ASTM A213 T11 Tubing Nkyerɛkyerɛmu - BLOG

Aguade ho nkyerɛkyerɛmu

ASTM A213 Grade T11 yɛ ferritic chromium-molybdenum (Cr-Mo) afiri a ɛnyɛ den a wɔde di dwuma wɔ nsuo a ɛyɛ hyew ne mframa a ɛyɛ hyew-mframa mu. Wɔayɛ grade no ama pressure-bearing components wɔ power boilers, HRSGs, petrochemical heaters ne high-temperature heat exchangers a carbon dade ntumi nkura oxidation resistance anaasɛ creep ahoɔden mu.
Octal Pipe de T11 ma wɔ normalized-ne-tempered tebea mu, a dimensional control, sɔhwɛ a edi mũ kɔ ASTM A213/A1016 ne mill adansedi nkrataa, enti ebetumi akɔ tẽẽ akɔ boiler ne process fabrication mu.

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

Nnuru a wɔde yɛ nneɛma

Adeɛ	Emu nsɛm (%)	Dwumadie
C	0.05 – 0.15	Ɛma ahoɔden ne creep resistance, tra weldable
Mn	0.30 – 0.60	Ductility, ɔhyew adwumayɛ
Si	0.50 – 1.00	Ɛboa oxidation a ɛko tia
P	Ennu anaasɛ ɛne 0.025 yɛ pɛ	Ɛto embrittlement ano hye
S	Ennu anaasɛ ɛne 0.025 yɛ pɛ	Wɔhyɛ so ma ɛyɛ den
Cr	1.00 – 1.50	Scaling resistance wɔ steam / flue gas mu
Mo	0.44 – 0.65	Creep ne rupture ahoɔden

Saa chromium–molybdenum kari pɛ yi sua sen T22 anaasɛ Cr grades afoforo a ɛkorɔn{1}}, ɛno nti na T11 bend na weld ntɛmntɛm, nanso ɛda so ara tra ase 500–600℃service.

Mfiri a wɔde yɛ adwuma

Agyapadeɛ	Ahwehwɛde	Botaeɛ
Ahoɔden a wɔde twetwe nneɛma	Ɛboro anaasɛ ɛne no yɛ pɛ 415 MPa (60 ksi) .	Adesoa a wɔde fa nneɛma nyinaa mu
Ahoɔden a ɛma wonya aba (0.2%) .	Ɛboro anaasɛ ɛne no yɛ pɛ 205 MPa (30 ksi) .	Siw deformation a ɛtra hɔ daa ano
Ntrɛwmu a ɛkɔ akyiri	Ɛboro anaasɛ ɛne no yɛ pɛ 30% .	Ɛho hia ma bending, coiling, welding
Nneɛma a ɛyɛ den	Ennu anaasɛ ɛne 163 HBW yɛ pɛ	Kɔ so yɛ den ma thermal cycling

Saa botaeɛ yi ne normalized-ne-tempered delivery tebea a tumi ne refinery adwuma taa kyerɛ no hyia.

Nneɛma a wɔyɛ ne ɔhyew a wɔde yɛ adwuma

Wɔ boiler tube service ho no ɔkwan no ho hia te sɛ chemistry no. Octal Pipe de ɔkwan a ɛnyɛ den di dwuma wɔ ASTM A213/A1016 ase:

alloy billet yɛ hyew-a wɔabɔ mu anaasɛ wɔayi afi mu ma ayɛ nnyigyei tokuru
tube no yɛ hyew-bobɔw anaa awɔw-twe kɔ OD a wɔahyɛ da ayɛ, ɔfasu ne soro wie (ɛho hia ma ɔhyew-exchanger tubes) .
tube no yɛ normalized wɔ bɛyɛ 940–980 digrii de siesie ferritic matrix, yi banding na equalize mfiri su wɔ tenten
wɔde tempered tube no bɛyɛ 675–755℃de san ductility na lock carbides a apete fɛfɛɛfɛ wɔ beae

Saa N+T kyinhyia yi ne nea ɛma T11 nya ne microstructure a ɛyɛ den: chromium tumi yɛ oxide film a ɛyɛ den, molybdenum tumi yɛ n’adwuma wɔ creep ahoɔden mu, na tube no nyɛ den dodo sɛ wɔbɛweld. Wɔ ɔhyew ayaresa akyi no, wɔteɛteɛ nsukorabea ahorow, wɔsɔ nsu mu hwɛ, na wɔde NDE kwan a wɔahyɛ (eddy-current anaa ultrasonic) hwehwɛ mu ansa na wɔahyɛ no agyirae na wɔde ahyɛ mu. Wɔkyerɛw anammɔn biara ma enti wotumi hwehwɛ tube no akyi kɔ ɔhyew no so.

