A312 hte hkrak ai Scope hte masa lam ni
ASTM A312 gaw, n-gun n rawng ai, n-gun rawng ai, grai katsi ai-bungli galaw ai austenitic stainless steel pipe hpe shinggrup da ai, n-gun rawng ai hte n-gun rawng ai-hkum hkrang n-gun rawng ai magam bungli ni a matu, tsi mawan galaw ai, hka ja ai, hka n-gun rawng ai, hte hkai nmai ni hpe rap ra hkra galaw ai; n-gun n-gun galai shai ai/hpyen n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun n-gun (A270) npu de hkrat sum ai, shadawn shadang ni gaw ASME B36.19M (Sch 5S/10S/40S/80S) hpe hkan sa ai; chloride-bearing (sh) oxygenated media, panglai hka-makau grup yin na katsi ai circuit ni, san seng ai lam hte bungli galaw ai aten hpe ahkyak shatai nna gram lajang ai bungli masing ni hta, A312 a grade lata la ai lam ni hte ntsa lam hpe gram lajang ai lam ni gaw grau nna akyu rawng nga ai.
Nang teng sha lu la ai Grades ni
Law malawng mari ai order ni gaw grade dinghku kaji langai hpe madung tawn ai. Lahkawng lang-masat da ai zawn re ai304/304Lshing nrai316/316LHAZ makau na welding hpe asan sha galaw ya ai sha n-ga, stock line langai sha hta n-gun atsam hpe makawp maga ya ai.
Table 1 - Masha law malawng lang ai A312 masat masa ni hte lang ai
|
Tsang (TP) |
Hpa majaw lata la ai |
Masha dat kasa tang shawn ai lam ni |
|
304 / 304L / 304H |
Hkrunlam hkawm ai manu hta chemical htuk manu ai lam kaba ai |
Madung galaw sa wa ai lam, hka htung/hka |
|
316 / 316L / 316H |
Mo-hkap la ai; grau kaja ai hka htung/hka htung hpe ninghkap lu ai atsam |
Panglai hka hte ni ai, Chloride-hkap la ai ladat ni |
|
321 / 321H |
Ti-n-gun ja ai nbung hta hkam sha lam hpe hkang lu na matu ngang grin nga ai |
Welding hte thermal cycling hte katsi ai magam bungli |
|
347 / 347H |
Nb-n-gun rawng ai; grau dam lada ai ngang grin ai hkuwawt |
Cycle jawn na hpe myit mada ai shara hta wan wut/boiler hka htung |
|
310S / 309S* |
Cr/Ni hpe sharawt ai; Oxidation/shadawn shadang hpe ninghkap lu ai atsam |
Oxidizing katsi ai wan n-ga, hka htung, jat wa ai matut mahkai lam ni |
|
904L* |
Ni/Mo/Cu law ai gaw, n-gun ja ai chloride/acid magam bungli a matu re |
Chloride n-gun ja ai (sh) kayau ai-acid lit |
* Ginra hte hkaulan mam lam hku nna lu la mai ai lam hte sut masa lam n bung ai.
Chemistry hte npawt nhpang atsam ningja ni
Ndai jahpan ni hpe aten dep jep chyoi na matu jai lang u; hpang jahtum ra kadawn ai lam ni gaw, hpang jahtum na ASTM/ASME edition ni hte mari ai wa a masat da ai lam ni hpe hkan sa ra ai.
