Historical
ISO 3126:1974
Plastics pipes -- Measurement of dimensions
Specification of the measuring apparatus and procedure to be used for the determination of the dimensions of plastics pipes. Following dimensions are to be determined: Wall thickness at any point (precision 0,05 mm), mean outside diameter (rounded to nearest 0,1 mm) and outside diameter at any point (rounded to 0,1 mm).
International Organization for Standardization [iso]