Txheej txheem cej luam ntawm Cryogenic nickel daim hlau
Cryogenic npib tsib xee daim hlau zoo heev haum rau cov ntawv thov raug rau qhov kub tsis tshua muaj siab. Lawv yog siv rau kev thauj cov roj liquefied natural gas (LNG) thiab liquefied petroleum gas (LPG).
A 645 Gr A / A 645 Gr B, txo nqi thiab nce kev nyab xeeb hauv ethylene thiab LNG tank tsim.
Lub xeev-of-the-art ntau lawm chaw ua rau nws muaj peev xwm rau peb tsim tau ob qho tib si steel qib A 645 Gr A thiab Gr B nrog rau cov pa 5% thiab 9% nickel steels.
● LNG
Cov roj ntsha ntuj yog liquefied ntawm qhov kub tsis tshua muaj siab ntawm -164 ° C, txo nws qhov ntim los ntawm qhov zoo ntawm 600. Qhov no ua rau nws khaws cia thiab thauj tau thiab kev lag luam zoo. Ntawm qhov kub thiab txias no, kev siv tshwj xeeb 9% npib tsib xee steels yog tsim nyog thiaj li yuav lav txaus ductility thiab tiv thaiv nkig tawg. Peb muab cov phaj dav ntxiv rau ntu kev lag luam no, txawm tias nyob rau hauv thicknesses txog 5 hli.
● LPG
Cov txheej txheem LPG yog siv los tsim cov propane thiab cov txheej txheem roj los ntawm cov pa roj. Cov roj no yog liquefied ntawm chav tsev kub ntawm qhov tsis tshua muaj siab thiab khaws cia rau hauv cov tso tsheb hlau luam tshwj xeeb ua los ntawm 5% nickel steels. Peb muab cov phaj plhaub, taub hau thiab cones los ntawm ib qhov chaw.
Siv ASTM A 645 Gr B Phaj Piv txwv
● Kev siv A 645 Gr A rau kev tsim cov ethylene tso tsheb hlau luam muab kwv yees li 15% lub zog siab dua, muaj kev nyab xeeb thiab muaj peev xwm txo cov phab ntsa tuab kom txuag tau nyiaj ntau hauv kev tsim kho lub tank.
● ASTM A 645 Gr B ua tiav cov khoom siv sib npaug ntawm cov tsoos 9% nickel steels hauv LNG cia tab sis ua tau raws li cov kev cai no nrog kwv yees li 30% qis nickel cov ntsiab lus. Ib qho txiaj ntsig ntxiv yog txo tus nqi ntau hauv kev tsim cov onshore thiab offshore LNG tso tsheb hlau luam thiab hauv kev tsim cov roj tso tsheb hlau luam LNG.
Qhov zoo tshaj plaws rau qib siab tshaj plaws ntawm kev ruaj ntseg
Lub hauv paus ntawm peb cov ntawv zoo nickel yog cov purity siab slabs los ntawm peb tus kheej steelmaking cog. Cov ntsiab lus carbon tsawg heev guarantees zoo meej weldability. Ntxiv qhov zoo yog pom nyob rau hauv cov khoom zoo heev cuam tshuam lub zog thiab cov khoom tawg (CTOD). Tag nrho cov phaj saum npoo tau kuaj xyuas ultrasonic. Cov hlau nplaum residual yog qis dua 50 Gauss.
Preprocessing kom tau raws li cov neeg siv khoom tshwj xeeb
● Sand-blasted los yog xuab zeb-blasted thiab primed.
● Kev npaj ntawm welded npoo: Tsawg hardening ntawm qhov kub hnyiab tau ua tau los ntawm cov ntsiab lus carbon tsawg.
● Phaj dabtsi yog khoov.
Hlau Qib ntawm Cryogenic Nickel Phaj Jindalai tuaj yeem muab khoom
Steel pawg | Steel qib standard | Cov qib steel |
5% npib tsib xee hlau | TS EN 10028-4 / ASTM / ASME 645 | X12Ni5 A/SA 645 Qib A |
5.5% nickel hlau | ASTM / ASME 645 | A/SA 645 Qib B |
9% nickel hlau | TS EN 10028-4 / ASTM / ASME 553 | X7Ni9 A/SA 553 Type 1 |