Stainless hlau seamless kavfeem ntau ua tau raws li qhov yuav tsum tau muaj ntawm ntau qhov chaw ua haujlwm hnyav los ntawm kev xaiv cov khoom siv thiab kev ua kom zoo dua qub, thiab yog cov kev daws teeb meem zoo tshaj plaws rau cov kav dej niaj hnub.
Stainless hlau seamless kavmuaj ntau yam kev siv hauv kev lag luam petrochemical, feem ntau yog vim lawv cov corrosion kuj zoo heev, lub zog siab, siab kub thiab siab siab, thiab kev ua haujlwm zoo.
Nov yog nws cov kev thov tshwj xeeb thiab qhov zoo:
1. Main daim ntawv thov scenarios ntawmseamless kav
(1) Qhov kub thiab txias ib puag ncig
-Refinery unit: siab - kub thiab siab - cov kav dej siab siv nyob rau hauv atmospheric thiab nqus distillation, catalytic cracking, hydrocracking thiab lwm yam units, xws li reactor inlet thiab qhov hluav taws xob pipelines, cua sov rauv raj, thiab lwm yam.
-Ethylene cracking unit: Nyob rau hauv siab- kub (txog 1000℃lossis siab dua) ib puag ncig xws li tawg rauv thiab cua txias ceev, stainless hlau seamless kav (xws li 310S thiab 347H cov ntaub ntawv) tuaj yeem tiv taus siab -kub oxidation thiab carburizing teeb meem.
(2) Kev thauj khoom corrosive media
-Acidic ib puag ncig: Roj thiab roj rho tawm hauv cov xov xwm corrosive xws li hydrogen sulfide (H ₂ S), carbon dioxide (CO ₂), chloride, thiab lwm yam
Austenitic stainless hlau (xws li 316L, 904L) los yog duplex steel (xws li 2205) tuaj yeem tiv taus pitting corrosion thiab kev ntxhov siab corrosion hauv cov txheej txheem xws li cov roj purification thiab sulfur rov qab.
-Acid alkali cia thiab tsheb thauj mus los: lub raj xa dej siv los thauj cov tshuaj xws li concentrated sulfuric acid, nitric acid, alkaline kua, thiab lwm yam.
(3) Cov khoom siv hluav taws xob sib hloov
-Tube bundles ntawm tshav kub exchangers: Stainless hlau seamless hlab (xws li 304, 316) yog dav siv nyob rau hauv cov khoom siv tshav kub pauv xws li condensers thiab reboilers vim lawv corrosion kuj thiab thermal conductivity.
(4) Instrumentation thiab Control System
-Tswj raj: Me me caliber stainless hlau seamlesstubings (xws li 1/4 "~ 2") yog siv los ua cov kav dej impulse rau cov ntsuas siab, ntsuas ntsuas, thiab lwm yam cuab yeej los xyuas kom meej qhov ntsuas qhov tseeb thiab kev nyab xeeb.
(5) Lwm yam khoom siv tseem ceeb
-Reactor internals: siv los ua catalyst xa cov kav dej, cov kav dej txias sab hauv, thiab lwm yam.
-LNG qis-kub pipeline: Austenitic stainless hlau (xws li 304L, 316L) tuav zoo toughness ntawm qis kub thiab yog haum rau thauj liquefied natural gas (-162℃).
2. Feem ntau siv cov khoom siv stainless hlau
-Austenitic stainless hlau:
-304/304L: Universal hom, siv nyob rau hauv dav corrosive ib puag ncig.
-316/316L: muaj molybdenum, resistant rau chloride corrosion, haum rau seawater los yog siab ntsev ib puag ncig.
-321/347H: muaj titanium los yog niobium, tiv taus kub oxidation, siv rau cua sov rauv tub.
-Dual-theem stainless hlau (xws li 2205, 2507): muab lub zog siab thiab ua haujlwm rau cov tshuaj chloride kev nyuaj siab corrosion, haum rau ib puag ncig hnyav (xws li cov kav dej hauv qab).
-High nickel alloys (xws li Inconel 625, 825): siv nyob rau hauv huab cua corrosion (xws li high concentration acidic oil and gas fields).
3. Core zoo ntawm seamless kav
-Kev tiv thaiv corrosion: Tiv thaiv cov electrochemical corrosion, intergranular corrosion, thiab kev ntxhov siab corrosion tawg hauv kev lag luam petrochemical.
-High lub zog: Seamless txheej txheem tsis muaj cov ntsiab lus tsis muaj zog nyob rau hauv lub vuam seam, nrog zoo siab bearing muaj peev xwm tshaj welded kav.
- Kev huv huv: Cov phab ntsa sab hauv du, tsis yooj yim rau scaling, haum rau siab -purity media (xws li kev tsim tshuaj nruab nrab).
-Longevity: Txo cov sij hawm tu ncua sij hawm thiab txo nqi tag nrho lub neej.
4. Cov qauv kev lag luam thiab cov ntawv pov thawj
-Cov qauv thoob ntiaj teb: ASTM A312 (austenitic stainless hlau yeeb nkab), ASTM A790 (duplex seamless steel yeeb nkab), API 5LC (corrosion-resistant alloy pipeline yeeb nkab).
- Cov qauv hauv tsev: GB/T 14976 (Seamless Stainless Steel Pipes for Fluid Transport), GB 9948 (Seamless Pipes for Petroleum Cracking).
-Cov kev cai tshwj xeeb: Yuav tsum xeem dhau kev xeem xws li sulfide stress corrosion (SSC) thiab intergranular corrosion (GB/T 4334).
5. Txoj kev loj hlob ntawm cov kav dej seamless
- Cov khoom siv hloov tshiab: Kev siv cov hlau alloying siab (xws li super austenitic steel 654SMO) tuaj yeem tiv taus qhov chaw xav tau ntau dua.
-Kev tsim lub teeb: Los ntawm kev ua kom zoo ntawm phab ntsa tuab ntawm cov yeeb nkab, cov khoom siv yuav raug txo kom tsawg.
-Kev soj ntsuam ntse: Sib txuas cov khoom siv tiv thaiv corrosion los saib xyuas cov xwm txheej ntawm cov kav dej hauv lub sijhawm.
Yog li stainless hlau seamless yeeb nkab yog cov khoom tseem ceeb hauv kev lag luam petrochemical, tshwj xeeb tshaj yog irreplaceable nyob rau hauv qhov kub thiab txias, kub siab, thiab corrosive ib puag ncig. Nrog rau kev txhim kho cov txheej txheem petrochemical mus rau kev ua haujlwm siab thiab kev tiv thaiv ib puag ncig, qhov kev thov rau siab -kev ua tau zoo stainless hlau seamless kav yuav nce ntxiv. Cov neeg siv khoom yuav tsum ua tib zoo xav txog yam xws li cov yam ntxwv nruab nrab, qhov kub thiab txias, siab, thiab tus nqi thaum xaiv, thiab ua raws li cov qauv tsim nyog.
