Corrosion allowance for wrought steel pipe (CS, LAS & LTCS) is mostly taken 3 mm and zero mm for stainless steel pipes.The flowing fluid could be corrosive and toxic in nature per the process requirement.Pressure and temperature may differ from line to line.The pressure and temperature for the line are available in the line list.You can get line size from the line list or P&ID.Manufacturing type (seamless or welded) is decided upon the line size and the process requirements.The material engineer decides the pipe material type per fluid nature and design conditions.The corrosion allowance of the pipe material is decided by the process department.(Considering 1 cycle each day the total number of cycles in 20 years = 20*360=7200 cycles). Any plants (mainly process plants) are mainly designed for 20 years or 7200 cycles.Important Points to know for Pipe thickness Calculationīefore starting the pipe thickness calculation, we (the piping engineers) must know the following points. Representation of the Different Thicknesses Available in the Pipe.Formula for Pipe Wall Thickness Calculation.Input Required for Pipe Thickness Calculation.Important Points to know for Pipe thickness Calculation.