Laika man 2 - Madun ai tsi mawan (wt.%)
|
Madang |
C (madang kaba / H lapran) |
Cr |
Ni |
Mo |
N-gun rawng ai (typ.) |
|
304(L/H) |
0.03 / 0.04–0.10 |
18–20 |
8–11 |
- |
- |
|
316(L/H) |
0.03 / 0.04–0.10 |
16–18 |
10–14 |
2.0–3.0 |
- |
|
321(H) |
0.08 / 0.04–0.10 |
17–19 |
9–13 |
- |
Ti ≈ 5×C kaw nna 0.7% hta n law ai (sh) maren sha re. |
|
347(H) |
0.08 / 0.04–0.10 |
17–19 |
9–13 |
- |
Nb+Ta ≈ 10×C-1.0% |
Table 3 - Kaji dik htum nta -katsi ai n-gun
|
Dinghku / tsang |
N-gun min |
Hkai shapraw ai min |
Galu ai min |
|
304/304L/316L |
≈ 515 MPa |
≈ 205 MPa |
≈ 35% |
|
321/347 (H lawm ai) |
≈ 515 MPa |
≈ 205 MPa |
≈ 30–35% |
|
310S/309S |
≈ 515 MPa |
≈ 205 MPa |
≈ 30% |
Design masat masa galaw ai lam gaw .ahkang jaw ai myit ru myit tsang lam ni hte katsi kahtet ai lamroom-katsi ai nambat ni hpe sha n-ga, jai lang mai ai code ni kaw na.
Dimensions, Jahpan, hte Hpang jahtum hkyen lajang ai lam - Hpa galaw ai lam hpe hkra machyi shangun ai
Pipe size ni gaw hkan nang aiASME B36.19M. Lata ai5S/10S/40S/80Sschedule ni gaw, n-gun, n-gun n-gun, hte welding lu ai lam ni hpe rap ra hkra galaw ra ai. Gawgap ai lam hta akyu rawng na matu, bungli masing law law gaw, lamu ga n-gun hpe shayawm na matu, cut-to-length daw ni hpe lata la ma ai. Hpang jahtum hkyen lajang ai lam gaw, shingjawng ai lam hte maren rai nga ai: orbital hte socket bungli a matu plain (sh) square-cut, butt welds a matu beveled galaw ai. Orbital welding (sh) ahkyak ai hka lim ai lam hpe chyam dinglik na matu masing jahkrat ai shaloi, grau ngang kang ai OD hte bunghku hkam sharang ai lam ni gaw fit-up scatter hpe shayawm ya lu ai. Ntsa lam lata la mai ai lam ni hta pickled/passivated (sh) .htoi tu ai-hkum hkrang (BA); ID ntsa hta san seng ai lam grai ngang kang ai (sh) n-gun n law ai project ni gaw, ngut kre ai hte hkap la ai masa lahkawng yan hpe tsun dan ra ai.
A312 - npu hta Seamless hte Welded Team ni tatut hta gara hku dawdan ai
Lam lahkawng yan gaw A312 hta lawm nna, nbung laru hte NDE hpe hkrak tsun da ai shaloi, magam bungli hta maren mara galaw lu ai. Welded (ERW/EFW) gaw NPS kaba ai hte galu kaba ai aten ni hta atsam hte manu jahpu hpe shayawm ya lu ai, shingnip ni hpe hkum tsup ai hku hparan ya ai-annealed hte passivated galaw da ai rai yang. Seamless hpe grau nna n-gun ja ai shara ni, n-gun ja ai bends ni, shing nrai, yak hkak ai spool ni ra ai shara ni hta grau ra sharawng ma ai. Datasheet hta gara lam hpe hkap la mai ai hte gara jep chyoi ai lam gaw yaw shada ai lit a matu maren mara re ai hpe sakse madun ai hpe tsun dan ra ai.
Hpaga lam, katsi ai hte tsi lajang ai lam, hte ntsa lam hpe n-gun jaw ai lam
Awng dang ai A312 system ni gaw, magam bungli hta n-ga, gat seng kaw nna hpang wa ai. Austenitic n-gun n rawng ai pipe gaw, chromium carbides ni hpe bai hka ja nna, langai sha re ai austenitic matrix hpe bai gram lajang ya lu ai masa hta, galaw shapraw ai lam hpe hkum tsup ai hka ja ai hte lawan ai hku katsi mat ai masa hta tawn da ra ai. Welded pipe lang ai shara hta, n-gang ni hpe dai zawn re ai hka htung-annealed masa de woi sa ai; partial (sh) local anneals ni hpe n-gun n jaw ai, hpa majaw nga yang, shanhte gaw kayau kaya ai n-gun kaji ni hte n bung ai n-gun n rawng ai n-gun hpe tawn da ya ai majaw re.
