Is it possible to cold bend the pipe and follow the curvature of the trench on site during pipe laying installation?

• Yes! Provided that:
  a. the radius of curvative shall not be less than 300 times the outside diameter
  of the pipe being installed.
  
  b. The hub and curvature of the pipe shall be properly supported by thrust block as prescribed in the standard procedure/practice in Pipe laying/installation.