5. Method and Procedure for Tape Wrapping
5.1 Wrapping tape shall be extended to cover at least 300mm into above the grade level.
5.2 Before pipe lowering, the ditch bottom shall be grade and free from rock or the other foreign matter that can be damage the wrapping material.
5.3 Pipe shall be lowered carefully into the ditch to avoid wrapping material damage.
5.4 During back-filling shall be ensured that the rocks and debris will not strike and damage the wrapping material.