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Understanding PACP Deformed Flexible Codes

This installment focuses on the proper use of the Deformed Flexible Code.

It is important to know the type of material that the pipe is made of, to determine if it is flexible, designed to deform before breaking, or rigid in construction.

The codes are further described using a Modifier as follows:

  • A Bulging Round (BR), where one or more rounded projections protrude into the pipe.

  • A Bulging Inverse Curvature (BI), where an inward bulge is sharp crested taking on the shape of a heart point or shark fin.

  • Creasing (C), where an outward folding of pipe wall in the longitudinal direction creates a crease in the wall of the pipe.

  • Elliptical (E), where the round pipe is compressed into an elliptical or oval shape.

There may not be any other signs of Structural defects (Cracks, Fractures) visible. When coding, one or two clock positions are required, depending on the size of the Bulge. If other Structural defects are present, they should be coded along with the deformed code as they are a sign of more significant structural distress. All other codes, O&M, Construction and Miscellaneous should also be coded.


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