ASTM A335 P11 N-gun n rawng ai n-gang n-gang n-gun rawng ai n-gang n-gang n-gun rawng ai n-gang n-gang - BLOG

Arung arai ni hpe maram yu ai

ASTM A335 tsang P11 gaw 1990 ning hta lawm ai.n-gun n law ai Cr{0}}Mo n-gang dinghku (1-1.5% Cr, 0.5% Mo)hta lang na matu laksan engineer galaw da ai.n-gun ja ai-n-gun ja ai hte n-gun ja ai-n-gun ja ai hka htung ni.Dai gaw jak n-gun, oxidation hpe ninghkap lu ai atsam, hte galaw shapraw lu ai atsam lapran hta rap ra ai lam hpe madi madun ai-superheater coils, pressure headers, hte steam transfer lines zawn re ai arung arai ni a matu kaja dik htum re . Hpyen hpaji masa hku yu yang, .ferritic-n-gun ja ai kaji kajaw hkrangof P11 hta carbides (M23C6 hte M6C law malawng) a kaja ai hku garan ginhka ai lam hpe mu lu ai, dai gaw shi acreep-hten run ai asak hte shadawn shadang ngang grin ai lam.
Chromium gawn-gun ja ai oxide shadawn shadang (Cr2O3)600℃(1110℃F) du hkra n-gun shayawm ai hte n-gun shayawm ai lam hpe makawp maga ya ai, molybdenum gaw ferrite lattice hpe n-gun ja shangun nna, n-gun shayawm ai lam hpe shayawm ya ai.
Ndai alloying elements ni yawng hpe shingdaw yu yang:

Aten galu-hprawng hkawm ai hpe ninghkap lu ain-gun rawng ai lit hte nbung katsi ai npu hta.
Stable oxide byin pru wa ai gaw ntsa lam hpe makawp maga ya ai hte tau hkrau chye lu ai n-gun yawm mat ai akyang lailen hpe madi shadaw ya ai.
Ninghkringweld galaw lu aihte thermal cycling galaw ngut ai hpang, n-gun yawm mat chye ai.
N-gun ja ai hpe makawp maga ya nna, mam n-gun n rawng hkra makawp maga ya ai carbon madang hpe hkang lu ai.

Ndai metallurgical stability a majaw, ASTM A335 P11 gaw 2019 ning a matu grau nna masat da ai arung arai langai mi hku nna naw nga nga ai.Boiler hka htung ni, grai katsi ai jak ni, hte galaw ai hka htung niwan n-gun shapraw ai hte wan sau htu shapraw ai magam bungli hta.

Chemical hte jak rung atsam marai ni

Hkarang jet	% Masat masa madang	Madung Magam Bungli
Kabon (C)	0.05 – 0.15	N-gun ja wa nna, hprawng hkawm ai hpe ninghkap lu ai
Manga (Mn)	0.30 – 0.60	Hka lum ai bungli galaw lu ai atsam hte ductility hpe grau kaja hkra galaw ya ai
Silikon (Si)	0.50 – 1.00	Oxidation hpe ninghkap lu ai atsam hpe jat ya ai
Phosphorus (P)	0.025 hta n law ai (sh) maren sha re.	Brittleness hpe hkang ai
Nhprang wan sau (S)	0.025 hta n law ai (sh) maren sha re.	Aids jak hte galaw lu ai atsam
Chromium (Cr)	1.00 – 1.50	Makawp maga ya ai oxide film hpe shabyin ya ai
Molybden (Mo)	0.44 – 0.65	-katsi ai n-gun hpe shatsaw ya ai

Hpaji hte seng nna ra ai lam ni
Tensile 415 MPa hta grau kaba ai (sh) maren sha re • Yield 205 MPa hta grau kaba ai (sh) maren sha re • Elongation 30 % hta grau kaba ai (sh) maren sha re • Hardness 163 HBW hta n law ai (sh) maren sha re

Hpaga lam hte katsi ai tsi lajang ai lam

ASTM A335 P11 pipe ni hpe 2019 ning hta galaw shapraw ai re.n-gun n rawng ai katsi ai extrusion (sh) katsi ai sumla hkrung, langai sha re ai n-gun n bung ai hkrang hte hkrak tup hkrak re ai shadawn shadang hpe hkang lu hkra galaw ya ai.
Hpaga galaw ai lam a lahkam shagu hpe atsawm sha yu reng nna, metallurgical consistency hpe n-gun jaw nna, kata na n kaja ai lam ni hpe shayawm kau lu na matu galaw ai.