Surface integrity hpe ladat langai hku nna hparan ai: galaw shapraw ai, jasan jaseng ai, passivate galaw ai, hte jep joi ai lam ni hpe galaw ai. Heat tint, embedded iron, chloride ngam ai ni gaw aten garai n du yang n-gun yawm mat ai lam hpe byin shangun ai lam masum rai nga ai. Welding galaw ngut ai hpang nsam galai mat ai lam naw nga yang, jak hte shaw kau nna, dai hpang, project masat masa hta tsun da ai hte maren, passive film hpe chemical treatment hku nna bai gram lajang ra ai (madu law law gaw ASTM A380/A967 zawn re ai hpaga lam galaw ai ladat ni hpe hkan sa ma ai). Grai n-gun ja ai ID (sh) n-gun n law ai rouging tendency hpe ra sharawng ai magam bungli ni a matu, bright-annealed (BA) product hpe ID ngut kre ai hte san seng ai a matu hkap la ai masat masa ni hte rau masat da mai ai.
Weld-adjacent galaw ai lam gaw, grade lata ai hta grau nna, ladat masa hta grau nna madung nga ai. L-grades (sh) welds makau e ngang grin ai grades ni hpe lang ai gaw, hkam sha lam hpe ninghkap lu na matu karum ya ai; ID ntsa hta n-gun ja ai-madang tsaw ai inert gas hpe jasan jaseng ai gaw, katsi ai tint hte oxide scale hpe shayawm kau ya ai; hte post-weld hpe atsawm sha jasan jaseng ai gaw, n-gun n rawng ai shara ni hpe pat shingdang ya ai. Tooling hte media ni gaw n-gun n rawng ai-sha rai ra ai -carbon-steel brushes, shot, shing nrai, n-gun rawng ai nhprang arai ni gaw, hpang de n-gun n rawng ai magri hpe n-gun n rawng hkra galaw ya lu ai.
San seng ai lam hte makawp maga ai lam gaw, n-gun hpe pat kau ya ai. ID hpe gara hku kashin kau, hkyet kau, makawp maga ai lam, end caps ni hpe gara hku bang da ai lam, shingbyi shara hte htaw sa ai aten hta chloride hkap la ai lam hte particulate shang wa ai lam hpe hkang lu na matu bundle ni hpe gara hku shinggrup da ai lam ni hpe tsun dan u. Handover galaw na matu tatut galaw mai ai sakse langai hta, katsi ai -tsi lajang ai chart ni, passivation record ni, ID san seng ai lam a mahtai ni, tsun da ai rai yang, n-gun n rawng ai (sh) n-gun n rawng ai -n san seng ai lam ni hpe jep joi ai lam ni lawm ai. Ndai hkang ai lam ni hpe datasheet hta ka nna, n-gun n-htum hkra galaw ai shaloi, welded hte seamless A312 line ni gaw, hkai sun hta maren mara galaw nna, aten galu laman shanhte a n-gun hpe hkam sharang lu ai.
Chyam dinglik hte jep joi masing
Bullet ni hpe checklist galaw na malai, sakse ni hpe myit yu u. Langai gaw, n-gun atsam hpe madun dan ai (hydrostatic (sh) n jahten sharun ai wan n-gun chyam dinglik ai lam A312 langai hta). Kaga langai mi gaw bunghku hte ID matut manoi ai lam hpe madi shadaw ya ai (eddy-current (sh) UT gaw ahkyak ai system ni a matu 100% jan galu ai). Sensitization byin wa na hkrit tsang hpa nga ai shara hta, n-gun n rawng ai n-gun rawng ai ladat (ASTM A262) hpe jat bang da ai. PMI gaw bundle ni hta alloy masat kumla hpe jep yu ai. Ndai documentation set gaw MTC hpe heat kaw nna bundle du hkra hkan tam lu ai lam hpe jaw ya ai, hkap la ai masat masa ni hte ITP hta myit hkrum da ai shiga jaw ai ladat ni hpe jaw ya ai. Madu wa ra ai shaloi, masum ngu na-hkum hkrang sakse hkam ai lam (ga shadawn,BV, SGS) hpe lajang mai ai.
