Pre-stressed concrete pipe

A pre-stressed concrete pipe comprising;

• a metallic cylinder having a first end, a belled second end, and a plurality of threaded holes through said cylinder,
• a rolled annular ring having at least one threaded hole therein, with said rolled annular ring having an integral cup shaped O-ring recess,
• a joggled annular offset member embracing an inside diameter of said rolled annular ring,
• a first hermetic weld bead attaching said annular offset member to said rolled annular ring,
• a first resilient seal band partially stretched over and bonded onto an inner portion of said joggled annular offset member,
• said rolled annular ring, with said joggled annular offset member attached and said seal band bonded on said joggled offset member, is positioned within said metallic cylinder first end,
• a second hermetic weld bead connecting said rolled annular ring to said metallic cylinder first end,
• a strip of pressure sensitive tape affixed to a distal end of said seal band and simultaneously to said metallic cylinder,
• an annular formed hat member having a longitudinal inner portion and a longitudinal outer portion,
• a second resilient seal band stretched over and bonded onto said inner portion of said annular formed hat member,
• wherein said annular formed hat member with said second seal band bonded thereto is positioned within said metallic cylinder adjacent to said second end in communication with at least one threaded hole,
• a strip of pressure sensitive tape affixed to a distal end of said second seal band and simultaneously to said metallic cylinder,
• a third hermetic bead attaching said annular hat member outer portion to said metallic cylinder second end,
• a film layer of release agent adhered to said metallic cylinder on an inside diameter thereof,
• a cast concrete tube within said metallic cylinder,
• a pressurized solidifying compound disposed between said metallic cylinder and said concrete tube such that said concrete tube remains constantly in a tangential compressed state, and
• an O-ring seal positioned within a annular ring cup shaped O-ring recess.

A method of making a pre-stressed concrete pipe comprising the steps of;

• providing a metallic cylinder with a first end, a belled second end, and also a rolled annular ring having threaded holes therein,
• providing a joggled annular offset member,
• stretching a first resilient seal band partially over and bonding onto an inner portion of said joggled annular offset member,
• welding a first hermetic bead to said joggled annular offset member containing said first resilient seal band to an inside diameter of said annular ring,
• placing said rolled annular ring, with said joggled annular offset member attached, within said metallic cylinder first end,
• welding a second hermetic bead to said rolled annular ring and said metallic cylinder first end,
• adhering a strip of pressure sensitive tape to a distal end of said seal band and simultaneously to said metallic cylinder,
• providing an annular formed hat member,
• stretching a second resilient seal band over and bonding onto said annular formed hat member on a longitudinal inner portion thereof,
• positioning said annular formed hat member with said seal band bonded thereto within said metallic cylinder adjacent to said cylinder second end,
• welding a third hermetic bead to said annular hat member and to said metallic cylinder second end,
• applying a strip of pressure sensitive tape to a distal end of said seal band and simultaneously to said metallic cylinder,
• applying a film layer of release agent adhered to said metallic cylinder on an inside diameter thereof,
• casting a concrete tube within said metallic cylinder,
• applying a pressurized solidifying compound between said metallic cylinder and said concrete tube such that said concrete tube remains constantly in a tangential compressed state, and
• placing an O-ring seal positioned onto a seal ring cup within said rolled annular ring.

A pre-stressed concrete pipe comprising;

• a metallic cylinder having a first end, a second end, and a plurality of threaded holes through said cylinder,
• an annular formed hat member having a longitudinal inner portion and a longitudinal outer portion,
• a first resilient seal band stretched over and bonded onto said inner portion of said annular formed hat member,
• wherein said annular formed hat member with said first resilient seal band bonded thereto is positioned within said metallic cylinder ends in communication with at least one threaded hole, and each annular formed hat member with said seal band bonded thereto is positioned adjacent to said cylinder first end and said second end,
• a first hermetic bead attach said annular hat member outer portion to said metallic cylinder first end and to said metallic cylinder second end,
• a strip of pressure sensitive tape affixed to a distal end of said second seal band and simultaneously to said metallic cylinder,
• a film layer of release agent adhered to said metallic cylinder on an inside diameter thereof,
• a cast concrete tube within said metallic cylinder, and
• a pressurized solidifying compound disposed between said metallic cylinder and said concrete tube such that said concrete tube remains constantly in a tangential compressed state.