ASTM A572 LSAWW STEEL YEE

ASTM A572 GR.50 LSAWW (ncaj zig submerged arc welded) steel yeeb nkab tsawg siv nyob rau hauv high-hightrial gorycectionering teb. Cov hauv qab no yog cov lus qhia ntxaws ntxaws rau nws:

• Tshuaj lom neeg muaj tshuaj lom neeg:

• Pa roj carbon (c): tsawg dua los yog sib npaug rau 0. 23%

Manganese (MN): Tsawg dua lossis sib npaug rau 1.35%

Phosphorus (p), leej faj (s): tsawg dua lossis sib npaug nrog 0. 04%

Nws yuav muaj cov ntsiab lus microalloying (xws li niobium thiab vanadium) los txhim kho lub zog thiab tawv.

• Cov yam ntxwv txhua yam:

• Ua lub zog: ntau dua los yog sib npaug rau 345 MPa (50 Ksi)

• Lub zog tensile: {{450-550 mpa mpa (65-80 ksi)

• elongation: ntau dua lossis sib npaug rau 18% (ntsuas cua ntev 50 hli)

• Cov yam ntxwv: lub zog siab, weldability zoo thiab tsawg-kub nyuaj, zoo dua li ill dog dig carbon hlau (zoo li ANTM A36).

1.Thaum Phaj Txoj Kev: Cov phiaj hlau tau nias thiab khoov rau hauv cov ntaub pam vov, uas siv lub JCOYE (ooe (rov qab-khoov + ua ntej sib sau) cov txheej txheem.

2. Vuam: Submerged Arc Vuam (pom) yog saws, nrog ob tog vuam ob sab hauv thiab tawm kom ntseeg tau tias muaj quav Weld Seam.

3. Expansion: Txias nthuav dav yog nqa tawm ntawm welded kav los txhim kho qhov tseeb thiab muaj zog.

4. Kev tshuaj xyuas: tsis yog-kev ua phem rau kev sim siab xws li ultrasonic (UT) thiab xoo hluav taws xob (RT) kom ntseeg tau qhov zoo ntawm Weld Seams.
• Qhov loj me:

• Txheej txheej hla sab nraud: feem ntau 406mm (16 nti (16 nti) rau 1600mm (63 nti).

• Phab ntsa tuab: 6 hli rau 120 hli, haum rau kev siv siab thiab cov kabmob thauj khoom.

• Roj thiab roj tsheb thauj mus los: ntev-nyob ntawm cov roj siab thiab roj roj (xws li cov ntoo thiab submarine).

• Cov Txheej Txheem Engineering: Choj txhawb nqa, loj-teev cov ntas, wharf pawg.

• Kev Lag Luam Kev Lag Luam: Hydropower \/ Thermal fais fab Pipelines, Nuclear Lub Zog Txheej Txheem.

• Marine Engineering: Offshore platform tsho thav lug, submarine pipelines.

• Cov Qauv Tseem Ceeb:

• Astm A572: Cov Qauv Txheej Txheem (Gr.50 yog lub zog ntawm qib).

• API spec 5L: pipeline steel yeeb nkab specication (yeem siab dua qib PSL2).

• ASME B36.10M: tus qauv seem.

• Ua kom tau txais cov ntawv pov thawj ntxiv: nws tuaj yeem ua raws cov qauv thoob ntiaj teb xws li ISO 3183 thiab EN En 10219. Qee yam khoom siv kev kuaj xyuas thib peb (xws li SGS, BV).

• Cov txiaj ntsig:

Nws yog qhov haum rau cov kab uas loj thiab tuab-walled-walled, thiab nws lub siab-muaj peev xwm yog zoo dua rau tias ntawm Erw (Kuj Welded yeeb nkab).

Weld zoo yog qhov siab thiab nws qhov kev ua tau zoo tuaj yeem ua haujlwm dhau los ntawm kev nthuav dav.

Cov khoom muaj lub zog siab, txo qhov hnyav ntawm cov qauv.

Txwv:

Tus nqi yog siab dua li ntawm erw lossis ssaw (muab kauv welded yeeb nkab), thiab cov voj voog ntau lawm?

Me-txoj kab uas hla tsis yog kev lag luam siv nyiaj txiag, thiab ERW feem ntau tau xaiv ua lwm txoj hauv kev.

• vs ERW (Kuj Welded Yeeb Nkab): LSAW tawm cov yeeb nkab welded): lsaw

• vs ssaw (kauv welded yeeb nkab): LSAW tau qhov tseeb dua thiab muaj kev ntxhov siab qis dua.

• vs seamless cov yeeb nkab: nws muaj tus nqi qis dua, tab sis nws lub siab-kev muaj peev xwm muaj tsawg dua rau cov txiv neej seamless ntawm tib qib.

• Piav qhia kom meej: Qib siab, nruab nrab (rau corrosiveness, ntxiv txheej lossis kev tiv thaiv Cathodic yog yuav tsum tau).

• Yuav kuaj cov kev xeem: Xyuas kom cov neeg muag khoom muab daim ntawv qhia xeem \/ RT kev soj ntsuam thiab cov khoom lag luam zoo lav (MTC).

• Ua Tshuab: Yog tias nws yog siv nyob rau hauv qhov chaw tsawg-ib puag ncig (xws li -46} degree), yuav tsum tau txais kev paub tseeb.

ASTM A572 Gr.50 LSAWW steel kav, nrog lawv cov txheej txheem siab dua rau cov xwm txheej uas nyiam ua rau muaj kev nyab xeeb rau kev nyab xeeb thiab kav ntev.