Datasheet hta bang na matu - hpe hkan sa ai
Table 4 - Datasheet lamu ga ni hte laksan shang ai lam ni
|
Sun |
Laksan shang ai |
|
Tsang / tsang lahkawng |
304/304L, 316/316L, 321/321H, 347/347H ngu ai ni hpe n-gun jaw ai lam ni rai nga ai; H-grade hta grau tsaw ai wan n-gun ra ai |
|
Size hte aten ladaw |
NPS, aten ladaw (5S/10S/40S/80S), ra ai rai yang shadawn ai bunghku |
|
Galu kaba ai hte jahtum |
- hpe-galu (sh) random hku daw kau u; jahtum hkyen lajang ai lam (hkum hkrang n-gun n rawng ai/square- daw/htum ai) |
|
Hpaga lam lam |
Seamless hte/shnr welded hpe hkap la mai ai; rap ra ai masat masa hte NDE shinggrup ai lam |
|
Katsi tsi lajang ai & ntsa lam |
Hpaji jaw ai lam; hka ja ai/n-gun n rawng ai (sh) BA; ID san seng ai masat masa |
|
NDE hte hkap la ai lam . |
Hydrostatic (sh) wan n-gun hpe chyam yu ai; EC/UT hpe shinggrup da ai; hkap la ai lam hte shiga jaw ai lam |
|
Hka htung hte san seng ai lam |
Hpang jahtum na shingnip ni, hkyet mat ai, chloride shadawn sharam, ID makawp maga ai lam |
|
Laika buk hte hkan tam mai ai lam |
MTC (EN 10204) a lam, PMI a shingdu labau, masat masa/barcoding |
|
Masum ngu na-hpung shanglawm ai lam |
Madu tsun da ai shaloi sakse hkam/ jep joi ai lam |
Project hpe madi shadaw ai
grup yin hta gawgap da ai bungli masing ni a matu.ASTM A312 n-gang n-gang, Octal Pipe304/304L, 316/316L, 321/321H, 347/347H hte lata la ai laksan grade ni hpe hka ja ai -annealed ngut kre ai, hka ja ai/n-gun n rawng ai, cut{9}} kaw nna -length galaw ai hte bungli masing ITP hpe ka da ai laika ni hpe hkan sa ai hku nna jaw ya ai. Shanglawt ai masum ngu na-party hpe jep joi ai lam hpe hpyi shawn ai hte maren lajang ya mai ai.
FAQ
Q1: ASTM A312 (ASME SA312) ngu ai n-gun n rawng ai n-gang pipe hpe hpa a matu lang ai kun?
A1:Dai gaw, n-gun ja ai-n-gun ja ai hte n-gun ja ai hka htung ni a matu austenitic n-hprang n-gang pipe re.
Q2: ASTM A312 pipe a matu TP304/304L hte TP316/316L lapran gara hku lata la na kun?
A2:304/304L hpe lata la nna, n-gun n rawng ai; chlorides hta grau kaja ai hka htung/hka htung hpe ninghkap lu na matu 316/316L hpe lata u.
Q3: ASTM A312 pipe quality hpe n mari shi yang, hpa hpe hpyi shawn ra ai kun?
A3:MTC/traceability, hydrotest (sh) NDE chyam dinglik ai mahtai, PMI, hte gara hku mung masat da ai n-gun n-gun chyam dinglik ai lam (ga shadawn, ASTM A262) hte n-gun/hpang jahtum jep chyoi ai lam ni hpe san yu u.
Masat masa ni
CE masat laika
ISO 9001 masat laika
API Q1 masat laika
ABS masat laika
AP-5L masat laika
API-5CT masat laika
