The only difference WRT to PDMS is, while taking MTO the elbow’s fall under Fitting's MTO and the bend’s will be a counted as part of the pipe and the length will be added to the pipe it self
The only difference WRT to PDMS is, while taking MTO the elbow’s fall under Fitting's MTO and the bend’s will be a counted as part of the pipe and the length will be added to the pipe it self