Since the introduction of ASME Section VIII, Division 2 in 1968, a design basis document called a Users Design Specification (UDS) has been a Code requirement. The original requirements from 1968 were rather sparse. So, when Division 2 was re-written and issued in 2007, it was decided to expand the requirements to encompass all of […]
Since the introduction of ASME Section VIII, Division 2 in 1968, a design basis document called a Users Design Specification (UDS) has been a Code requirement. The original requirements from 1968 were rather sparse. So, when Division 2 was re-written and issued in 2007, it was decided to expand the requirements to encompass all of […]
Bellows vendors will often quote two different cycle lives for their bellows. One is in accordance with ASME B31.3, Appendix X. The other is in accordance with the Standards of The Expansion Joint Manufacturers Association. The latter provides a significantly higher cycle life. The EJMA bellows fatigue curve is a best fit curve based on […]
The simple answer to this question is they should be used when the owner selects the use of these rules for a particular piping system. Note that the definition of High-Pressure Fluid Service simply requires that the owner specify use of Chapter IX. However, it is probably useful to understand why such a selection may […]
ASME B31.3 provides rules for Category M Fluid Service in Chapter VIII of the Code. These rules are designed to provide additional measures of leak tightness. For example, special precautions to prevent leakage past valve stems are included and a sensitive leak test designed to find even very small leaks in the system is required. […]
In addition to the many clarifications, updated references to codes and standards, updates to basic allowable stresses, and added listed materials, there are several substantive changes to the 2012 Edition of ASME B31.3, Process Piping. These changes are: Category D Fluid Service The definition was revised to include piping with design minimum temperatures below -29⁰C […]
