Ok, now I have conflicting recommendations. the only difference is I have class 2 material, not class 1 and my design temeperature is 250 F for one vessel and 650 F for the second vessel.
I understand Section UCS covers the post weld heat treatment requirements. My concern is any required preheat for welding and if that preheat has to be maintained until the weldment enters the furnace for PWHT. This I undersatnd has been required or recommended for certain chrome-moly grades to...
I am also trying to determine Kj for a flanged & flued expansion joint. From a copy of Design of Process Equipment (third edition), chapter 6 walks you thru a design. Since I only needed a value for Kj to input into my software I only calculated Fj from this book which is the force required to...