Surface NDT txoj kev ncaj seam steel xaiv cov hauv paus ntsiab lus: cov hlau nplaum hlau yuav tsum tau siv rau hauv cov khoom sib nqus;non-ferromagnetic steel yuav tsum tau siv rau hauv kev ntsuam xyuas nkag.Kev ncua kev sib tsoo ntawm cov pob qij txha welded, qhov saum npoo yuav tsum tsis muaj kev puas tsuaj tom qab vuam txias qee lub sijhawm;reheat cracking nyiam ntawm cov pob qij txha welded, qhov saum npoo yuav tsum nyob rau hauv kev sim tsis muaj kev puas tsuaj thiab tom qab vuam kev kho cua sov ib zaug.

Daim ntawv thov kev soj ntsuam tsis muaj kev puas tsuaj raws li cov qauv kev cai uas kuaj pom cov khoom thiab kev siv feem ntau raws li hauv qab no:
(1) Ib qho chaw sab nrauv ntawm lub raj cov khoom siv tshuaj xyuas zoo.
(2) Qhov tseem ceeb pob tw weld nto defect nrhiav pom.
(3) Qhov tseem ceeb fillet nto defect nrhiav pom.
(4) Lub qhov (socket) tseem ceeb weld thiab jumper tee ceg yeeb nkab tsis raug kuaj pom.
(5) Cov yeeb nkab dabtsi yog khoov qhov chaw kuaj pom.
(6) Cov khoom nyhav rau quench nrhiav kom tau loj dua groove welded pob qij txha.
(7) Tus qauv tsim kub qis dua xoom lossis tsis yog austenitic stainless hlau yeeb nkab beveling kuaj pom 29 degrees Celsius.
(8) Cov kev cai ntawm ob-sided weldment tom qab weld gouging gouging nrhiav pom
(9) Thaum siv oxyacetylene nplaim taws txiav jig welded kav hlau alloy hardening nyiam thaum sib tsoo qhov chaw tsis raug.