kevlar49
Materials
- Jun 1, 2006
- 287
Since 1965, have there every been changes to the allowable stress safety factors in ASME VIII Div 2? The reason why I ask is that I am trying to apply API 579 Section 3 to develop a Temperature/Pressure envelope for start-up/shutdown of a reactor. According to API 579, if my vessel was made to Div 2, Temperature restrictions must be observed when I surpass the 30% MAWP value (8 ksi level). However, old (pre API 579) original documentation stated that the limit was closer to 25% MAWP but did not explain why.