API 5L X70 n-gun rawng ai hka htung a masat da ai lam - BLOG

Pipeline hkrang shapraw ai hta X70 a n-gun kaba ai lit

API 5L line pipe grade ni gaw n-gun kaba ai shara hpe shinggrup da ai;X70npu na band hpe zing madu da ai rai nna, dai shara hta designer ni gaw tatut galaw mai ai field welding ladat ni hpe naw qualify galaw lu ai. Galu ai-tsan ai gas line hte maigan de dut shabra ai pipeline law law gaw X70 de madung hku nna 2019 ning de htawt sit wa ai.bunghku n-gun hpe gang je kau nna, n-gang tonnagedesign n-gun hpe n jahkrat kau ai sha. Dai n-gun kaba ai hte hkang lu ai weldability hpe kahkyin gumdin ai lam gaw, X70 gaw hpa majaw X60/X65 hpe, n-gun kaba ai- lam nnan ni hta law law lang galai shai kau ai lam hpe sang lang dan nga ai.Typical design drivers ni hta lawm ai:

Hkrun lam hkawm ai n-gun grau tsaw ai-tsan ai gas htawt sit ai lam a matu
N-gun n rawng ai ga (sh) yak hkak ai shara hta pipeline a n-gun hpe shayawm kau u
Lam galu ai gaw n-gang manu hpe jat shangun ai panglai hkin-gau rawt jat lam ni hte matut mahkai ai maigan de dut shabra ai lam ni
Bunghku n-gun hpe gawgap mai ai shadawn sharam kata kaw tawn da let, nga taw sai lam ni hpe loop (sh) uprating galaw ai

Project langai X70 hta lock galaw ngut ai hpang, dai arung arai ni hpe tsun dan ai gaw .PSL madang, shinggrup da ai arung arai hkrang hte ka-up ai ningmurau jawm nna, dai madung lata la ai lam grup yin hta NDT, laika buk hte gawgap ra ai lam ni hpe jat bang ai.

API 5L X70 ERW HFW welded pipe manufacturing line - octal pipe API 5L X70 SSAW spiral welded pipe seam detail - octal pipe

Uphkang ai madang hte arung arai madang ni

2019 ning a matu lakap ai laika buk.API 5L X70 htu da ai hka htunggaw API 5L madang rai nna, ISO 3183 hte maren rai nga ai.

X70 PSL1- n-gun dat dat ai magam bungli a matu welded line pipe
X70 PSL2.- welded line pipe hte grau ngang kang ai shadawn sharam, ngang kang ai masat masa hte hkan tam mai ai

API 5L gaw n-gun n rawng ai hte n-gun rawng ai arung arai lahkawng yan hpe shinggrup da ai, raitim, galu-tsan ai, kaba ai-diameter system ni gaw grai kam hpa ai .weld galaw da ai X70. PSL2 welded pipe a matu, masing laika ni hpe laksan hku nna tsun da ai:

Hkamja lam hte seng nna (TMCP (sh) Q+T, plate/coil lam hta hkan nna)
Ra ai Charpy hkra machyi ai nbung katsi ai hte hkap la ai n-gun
Weld seam hte pipe hkum hkrang a matu NDT a shingdu labau hte chyahkring hkring
Steel heat kaw nna ngut sai pipe du hkra hkan tam mai ai tara ni, chyam dinglik mahtai hte coating record ni lawm ai

Mill ladat ni hte jep joi & chyam dinglik masing (ITPs) ni gaw dai ra kadawn ai lam ni hpe galaw shapraw ai lahkam ni hte sample hkam la masing ni de ga gale ya ai.

Hpaji masa hte hkrang shapraw ai lam hpe ka da ai

X70 a arawn alai gaw shi a .masat da ai n law htum hkai lu hkai sha ai n-gun (SMYS)na70,000 psi (≈ 485 MPa)API 5L npu kaw nga ai. Ndai grau tsaw ai hkai lu hkai sha ai madang gaw, X60/X65 hte shingdaw yang, design pressure langai sha hta, designer ni hpe bunghku n-gun hpe shayawm ya lu ai lam rai nga ai.

