An emergency repair closure contains three basic parts: two closure pieces (one spigot to plain steel end and one plain steel end to bell) and one split welding sleeve or mechanical style sleeve. A make-up short pipe (spigot to bell) is also available if required. The normal lay length of the combination of these parts equals that of a standard pipe typically, 7.315m (24ft.). However other lengths and adaptors (C300, C303, etc.) are also available as required. This type of closure may be installed in either a restrained or non-restrained area of a pipeline. An inventory of emergency closures are stocked in all diameters 60 inches or less.

The 7 steps to replacing a concrete pressure pipe section are as follows:

• 1. Excavate the area around the damaged section of concrete pressure pipe to adequately expose its entire length.
  


• 2. Cut out a section from the damaged pipe and remove both the bell and spigot ends. The cylinder can be cut with an acetylene cutting torch, carbide-tipped circular saw or a pneumatic spade. Remove the damaged section carefully to avoid harming the adjoining pipe.
  


• 3. Clean off the bell and spigot joint areas of the adjoining pipe sections. Lubricate and place a new gasket in the spigot groove of the closure piece. Install closure by aligning between adjacent piping and pulling the joint home (using a come-along).
  


• 4. Slide sleeve assembly on plain steel end of closure piece installed. Before continuing lubricate and place a new gasket in the spigot of the adjoining pipe.
  


• 5. Lower the second closure piece carefully and align it with both the plain steel end of the closure piece installed and the spigot of the adjoining pipe. Install closure piece by using a come-along to pull the bell ring over the spigot of the adjoining pipe.
  


• 6. Align plain steel ends of both closure pieces and slide sleeve over gap between ends. Weld sleeve to both plain steel ends around entire circumference (for mechanical sleeves (flexible couplings), install and tighten all bolts).
  


• 7. After sleeve or coupling is secured, pressurize the line and check for leaks. Once testing is complete and the main is back in service, encase the exposed metal components of the closure to provide corrosion protection. Then diaper and grout the other joints.