hi..

I have got an opportunity to work in GRE Buried pipe line.
i would like to clarify below information

1)What are all equations are using( caesar ) to calculate the Suatined and Operating stresses as i could not find any equation in ISO 14692 whcih covering bending and torsion

2)please suggest me any guide lines to provide Anchor block/thrust block

3)Is it really necessary to provide anchor block near AG to UG interface,

4)what are all arpreacution to be taken near to valve pit and Fire hydren



Thanks