib tua "Invisible Killers" xws li H₂S, CO₂, thiab chloride Ions

Corrosion yog thawj qhov ua rau cov khoom siv roj thiab roj tsis ua haujlwm. Kev xaiv cov khoom siv yuav tsum yog nyob ntawm hom nruab nrab thiab ib puag ncig qib:

H₂S{0}}muaj ib puag ncig (acidic tej yam kev mob): Yuav tsum ua raws li NACE MR0175/ISO 15156 cov qauv, ua ntej cov ntaub ntawv tiv taus sulfide kev nyuaj siab tawg (SSC):

• Cov pa roj carbon steel thiab qis- alloy steel: Tensile zog yuav tsum tsawg dua los yog sib npaug rau 655MPa, hardness Tsawg dua los yog sib npaug rau 22 HRC, thiab kev ntxhov siab- yuav tsum tau ua kom muaj kev kho cua sov.
• Corrosion-resistant alloys (CRAs): Rau siab- cov pa roj sulfur, nickel-raws li alloys (xws li Inconel 625, Monel 400) los yog duplex stainless hlau (xws li 2205) raug pom zoo, vim lawv ua tau zoo nyob rau hauv ib puag ncig uas H₂S thiab coex chloride.
• High-kub sulfur corrosion (refining units): carbon steel + 0Cr13 composite daim hlau los yog 321 stainless hlau tuaj yeem siv rau siab - qhov kub ntawm qhov ntauwd lub cev; aluminized carbon steel los yog 0Cr18Ni10Ti yog pom zoo rau cov tshav kub exchanger raj bundles.
• Seawater or high-chlorine environments: Aluminum bronze (ZQAl9-4) is preferred, as it can form a dense oxide film on its surface, exhibiting excellent resistance to seawater corrosion and is suitable for pump and valve components on ships and FPSO platforms.

Kev xaiv raws li lub zog muaj zog: Nrog rau kev siab siab thiab kev siv tshuab

Hauv kev sib sib zog nqus thiab ultra- kev ua haujlwm zoo sib sib zog nqus, cov khoom siv yuav tsum tiv taus siab zoo li qub thiab cov khoom hnyav heev:

• Studs thiab Fasteners: Tag nrho threaded studs yog yooj yim rau nkag mus so ntawm qhov kub siab (siab tshaj 450 degree). High-kub creep- cov ntaub ntawv tiv thaiv yuav tsum raug xaiv, xws li cov hlau tshwj xeeb tsim los ntawm Wuxi ASMI, uas tuaj yeem tiv taus qhov kub txog li 500℃thiab tau dhau qhov qis- qhov ntsuas kub ntawm -101℃.
• Drill Pipes thiab Casing: Yuav tsum ua tau raws li API 5CT cov qauv, nrog rau kev qhia meej meej cov khoom siv zog (piv txwv li, P110, Q125). Rau siab - qhov chaw muaj kev ntxhov siab, carbon fiber reinforced PEEK cov ntaub ntawv sib xyaw tau pom zoo, vim tias lawv muaj kev qaug zog zoo heev thiab tsim nyog rau cov khoom siv precision xws li cov cuab yeej siv log log.
• Valve Siab Bearings: Siab - siab oxygen valve lub cev yuav tsum yog ua los ntawm Monel los yog Inconel nickel-raws li alloys. Tsis txhob siv cov pa roj carbon steel rooj vag li qub, uas ua rau muaj qhov tawg.