Table 1 – Kaji dik htum jak rung atsam (reference):

Madang	PSL madang	Min. Hkai sun n-gun SMYS (MPa)	Min. N-gun n-gun SMTS (MPa)	Kalang lang galu ai (%)
X60	PSL1 / PSL2.	415 hta grau kaba ai (sh) maren sha re.	520 hta grau kaba ai (sh) maren sha re.	≈ 21
X65	PSL1 / PSL2.	450 hta grau kaba ai (sh) maren sha re.	535 hta grau kaba ai (sh) maren sha re.	≈ 20–22
X70	PSL1 / PSL2.	485 hta grau kaba ai (sh) maren sha re.	570 hta grau kaba ai (sh) maren sha re.	≈ 18–21

Tsaw-n-gun ja ai hkrang shapraw laika:

SMYS grau tsaw ai gaw, jaw da ai kata na n-gun hta bunghku ni hpe grau n-gun ja hkra galaw ya lu ai, raitim, dai hpang design hpung ni gaw, grau nna lup makoi da ai hte panglai hkin-gau ntsa na magam bungli ni a matu, ovality, local buckling hte shinggan na lit ni hpe grau nna myit maju jung ma ai.
SMTS hpe n-gun shayawm ai lam hpe hkang ai masat masa ni hte hpaw nna, n-gun shayawm ai lam hpe jep joi ai lam galaw ai, dai gaw tsan ai-gas line ni hta ahkyak ai.
Elongation gaw katsi ai lamu ga hpe shinggrup ai, tie-ins hte ga npu shamu shamawt ai lam ni a matu ram ram naw nga ra ai; bungli masing law law gaw, hkum tsup ai hku n galaw shi yang, dat kasa X70 pipe ntsa hta bends hte girth welds ni hpe qualify galaw ai.

PSL2 X70 masing ni gaw .Charpy V-n-gun atsam chyam dinglik ai lam nimasat da ai nbung laru hta. N-gun ja ai-bunghku hte wan sau htawt sit ai lam ni gaw law law lang jat bang aiDWTT (drop-hkum hkrang myi prwi chyam dinglik ai lam ni)fracture byin ai hpe hkang lu na matu madi shadaw na matu.

LSAW hpe madung lam hku nna Welded galaw shapraw ai lam

X70 hpe kalang bang ngut ai hpang gara hku galaw lu na hta, galaw shapraw ai lam gaw ahkyak ai shara hpe hkam la nga ai. Diameter kaba -, n-gun kaba ai-nhprang wan hte sau bungli masing law law hta,LSAW (SAWL) hpe madung lata la ai lam hku nna masat da ai ., ERW/HFW hte SSAW hpe gaw shanhte a diameter hte n-gun atsam ni gaw design envelope hte bung ai shara hta lang ai.

1 LSAW / SAWL – N-gun kaba ai-Hpun n-gang ni a matu Madung Lam

LSAW X70 pipe hpe 2019 ning kaw nna galaw shapraw ai re.dam lada ai plateUOE (sh) JCO ladat ni hte hpaw nna, 100 lang nna welded galaw ai.lahkawng maga - hka kata de lup ai arc welding galaw ai. Ndai hpawng de ai lam gaw .diameter kaba hte bunghku kaba ni, n-gun kaba hte hkawm sa ai gas trunkline galu ni hte panglai hkin-gau de dut shabra ai line ni a matu ra ai range hte maren sha rai nga ai. Forming hte welding parameters ni hpe plate n-gun, weld n-gun hte HAZ ngang kang ai lam yawng gaw X70 ra kadawn ai lam ni hpe grup yin ting hta hkan sa lu hkra masat da ai.

