LITTLE P.ENG. FOR ENGINEERING CONSULTANCY SERVICES

The ASME B31.3 Code provides four basic methods for the design of components for internal pressure, as described in para. 302.2: (a) Components in accordance with listed standards for which pressure ratings are provided in the standard, such as ASME BI6.5 for flanges, are considered suitable by ASME B31.3 for the pressure rating specified in the standard. Note that the other methods of pressure design provided in ASME B31.3 can be used to rerate such listed components and/or

Design conditions in ASME B31.3 are specifically intended for pressure design. The design pressure and temperature are the most severe coincident conditions, defined as the conditions that result in the greatest pipe wall thickness or highest required pressure class or other component rating. Design conditions are not intended to be a combination of the highest potential pressure and the highest potential temperature, unless such conditions occur at the same time. Although i