For non metallic piping the following conflict in the Code confuses me and others.
ASME B31.3 at para A319.2.3 states
"No credit for cold spring is permitted in stress range calculations, or in calculating thrusts and moments.".
However A319.5 Reactions states:
"Paragraph 319.5 may be applicable if a formal stress
analysis can be shown to be valid for the specific case."
Para 319.5 gives methods for determining maximum reactions using % of cold spring.
The questions is: Does A319.5 then have precedence over A319.2.3?
I have been successfully using cold spring in relieving thrusts for thermoplastic piping for over thirty years. How do I go about influencing the ASME committee to revise A319.2.3 if it not overidden by A 319.5?
Can someone from the committee explain why cold spring can be used for metals and not for thermoplastics particlulary when the system is designed within the quasi elastic range of the materials?
Geoffrey D Stone FIMechE C.Eng;FIEust CP Eng
ASME B31.3 at para A319.2.3 states
"No credit for cold spring is permitted in stress range calculations, or in calculating thrusts and moments.".
However A319.5 Reactions states:
"Paragraph 319.5 may be applicable if a formal stress
analysis can be shown to be valid for the specific case."
Para 319.5 gives methods for determining maximum reactions using % of cold spring.
The questions is: Does A319.5 then have precedence over A319.2.3?
I have been successfully using cold spring in relieving thrusts for thermoplastic piping for over thirty years. How do I go about influencing the ASME committee to revise A319.2.3 if it not overidden by A 319.5?
Can someone from the committee explain why cold spring can be used for metals and not for thermoplastics particlulary when the system is designed within the quasi elastic range of the materials?
Geoffrey D Stone FIMechE C.Eng;FIEust CP Eng
