Classification
Pipes have been classified in this standard as LA, A and B according to their thickness. Class LA pipes have been taken as basis for evolving the series of pipes. Class A allows a 10 percent increase in thickness over Class LA. Class B allows a 20 percent increase in thickness over Class LA. For Special uses, Classes C, D, or E may be derived after allowing corresponding increases of thickness of 30, 40 or 50 percent respectively.

Pressure Pipes Special Aspects

Pressure Pipes Testing at Works
Mechanical Test – Mechanical tests shall be carried out, during manufacture. Tests for every four hours of production shall be conducted. The results obtained shall be taken to represent all the pipes of all sizes made during that period.

Classification
Pipes have been classified in this standard as LA, A and B according to their thickness. Class LA pipes have been taken as basis for evolving the series of pipes. Class A allows a 10 percent increase in thickness over Class LA. Class B allows a 20 percent increase in thickness over Class LA. For Special uses, Classes C, D, or E may be derived after allowing corresponding increases of thickness of 30, 40 or 50 percent respectively.

Pressure Pipes Special Aspects

Pressure Pipes Testing at Works
Mechanical Test – Mechanical tests shall be carried out, during manufacture. Tests for every four hours of production shall be conducted. The results obtained shall be taken to represent all the pipes of all sizes made during that period.