ASTM A234 WP22 taub qab vuam lub luj tshib yog 2¼Cr-1Mo chromium-molybdenum alloy steel yeeb nkab fittings tsim los hloov cov kua dej ntws nyob rau hauv siab -kub thiab high-pressure industrial piping systems. Kev tsim kho rau qhov chaw ua haujlwm siab uas cov qauv carbon steel poob qis zog thiab oxidation tsis kam, cov luj tshib sib txuam nrog cov yeeb nkab steel hlau xws li ASTM A335 Qib P22.
Technical Specifications & Dimensional Range
|
Parameter |
Specification Paub meej |
|
Khoom Qib |
ASTM A234 / ASME SA234 WP22 (Class 1 / Chav Kawm 2 / Chav Kawm 3) |
|
Alloy Classification |
2¼Cr{2}}1Mo (Chrome-Moly Alloy Steel) |
|
Cov qauv tsim |
ASME B16.9, ASME B16.28, MSS SP-75 |
|
Qhov Loj |
Seamless: 1/2 "mus rau 24" / Welded: Mus txog 48" |
|
Phab ntsa Thickness / Teem caij |
SCH 40, SCH 80, SCH 160, XS, XXS, los yog kev cai engineered phab ntsa thickness |
|
Configurations |
45 degree, 90 degree, 180℃(Long Radius [1.5D] & luv Radius [1D]) |
|
Kev npaj kawg |
Butt-weld bevel xaus nruj me ntsis raws li ASME B16.25 |
Cov ntawv thov kev lag luam
ASTM A234 WP22 luj tshib yog engineered rau hnyav - txheej txheem ib puag ncig tuav siab thermal thiab mechanical stress:
Superheated chav kab hauv thermal fais fab nroj tsuag
High -siab hydrotreater thiab hloov kho cov chav nyob hauv cov roj refineries
Petrochemical synthesis thiab tawg reactors
High -kub siv hluav taws xob thiab kev tsim cov hlab ntsha siab
Khoom Siv Chemistry & Mechanical Performance
WP22 alloy steel yuav tsum nruj metallurgical muaj pes tsawg leeg tswj kom ntseeg tau siab - kub stability, tensile zog, thiab ntev - lub sij hawm creep kuj.
Chemical Composition Limits (%):
Cov pa roj carbon (C):0.05 – 0.15
Chromium (Cr):2.00 – 2.50
Molybdenum (Molybdenum): 0.87 – 1.13
Manganese (Mn): 0.30 – 0.60
Silicon (Si):Max 0.50
Phosphorus (P) & Sulfur (S):Max 0.040 txhua
Mechanical Properties:
Tensile zog:Min 415 MPa (60 ksi) txog 585 MPa
Yield zog:Min 205 MPa (30 ksi)
Elongation:Tsawg tshaj 20%
Hardness:Qhov siab tshaj 197 HBW (tsim rau cov ntawv thov kev pabcuam qaub thaum ua raws li NACE MR0175 cov cai)
Kev tsim khoom & Kev kho cua sov
Txhawm rau tshem tawm cov kev ntxhov siab sab hauv thiab ua tiav cov khoom siv kho tshuab, kev tsim khoom ua raws li kev tswj xyuas nruj me ntsis:
tsim
Kub los yog txias sib sau (mandrel thawb, nias, los yog forging) los ntawm kev txheeb xyuas seamless los yog welded WP22 puag Tshuag.
Kev kho cua sov
Tswj Normalizing thiab Tempering (los yog annealing / quenching thiab tempering) ua nyob rau hauv calibrated furnace batches kom ruaj ntseg cov qauv lis thiab hardness ua raws.
Beveling & Machining
Precision CNC machining ntawm weld xaus kom phim cov phab ntsa tuab hloov pauv thiab lub hauv paus ntsej muag qhov ntev ntawm ASME B16.25.
Yuav tsum tau ua pov thawj zoo & kuaj
Txhua qhov ntau lawm ua tiav kev tshuaj xyuas nruj raws li qhov project specifications thiab ASTM cov cai:
Dimensional & Geometrical Check
Kev pov thawj ntawm sab nraud txoj kab uas hla (OD), phab ntsa thickness, nruab nrab - mus rau - kawg tolerances, ovality, thiab bevel kaum.
01
Positive Material Identification (PMI)
100% XRF xeem kom paub tseeb chrome-molybdenum alloy qib kev ncaj ncees thiab tiv thaiv cov khoom sib xyaw.
02
Mechanical Testing
Kev sib tw, elongation, thiab Brinell hardness kuaj ib qho khoom cua sov / batch.
