1. Cov tsos mob soj ntsuam ntawmluj tshib fittings: Feem ntau, kev tshuaj xyuas qhov muag yog txoj hauv kev tseem ceeb. Los ntawm kev tshuaj xyuas cov tsos, nws pom tau tias qhov zoo li qhov tsis xws luag ntawm welded luj tshib yeeb nkab fittings tau kuaj pom los ntawm 5-20 npaug ntawm lub iav tsom iav qee zaum. Xws li undercut, porosity, weld hlaws, nto tawg, slag inclusion, vuam nkag, thiab lwm yam. Tag nrho qhov ntev ntawm weld kuj yuav ntsuas los ntawm weld detector los yog template.

2. NDT rau lub luj tshib fittings: xyuas qhov tsis xws luag xws li slag inclusion, cua qhov thiab tawg nyob rau hauv lub vuam. Kev kuaj X-ray yog siv X-ray los thaij duab ntawm lub vuam, raws li cov duab tsis zoo los txiav txim seb puas muaj qhov tsis xws luag hauv qhov vuam, tus naj npawb thiab hom kev puas tsuaj. Tam sim no, X-ray kuaj, kuaj ultrasonic thiab kuaj magnetic yog siv dav. Tom qab ntawd raws li cov khoom tsim nyog, txiav txim siab seb lub vuam puas tsim nyog. Nyob rau ntawm no, lub reflected nthwv dej tshwm ntawm qhov screen. Los ntawm kev sib piv thiab txheeb xyuas cov nthwv dej uas cuam tshuam thiab nthwv dej ib txwm muaj, qhov loj thiab qhov chaw ntawm qhov tsis xws luag tuaj yeem txiav txim siab. Kev kuaj ultrasonic yog qhov yooj yim dua li kev kuaj X-ray, yog li nws tau siv dav. Txawm li cas los xij, kev kuaj ultrasonic tsuas yog txiav txim los ntawm kev ua haujlwm thiab tsis tuaj yeem tawm hauv lub hauv paus ntawm kev tshuaj xyuas. Thaum lub ultrasonic beam kis mus rau cov hlau cua interface, nws yuav refract thiab dhau los ntawm lub vuam. Yog tias muaj qhov tsis xws luag hauv qhov vuam, lub nqaj ultrasonic yuav raug cuam tshuam los ntawm kev sojntsuam thiab dais. Kev tshuaj xyuas cov hlau nplaum kuj tseem siv tau rau cov teeb meem sab hauv thiab cov kab nrib pleb me me tsis sib sib zog nqus ntawm qhov chaw vuam.

3. Mechanical khoom kuaj ntawm lub luj tshib fittings: nondestructive testing yuav nrhiav tau inherent defects ntawm weld, tab sis nws tsis tuaj yeem piav qhia txog cov khoom ntawm cov hlau hauv tshav kub cuam tshuam ntawm weld. Qee zaum tensile, cuam tshuam thiab dabtsi yog khoov kuaj yog xav tau rau cov pob qij txha welded. Cov kev sim no tau ua tiav ntawm lub rooj tsavxwm. Lub phaj xeem yuav tsum tau welded nrog lub longitudinal seam ntawm lub tog raj kheej kom ntseeg tau tias tib yam kev tsim kho. Tom qab ntawd cov khoom siv hluav taws xob ntawm cov phaj xeem raug kuaj. Hauv kev tsim tawm, tsuas yog qhov sib koom ua ke ntawm cov qib steel tshiab tau sim hauv qhov kev hwm no.

4. Hydrostatic test thiab pneumatic xeem ntawm lub luj tshib fittings: rau lub siab hlab ntsha uas yuav tsum tau muab kaw, hydrostatic test thiab pneumatic xeem yuav tsum tau mus xyuas lub sealing thiab siab bearing peev xwm ntawm welds. Txoj kev yog txhaj cov thawv rau hauv lub siab ua haujlwm ntawm cov dej los yog 1.25-1.5 npaug ntawm kev ua haujlwm siab ntawm cov pa roj (feem ntau ntawm cov huab cua) rau ib lub sijhawm, tom qab ntawd tshawb xyuas lub siab poob hauv lub thawv, thiab tshawb xyuas seb puas muaj. yog tej yam tshwm sim to, thiaj li txiav txim siab seb lub weld puas tsim nyog.