Most nonporous materials (steel stainless steel cast iron aluminum brass bronze titanium rubber plastics and glass) can be examined using PT. Porous materials (concrete wood paper cloth and some types of fiberglass if the fibers are exposed to the surface) should not be examined using PT.
Viewed from back of boiler 9. Refill boiler. Refer to Frame 36. Check operation of boiler. Refer to Frames 45 & 46. ESPRIT 2 - Installation and Servicing... Page 53 Viewed from back of boiler 8. Refill the boiler. Refer to frame 36. Check for leaks around the new air vent joint. 9. Check the operation of the boiler. Refer to Frames 45 & 46.
The water tube boiler is made from several components such as the HP Drum finned Tubes Headers Tube Bundle Stack Damper Silencer Deaerator etc. For more detailed information about water tube boiler shop inspection review the following articles: Third Party Inspection for Water Tube and Plan for Water Tube
2.1 Hourly ratings. Steel fire doors are rated by time (in minutes or hours) that a door can withstand exposure to fire test conditions. Hourly ratings include 1-1/2-hours 1-hour 3/4-hour and 1/3-hour with the maximum rating required of any swinging type fire door being three hours.