"Castings shall meet the visual acceptance criteria of MSS SP-55, Class B, unless otherwise specified."
Before this standard existed, one inspector might see a small ridge and call it a "surface irregularity," while another might call it a "fatal flaw." MSS SP-55 brought order to this chaos by categorizing surface issues into 12 distinct types The Deal-Breakers Type I (Hot Tears and Cracks) mss sp55 standard pdf work
Clean the casting. Remove rust, paint, or scale. The surface must be dry and free of loose debris. "Castings shall meet the visual acceptance criteria of
: It is important to note that this standard is for visual (surface) inspection only . It does not replace internal inspection methods like Radiographic Testing (RT) or Ultrasonic Testing (UT), which are needed to find sub-surface defects. : It is important to note that this
Type IV: Internal Chills and ChapletsMetal supports used during the casting process that fail to fuse completely with the molten steel.