Cast Iron Drying Cylinder

[BuddyL]

I'm going to do a MT inspection on the shell surface of a Yankee Dryer. Is there a guideline on surface imperfections and cracking that can help me determine what is normal, minor, or in need of more inspection? Same thing for around the head bolts.

 

[metengr]

Use the National Board Inspection Code, Part 2 Supplement 5.