Uxinzelelo olushiyekileyo lombhobho we-LSAW lubangelwa ikakhulu kukupholisa okungalinganiyo.Uxinzelelo olushiyekileyo luxinzelelo lwangaphakathi lwesigaba sokulingana ngaphandle kwamandla angaphandle.Olu xinzelelo lwentsalela lukhona kumacandelo ashushu aqengqelekayo amacandelo ahlukeneyo.Inkulu ubukhulu becandelo lentsimbi yecandelo eliqhelekileyo, ngakumbi uxinzelelo olushiyekileyo.
Nangona uxinzelelo olushiyekileyo luzilungelelanisa, lusenempembelelo ethile ekusebenzeni kwamalungu ensimbi phantsi kwamandla angaphandle.Ngokomzekelo, inokuba nemiphumo emibi kwi-deformation, ukuzinza kunye nokumelana nokukhathala.Emva kwe-welding, i-non-metallic inclusions kwipayipi ye-LSAW igxininiswe kumaphepha amancinci, okubangela ukuba i-lamination.Emva koko i-lamination iwonakalise kakhulu ukusebenza kombhobho we-LSAW ecaleni kobunzima, kwaye ukukrazuka kwe-interlayer kunokwenzeka xa i-weld icutheka.Uxinzelelo lwasekhaya olubangelwa yi-weld shrinkage kaninzi amaxesha amaninzi obunzima benqaku lesivuno, elikhulu kakhulu kunolo olubangelwa ngumthwalo.Ukongeza, umbhobho we-LSAW ngokuqinisekileyo uya kuba ne-T-welds eninzi, ngoko ke amathuba okuba neziphene ze-welding ziphuculwe kakhulu.Ngaphezu koko, uxinzelelo lwe-welding residual kwi-T-weld lukhulu, kwaye isinyithi se-weld sihlala sikwimeko yoxinzelelo lwe-dimensional-dimensional, okwandisa amathuba okuqhekeka.
I-welding seam ye-spiral submerged arc welded pipe isasazwa kumgca we-spiral, kwaye ii-welds zinde.Ngokukodwa xa i-welding phantsi kweemeko eziguquguqukayo, i-weld ishiya indawo yokwenza ngaphambi kokupholisa, ekulula ukuvelisa i-welding hot cracks.Isalathiso sokuqhekeka sihambelana ne-weld kwaye senza i-angle edibeneyo kunye ne-axis yentsimbi yombhobho, ukuthetha ngokubanzi, i-angle iphakathi kwe-30-70 °.Le engile ihambelana nje ne-engile yokungaphumeleli kwe-shear, ngoko ukugoba kwayo, i-tensile, i-compressive kunye ne-anti-twist iipropati azilunganga njengombhobho we-LSAW.Kwangaxeshanye, ngenxa yokuncitshiswa kwesikhundla se-welding, i-saddle kunye ne-fish ridge welding seam ichaphazela ukubonakala.Ngoko ke, i-NDT ye-SSAW i-weld welds kufuneka iqiniswe ukuqinisekisa umgangatho we-welding, ngaphandle koko umbhobho we-SSAW akufanele usetyenziswe kwiimeko ezibalulekileyo zesakhiwo sensimbi.
Ixesha lokuposa: Jul-13-2022