LSAW X70 a laksan masat masa ni hta lawm ai:

Hkum tsup ai -weld seam hte pipe hkum hkrang a matu UT, ra ai shara ni hta masat da ai shara ni hta RT hte
Stress-relief heat treatment hpe n-gun ja ai-bunghku daw ni hta ngam ai n-gun hpe shayawm na matu hte dimensional control hpe grau kaja hkra galaw ai
Hka htung shinggrup ai hte panglai hkin-gau ntsa e jung ai hpe madi shadaw na matu, - a shinggan-hkum hkrang hte dingyang ai lam hta ngang kang ai hkam sharang lam ni
N-gun hte hkra machyi ai lam hpe chyam dinglik na matu, npawt nhpang nlung, HAZ hte weld nlung hta lachyum shaleng da ai sample la ai shara ni

Ndai blend gaw .n-gun kaba ai, bunghku-hkum tsup ai atsam hte geometric hkrak ai lamLSAW gaw hpa majaw bungli masing langai mi hta X70 hpe trunklines nnan ni a matu masat da ai shaloi, shawng nnan na galaw shapraw ai lam hpe jep joi ai lam law law nga ai hpe sang lang dan ai.

2 ERW / HFW hte SSAW – Hkap la ai lam ni

LSAW gaw diameter hte bunghku-hkum hkrang n-gun yawng hpe n shinggrup ai.ERW/HFW hte SSAWn-gun n rawng ai shara ni hpe jahpring nna ginra application ni hpe madi shadaw ya ai:

ERW / HFW X70

Hka lum ai-rolled coil kaw na shapraw nna, slit galaw nna, n-gun kaba ai -frequency welding n galaw shi yang, galu kaba ai seam hpe n-gun jaw ai.
Madung hku nna lamu ga-madung tawn ai ladat ni, loop ni hte station piping ni hta bunghku n-gun n law ai diameter kaji hte kaba ni hta jai lang ai.
Weld seam a hkam kaja lam hpe online NDT (UT/EC) hku nna yu reng ai; PSL2 masat masa ni gaw weld hte HAZ hta buga PWHT hpe shaga mai ai.

SSAW / SAWH X70

Hka kata hte shinggan de hka kata de lup mat ai arc welds ni hte helical angle hku galaw da ai coil kaw na galaw shapraw ai.
Dai majaw, n-gun ja ai spiral seams ni hpe design code hte project masat masa ni hpe hkap la mai ai diameter kaba ni hta kaja ai arung arai ni hpe jai lang ai lam hpe jaw ya ai.
Spiral weld a full-length UT hte rau, bungli masing gaw grau nna kam hpa lam ra ai shara hta RT hpe jat bang nna, n-gun jaw ai lam hpe n-gun jaw ai.

Lam yawng hpe tune galaw da ai majaw .weld hte HAZ atsam ni gaw X70 kanu kawa arung arai ni hta n-gun kya ai n re., grade hpe grai myit ru myit tsang ai madang hta jailang ai shaloi ahkyak ai lam langai re.

3 X70 LSAW Pipe a matu UOE hte JCOE hpe hpaw ai

Plate galaw ai ladat gaw ovality hpe hkang lu ai, ngam nga ai n-gun hpe garan gachyan ai hte yawng a dimensional stability hpe hkrak sha hkra machyi shangun ai. X70 LSAW a matu, lahkawng yan .UOEHteJCOEline ni hpe grai lang ai, project team ni kalang lang engineering ningmu hku nna gara hku shingdaw ai hpe san ai.

Table 2 – X70 LSAW line pipe a matu UOE hte JCOE byin pru wa ai hpe shingdaw yu ai:

