ASTM A335 P22 Pipe Nkyerɛkyerɛmu (Chrome Moly Pipe) - BLOG

Engineering Ho Nsɛm a Wɔakyerɛw

Wɔ Cr-Mo dade a wɔde afrafra nyinaa mu no, .ASTM A335 Nkyekyɛmu P22gyina hɔ ma ano aduru a ɛyɛ adwuma pii sen biara no mu biako mahigh-nhyɛso ne ɔhyew a ɛkorɔn-ɔhyew nsu afiri.
Ɛka bom2.25% na ɛyɛ chromiumne1% na ɛyɛ molybdenum, a ɛyɛ alloy matrix a etumi ko tia creep, oxidation, ne carburization bere a wɔde ahyɛ mu bere tenten wɔ ɔhyew a ɛkɔ soro kodu620 digrii (1150 digrii F) ..

Saa nsɛm yi fi bere tenten ayɛ nea...adwuma pɔnkɔ a wɔyɛ anyinam ahoɔden, adwumayɛbea a wɔde yɛ nneɛma foforo, ne petrochemical piping nhyehyɛe ahorow, a ɛma adwumayɛ mu nsonsonoe a ɛda grades a ɛba fam te sɛ P11 ne advanced ferritic-martensitic alloys te sɛ P91 ntam no ano.
Ne kari pɛ wɔ mfiridwuma mu ahotoso, fabricability, ne bere tenten-bere pintinn ma ɛyɛ nea eye masteam headers, reheater tubes, ne nhama a ɛkɔ soro-ɔhyew a wɔde kɔ baabi foforo.

Alloy Design ne Metallurgical Mfitiaseɛ

Grade P22 yɛ nea ɛwɔ...ferritic–wɔn a wɔn bo afuw kuwa wɔde dade ayɛ. Ne dwumadi fi microstructure a wɔayɛ no pɛpɛɛpɛ a wɔdeferrite a wɔahyɛ no den ne chromium–molybdenum carbides a ɛyɛ den (M23C3, M2C) ..

Alloy Element a Wɔde Yɛ Nneɛma	Emu nsɛm (%)	Dwuma a Edi wɔ Adwumayɛ mu
Cr (Kromium) .	1.90 – 2.60	Ɛyɛ oxide layer a ɛbɔ ho ban na ɛma scaling resistance tu mpɔn
Mo (Molybdenum) .	0.87 – 1.13	Ɛma solid-solution ahoɔden ne creep resistance
C (Carbon) .	0.05 – 0.15	Di hardness ne ductility kari pɛ so
Mn (Manganese) .	0.30 – 0.60	Ɛma weldability ne toughness tu mpɔn
Si (Silicon) .	0.50 – 1.00	Ɛma oxidation ne corrosion a ɛko tia no yɛ kɛse
P / S	Ennu anaasɛ ɛne 0.025 yɛ pɛ	Ɛma ductility kɔ so na esiw aburow hye a ɛyɛ brittleness ano

Saa dade nhyehyɛe yi hwɛ hu sɛ:

Ferrite-carbide microstructure a ɛyɛ dena ɛko tia coarsening wɔ ɔhyew adesoa ase.
Creep-rupture a ɛyɛ denbɛboro nnɔnhwerew 100,000 a wɔde yɛ ɔsom adwuma wɔ digrii 540–600 .
Weld mudi mu kura a ɛkyɛn sobere a post-weld ɔhyew-ayɛ (PWHT).
Oxidation scaling a wɔahyɛ so, a ɛtew tube no ani a ɛyɛ mmerɛw ne dade a wɔsɛe no so.

