a) The masses determined as described above will conform to the calculated masses as specified herein(or adjusted calculated masses) for the end-finish specified on the purchase agreement, within the tolerances stipulated in next blank.
b) Calculated masses shall be determined in accordance with
Ml = (Mpe *L) + em
(1) Ml is the calculated mass of a piece of pipe of length L, in kilograms (pounds);
(2) Mpe is the plain-end mass, in kilograms per meter(pounds per foot);
(3) L is the length of pipe, including end-finish, in metres (feet),
(4) em is the mass gain or loss due to end-finishing, in kilograms (pounds),Here it equals to 13.97kg or 30.80lb.