ASTM A213 T11 Tubing Specification - BLOG

Diskripsen bilong prodak

ASTM A213 Gret T11 em i wanpela 'seamless ferritic chromium-molybdenum (Cr-Mo) tube we ol i save yusim long hot stim na 'flue-gas envairomen. Dispela gret em ol i wokim bilong ol presa-bearing komponen insait long ol pawa boiler, HRSG, petrokemikel hita na ol hai-temperature hit eksenja we kabon stiel i no inap holim oksidesen resistens o krip strong.
Octal Pipe i save saplaim T11 long nomol-na-kondisen, wantaim 'dimensional control', ful tes i go long ASTM A213/A1016 na ol setifiket bilong 'mill', olsem na em i ken go stret long 'boiler' na 'process fabrication'.

astm a213 t11 tubing bundles for boiler and superheater service - octal pipe

Kemikel komposisen

Elemen	Kenten (%)	Wok
C	0.05 – 0.15	Em i givim strong na strong bilong sakim wara, na i no inap long weldim
Mn	0.30 – 0.60	Ductility, hot workability
Si	0.50 – 1.00	Sapotim oksidesen resistans
P	Liklik o wankain olsem 0.025	I daunim 'embrittlement'
S	Liklik o wankain olsem 0.025	Ol i bosim strong bilong en
Cr	1.00 – 1.50	Skeling resistans insait long stim / ges bilong paia
Mo	0.44 – 0.65	Strong bilong kru na bruk

Dispela 'chromium-molybdenum balance' i liklik long T22 o ol narapela 'Cr gred' we i antap moa, na dispela i as na T11 i save ben na weld isi moa, tasol em i save stap yet long 500-600 digri sevis.

Ol samting bilong masin

Banis	Samting yu mas mekim	As tingting
Strong bilong holim	Bikpela o wankain olsem 415 MPa (60 ksi)	Olgeta lod kapasiti
Strong bilong kaikai (0.2%)	Bikpela o wankain olsem 205 MPa (30 ksi)	I stopim bagarap i stap oltaim
Longpela	Bikpela o wankain olsem 30%	Em i nidim long bendim, koilim, weldim
Hatnes	Liklik o wankain olsem 163 HBW	I holim strong bilong 'thermal cycling'

Ol dispela veliu i wankain olsem 'normalized-na-tempered delivery kondisen we ol pawa na rifaineri projek i save makim.

Wok bilong wokim na hat tritmen

Long sevis bilong 'boiler tube' rot i bikpela samting wankain olsem kemistri. Octal Pipe i yusim wanpela gutpela rot aninit long ASTM A213/A1016:

'alloy billet' em i hot - na ol i sutim o rausim long kamapim wanpela 'sound hollow'
'tube' em i hot-rolim o kol-pulim i go long OD, wol na pes pinis (em i bikpela samting long ol 'heat-exchanger tubes)
ol i mekim 'tube' i kamap wankain long 940-980 digri long stretim 'ferritic matrix', rausim 'banding' na mekim ol 'mechanical properties' i wankain longpela bilong en
ol i save tanim paip long 675-755 digri long stretim bek na pasim gutpela 'dispersion' bilong ol 'carbides' long ples bilong en

Dispela N+T saikel em i samting we i givim T11 gutpela 'microstructure' bilong en: 'chromium' inap long wokim wanpela 'tight oxide film', 'molybdenum' inap long mekim wok bilong en long strongim 'creep', na 'tube' i no inap kamap hat tumas long weldim. Bihain long hat tritmen, ol i stretim ol paip, testim long 'hydrostatic', na sekim long NDE rot (eddy-current o ultrasonic) pastaim long ol i makim na putim long paket. Ol i save rekodim olgeta step bai ol i ken bihainim 'tube' i go bek long hat.

Dimensenel ranj

Paramita	Namba / ditel
Diamita bilong ausait	12.7 – 127 mm (0.5 – 5 in)
Tiknes bilong wol	1.2 – 12 mm
Longpela	Inap long 12 mita; SRL / DRL / katim-long-longpela
Pinis pinis	Klin, bevel, o redi long U-bending / fining
OD tolerans	planti taim ± 1% (long ASTM A1016)
Wol tolerans	planti taim ± 10%
Stretpela	planti taim liklik o wankain olsem 0.8 mm/m

Dispela i karamapim ol komon boila panel paip, ol supahita/rihita koil, na ol rifaineri hita koil.

Pefomens bilong sevis

Long wok T11 i kamapim wanpela wankain 'chromium-rich oxide, olsem na 'tube metal loss' na 'scale build-up i isi moa long kabon steel. Molybdenum i save daunim 'creep' na 'rupture', we em i bikpela samting long ol 'tube' we i save stap aninit long tempereja na presa inap planti tausen aua. Bikos straksa em i 'tempered ferrite', dispela 'tube' i save karim ol 'start-stop cycles' insait long ol HRSG na ol 'cogeneration plants' na i no save lusim stretpela bilong en hariap tumas. Ol weld i save stap gut bihain long PWHT taim ol i yusim ol kwalifait low-alloy filler metals.

Ol aplikesen

warawol bilong boila, supahita, rihita na ekonomisa paip insait long ol 'thermal power plant'
HRSG / kombined-saikel stim jenereta
petrokemikel na rifaineri proses hita
ol 'high-temperature shell-na-tube heat exchanger
ol hot yutiliti na proses lain insait long ol pawa na kemikel yunit

Inspeksen na ol pepa

Ol i mekim wok painimaut bihainim ASTM A213 na ol jeneral A1016 rikwaemen. Dispela i inkludim 'hydrostatic' o 'eddy-'karent' eksaminesen bilong 'wall soundness', 'tensile' na 'hardness' tes long wanwan 'heat-treatmen lot, 'flattening/flaring' long soim olsem 'ductility', na tu 'visual' na 'dimensional' inspeksen. Long ol projek we i gat bikpela QA/QC, Octal Pipe i ken putim ol 'ultrasonic' o 'radiographic' sekim. Olgeta paip i gat EN 10204 3.1 o 3.2 MTCs olsem na papa bilong en i ken putim ol kemikel, mekanik na NDE risal long namba bilong hat.

Bilong wanem kisim ASTM A213 T11 long Octal Pipe

trupela 'seamless Cr-Mo tubing i stap long nomol-na-tempered kondisen, i no jenerik kabon-steel tube tasol
ol mak, ol tes na mak i stret wantaim pawa, boila, HRSG na ol spesifikesen bilong rifaineri
ekspot-redi bandel wantaim end proteksen bilong longpela-distens sipmen
sapot bilong enjiniaring long makim T11 wantaim ol Cr-Mo gred (T22, A335 P11/P22) taim wankain yunit i yusim planti aloi
pes straksa raitim prodak-pastaim na teknikel spesifik, long helpim nupela sait bilong yu long kisim indeks olsem wanpela saplaia pes, i no templet konten

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