03
Tsis yog -Kev Tshawb Fawb Kev Ua Phem (NDE)
Optional Ultrasonic Testing (UT) lossis Radiographic Testing (RT) raws li qhov project thov.
04
Traceability
Tsis tu ncua tsawg- kev ntxhov siab tuag stamping ntawm txhua qhov haum qhia cov khoom siv qib, tus lej kub, qhov loj me, thiab lub sijhawm.
05
Vuam & Installation Guidelines
Raws li chrome-molybdenum alloy steel, WP22 yuav tsum tau tuav kom zoo thaum lub sij hawm kev teeb tsa kom muaj kev ncaj ncees:
Preheating
Preheating feem ntau yuav tsum tau ua ua ntej welding los tiv thaiv hydrogen -induced cracking, nyob ntawm seb lub thickness thiab carbon sib npaug.
Tshaj tawm -Kev kho cua sov (PWHT)
Welded pob qij txha feem ntau xav tau tom qab-weld kev kho cua sov kom txo cov kev ntxhov siab nyob hauv siab - kev pabcuam siab.
Phab ntsa Thickness Hloov
Xyuas kom muaj kev sib raug zoo ntawm puab diameters thiab cov sij hawm nruab nrab ntawm lub luj tshib thiab cov yeeb nkab txuas kom tsis txhob muaj kev sib tw khiav los yog cov hauv paus tsis sib haum.
Surface Protection & Ntim
Txhawm rau tiv thaiv oxidation thiab mechanical puas thaum lub sij hawm kev thauj mus los thoob ntiaj teb:
Kev kho saum npoo
Kev tua blasting ua raws li kev siv tshuaj tiv thaiv - xeb pob tshab roj txheej.
Kev Tiv Thaiv Bevel
Hnyav- lub kaus mom yas haum rau ntawm ob qhov kawg los tiv thaiv bevel npoo.
Ntim
Nthuav ntim rau hauv ISPM 15 raws li fumigated ntoo thawv los yog hnyav - lub luag hauj lwm plywood crates nrog meej sab nrauv daim ntawv lo rau qhov chaw sorting
FAQ
Q: Qhov txawv ntawm ASTM A234 WP22 Class 1 thiab Class 3 yog dab tsi?
A: Qhov sib txawv tseem ceeb nyob rau hauv lub zog tensile thiab kev kho cua sov yuav tsum tau teev tseg los ntawm ASTM A234. Chav Kawm 1 muaj qhov tsawg kawg nkaus tensile lub zog ntau yam (60 txog 85 ksi), thaum cov chav kawm siab dua yog tsim nyob rau hauv cov kev txwv tsis pub siv tshuab lossis cov txheej txheem tempering tshwj xeeb kom ua tau raws li qhov xav tau tsim siab. Cov chav kawm tiag tiag yuav tsum ua raws li qhov project tsim cov duab kos thiab cov kav dej hauv chav kawm tshwj xeeb.
Q: Puas tuaj yeem WP22 pob qij txha txuas nrog 100% Radiographic Testing (RT)?
A: Thaum cov txheej txheem tsim khoom pov thawj suav nrog kev kuaj xyuas qhov ntev, PMI, thiab kev ntsuas tshuab ib qho cua sov / batch, 100% volumetric NDE xws li Ultrasonic Testing (UT) lossis Radiographic Testing (RT) tuaj yeem ua tiav raws li qhov kev thov kom meej meej hauv daim phiaj xwm tshuaj xyuas cov neeg yuav khoom.
Q: Puas yog cov luj tshib no tau sib haum nrog ASTM A335 Qib P22 seamless kav?
A: ASTM A234 WP22 fittings yog tus tsim kev sib tw rau ASTM A335 P22 piping systems. Lawv sib koom tib yam tshuaj nominal muaj pes tsawg leeg (21/4Cr-1Mo) thiab cov yam ntxwv ntawm cov neeg kho tshuab, kom ntseeg tau tias metallurgical thiab thermal expansion compatibility thaum kub kub.
Q: Cov ntaub ntawv xeem cov ntaub ntawv twg yog muab rau txhua qhov khoom xa tuaj?
A: Txhua qhov khoom xa tuaj suav nrog Cov Ntawv Pov Thawj Cov Khoom Siv (MTC) raws li EN 10204 3.1, piav qhia txog tshuaj lom neeg muaj pes tsawg leeg kev tshuaj ntsuam xyuas, cov txiaj ntsig ntawm kev ntsuas tshuab, cov ntaub ntawv kho cua sov, thiab cov lej kub uas tuaj yeem tshawb xyuas lub cev tuag stamp ntawm txhua qhov haum.
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