ASTM A213 T9 n-gang n-gang n-gang

Superheater bank ni, reheater circuit ni, HRSG n-gun shayawm ai daw ni hte n-gun shayawm ai coil ni gaw, n-gun n law ai-Cr n-gun ni hpe shinggrup kau ya ai n-gun n-gun hte oxidation n-gun ni hpe hkam sha nga ai. ASTM A213 T9 gaw 9Cr–V–Nb nlung ni a galaw shapraw ai hkam sha lam n lawm ai sha 1.25–2.25Cr grade ni hta grau nna n-gun ja ai n-gun hte grau ngang grin ai scale arawn alai hpe jaw ya ai majaw, aten galu, n-gun n-gun hte coil n-gun n-gun ni gaw hkrit tsang hpa hpe uphkang ai shara hta tatut galaw mai ai lata la ai lam langai byin wa ai.

ASTM A213/SA213 gaw n-gang n-gang -hpyen hpe lachyum shaleng da aihka htungboiler hte nbung galai ai jak ni a matu. Project ni gaw, piping schedule ni a malai, shinggan diameter, kaji dik htum bunghku hte cut length hpe datasheet ntsa kaw hkrak sha tsun da ai. Tube-to-tubesheet hkrak hkra galaw na matu, dingyang hte n-gup magap hpe n-gun ja hkra galaw ai; npawt nhpang ni hpe n-gun n rawng ai (sh) square-cut hku nna garan jaw ai, field butt welds galaw na matu masing jahkrat da ai shara ni hta sha bevels ni lawm ai.

Laika man 1 - A213 T9 tsi mawan n-gun (wt.%)

Table 2 - Hkrang shapraw na matu n law htum arung arai ni

Design gaw uphkang ai tara kaw na bungli galaw ai nbung laru hta ahkang jaw da ai n-gun ni hpe jai lang ai.

Performance hpe hkang ai gaw .n-gang katsi ai, hpang-jahkring ai lang hte ntsa na n-gunrau galaw ai. ~9% Cr hte, oxidation gaw a hkan nang chye ai.ga shadawn tara(oxide-hkum hkrang2 ≈ k·ten); parabolic rate gaw n-gun n law ai-Cr steel ni hta grau npu ai, dai gaw scale n-gun hte spallation byin ai lam ni hpe shadawn sharam da ya ai. Mo gaw carbides ni hpe ngang grin shangun nna, grain-lamu ga jarit htum mat ai hte hka htung rawt jat wa ai hpe jahkring kau ya ai majaw aten -madung ai deformation kaw na bunghku sum ai lam gaw loi loi sha rai nga ai.

Dai kawkatsi ai, hkyet ai daw ni1.25–2.25Cr lata la ai lam ni hta grau nna, n-gun ja ai-reheat circuits hte heater convection banks zawn re ai ni gaw, T9 gaw 1.25–2.25Cr lata la ai lam ni hta grau nna, shingnip shingna hte bunghku n-gun hpe makawp maga ya lu ai, retube a n-gun hpe shayawm ya lu ai hte, shed scale a majaw byin pru wa ai hka hkin gau n-gun hpe shayawm ya lu ai. HRSG lit hta, chyahkring hkring shingjawng ai, nbung n-gun ni gaw oxide n-gun ni hpe sharawt ya nna, spallation/"re-oxidation" hpe jat ya ai; Ramp rates hpe shadawn sharam ai, soot-htu ai hpe grau kaja hkra galaw ai, hte hkan tam aihka htung-hpri katsi ai (TMT)hotspots ni gaw arung arai hku nna hkrit tsang hpa hpe shayawm ya ai. Deposit chemistry hte seng ai lam ni: alkali-law ai (sh) sulfur-law ai nhprang wan gaw oxide hpe galai shai ya lu nna, buga ginra hta gasat gala ai lam hpe lawan ladan galaw ya lu ai majaw, borescope hte jep joi ai lam hte rau wan sau/nhprang hpe jep joi ai lam hpe lang nna, san seng ai lam hte jep joi ai lam lapran aten hpe masing jahkrat ai.

