Cold laps and cold shuts are rejectable if they extend into the wall thickness beyond a shallow depth.
While modern NDT (Non-Destructive Testing) methods like radiography (MSS SP-54) or ultrasonic testing (MSS SP-94) look deep inside the metal, mss sp55 standard pdf work
The standard provides a uniform method for identifying surface irregularities to ensure parts meet quality requirements before they are put into service. Cold laps and cold shuts are rejectable if
– General surface texture irregularities. mss sp55 standard pdf work
Primarily external. Internal surfaces are usually covered by the purchaser's specification, but the standard can be invoked by contract.
Color and contrast are critical. Casting inclusions and oxidation appear differently under monochrome. Always print the plates in color or view them on a high-resolution color display.