1. Tus Qauv: EN 10217-3
Nws lub npe tag nrho yog:"Welded steel raj rau lub hom phiaj siab - Kev xa tawm cov xwm txheej - Ntu 3: Alloy fine grain steel tubes."
Scope:Nws npogseamless thiab weldedcov raj (txawm tias lub ntsiab lus tseem ceeb) ua los ntawm weldablezoo grain alloy steels.
Cov yam ntxwv tseem ceeb:Cov hlau yog tsim los rau kev pabcuam kub siab. Lawv cov ntsiab lus alloying (xws li Molybdenum, Chromium) txhim kho lub zog ntawm qhov kub thiab txias tsis kam.
Yam yuav tsum tau muaj:Nws qhia txog cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab (yield zog, tensile lub zog), tsis yog -kev kuaj kev puas tsuaj (NDT), kev sim hydrostatic, thiab cov txheej txheem tshuaj xyuas.
2. Khoom siv thiab "Boiler Steel"
Cov ntsiab lus carbon steel:Raws li EN 10217-3, "carbon steel" feem ntau yog hais txogqis- hlau alloysqhov twg lub ntsiab alloying tseem yog carbon, tab sis nrog me me, tseem ceeb ntxiv ntawm cov ntsiab lus zoo liMolybdenum (hli). Ib qho piv txwv classic yogP265GH(zoo ib yam li AISI 4140 tab sis rau cov hlab), uas muaj ~ 0.2% Carbon thiab Molybdenum.
Vim li cas rau Boilers?Cov hlau no muab:
Siab -Tsub Muaj Zog: Resist deformation (creep) under high pressure and temperature (>350 degree).
Zoo Weldability:Qhov tseem ceeb rau kev tsim cov tshuab boiler.
Toughness thiab Durability:Txhawm rau tswj cov thermal cycling thiab kev ntxhov siab sab hauv.
3. Cov Qib Siab Cov Hlau raws li EN 10217-3 rau kev siv boiler
Cov qhab nia feem ntau tau teev tseg yog:
P265GH:Feem ntau yog rau qis rau nruab nrab kub boiler seem (economizers, dej phab ntsa).
P295GH / P355GH:Cov qib siab zog rau cov kav dej loj thiab cov taub hau.
16 hmo 3:Muaj ~ 0.3% Molybdenum, zoo heev rau siab - kev pabcuam kub txog li 525℃(piv txwv li, superheater tubes).
14MOV 6-3:Muaj Molybdenum thiab Vanadium rau kev nkag siab ntau dua.
4. Cov txheej txheem tsim khoom
Tubes raws li EN 10217-3 tuaj yeem ua los ntawm:
Seamless (S):Kub tiav los yog txias kos. Txaus siab rau kev kub siab heev.
Welded (W):Feem ntau longitudinally welded los ntawm SAW (Submerged Arc Vuam) los yog HF (High Frequency). Lub weld seam raug kuaj tag nrho thiab cua sov- kho kom haum rau lub hauv paus hlau.
5. Kev Ntsuas & Kev Ntsuam Xyuas (raws li tus qauv)
Hydrostatic Test:Txhua lub raj yog sim ntawm lub siab xam los ntawm nws qhov ntev thiab cov khoom siv zog.
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT):Tag Nrho -Length testing ntawm weld seam (rau welded raj) los yog tag nrho cov raj (rau seamless) los ntawm ultrasonic los yog eddy tam sim no.
Mechanical Tests:Tensile, flattening, khoov, los yog kev ntsuam xyuas ntawm cov qauv ntawm batch.
Visual Inspection & Dimensional Checks.
6. Sib piv nrog Lwm Cov Qauv
ASTM A192 / A210 Cov Lus Qhia:Common US specs rau siab - siab boiler raj (seamless carbon steel).
ASTM A178 / A214 Cov Lus Qhia:Rau welded boiler thiab cua sov-exchanger raj.
TS EN 10216-2:Tus qauv rauseamlesssiab thiab mechanical raj, uas suav nrog cov qib zoo sib xws. Qhov kev xaiv ntawm EN 10216-2 (seamless) thiab EN 10217-3 (welded) feem ntau yog nyob ntawm tus qauv tsim, tus nqi, thiab muaj.
Tej kev siv
Chaw nres tsheb fais fab boilers:Cov phab ntsa dej, superheaters, reheaters, economizers, headers, thiab cov kab tseem ceeb.
Muaj boilers:Siab - cov txheej txheem ua kom muaj zog.
Thaum tshav kub kub Exchangers & Pressure Vesselsnyob rau hauv chemical / petrochemical nroj tsuag.
Tseem ceeb Specification nyob rau hauv ib qho kev txiav txim
Thaum txiav txim, koj yuav tsum qhia kom meej lub npe tag, piv txwv li:
Tube EN 10217-3 - P265GH - 219.1 x 20.0 - W - +N
Txheem:TS EN 10217-3
Qib:P265GH
Loj:219.1 hli OD x 20.0 hli phab ntsa thickness
Kev tsim khoom:W (welded)
Qhov xwm txheej:+N (Normalized lossis normalized dov - yuav tsum tau ua rau cov qib no kom ua tiav cov qauv zoo)
Cov ntsiab lus
TS EN 10217-3 Carbon Steel Boiler Yeeb Nkabhais txogsiab-zoo, welded los yog seamless, zoo-grained qis- alloy steel hlab. Lawv tau tsim tshwj xeeb, tsim khoom, thiab kuaj kom muaj kev nyab xeeb muaj siab -siab chav dej lossis dej kub hauv boiler thiab cov hlab ntsha siab. Lawv lub ntsiab feature yog lawvguaranteed kev ua tau zoo ntawm qhov kub thiab txias, ua rau lawv muaj kev nyab xeeb tseem ceeb hauv kev tsim hluav taws xob thiab kev lag luam cua sov.
