● Kolo ya chubu iliyonse imakhala yotalika mosalekeza popanda ma welds ozungulira.
● Koyilo ya chubu iliyonse imayesedwa ndi mphamvu ya hydrostatic.
● Mayesowa atha kuchitiridwa umboni pamalowa ndi oyang'anira gulu lachitatu (SGS, BV, DNV).
● Mayeso ena ndi eddy current test, chemicals, flattening, flaring, tensile, product, elongation, hardness for the material quality.