Myi man nsam	UOE hpaw hpang wa ai	JCOE hpaw hpang wa ai	X70 Project ni hta byin wa na akyu ara
Sequence hpe hpaw ai	U-dip dat u → O-dip dat u → jat wa na	J-dip (law law-lahkam) → C-dip → O-dip → Jat jat ai	JCOE hta lahkam law law gaw bunghku n bung ai galu kaba ai lam ni hpe n-gun rawng ai hku hkang lu ai
Shadawn shadang hpe hkang ai	Grai kaja ai roundness hpe jat wa ai hpang	Kaja ai grup yin, law malawng gaw loi mi npu de jat wa ai	UOE hpe n-gun ja ai ovality hpe tsun da ai shaloi grau ra sharawng ai
Bunghku galu ai shadawn shadang	Ka-ang hkup kaw nna n-gun ja ai bunghku plate ni a matu ngang kang ai	Multi-step galaw ai bunghku kaba a matu mung htuk manu ai	Lahkawng yan gaw, X70 trunkline bunghku n-gun hpe madi shadaw ya lu ai.
Ngam ai myit ru myit tsang lam hkrang	Expansion gaw OD grup yin na myit ru myit tsang lam ni hpe homogenise byin shangun ai.	Lahkam mi hpang langai byin pru wa ai gaw lahkam law law hta n-gun hpe garan kachyan ya ai	JCOE hpe kalang lang npu na forming strain hpe ra sharawng ai shaloi lang ai
Hpaga galaw ai batch hpe galai shai mai ai	Tonnage kaba ni a matu akyu rawng ai, shadawn sharam sha galai shai ai	Diameter/thickness hpe ayan galai shai ai shaloi grau htuk manu ai	JCOE gaw kayau kaya-diameter (sh) daw hte daw htaw sa ai bungli masing ni a matu grau kaja ai
Laksan jai lang ai lam hpe madung tawn ai	Galu ai, bung ai mainline daw ni hte ngang kang ai hkam sharang lam ni	Size n bung ai bungli masing ni, lam daw ni hpe masat da ai	Ladat ni hpe hkan sa ai shaloi, lahkawng yan gaw X70 ra kadawn ai lam ni hpe hkan sa lu ai .

UOE hte JCOE lapran lata ai lam gaw, npawt nhpang bungli galaw ai lam shai hkat ai lam ni hta grau nna, mill configuration hte project mix hta grau nna madung nga ai. Hpa majaw nga yang, n-gun ja ai, n-gun n law ai, ra kadawn ai trunkline service a matu ra kadawn ai n-gun kaba ai, n-gun kaji ai ovalisation pipe body hpe lam lahkawng yan gaw, n-gun ja ai, n-gun n law ai hpe jaw ya lu ai.

API 5L X70 welded line pipe stock pipes stacked in yard - octal pipe API 5L X70 LSAW straight seam welded pipe weld seam close up - octal pipe

Hpa majaw nga yang, n-gun ja ai welded line pipe a matu Chemistry hkang ai lam

X70 gaw, n-gun rawng ai pipeline stress a ntsa daw de sit sa wa ai majaw,tsi mawan hkrang shaprawweldability hpe n pat kau ai sha n-gun atsam hte ngang kang ai lam hpe jaw ra ai. Dai majaw Carbon maren mara (CE) hte Microalloying madang ni hpe n-gun n law ai band ni kata kaw nna masat da ai.

– API 5L X70 (PSL2, npawt nhpang) a matu madun dan ai n-gun atsam ni.

Hkarang jet	Laksan shadawn shadang (%)	X70 n-gun rawng ai hka htung hta lit
C	≈ 0.06–0.12	Base n-gun jaw ya ai; Weldability hpe makawp maga na matu npu kaw tawn da ai
Mn	≈ 1.40–1.80	N-gun atsam hte hkra machyi ai lam hpe madi shadaw ya ai
P	0.020–0.025 hta n law ai (sh) maren sha re.	Phosphorus n law ai gaw, daw garan ai lam hpe shayawm ya ai.
S	0.010–0.015 hta n law ai (sh) maren sha re.	Sulfur n law ai gaw weld hte HAZ a bungli hpe grau kaja hkra galaw ya ai
Nb, V, Ti (yawng)	≈ 0.03–0.10	Hkaulan mam hpe jasan jaseng ai hte marang htu ai lam hpe n-gun ja shangun ai

X70 welded pipe a matu PSL2 ra ai lam ni gaw:

