ASTM A387 Qib 11 Chav Kawm 2

ASTM A387 Qib 11 Chav Kawm 2https://www.chinasteelprofile.com/pressure-vessel-steel/astm-a387-grade-11-class-2-astm-a387-a387m.htmlyog ib qho chromium-molybdenum alloy steel phaj specification siv feem ntau rau welded siab hlab ntsha thiab cov khoom ua haujlwm ntawm qhov kub siab. Nws yog ib feem ntawm tsev neeg ntawm tshav kub- tiv taus qis- alloy steels, muaj nuj nqis rau nws lub peev xwm los tswj lub zog thiab tiv thaiv hydrogen nres, oxidation, thiab nkag mus rau hauv siab - kub thiab siab - siab. Cov khoom siv feem ntau yog muab nyob rau hauv qhov zoo li qub thiab tempered, uas muab qhov zoo -grained microstructure nrog zoo toughness thiab kev ruaj ntseg. Nws cov tshuaj muaj pes tsawg leeg, tshwj xeeb tshaj yog sib npaug ntawm cov chromium thiab molybdenum, muab nws txhim khu kev ruaj ntseg nyob rau hauv ib puag ncig uas muaj hydrogen, hydrocarbons, thiab lwm yam txheej txheem kua. Cov qib no feem ntau tau teev tseg rau cov cuab yeej hauv refineries, petrochemical cov nroj tsuag, thiab cov tshuab tsim hluav taws xob uas txhim khu kev qha ntev -lub sij hawm ua haujlwm nyob rau hauv thermal stress yog qhov tseem ceeb.

ua

Melting thiab Refining: Ua los ntawm hluav taws xob arc rauv los yog cov pa oxygen yooj yim rauv melting, ua raws li kev ua kom zoo dua qub (xws li ladle refining lossis nqus degassing) los tswj cov impurities thiab xyuas kom muaj tshuaj lom neeg muaj pes tsawg leeg.

Kub Rolling: Kub dov mus rau qhov tshwj xeeb tuab, nrog kev tswj cov dov tsis tau tsim kom muaj cov qauv zoo thiab cov khoom siv kho tshuab.

normalization: Ua kom sov rau qhov kub siab tshaj qhov tseem ceeb tshaj plaws thiab tuav lub sijhawm txaus rau homogenize lub microstructure, tom qab ntawd cua- txias kom ua kom cov nplej zoo dua thiab txhim kho lub zog thiab tawv.

Tempering: Rov ua kom sov kom qis dua thiab tuav rau lub sijhawm ntev, tom qab ntawd txias, kom txo cov tawv tawv, txo cov kev ntxhov siab, thiab txhim kho ductility thiab cuam tshuam.

Descaling thiab Conditioning: Nto descaling (los ntawm txhaj tshuaj blasting los yog pickling) thiab ntug trimming los yog sib tsoo kom tau raws li qhov zoo thiab qhov yuav tsum tau.

Kev tshuaj xyuas thiab kuaj: Ua raws li qhov tsis yog -kev kuaj kev puas tsuaj (ultrasonic, radiographic), kev kuaj cov cuab yeej cuab tam (tensile, impact), thiab tshuaj ntsuam xyuas kom ua tau raws li cov qauv ASTM/ASME.

daim ntawv thov

1. Kev Lag Luam Roj & Roj (Hydrogen Services)

Qhov no yog daim ntawv thov tseem ceeb tshaj plaws rau A387 Gr 11 Cl 2 vim nws tsis kam rau Hydrogen-Induced Cracking (HIC)thiab siab -Tub kub Hydrogen Attack (HTHA).

Hydrocracking thiab Hydrotreating Units:Siv nyob rau hauv reactors uas siab - siab hydrogen ua tiav ntawm qhov kub thiab txias.

Khoom siv Sour Service:Zoo tagnrho rau ib puag ncig uas muaj 𝐻2𝑆 (hydrogen sulfide) vim nws cov ntsiab lus chromium thiab molybdenum.

Separators thiab Presses Vessels:Siv nyob rau hauv upstream thiab downstream ua kom tiv taus corrosive crude roj Cheebtsam.

2. Kev tsim hluav taws xob

Cov ntaub ntawv zoo heev creep- tawg lub zog(kev ruaj ntseg nyob rau hauv ntev -lub sij hawm siab ntxhov siab thiab kub) ua rau nws ib tug qauv rau fais fab nroj tsuag.

Siab -Lub Boiler Drums:Siv kom muaj cov siab - siab zog ua ntej nws yuav raug xa mus rau turbines.