Nsusuwii ahorow a ɛkɔ akyiri

Parameter a wɔde kyerɛ	Range / nsɛm a ɛkɔ akyiri
Abɔnten so ntwemu	12.7 – 127 mm (0.5 – 5 nsateakwaa) .
Ɔfasu no mu duru	1.2 – 12 mm
Tenten	Ɛkɔsi mita 12; SRL / DRL / twa-kɔ -tenten
End wie	Plain, beveled, anaa wɔasiesie ama U-bending / finning
OD a wɔde gyina ano	mpɛn pii no ± 1% (ASTM A1016 biara) .
Ɔfasu ho abodwokyɛre	mpɛn pii no ± 10% .
Nneɛma a ɛyɛ tẽẽ	mpɛn pii no Ennu anaasɛ ɛne 0.8 mm/m yɛ pɛ

Eyi ka boiler panel tubes a wɔtaa de di dwuma, superheater/reheater coils, ne refinery heater coils ho.

Ɔsom adwumayɛ

Wɔ adwumayɛ mu no T11 yɛ chromium-a ɛyɛ pɛ oxide, enti tube dade a ɛyera ne scale build-up yɛ brɛoo sen carbon dade. Molybdenum ma nwene ne mpaapaemu brɛ ase, na ɛno ho hia ma nsukorade a ɛtra ɔhyew ne nhyɛso ase nnɔnhwerew mpempem pii no. Esiane sɛ nhyehyɛe no yɛ tempered ferrite nti, tube no gyina start–stop cycles ano wɔ HRSGs ne cogeneration plants mu a ɛnhwere tẽẽyɛ ntɛmntɛm dodo. Welds kura mudi mu kura wɔ PWHT akyi bere a wɔde fata low-alloy filler dade di dwuma.

Nnwuma a Wɔde Di Dwuma

boiler nsu fasu, superheater, reheater ne economizer tubes a ɛwɔ thermal power plants mu
HRSG / a wɔaka abom-kyinhyia nsuo a ɛyɛ hyew
petrochemical ne refinery nhyehyɛe a wɔde yɛ ɔhyew
high-ɔhyew shell-ne-tube ɔhyew sesafo
hot utility ne process lines a ɛwɔ anyinam ahoɔden ne nnuru akuw mu

Nhwehwɛmu ne nkrataa a wɔkyerɛw

Wɔyɛ sɔhwɛ no sɛnea ASTM A213 ne A1016 ahwehwɛde ahorow no nyinaa kyerɛ. Ɛno bi ne hydrostatic anaa eddy-mprempren nhwehwɛmu a wɔyɛ ma ɔfasuo mu nnyigyei, tensile ne hardness sɔhwɛ wɔ ɔhyew-treatment lot biara mu, flattening/flaring de kyerɛ sɛ ɛyɛ ductility, ne aniwa ne dimensional nhwehwɛmu. Wɔ nnwuma a QA/QC a ɛkorɔn wom ho no, Octal Pipe betumi de ultrasonic anaa radiographic nhwehwɛmu aka ho. Wɔde EN 10204 3.1 anaa 3.2 MTCs na ɛma tubes nyinaa sɛnea ɛbɛyɛ a owura no betumi de nnuru, mfiri ne NDE aba no akɔ fael denam ɔhyew nɔma so.

Dɛn nti na wonya ASTM A213 T11 fi Octal Pipe

ankasa seamless Cr-Mo tubing wɔ normalized-ne-tempered tebea, ɛnyɛ generic carbon-dade tube kɛkɛ
nsusuwii, sɔhwɛ ne agyiraehyɛde a ɛne tumi, boiler, HRSG ne refinery nkyerɛkyerɛmu hyia
export-bundles a wɔasiesie a ɛwɔ awiei ahobammɔ ma akyirikyiri-akyirikyiri shipment
engineering mmoa a ɛbɛma T11 ne Cr-Mo grades a ɛfa ho (T22, A335 P11/P22) ahyia bere a unit koro no ara de alloys pii di dwuma
krataafa nhyehyɛe a wɔakyerɛw afiri-nea edi kan ne mfiridwuma mu pɔtee, de aboa wo sait foforo no ma wɔayɛ index sɛ adetɔnfo krataafa, ɛnyɛ nsusuwso mu nsɛm

FAQ