Hpaga lam hte galaw shapraw ai ladat

Billet katsi ai hte htu ai– Alloy billets ni hpe 1100–1150℃du hkra katsi shangun nna, shinggrup ai ladat ni hpe lang nna htu nna, n-gun langai sha lwi ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai n-gun rawng ai shell hpe galaw ai.

Katsi ai (sh) katsi ai hku ngut kre ai– Pipe ni hpe hpang jahtum bunghku n-gun de shinggrup (sh) shinggrup nna, dai hpang nbung hpe katsi shangun ai (sh) lapran na normalizing galaw ai.

Kaja ai hku galaw ai (940–980℃)– Ferritic grains ni hpe jasan jaseng ya ai, garan ginhka da ai carbides ni hpe hka ja ya ai, n-gun langai sha re ai hpe jat ya ai.

N-gun ja ai (675-755℃)– Kata na myit ru myit tsang lam ni hpe shayawm ya ai, ductility hpe bai gram lajang ya ai, creep hpe ninghkap lu na matu carbide morphology hpe ngang grin hkra galaw ya ai.

Jep joi ai lam hte chyam dinglik ai lam– Ultrasonic (sh) eddy{0}}current NDT, hka n-gun hpe chyam dinglik ai lam, ngang kang ai lam hpe jep chyoi ai lam, shadawn shadang shadawn ai lam ni lawm ai.

Ndai lahkawng lang-stage n-gun dat tsi lajang ai gaw .n-gun ja ai ferrite-carbide matrixn-gun yawm mat ai hpe ninghkap nna, aten galu-magam bungli galaw ai aten hta jak n-gun hpe makawp maga ya ai.
Weld galaw ai ladat ni a matu, post-weld katsi ai tsi lajang ai lam (PWHT) hpe kam shangun ain-gun n rawng ai hkrang hpe bai gram lajang ai hte hydrogen myit ru myit tsang lam hpe shayawm ya ai, shim lum ai hku nna -hkum hkrang n-gun kaba ai bungli galaw na matu ahkyak ai.

Shadawn shadang

Parameter	Laksan Range
Shinggan Diameter	12.7 - 610 mm (1⁄2 - 24 in)
Bunghku n-gun	1.2 - 100 mm
Shadawn shadang	m du hkra (SRL / DRL / htum ai galu de)
OD hkam sharang ai lam	± 1 %
WT hkam sharang ai lam	± 10 %
Dingyang ai lam	0.8 mm / m hta n law ai (sh) maren sha re.

hta lu mai ai.n-gun n rawng ai, shing nrai, n-gang rawng ai jahtum niinstall galaw ra ai hte maren galaw ai.

Hkringhtawng-Katsi ai shara hta galaw lu ai lam hte jai lang ai lam ni

Bungli galaw ai nbung katsi ai aten ni du wa ai shaloiDegri 600, ASTM A335 P11 gaw 2019 lapran laklai ai rap ra lam hpe madun dan ai.Oxidation hpe ninghkap lu ai, katsi ai hpe ngang grin lu ai, hte jak hte n-gun n rawng ai.
Matut manoi chromium-law ai oxide layer byin pru wa ai gaw aten galu hkam sha ai shaloi scaling hte metal sum ai lam hpe shayawm ya lu ai, molybdenum gaw .n-gun hpe hkam la lu ai hte microvoid hpawng de ai hpe ninghkap lu ai.

Ndai alloy gaw laklai ai hku nna makau grup yin hta kaja hkra galaw lu ai.nbung n-gun galai shai ai lam, nbung n-gun shayawm ai lam, hte n-gun galai shai ai lam ni, ngang kang ai lam hte weld dinghpring ai lam lahkawng yan hpe makawp maga ya ai.