CEIIW hte/shnr PCM a matu ntsa tsang ni gaw, preheat hte interpass ra kadawn ai lam ni hpe tatut galaw mai ai shadawn shadang kata kaw tawn da na matu
Nb+V+Ti yawng hte langai hkrai a microalloy hta lawm ai lam ni hpe shadawn sharam tawn da ai
Cu, Ni, Cr hte Mo ni hpe lata la mai ai hkang ai lam ni gaw, n-gun hte htinggrang ai ladat ni hpe hkan sa na matu
N-gun ja ai-bunghku daw ni (sh) n-gun n law ai-katsi ai lam ni hta jat nna ngang kang ai hte ngang kang ai masat masa ni

Dai zawn hkang ai lam gaw, .tsaw ai-n-gun X70gaw katsi ai nbung laru, tsaw ai hkrang shapraw ai lam ni (sh) panglai hkin-gau hte hpawng de ai lam ni hte kayau kaya rai nga ai.

Dimensional Range hte Madung bungli masing lata ai lam ni

Welded X70 hpe n-gun kaba ai envelope ntsa kaw nna jaw mai ai. Mill atsam gaw tsep kawp shadawn sharam hpe masat da ya ai, raitim, laksan bungli masing lata ai lam ni gaw lawu na shadawn sharam ni hta hkrat sum nga ai.

- X70 line pipe hpe shinggrup da ai shadawn shadang (madun ai):

Amyu	Range / Htai tsun ai lam
Shinggan Diameter	56" daram (≈ 114 - 1422 mm)
Bunghku n-gun	– 35 mm daram, n-gun hte ngang grin ai lam hpe jep yu ai hku nna shadut ai
Shadawn shadang	SRL / DRL, shing nrai bungli masing-laksan dawm ai-de-galu
Hpang jahtum Hpang jahtum	Hkai sun hta htu na matu, n-gun n rawng ai jahtum (PE) shing nrai, n-gun n rawng ai (BE)
Dingyang ai lam	Pipe galu de ≈ 0.15 % daram sha shadawn sharam da ai

Design galaw ai nilamu ga ntsa hta -n-gun ja ai wan sau lam nin-gun hte welding galaw lu ai atsam hpe rap ra hkra galaw na matu, diameter kaba ni hpe bunghku n-gun n-gun n-gun n-gun n-gun n-gun n-gun hte kayau kaya galaw ai. X70 hpe lang ai.panglai hkin-gau de dut shabra ai (sh) lamu ga de hkrat wa ai lam nishinggan na n-gun, shinggrup ai hte jung da ai lit ni hpe ninghkap lu na matu grau htum ai bunghku ni hpe madun dan ai, dai hte rau ovality hte local geometric n hkum tsup ai lam ni hpe grau ngang kang ai shadawn sharam ni hte rau madun dan ai.

Coating ladat ni-ga shadawnFBE, 3LPE, 3LPP hte nlung n-gun hpe shinggrup da ai-dai hpang, n-gun yawm mat na hkrit tsang hpa hpe hparan na matu, on-npu na ngang grin ai lam hte lam makau na thermal performance hpe hparan na matu masat da ai.

Jep joi ai lam, chyam dinglik ai lam hte welding galaw ai ladat hpe hkang ai lam

X70 gaw npu na grade ni hta grau nna stress hta bungli galaw ai majaw, jep joi ai lam hte chyam dinglik ai lam gaw grau hkum tsup ai. Welded X70 pipe a matu malai hku nna lawu na hte maren tsun dan mai ai:

Table 5 – API 5L X70 hpe shinggrup da ai ga shadawn jep joi ai lam hte chyam dinglik ai matrix:

Pang	X70 Welded Pipe a matu ra kadawn ai lam ni
Hka n-gun chyam dinglik ai	100% pipe ni, chyam dinglik ai n-gun hpe hkrang shapraw ai code hte masat da ai
Weld n-gang NDT	100% UT/RT/EC gaw galaw sa wa ai lam hte PSL madang hta hkan nna galaw ai
Pipe hkum hkrang NDT	LSAW/SSAW a matu UT, bungli masing spec langai hta jat nna jep joi ai lam ni
Tensile chyam dinglik ai lam ni	Katsi ai hte n-gun ja ai shadawn shadang langai hta
Charpy hkra machyi ai chyam dinglik ai lam ni	PSL2 a matu myit hkrum da ai nbung laru hte shara hta ra ai
DWTT	Gas htawt sit ai lam hte bunghku kaba ni a matu ayan tsun da ai
Shadawn shadang jep joi ai lam	OD, bunghku, shingnip shingna, dingyang, jahtum geometry
Coating jep joi ai lam	Hkring sa ai aten hta chyam dinglik ai lam hte sumla hpe coating masat da ai hku nna