Mfiri a Wɔde Di Dwuma ne Ɔhyew a Ɛko Tia

Agyapadeɛ	Ahwehwɛde	Engineering Botae a Wɔde Yɛ Adwuma
Ahoɔden a Wɔde Tensile	Ɛboro anaasɛ ɛne no yɛ pɛ 415 MPa (60 ksi) .	Ogyina bere tenten-axial stress ano
Aba Ahoɔden a Wɔde Ma	Ɛboro anaasɛ ɛne no yɛ pɛ 205 MPa (30 ksi) .	Siw plastic a ɛbɛsakra no ano
Ntrɛwmu a ɛkɔ akyiri	Ɛboro anaasɛ ɛyɛ pɛ 30 % .	Ɛma fabrication ductility yɛ adwuma
Nneɛma a ɛyɛ den	Ennu anaasɛ ɛne 163 HBW yɛ pɛ	Ɛhwɛ hu sɛ weld no yɛ den na ɛko tia ɔbrɛ

Wɔ ɔhyew a ɛkɔ soro mu no, P22 kura acreep-rupture ahoɔden a ɛboro 60 MPa wɔ 600 degree, a ɛkura ne nsusuwii ne ne mudi mu kura wɔ nhyɛso ne wosow a ɛkɔ so kyinhyia mpo ase.

Mfiridwuma a Wɔde Yɛ Nneɛma ne Ɔhyew a Wɔde Yɛ Adwuma

Nea ɛnte sɛ dade a carbon a ɛba fam no, P22 hwehwɛ sɛ wɔyɛ no pɛpɛɛpɛɔhyew–mfiri a wɔde di dwumawɔ nneɛma a wɔyɛ nyinaa mu.
Octal Pipe de advanced seamless forming akwan a wɔaka abom nemulti-stage ɔhyew ayaresasɛnea ɛbɛyɛ a wɔbɛhwɛ ahu sɛ dade yɛ pɛ na ne nsusuwii yɛ pɛpɛɛpɛ.

Ɔkwan a Wɔfa so Yɛ Nneɛma:

Billet Piercing & Ɔhyew a Wɔyɛ– Wɔde rotary extrusion na ɛbɔ Cr-Mo billets wɔ 1100–1150 degree.
Awɔw mu Mfonini / Hot Rolling– Ɛsiesie aburow kɛse ne ɔfasu a ɛyɛ pɛ.
Nneɛma a wɔde yɛ ade daa (940–980 digrii ) .– Ɛsiesie ferritic aburow na ɛpete carbides a wɔatew mu.
Tempering (675–760 digrii ) .– Ɛma emu nhyɛso fi hɔ, ɛsan de ductility ba, na ɛma carbides gyina pintinn.
Hydrostatic / Ultrasonic Sɔhwɛ a Wɔyɛ– Validates nhyɛso tumi ne structure soundness.

Nodual-stage ɔhyew ayaresa(normalize + abufuw) yɛ nea ɛho hia kɛse. Ɛma ferrite matrix a ɛyɛ fɛ-grained, tempered a ɛko tia embrittlement, ɛma weld ductility kɔ so, na ɛma creep adwumayɛ a wotumi hyɛ ho nkɔm wɔ mfe du du pii a wɔde ayɛ adwuma mu.

Nsusuwii a Wɔde Di Dwuma

Parameter a wɔde kyerɛ	Dodoɔ
Akyi Ntrɛwmu	1⁄2′′ – 24′′ (12.7 – 610 mm) na ɛwɔ hɔ.
Ɔfasu a Ɛyɛ Den	1.2 – 100 mm
Tenten	Ɛkɔ soro kodu mita 12 (SRL/DRL/amane kwan so) .
Nneɛma a ɛyɛ tẽẽ	Ennu anaasɛ ɛne 0.8 mm / m yɛ pɛ
End Type	Beveled / Plain / Nhama a wɔde ayɛ

Amanne kwan so fabrication te sɛU-bends, spools, ne header nhyiam ahorowwɔ hɔ bere a wɔabisa sɛ wɔmfa ahoɔden a wɔde yɛ ɔhyew ne nhyehyɛe a wɔde yɛ nneɛma a wɔde yɛ nneɛma foforo.

Adwumayɛ a Wɔyɛ Wɔ Ɔhyew a Ɛkɔ Anim Ase

Wɔ adwumayɛ tebea horow a ɛboro digrii 550 mu no , P22 yɛ aCr2O3 oxide a ɛyɛ dena ɛbata dade a ɛwɔ ase no ho, na esiw spallalation ne dade a ɛyera ano.
Saa sini yi yɛ adwuma sɛ aself-ayaresa akwanside, a ɛma ɔhyew a ɛkɔ baabi foforo no kɔ so yiye na ɛyɛ mmerɛw wɔ soro wɔ bere tenten a wɔde hyɛ mu no nyinaa mu.

