I-Surface NDT iindlela zemigaqo yokukhetha intsimbi yomthungo othe tye: umbhobho wentsimbi yamagnetic kufuneka usetyenziswe kuvavanyo lwe-particle magnetic;intsimbi engeyiyo i-ferromagnetic kufuneka isetyenziswe kuvavanyo lokungena.Ukulibaziseka ukuthambekela kokuqhekeka kwamalungu adityanisiweyo, umphezulu kufuneka ube luvavanyo olungonakalisi emva kokupholisa kwe-welding ixesha elithile;ukutshisa ngokutsha ukuqhekezwa kokuqhekeka kwamalungu adityanisiweyo, umphezulu kufuneka ube kuvavanyo olungonakalisi kunye nonyango lobushushu be-post-weld kanye nganye.

Umgangatho wezicelo zovavanyo ezingonakalisi ngokuhambelana neemfuno ezisemgangathweni ezibona izinto kunye nezicelo ngokubanzi ngolu hlobo lulandelayo:
(1) Indawo yangaphandle yokuhlolwa komgangatho wetyhubhu.
(2) Ubhaqo olubalulekileyo lwe-butt weld surface defect.
(3) Ukufunyanwa kwesiphako somgangatho wefayili ebalulekileyo.
(4) I-socket weld ebalulekileyo kunye ne-jumper tee yesebe lombhobho wokubona isiphene.
(5) Umbhobho ogoba umphezulu wokubona isiphene.
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(7) Ubushushu boyilo bungaphantsi kwe-zero okanye i-non-austenitic steel stainless steel pipe beveling efunyenwe ngama-29 degrees Celsius.
(8) Amalungiselelo e-weld-side weldment emva kokufunyanwa kwe-weld gouging gouging
(9) Xa usebenzisa i-oxyacetylene ilangatye lokusika i-jig welded imibhobho ye-alloy ukuqina ukuthambekela xa kugutyulwa ukubonwa kwesiphene.