Thaum tshav kub kub Exchangers:Tshwj xeeb tshaj yog rau lub plhaub - thiab - tube exchangers tuav siab - cov kua dej kub.

Steam Piping thiab Headers:Cov kab tseem ceeb uas ua haujlwm hauv 350℃txog 500℃ntau.

3. Kev ua Petrochemical

Fractionation Kem:Siv nyob rau hauv thermal cracking thiab distillation ntawm tshuaj feedstocks.

Ammonia Converters:Siv nyob rau hauv synthesis ntawm nitrogen-raws li chiv nyob qhov twg kub thiab siab yuav tsum tau.

Lub nkoj Reactor:Loj - cov tshuaj reactors uas xav tau lub zog tensile siab dua muab los ntawm Chav Kawm 2 (raws li tsis yog Chav Kawm 1).

4. Heavy Industrial Manufacturing

Fabricated Flanges thiab Fittings:Siv rau kev sib txuas siab - cov kav dej siab hauv cov chaw ua haujlwm.

Liner Phaj:Nyob rau hauv tshwj xeeb machinery uas yuav tsum tau ob qho tib si tshav kub kuj thiab nruab nrab hnav tsis kam.

Hu rau tam sim no

Yog tias koj muaj qhov xav tau ntawm qhov project A387 Gr.11 CL.2 , peb txais tos koj nug. GNEE tuav cov khoom lag luam loj uas feem ntau siv cov qib siab zog steel rau koj xaiv.Rau cov ncauj lus kom ntxaws txhua yam khoom, tshuaj lom neeg muaj pes tsawg leeg, thiab cov ntaub ntawv kev, nrog rau cov qauv dawb, thov hu rau peb lub Hoobkas tam sim ntawd. Peb muab cov nqi sib tw, ruaj khov zoo, thiab kev pabcuam tshaj lij. Email: beam@gneesteelgroup.com.

Lub thermal conductivity ntawm A387 Gr 11 CL 2 yog dab tsi?

Ntawm 20℃(68℃F), thermal conductivity yog hais txog 42 W / (m·K), txo qis me ntsis nrog nce kub, haum rau kev siv cua sov.

Dab tsi yog qhov coefficient ntawm thermal expansion ntawm A387 Gr 11 CL 2?

Los ntawm 20℃mus rau 500 degree, nws yog kwv yees li 12.5 × 10⁻⁶/degree, tseem ceeb rau thermal stress xam nyob rau hauv siab - cov khoom kub.

A387 Gr 11 CL 2 yog dab tsi?

Nws yog ib qho qis- alloy chromium-molybdenum steel phaj, feem ntau yog siv rau cov hlab ntsha hauv siab - kub thiab corrosive ib puag ncig, nrog rau cov cua sov zoo thiab weldability.

Puas yog A387 Gr 11 CL 2 haum rau kev pabcuam hydrogen?

Yog, nws yog dav siv nyob rau hauv hydrogen kev pab cuam (xws li, hydrocracking units) vim nws tsis kam mus rau hydrogen embrittlement ntawm kub kub thiab siab.

Dab tsi ncej-weld kev kho cua sov (PWHT) yuav tsum tau rau A387 Gr 11 CL 2?

Hom PWHT: Tempering ntawm 620-677℃(1150-1250℃F) rau lub sijhawm txaus, txo qhov kev ntxhov siab ntawm vuam thiab txhim kho toughness.

A387 Gr 11 CL 2 puas tuaj yeem ua haujlwm tsis muaj tempering?

Tsis yog, tempering tom qab normalizing yog qhov yuav tsum tau txo qis hardness, txo kev ntxhov siab, thiab txhim kho toughness, ua tau raws li ASTM A387 cov cai.

Qhov txawv ntawm A387 Gr 11 thiab Gr 22 yog dab tsi?

Gr 22 muaj ntau dua Mo cov ntsiab lus (2.25%), zoo dua siab -kub creep resistance, thaum Gr 11 yog tus nqi-zoo rau nruab nrab-kub siv.

Dab tsi yog qhov txawv ntawm A387 Gr 11 CL 1 thiab CL 2?

CL 2 muaj kev nruj dua qhov yuav tsum tau ua kom tawv nqaij (Charpy V-notch) dua li CL 1, haum rau qis dua - kub lossis xav tau ntau lub nkoj siab.

Dab tsi yuav tsum tau ua raws li cov qauv rau vuam A387 Gr 11 CL 2?

Ua raws li AWS D1.1/D1.1M (Structural Welding Code) thiab ASME BPVC Section IX, xaiv qhov sib txuam Cr-Mo electrodes rau weld joint zog.