API 510 - Annex -A

Question 1

The following classes of containers and pressure vessels are excluded from the specific requirements of this inspection code,

Answer 1

• vessels on movable structures
• Fired process tubular heaters
• vessels that are integral parts of rotating or reciprocating mechanical devices
• Vessels with an internal or external design pressure that cannot exceed 15 psig
• Vessels with an inside diameter not exceeding 6 in
• 5 ft3 (0.141 m3) in volume and 250 lbf/in.2
• 5 ft3 (0.141 m3) in volume and 250 lbf/in.2
• 1 1/2 ft3 (0.042 m3) in volume and 600 lbf/in.2