SA 178 Qib D Boiler Tube
Sab nraud txoj kab uas hla: 12.7mm txog 127mm
Ntev: 6m -25m
Delivery condition: Annealed. Li qub. Tempered, Kev kho cua sov
SA 178 Qib D Boiler Tube Description
A178 GRD boiler raj yog ib qho hluav taws xob tiv thaiv welded carbon steel raj uas ua raws li Asmeskas cov qauv, feem ntau siv hauv boilers, kub exchangers, thiab superheaters nyob rau hauv high-temperature thiab high-pressure khoom.
SA 178 GrD ERW Boiler Tube Specification
| Txuj | A178 / SA178 ERW Carbon Steel Boiler thiab Super Heater Tubes |
| OD | 12 7-127 hli |
| WT | 0 9-9mm |
| Ntev | 6-25m |
| Khoom siv | Cov pa roj carbon |
| Hom | ERW (Electric Resistance Welded) |
| Kev xa khoom | Mob khaub thuas los yog kev kho cua sov |
| Lub sij hawm xa tuaj | 35-45 hnub tom qab tau txais 30% tso nyiaj ua ntej |
Chemical Composition ntawm ASTM A178 GrD Welded Yeeb Nkab
| Cov ntsiab lus % | Tsawg carbon steel | Nruab nrab Carbon Steel | Manganess Hlau |
| C | 0.06-0.18 | 0.35 Max | 0.27 Max |
| Mn | 0.27-0.63 | 0.80 Max | 1.00-1.50 |
| P | 0.035 | 0.035 | 0.030 |
| S | 0.035 | 0.035 | 0.015 |
| Si | ... | ... | 0.10 Min. |
ASTM A178 GrD ERW Tubing
A178 GRD welded kav tau txais kev kuaj tag nrho lub cev ultrasonic, uas feem ntau suav nrog txoj kev sib cuag ncaj qha thiab txoj kev immersion.
1. Direct Contact Method:
Lub ultrasonic sojntsuam yog coated nrog ib txheej nyias ntawm coupling tus neeg saib xyuas ntawm qhov sojntsuam thiab qhov chaw kuaj, tso cai rau kev sib cuag. Txoj kev no yooj yim rau kev khiav lag luam, tsim cov duab tshawb xyuas yooj yim, thiab yooj yim los txhais lus nrog kev paub txog qhov tsis xws luag. Nws yog txoj kev siv dav tshaj plaws hauv kev sim ua haujlwm tab sis yuav tsum muaj qhov siab ntawm qhov ntsuas qhov chaw.
2. Txoj kev immersion:
Txoj kev no suav nrog kev nkag mus rau ultrasonic sojntsuam thiab cov khoom ua haujlwm hauv cov kua ua tus neeg sawv cev sib txuas rau kev sim. Cov kua yuav yog roj lossis dej. Txoj kev immersion ntxiv yog muab faib ua tag nrho immersion thiab ib nrab immersion.
Txoj hauv kev no tsim nyog rau qhov chaw ntxhib, txo qis kev sojntsuam hnav, ua kom muaj kev sib txuas ruaj khov, muab cov txiaj ntsig zoo rov qab los ntawm kev tshawb pom, thiab ua kom muaj kev sim siab. Txawm li cas los xij, nyob rau hauv txoj kev immersion, muaj ib qho tseem ceeb attenuation ntawm lub suab tsis propagating los ntawm cov yeeb nkab phab ntsa. Ib qho kev daws teeb meem zoo dua yog siv txoj kev ua yeeb yaj kiab dej es tsis txhob muaj kev sib txuas rau lub suab sib txuas.
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ASME SA178 Kub Exchanger TubeKoj Tseem Yuav Zoo Li
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