Cov ntawv thov P22 Cov Kav P22 Cov Pipes Hydrogenation Hydrogenation Hydrogenation Hydrogenation Hydrogenation?
Kev ua haujlwm ntawm hydrogenation reactors nce mus txog 400-500 lub zog ntawm P22 tuaj yeem tiv taus hydrogen ib nrab ntawm siab lossis sib luag rau 15mpa. Nws txoj kev tawm tsam rau hydrogen-inducts cracking (hic) zoo dua li cov tshuaj carbon, txo qhov kev pheej hmoo ntawm cov khoom tsis ua haujlwm. Nws feem ntau siv nyob rau hauv qhov tseem ceeb xws li Reactor Inlet kav thiab cua sov raj. Cov rooj plaub qhia tau tias lub neej pabcuam ntawm lub tshuab hluav taws xob tau txuas ntxiv mus rau 15 xyoo tom qab siv P22 kav (Carbon Steel tsuas yog 5 xyoos). Ib txwm tuab kho cov tshuaj xyuas thiab hydrogen flux kuaj yog xav tau thaum lub sijhawm tsim.
Vim li cas P22 cov khoom siv feem ntau siv rau kev tawg rauv leeg?
Kev ua haujlwm ntawm qhov kub ntawm cov tawg tawg yog siab li 800-900 degree. Lub chromium-molybdenum Cheebtsam ntawm P22 tuaj yeem tiv thaiv carburization thiab oxidation thaum ethylene tawg. Nws lub zog nkag dag zog zog tseem nyob saum 100MPA ntawm 600 degree. Lub Rauv Rauve tsim kev siv centrifugal casting p22 (ASTM A608) txhawm rau txhim kho cov rog rog tsis kam. Hauv cov ntawv thov tiag tiag, Chav txhaj tshuaj yuav tsum ua kom qeeb Coking. Kev soj ntsuam tsis ua tiav tau qhia tau tias qhov hloov nruab nrab ntawm P22 rauv leeg yog 70,000-100,000 teev sijhawm.
Dab tsi yog cov ntawv thov raug cai ntawm P22 Cov kav hlau ua haujlwm hauv thee kev lag luam thee?
Lub raj xa hluav taws xob syngas (muaj h 2+ co) ntawm chav ntsuas pa roj av kom muaj P22 kom tiv thaiv kev kub ntxhov. Vim tias cov dej-ntxaij slurry conveying yeeb nkab muaj cl- thiab cov khoom siv, cov coj tsis kam ntawm P22 yog qhov zoo dua li ntawm cov hlau tsis muaj roj stainless. Ib qho kev siv IGCC tau siv P22 raws li lub plhaub cov khoom ntawm qhov kub thiab kub-ya lim. Nyob rau hauv methanol synthesis txuas, P22 Cov Tub Rog P22 P22 tuaj yeem tiv nrog cov mob hnyav ntawm 250℃/ 8MPA. Kev saib xyuas yuav tsum tau them rau qhov muaj peev xwm cuam tshuam ntawm cyanide hauv cov tshuaj thee hauv thee ntawm P22 kev nyuaj siab corrosion.
Vim li cas outshore platforms siv P22 Cov kav Pipes P22 Cov Kav Hlau Kev Txhaj Tshuaj Ntau Tshaj Plaws?
Lub hiav txwv txhaj tshuaj lub siab feem ntau tau tshaj 20mpa, thiab cov txiaj ntsig ib lub zog ntawm P22 (ntau dua lossis sib npaug ntawm 205mpa) ua tau raws li API 6A cov lus qhia. Nws lub Seasater cov tshuaj tiv thaiv corrosion tuaj yeem txhim kho ntxiv los ntawm kev tiv thaiv Cathodic + txheej. Cov ntaub ntawv qhia tau tias P22 raj ntawm p22 ntawm lub platform hauv hiav txwv hauv hiav txwv tau txais kev pabcuam rau 12 xyoo yam tsis muaj phab ntsa tuab. Piv nrog Duplex Stainless hlau, P22 muaj 40% tus nqi qis dua thiab cov qauv vuam ntxiv. Yuav tsum tau ua haujlwm tu kom tu tau los tiv thaiv microbial corrosion (mic).
Yuav ua li cas yog daim ntawv thov kev txwv ntawm P22 Cov Kav Hlau hauv Lng tau txais chaw nres tsheb?
Nyob rau hauv tsawg zaus puag ncig (<-50°C), the toughness of P22 drops sharply and is not suitable for LNG main process pipelines. However, it can be used for normal temperature and high pressure pipelines (≤-20°C) at the outlet of BOG compressors. Special attention should be paid to the supplementary requirements for low temperature impact tests (such as ASTM A333 Appendix A6). A project once caused a pipeline cold cracking accident due to the failure to perform a low temperature Charpy test. If it must be used, it is recommended to conduct an impact verification at -46°C and limit the operating pressure.
