Hydrostatic steel liners are designed and built in house at our Morgantown, West Virginia facility. Steel casing is rolled to the desired diameter generally in 30’ - 40’ lengths. Then stiffener rings are welded to the OD of the casing to give the added strength necessary for the entire casing string to be hydrostatic. By optimizing casing wall thickness with the size and number of stiffener rings required we can offer the safest and most economical lining systems available for shafts up to 8’ and 10’ ID. For shafts in excess of 10’ diameter, concrete liners are generally more economical.

 Steel liners are installed from the surface down, by a simple stack and weld procedure. Due to the weight involved with large, deep liners, it is preferable to "float" the liner into place. This is done by bolting a steel bulk head to the bottom joint and leaving the hole full of water while the liner is being lowered into place. By calculating the exact buoyancy of the liner, and adding water to the ID as required, the liner almost lowers itself into position. This method reduces the risk of failure of both the hoisting equipment and the liner itself to a minimum making it the safest means for installing these liners.