1.Basic yuav tsum tau rau cov tsos ntawm LSAW welds

Ua ntej qhov kev sim tsis muaj kev puas tsuaj ntawmLSAW steel kav, kev tshuaj xyuas ntawm qhov zoo li weld yuav tsum ua tau raws li qhov yuav tsum tau ua. Cov kev cai dav dav rau cov tsos ntawm LSAW welds thiab qhov zoo ntawm cov pob qij txha welded yog raws li hauv qab no: cov tsos ntawm cov vuam yuav tsum tau tsim kom zoo, thiab qhov dav yuav tsum yog 2 hli ib sab ntawm ntug ntawm qhov zawj. Qhov siab ntawm lub fillet ntawm lub fillet weld yuav tsum ua raws li cov kev cai tsim thiab cov duab yuav tsum du du. Qhov saum npoo ntawm qhov sib koom welded yuav tsum yog:

(1) Kev tawg, tsis siv, pores, slag inclusions, thiab splashes tsis pub.

(2) Cov kav dej, cov hlau tsis muaj steel thiab cov hlau alloy steel yeeb nkab weld nto nrog tus qauv tsim kub qis dua -29 degrees yuav tsum tsis txhob muaj undercuts. Lwm yam khoom siv yeeb nkab weld seam undercut qhov tob yuav tsum siab tshaj 0.5mm, nruam undercut ntev yuav tsum tsis pub tshaj 100mm, thiab tag nrho ntev ntawm lub undercut ntawm ob sab ntawm weld tsis ntau tshaj 10% ntawm tag nrho cov ntev ntawm lub weld. .

(3) Qhov saum npoo ntawm qhov vuam yuav tsum tsis txhob qis dua qhov chaw ntawm cov yeeb nkab. Weld hlaws qhov siab yog tsis ntau tshaj 3 hli (qhov siab tshaj plaws ntawm cov welded sib koom pab pawg mus rau nram qab bevel).

(4) Qhov tsis ncaj ncees lawm ntawm qhov sib koom ua ke yuav tsum tsis pub tshaj 10% ntawm phab ntsa thickness thiab yuav tsum tsis pub tshaj 2 hli.

2.Ntoo uas tsis yog kev puas tsuaj

Lub hauv paus ntsiab lus ntawm kev sim tsis muaj kev puas tsuaj rau saum npoo ntawm LSAW steel yeeb nkab: kev ntsuam xyuas cov hmoov sib nqus yuav tsum siv rau cov khoom siv ferromagnetic steel yeeb nkab; Kev ntsuam xyuas nkag yuav tsum tau siv rau cov khoom siv tsis yog ferromagnetic steel yeeb nkab. Rau cov welded pob qij txha nrog ib tug nyiam ncua kev tawg, qhov chaw uas tsis yog-tshuaj ntsuam xyuas yuav tsum tau nqa tawm tom qab lub vuam tau txias rau ib lub sij hawm ntawm lub sij hawm; rau welded pob qij txha nrog ib tug nyiam kom reheat cracking, qhov chaw uas tsis yog-tshuaj ntsuam xyuas yuav tsum tau nqa tawm ib zaug tom qab vuam thiab tom qab kev kho cua sov. Daim ntawv thov ntawm qhov chaw tsis muaj kev puas tsuaj yog ua raws li tus qauv yuav tsum tau ua. Cov khoom tshawb nrhiav thiab kev siv feem ntau yog raws li hauv qab no:

(1) Kev tshuaj xyuas zoo ntawm cov khoom siv ntawm cov yeeb nkab.

(2) Tshawb xyuas qhov tsis xws luag ntawm lub pob tw tseem ceeb.

(3) Kev tshuaj xyuas qhov tsis xws luag ntawm qhov tseem ceeb fillet welds.

(4) Kev kuaj pom qhov tsis xws luag ntawm cov pob qij txha ntawm qhov tseem ceeb vuam thiab jumper tee ceg kav.

(5) Kev kuaj pom qhov tsis xws luag tom qab cov yeeb nkab dabtsi yog khoov.

(6) Cov khoom yog quenched thiab qhov zawj yog kuaj pom los ntawm qhov sib koom ua ke.

(7) Kev tshawb pom ntawm cov yeeb nkab uas tsis yog austenitic stainless hlau bevels uas nws tus qauv tsim kub qis dua lossis sib npaug rau rho tawm 29 degrees Celsius.

(8) Ob-sided weldment stipulates kev soj ntsuam ntawm cov hauv paus hniav tom qab cov hauv paus hniav ntxuav.

(9) Thaum lub vuam fixture ntawm cov yeeb nkab alloy uas muaj lub hardening nyiam yog txiav los ntawm oxyacetylene nplaim, kuaj pom qhov tsis xws luag ntawm qhov sib tsoo.

3.Radiation nrhiav thiab kuaj ultrasonic

Cov khoom tseem ceeb ntawm kev kuaj pom hluav taws xob thiab kev kuaj ultrasonic yog lub pob tw pob qij txha ntawm cov kav hlau ncaj nraim thiab cov pob qij txha ntawm pob tw welded yeeb nkab fittings. Cov txheej txheem kev kuaj tsis muaj kev puas tsuaj raug xaiv raws li cov ntaub ntawv tsim. Rau kev kuaj xyuas cov pob qij txha ntawm titanium, aluminium thiab aluminium alloys, tooj liab thiab tooj liab alloys, npib tsib xee thiab npib tsib xee alloys, yuav tsum siv txoj kev tshawb nrhiav hluav taws xob. Rau welds nrog ib tug nyiam ncua kev tawg, lub rays soj ntsuam thiab kuaj ultrasonic yuav tsum tau ua tom qab lub vuam tau txias rau ib lub sij hawm ntawm lub sij hawm. Thaum cov yeeb nkab tseem ceeb hauv lub casing muaj girth weld, lub vuam yuav tsum tau ua haujlwm nrog 100% kev soj ntsuam kab hluav taws xob, thiab kev ua haujlwm zais cia yuav ua tiav tom qab qhov kev ntsuas siab dhau lawm. Cov welded pob qij txha ntawm lub raj xa dej los ntawm lub nplhaib txhawb nqa los yog cov ntaub ntawv txhawb nqa yuav tsum yog 100% ray-tested thiab yuav tsum tau them tom qab dhau qhov kev xeem. Rau cov welds tau teev tseg rau kev soj ntsuam nruab nrab ntawm vuam, kev kuaj tsis muaj kev puas tsuaj yuav tsum tau ua tom qab kuaj pom. Kev kuaj hluav taws xob thiab ultrasonic yuav tsum tau ua tom qab kev sim tsis muaj kev puas tsuaj ntawm qhov chaw.

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