Dear All,
When carbon steel/LTCS material is used for ethylene plant piping these material is subjected to -104 Deg C as an alternate design temperature.
In this case the line should be checked for overstress with a stress factor of 0.3 as per ANSI B 31.3. I am finding difficulties in satisfying this condition in many cases which almost force me to go for stainless steel material.Is there any alternate method or satisfy this condition?