L450 steel welded yeeb nkab

API 5L X65 Classification

Nyob ntawm qib PSL thiab kev xa khoom, X65 tuaj yeem faib raws li hauv qab no:

PSL1: X65 (L450);

PSL2: X65Q (L450Q) thiab X65M (L450M);

Txhawm rau tiv thaiv cov xwm txheej hnyav ntawm ntug dej hiav txwv (O) thiab qhov chaw ua haujlwm qaub (S), API 5L PSL2 tus qauv muaj cov cai tshwj xeeb rau ob qho tib si ib puag ncig. Cov kev cai no tau qhia los ntawm kev ntxiv ib tsab ntawv tshwj xeeb rau qib yeeb nkab.

Offshore Services PSL2 yeeb nkab:X65QO (L450QO) or X65MO (L450MO);

Sour service PSL2 yeeb nkab:X65QS (L450QS) or X65MS (L450MS).

Kev Xa Khoom

Lub ntsiab lus ntawm Q thiab M

RauSAW(Submerged Arc Welded) los yogCOV(Combination Welded Pipe), Q thiab M hauv kev xa khoom ntawm API 5L PSL2 sib raug rau cov txheej txheem tsim khoom hauv qab no.

API 5L X65 Manufacturing Txheej txheem

X65cov kav dej tuaj yeem tsim los ntawm ntau yam kev tsim khoom kom haum rau ntau yam kev siv engineering.

SAWL(LSAW) yog qhov zoo tagnrho rau kev tsim cov kab loj loj, tuab-walled hlab nrog diameters ntau tshaj 660 mm, tshwj xeeb tshaj yog nyob rau ntawm tus nqi taw tes uas nws muab tus nqi kom zoo dua cov hlab seamless.

LSAWkuj feem ntau hu uaDSAWvim yog cov txheej txheem vuam ob sab siv hauv cov txheej txheem vuam. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias DSAW hais txog cov txheej txheem vuam thiab tsis hais tshwj xeeb rau cov duab lossis cov kev taw qhia ntawm vuam. Nws tuaj yeem yog ib qho ncaj seam lossis kauv seam.

Pipe End Hom rau API 5L X65

PSL1 Hlau Yeeb Nkab Kawg: Tswb kawg lossis Plain kawg;

PSL2 Hlau Yeeb Nkab Kawg: Plain kawg;

Rau cov yeeb nkab ncaj kawgcov cai hauv qab no yuav tsum tau ua raws li:

Lub ntsej muag kawg ntawm t Tsawg dua lossis sib npaug li 3.2 hli (0.125 hauv) cov yeeb nkab kawg yuav tsum yog square txiav.

Plain-kawg raj nrog t > 3.2 hli (0.125 nyob rau hauv) yuav tsum tau beveled rau vuam. Lub kaum sab xis yuav tsum yog 30-35 degree thiab qhov dav ntawm lub hauv paus ntsej muag ntawm bevel yuav tsum yog 0.8 - 2.4 hli (0.031 - 0. 093 ib.).

API 5L X65 Chemical Composition

Cov tshuaj muaj pes tsawg leeg ntawm PSL1 thiab PSL2 steel yeeb nkab t > 25.0 hli (0.984 hauv) yuav tsum txiav txim siab los ntawm kev pom zoo.

Chemical Composition rau PSL 1 Pipe nrog t Tsawg dua lossis sib npaug li 25.0 hli (0.984 nyob rau hauv.)

Chemical Composition rau PSL 2 Pipe nrog t Tsawg dua lossis sib npaug li 25.0 hli (0.984 nyob rau hauv.)

Rau PSL2 steel yeeb nkab khoom soj ntsuam nrog aCov ntsiab lus carbon tsawg dua lossis sib npaug rau 0.12%, carbon sib npaug CE_{pcm ua}tuaj yeem suav nrog cov qauv hauv qab no:

CE_{pcm ua}= C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V /15 + 5B

Rau PSL2 steel yeeb nkab khoom soj ntsuam nrog aCov ntsiab lus carbon > 0.12%, carbon sib npaug CE_lwjtuaj yeem suav nrog cov qauv hauv qab no:

CE_lwj= C + Mn/6 + (Cr + Mo + V)/5 + (Ni +Cu)/15

API 5L X65 Mechanical Properties

Tensile Properties

Kev ntsuas tensile tso cai rau kev txiav txim siab ntawm cov khoom tseem ceeb ntawm X65 cov ntaub ntawv, suav nrogyield zog, tensile zog, thiabelongation.

PSL1 X65 Tensile Properties

PSL2 X65 Tensile Properties

Nco tseg: Cov kev xav tau tau piav qhia hauv API 5L X52, uas tuaj yeem pom yog tias xav tau.

Lwm yam kev sim tshuab

Cov kev xeem hauv qab no siv rauSAW yeeb nkab hom. Rau lwm hom yeeb nkab, saib Tables 17 thiab 18 ntawm API 5L.

Weld qhia dabtsi yog khoov kuaj;

Cold-formed welded yeeb nkab hardness kuaj;

Macro soj ntsuam ntawm welded seam;

thiab tsuas yog rau PSL2 steel yeeb nkab: CVN cuam tshuam kuaj thiab DWT xeem.

Hydrostatic Test

Lub Sijhawm Xeem

Txhua qhov ntau thiab tsawg ntawm seamless thiab welded steel hlab nrog D Tsawg dua los yog sib npaug rau 457 mm (18 in.):xeem lub sij hawm Ntau tshaj los yog sib npaug rau 5s;

Welded steel yeeb nkab D> 457 mm (18 nyob rau hauv.):xeem lub sij hawm Ntau tshaj los yog sib npaug rau 10s.

Kev sim ntau zaus

Txhua lub yeeb nkab steel.

Kuaj siab

Kev ntsuas hydrostatic siab P ntawm aplain-end steel yeeb nkabtuaj yeem xam los ntawm kev siv cov mis.

P=2St/D

Syog lub hoop stress. tus nqi yog sib npaug rau qhov tsawg kawg nkaus tawm lub zog ntawm cov yeeb nkab steel xa feem pua, hauv MPa (psi);

tyog lub thickness ntawm phab ntsa, qhia nyob rau hauv millimeters (inch);

Dyog qhov teev sab nraud txoj kab uas hla, qhia hauv millimeters (inch).

Kev tshuaj xyuas tsis zoo

Rau SAW tubes, ob txoj kev,UT(ultrasonic testing) los yogRT(radiographic kuaj), feem ntau yog siv.

ET(electromagnetic testing) tsis siv rau SAW raj.

Welded seams ntawm welded kav ntawm qib siab dua lossis sib npaug L210 / A thiab txoj kab uas hla Ntau dua lossis sib npaug li 60.3 hli (2.375 nyob rau hauv) yuav tsum tsis raug tshuaj xyuas kom tag nrho tuab thiab ntev (100%) raws li tau teev tseg.

UT cov kev xeem uas tsis yog kev puas tsuaj

RT kev kuaj xyuas tsis muaj kev puas tsuaj

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