Magam bungli galaw ai hta akyu nga ai

Creep n-gun hpe hkam la lu ai:Hkying hkum law law magam bungli galaw ai hta kam mai ai tensile hte rupture hpe ninghkap lu ai.
Thermal n-gun yawm ai hpe ninghkap lu ai atsam:Fine-grained microstructure gaw jat wa ai-htum wa ai shingjawng poi ni kaw na htum mat ai hpe shayawm ya ai.
Npu na Thermal jat wa ai lam:Dimensional ngang grin ai lam gaw, yak hkak ai hka htung ni hta weld alignment hpe makawp maga ya ai.
Ntsa hpe makawp maga ai lam:Stable oxide film gaw n-gun n law ai hte jep joi ai aten hpe galu hkra galaw ya ai.

Laika shawk shawn ai lam ni

N-gun shapraw ai lam:Boiler hka htung ni, superheater coil ni, bai hka ja ai baw ni.
Hka ja ai jak & wan sau jak rung ni:Hka htung ni hpe galaw nna htawt sit ai, gram lajang ai hka htung ni.
Hpaga lam galaw ai ladat ni:Steam manifold ni hte -n-gun kaba ai hka htung ni hpe lang ai.
N-gun dat ai hka lawng ni:Hkringhtawng hte myit ru myit tsang lam ni a npu hta aten galu-magam bungli a matu.

Jep joi ai lam, masat masa galaw ai lam hte jaw ya ai lam

P11 pipe yawng hpe 2019 ning hte maren chyam dinglik nna masat masa galaw da ai.ASTM A335 / A999HteASME SA335 madang ni.
Delivery shagu hta .Hka htung chyam dinglik ai laika (EN 10204 3.1 / 3.2), hkum tsup ai hku hkan tam lu ai hte hkan sa lu ai hpe kam hpa ai.

Chyam dinglik ai ladat ni hta:

Bunghku nsen hpe ultrasonic (sh) hydrostatic hku nna jep yu ai.
Tensile, ngang kang ai, n-gun n rawng ai, hte n-gun rawng ai hpe jep joi ai lam.
Project masat da ai hte maren, lata la mai ai radiography (sh) hkra machyi ai lam hpe chyam yu na.

Octal Pipe gaw jaw ya aihkum tsup ai QA/QC madi shadaw ai lam, a matu laika bukhtu sha ai ladat a atsam marai (WPS/PQR), hte mungkan ting na EPC hte n-gun atsam masing ni a matu kam mai ai hku htaw sa lu na matu mungkan ting na logistics ni hpe galaw ai.

Ya matut mahkai mai ai

FAQ

Q1: ASTM A335 P22 (ASME SA335 P22) ngu ai pipe hpe hpa a matu lang ai kun?

A1:Wan jak ni, sau htu shapraw ai shara ni, wan sau htu shapraw ai shara ni hta -katsi ai, n-gun kaba ai service piping ni hpe galaw ai.

Q2: P22 chrom moly pipe a matu "2.25Cr-1Mo" ngu ai lachyum gaw hpa rai ta?

A2:Dai gaw, nbung katsi ai shara hta creep hte oxidation hpe ninghkap lu ai atsam hpe jat ya ai alloy design (2.25% Cr + 1% Mo daram) hpe tsun mayu ai.

Q3: ASTM A335 P22 n-gun n rawng ai pipe a matu gara nbung n-gun hpe n-gun jaw ra ai kun?

A3:Normalizing hte tempering (N+T) hpe laika buk hta ka da ai n-gun-hpe tsi lajang ai lam ni hpe ka da ai.

Q4: P11 (sh) P91 a malai P22 hpe galoi aten hta lata ra na kun?

A4:P22 hpe P11 hta grau -temperature duty a matu mid-grade hku lata la u, P91 hte law law lang byin chye ai grau ngang kang ai hkang zing ai lam ni hte manu grau tsaw ai hpe koi ra ai.

Q5: P22 pipe quality hpe n mari shi yang hpa hpe hpyi shawn ra ai kun?

A5:EN 10204 3.1/3.2 MTC hpe nbung hpe hkan tam lu ai, jak/chemistry mahtai, ngang kang ai, hte tsun da ai hte maren hydrostatic (sh) UT chyam dinglik ai lam ni lawm ai.