Difference Between Np2 and Np4 Pipes
Difference Between Np2 and Np4 Pipes Non-Pressure RCC Hume pipes of class 2 are known as light-duty Hume pipes used for sewers, irrigation, and light traffic culverts. Their thickness varies from 25 to 110 mm for 8cm dia and 2.2m dia respectively. for NP3 (medium duty) the thickness varies from 25 to 215mm for 8cm dia and 2.6m dia respectively....