Gawgap hpung ni gaw, .htu sha ai ladat a atsam marai (WPS/PQR)X70 hte bungli galaw ai shaloi. Madung myit maju jung ai lam ni gaw:

Katsi ai shang ai lam hte interpass katsi ai shadawn sharam
Weld magri n-gun bung ai (sh) loi mi grau bung ai vs. X70 npawt magri
N-gun ja ai hte HAZ ngang kang ai hpe jep chyoi ai, grau nna jak hte htu ai
Girth welds hta n tara ai lam, weld n-gun shaja ai lam hte ngam nga ai n-gun hpe hkang lu ai

Kaja ai-htuk manu ai ladat ni hte sharin hkam la sai bungli galaw masha ni gaw, X70 joint ni hpe mainline galaw shapraw ai manu hta jung na matu ahkang jaw ai rai nna, grai sawng ai quality ra kadawn ai lam ni hpe naw hkan sa lu ai.

Hkamja lam hte Octal Pipe jaw ai shara

Pipeline madu ni gaw law law lang lata la aiAPI 5L X70 htu da ai hka htunggrade langai mi hta design pressure kaba, lam galu hte hkang lu ai bunghku n-gun hpe kayau kaya galaw ra ai shaloi. Kalang lang byin ai mabyin masa ni hta, tsan ai ginra ni hku nna gas trunkline nnan ni, panglai hkin-gau hkin-gau ni hte matut da ai dut shabra ai hte lamu ga de hkrat wa ai lam ni, hte, n-gun hte n-gun atsam lahkawng yan hpe pipe n-gun n law ai sha jat ra ai, ya nga ai lam ni hta uprated loops (sh) galai shai ai daw ni lawm ai.

Octal Pipe gaw ndai bungli masing ni hpe ERW/HFW, LSAW hte SSAW hkrang ni hta X70 kaw nna API 5L PSL1 hte PSL2 de welded galaw ai hku nna madi shadaw ya ai, bungli masing masat da ai hte maren diameter, bunghku n-gun, shingnip shingna hte jep joi ai lam hpe shingdaw ya ai. BV, DNV, SGS (sh) kaga lata san da ai hpung ni kaw nna masum ngu na-party sakse hkam ai lam hpe lajang mai ai, dai hku nna n-gun ja ai X70 arung arai jahpan ni hpe pipeline hkrang shapraw ai lam yawng hte QA/QC hkrang masa hta san seng ai hku hpaw shalawm lu na re.

FAQ

01.Welded line pipe a matu API 5L X70 PSL1 hte PSL2 gaw hpa shai ai kun?

A1:PSL2 gaw chemistry hpe hkang zing ai lam hte chyam dinglik/hkap la ai lam hta grau nna n-gun ja ai, ahkyak ai pipeline bungli masing ni a matu mung masat da ai.

02.API 5L X70 hte shinggrup da ai line pipe a matu ERW hte LSAW hte SSAW hpe gara hku lata la na kun?

A2:Ra ai OD/bunghku n-gun, project spec, hte weld/NDT ra ai lam ni hpe madung tawn nna lata la u-LSAW/SSAW gaw diameter kaba ni a matu, ERW gaw kaji ai kaw nna lapran tsang ni a matu lang ai.

03.API 5L X70 welded line pipe a hkamja lam hpe n mari shi yang hpa hpe hpyi shawn ra ai kun?

A3:MTC/traceability, ra ai PSL madang, carbon maren mara manu ni, NDT mahtai, hka chyam dinglik ai lam, hte gara masing- hta mung masat da ai hkra machyi ai lam/hten run ai lam chyam dinglik ai lam ni hpe san yu u