Hi folks,
Imagine that I have a 600# ASME B31.3 piping system with a minimum design temperature of -29°C. Now imagine that it is -35°C outside and the piping is also at that temp. If a person were to run low pressure steam through the pipe until the metal temperature reached -29°C, and then put the pipe into normal operation, would this be a violation of B31.3?
Same question, but now I have performed calculations for the Stress Ratio and applied the reduction in Figure 323.2.2B without doing impact testing?
Same question, but instead of actually performing the calculation, I use the arguement that with the low pressure steam, the Stress Ratio will be low enough that I can apply the reduction without performing the detailed calculations?
The goal here is, obviously, to avoid having to perform impact testing. This has been a point of contention between several different groups within my company for quite a while. I'd appreciate anyone's comments on the matter, especially if you are close to the committee members or have personal expereience. I'll probably be submitting a technical inquiry to ASME on the subject, but I don't expect a response in time for the project that I am working on...
Thanks in advance.
Imagine that I have a 600# ASME B31.3 piping system with a minimum design temperature of -29°C. Now imagine that it is -35°C outside and the piping is also at that temp. If a person were to run low pressure steam through the pipe until the metal temperature reached -29°C, and then put the pipe into normal operation, would this be a violation of B31.3?
Same question, but now I have performed calculations for the Stress Ratio and applied the reduction in Figure 323.2.2B without doing impact testing?
Same question, but instead of actually performing the calculation, I use the arguement that with the low pressure steam, the Stress Ratio will be low enough that I can apply the reduction without performing the detailed calculations?
The goal here is, obviously, to avoid having to perform impact testing. This has been a point of contention between several different groups within my company for quite a while. I'd appreciate anyone's comments on the matter, especially if you are close to the committee members or have personal expereience. I'll probably be submitting a technical inquiry to ASME on the subject, but I don't expect a response in time for the project that I am working on...
Thanks in advance.