Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is ___________________? / Chemical Engineering / Q&A, MCQs / Q&A / By admin Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is ___________________? A. More B. LessĀ (Correct) C. Same D. Either A. or B.; depends upon the I.D. of the pipe