Casing spacers shall be a two piece shell made from 14 gauge mild
steel. Each shell section shall have a flange with a minimum of three 5/16-inch
steel bolts for eight inch wide and four for twelve inch wide spacers.
Each shell shall be lined with a ribbed PVC extrusion with a retaining ridge that
overlaps the shell to prevent slippage. Runner surface shall be UHMW polymer for
abrasion resistance and a low coefficient of friction.
The runners and risers shall be attached at appropriate positions to properly support
the carrier pipe within the casing and to ease installation. The runners shall be
attached mechanically with bolts and the bolt heads TIG welded for strength.
The spacers shall be galvanized, painted, or epoxy coated depending on specific job specifications.
Standard positioning within the casing will require the height of the runners and risers to
be sufficient to provide clearance between the casing and the outside diameter of the bell
or restrainer. Centered positioning within the casing will require the runners and
risers to place the carrier pipe in the center of the casing and to provide a maximum clearance
of 1-inch to the top of the casing.