Creep a matu, T9 a akyu gaw 100 hta dung nga ai.galu ai-asak ginra: n-gun ja ai, matut manoi nga ai n-gun-lamu ga jarit carbide network gaw, n-gun rawng ai aten hpe grau kaja hkra galaw ya nna, n-gun rawng ai lam hpe maren sha tawn da ya ai. Grai katsi ai (sh) n kaja ai hku -hkang lu ai bai katsi ai gaw, nli tum ni hpe n-gun ja shangun nna, carbides ni hpe spheroid byin shangun ai majaw, aten garai n du yang, n-gun rawng ai, ovality (sh) leaks byin pru wa ai. Tatut hta, trending .Oxide n-gun/hkum hkrang n-gun jat wa aiTMT labau hte rau jep joi ai lam hpe aten masat da na matu sakse npawt nhpang hpe jaw ya ai.

Table 3 - Hkai sun masat kumla hte engineering mahtai

Laika man 4 - Laksan shadawn shadang shingnip

Surface state gaw hot duty hta prat tup hpe dawdan ya chye ai. Tatut galaw mai ai hkang zing ai loop gaw:de-scale → san seng ai → hkyet mat ai → shingkyit → shinggrup da ai → jep joi yu u. Form galaw ngut ai hpang, ID/OD kaw na heat tint hte ngam ai scale hpe shaw kau ra ai; san seng ai media hte hka shin nna, ID hpe ka da ai target de katsi mat hkra galaw u (ga shadawn, ambient a lawu na dew point hpe masat da ai margin hte). Htuk manu ain-gun ja ai jahtum na baw nihte ga nhpu hte hka hpe ninghkap lu ai makawp maga ai wrapping hpe lang u; hka lim ai hte UV makawp maga ai hte npu kaw na bundle ni hpe tawn da u.

Hkap la ai lam gaw ITP kaw lawm ai majaw QA gaw debate n galaw ai sha sign off galaw mai ai. "San seng ai" ngu ai lachyum hpe tsun dan u (visual class, chloride/oil limits nga ai rai yang), gara hku katsi ai hpe jep yu ai, shingbyi shara a nbung laru a matu gara packaging ra ai hpe tsun dan u. Carbon-steel tooling hpe T9 hka htung kaw na tsan tsan tawn da nna, n-gun n rawng ai -hpyen n-gun n shang hkra; Mixed shop ni hpe koi yen n mai ai shara hta, post-san seng ai hpe galaw uFerroxyl hpe jep yu usample ni hta. N shapraw shi yang, sumla ni hpe ka da nna, makawp maga ai laika hpe bundle ID hte batch galaw u, shing rai yang, installation galaw ai ni gaw, line hpe shingbyi shara hta awu asin n byin ai hpe chye lu na re.

ASTM A213 T9 hpe madung tawn ai bungli masing ni a matu,Octal Pipen-gun n rawng ai hka htung ni hpe jaw ya ai, ladat ni hte laika ni hpe masing ITP hte maren hkrak hkra galaw ya ai, ra ai shaloi, shanglawt ai sakse hkam ai lam (ga shadawn, BV, SGS) hpe lajang ya lu ai.

Q1: ASTM A213 T9 (ASME SA213 T9) ngu ai hka htung hpe hpa a matu lang ai kun?
A1:9Cr{2}}1Mo ferritic alloy tubing hpe n-gun ja ai, n-gun kaba ai magam bungli hta, wan wut ai wan jak, superheater, hte wan wut ai jak ni a matu n-gun n rawng ai.

Q2: A213 T9 gaw A335 P9 hte maren sha re kun?
A2:Shanhte hpe chemistry/UNS hku nna maren sha re ngu masat da ai (T9=tubing spec, P9=pipe spec), raitim, nang gaw bungli masing a ra ai madang hte chyam dinglik ai shara hte maren sha rai ra ai.

Q3: ASTM A213 T9 tubing hpe n mari shi yang, n-gun hpe jep yu na matu hpa hpe hpyi shawn ra ai kun?
A3:3.1 MTC hta nbung n-gun + nbung hpe tsi lajang ai masa, chemistry/mechanical mahtai, hydrotest (sh) NDE (tsun da ai hte maren), shadawn shadang jep joi ai lam ni, hte hkum tsup ai masat da ai lam/hkan tam lu ai lam ni lawm ai.

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