Adwumayɛ ho su atitiriw:

Ahoɔden a Ɛkorɔn a Ɛwɔ Creep:Stable wɔ adesoa a ɛkɔ so ne nhyɛso cycling ase.
Ɔbrɛ a Ɛko Tia Ɔhyew:Fine-grained matrix siw mpaapaemu wɔ ntrɛwmu kyinhyia ase.
Nsusuwii mu Gyinabea:Ɔhyew a ɛba fam ntrɛwmu hwɛ hu sɛ weld alignment daa.
Weld Adwumayɛ:PWHT san ma ductility ba na eyi nhyɛso a aka no fi hɔ.
Oxidation a Ɛko Tia:Ahobammɔ a wotumi de ho to so kosi digrii 620 , a ɛtrɛw bere a wɔde hwɛ nneɛma mu.

Mfiridwuma mu Nneɛma a Wɔde Di Dwuma

ASTM A335 P22 alloy pipe no yɛ nea wɔde di dwuma kɛse wɔahoɔden a wɔde yɛ adwuma, nnuru a wɔde yɛ pɛtro, nea wɔde tew nneɛma hosectors, titiriw wɔsuperheater, reheater, ne nhyɛsoɔ kɛseɛ -nhyɛsoɔ feedwater circuits.

Ananmusifoɔ Akwankyerɛ:

Boiler & Reheater Tubing a wɔde yɛ nneɛmama subcritical ne supercritical unit ahorow no.
Process Steam Nsɛmti a Wɔde Di Dwumanesikasɛm ho animdefowɔ anyinam ahoɔden mfiri ahorow mu.
Refinery ne Petrochemical Fononoo a Wɔde Yɛ Nneɛmabaabi a mframa a ɛma carburizing ne oxidizing bom tra.
Ɔhyew Sesa Nneɛma a Wɔde Sesa Nneɛmaneɔsesɛwfo ahorow ahorowa ɛhwehwɛ sɛ bere tenten-dade a ɛyɛ den no gyina pintinn.

Ne som ho kyerɛwtohɔ wɔ ahoɔden nhyehyɛe mu si so dua sɛ ɛfata maadwumayɛ a ɛkɔ so ne bere a wɔde gyae adwuma kakraa bi, a ɛma P22 yɛ ade titiriw wɔ wiase nyinaa adwumayɛbea ahorow a ɛyɛ adwuma yiye-mu.

Sɔhwɛ & Nneɛma a Ɛyɛ Paara

Nneɛma nyinaa ne nea wɔyɛ no hyiaASTM A335 / A999 na ɛwɔ hɔneASME SA335 na ɛwɔ hɔgyinapɛn ahorow, a wɔadi ho adanse denam:

Hydrostatic anaa ultrasonic sɔhwɛ
Flattening ne flaring sɔhwɛ ahorow
Mfiridwuma mu agyapade ho adansedi (tensile, hardness) .
Nsusuwii ne aniwa so nhwehwɛmu
Nkɛntɛnso a wɔpaw ne radiographic nhwehwɛmu

Wɔde batch biara kɔmaEN 10204 3.1/3.2 adansedie krataa, traceability a edi mũ, ne mill sɔhwɛ kyerɛwtohɔ ahorow.

Engineering Ahotoso ne Octal Pipe

Octal Pipe de ASTM A335 P22 paipu ma wɔnormalized ne tempered tebea, hwɛ hu sɛ wotumi hyɛ ho nkɔm sɛ ɔhyew a ɛkorɔn-yɛ adwuma ne weld a ɛne ne ho hyia.
Ɛnam ISO-agye atom sɛ wɔyɛ, QA/QC nkabom, ne project-level nkrataa nti, Octal Pipe de alloy pipe nhyehyɛe a wotumi de ho to so mathermal, refinery, ne process adwumayɛbea ahorow wɔ wiase nyinaa.

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