Section VI Recommended Rules for care of Heating Boilers
Section VII Recommended Rules for care of Power Boilers
Section VIII Pressure Vessels
Section IX Welding & Brazing Qualifications
Code Defines
Code defines the material used in the construction of the vessels, construction method, strength, and safe pressure calculations.
Code Limitations
Code only gives the vessel and its appurtenances but no details of the connections provided for attachment to piping external to vessel.
Criteria for Pressure Vessels
Criterion for pressure vessels is given as follows:
Thin-walled
t < 1/10 (Rin)
Thick-walled
t >1/10 (Rin)
Pressure vessels Testing
Pressure vessels are tested as a part of the certification requirements. Normally Pressure vessels are filled with liquids such as water and then are tested for pressure and for leakage. The recommended testing pressure for a vessel is given by the following formula:
Applications of Pressure Vessel in Power Plants
The majority of vessels in nuclear power plants are classified as Unfired Pressure vessels. The main steam generators in the primary heat transport system in the nuclear power plants are examples of unfired steam boilers. In thermal power plants, water heaters , steam drum, mud drums, and pressure tanks are pressure vessels. Pressure vessels are tested as a part of the certification requirements. Normally Pressure vessels are filled with liquids such as water and then are tested for pressure and for leakage.[bws_pdfprint]