1.Basic zvinodiwa pakuonekwa kweLSAW welds

Pamberi pekuedzwa kusingaparadzi kweLSAW simbi mapaipi, kuongororwa kwekuonekwa kwe weld kuchasangana nezvinodiwa. Izvo zvinowanzodiwa pakuonekwa kweLSAW welds uye pamusoro pehutano hwemajoini akasungwa ndeaya anotevera: kutaridzika kweweld kunofanira kuumbwa zvakanaka, uye hupamhi hunofanira kuva 2 mm padivi pamucheto we groove. Kureba kwefillet ye fillet weld kuchaenderana nemirairo yekugadzira uye chimiro chichava shanduko yakanaka. Pamusoro pejoint welded inofanira kunge iri:

(1) Kutsemuka, kusina kusanganiswa, pores, slag inclusions, uye splashes hazvibvumirwi.

(2) Mapombi, simbi isina tsvina uye alloy simbi pombi weld nzvimbo ine tembiricha yekugadzira yakaderera pane -29 madhigirii haizove nepasi. Zvimwe zvinhu pombi weld seam undercut kudzika kunofanirwa kunge kwakakura kupfuura 0.5mm, kuenderera kurefu kwepasi hakufanirwe kudarika 100mm, uye kureba kwese kwepasi pamativi ese e weld hakupfuuri 10% yehurefu hwakazara hweweld. .

(3) Nzvimbo ye weld haizove yakaderera kupfuura pamusoro pepombi. Iyo weld bead kureba hakupfuuri 3mm (hupamhi hwepamusoro hweboka rakasungwa rekubatana kune bevel rekumashure).

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2.Surface isiri-inoparadza kuedza

Nheyo yekusaparadza nzira yekuyedza yepasi peLSAW simbi pombi: magineti poda yekuyedza inofanirwa kushandiswa kune ferromagnetic zvinhu simbi pombi; kuyedza kupinda kunofanirwa kushandiswa kune isiri-ferromagnetic zvinhu simbi pombi. Kune majoini akasungwa ane tsika yekunonoka kuputika, iyo yekumusoro isiri-inokuvadza inspection ichaitwa mushure mekunge welding yatonhodzwa kweimwe nguva yenguva; kune welded majoini ane tsika yekudzoreredza kuputika, iyo yepamusoro isiri-inoparadza yekuongorora ichaitwa kamwe chete mushure mekuputika uye mushure mekupisa kupisa. Iko kushandiswa kwepamusoro kusingaparadze kuyedzwa kunoitwa zvinoenderana nezvinodiwa zvakajairwa. Izvo zvinoonekwa zvinhu uye mashandisirwo anowanzo seanotevera:

(1) Kuongororwa kwemhando yekunze kweiyo pombi zvinhu.

(2) Kuonekwa kwekuremara kwepamusoro kweakakosha butt welds.

(3) Kuongororwa kwekuremara kwepamusoro kweakakosha fillet welds.

(4) Kuonekwa kwekuremara kwepamusoro kwemajoini akaiswa welding akakosha socket welding uye jumper tee bazi pombi.

(5) Kuonekwa kwekuremara kwepamusoro mushure mekukotama kwepombi.

(6) Izvo zvinhu zvinodzimwa uye groove inoonekwa neyakasungwa yakasanganiswa.

(7) Kuonekwa kweasiri-austenitic Stainless simbi pombi mabhero ane tembiricha yekugadzira yakadzikira kana kuenzana nemaminus 29 degrees Celsius.

(8) Weldment yakapetwa kaviri inorayira kuongororwa kwemidzi mushure mokunge midzi yacheneswa.

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3.Radiation yekuona uye kuongorora kwe ultrasonic

Zvinhu zvikuru zvekuonekwa kwemwaranzi uye ultrasonic kuyedzwa ndiwo majoini emapaipi esimbi akatwasuka uye majoini ebutt welded pombi fittings. Nzira dzekuedza dzisingakuvadzi dzinosarudzwa maererano nemagwaro ekugadzira. Pakuonekwa kwemajoini akasungwa etitanium, aruminiyamu nealuminium alloys, mhangura nemhangura alloys, nickel uye nickel alloys, nzira yekuona radiation inofanirwa kushandiswa. Kune ma welds ane tsika yekunonoka kupaza, iyo ray yekuongorora uye ultrasonic bvunzo ichaitwa mushure mekunge welding yatonhora kwenguva yakati. Kana iyo pombi huru mune casing ine girth weld, iyo weld ichashandiswa ne 100% ray yekuongorora, uye yakavanzika oparesheni inogona kuitwa mushure mekumanikidzwa kwekuedzwa kwapfuura. Majoini akasungwa papombi akafukidzwa nemhete yekusimbisa kana pedhi yetsigiro ichave yakaongororwa ray-100% uye ichavharwa mushure mekupasa bvunzo. Kune ma welds akatsanangurwa yepakati kuongororwa kwewelding, bvunzo dzisiri dzekuparadza dzichaitwa mushure mekutarisa kwekuona. Radiographic uye ultrasonic kuyedzwa kuchaitwa mushure mekusaparadza kuyedzwa kwepasi.

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