The following chart lists different types of equipment and the frequency of boiler testing requirements.
For frequency and testing requirements concerning unfired pressure vessels, refer to NAVFAC MO-324.
Table 12-1(B). - Boiler Inspection and Test Frequencies
1. Additionally, MUSE boilers and other portable boilers must be inspected externally and internally and certified each time they are moved from one place to another. A MUSE steam coil type of boiler is exempt from annual inspections while in dry or wet lay-up.
2. All manhole and handhole gaskets must be replaced after a strength test unless they are made of non-compressible steel.
The activity that operates and maintains pressure vessels provides all of the material and labor required to prepare the vessels for inspection. You need to help the inspector during inspection. An inspection on pressure vessels located on a naval base in a foreign country must comply with NAVFAC MO-324, Inspection and Certification of Boilers and Unfired Pressure Vessels.
Regular waterside inspection of boiler tubes provides the information required to determine the effectiveness of water treatment, maintenance procedures, diagnoses of boiler operating troubles, and in general an overall condition of the boiler.
Tube failures generally occur in the outer half of the tube nest from external corrosion just above the water drum. When such failures have occurred, either in operation or underContinue Reading