Apparatus and methods for joining similar pieces of plastic
pipe includes using the shape memory of the
pipe pieces to slightly deform a “female” end to permit
insertion therein of a non-deformed male end. The deformation is sufficient to permit the
insertion but not so large as to preclude the substantially complete “
recovery” of the female end's shape and size, using the “shape memory” of the
pipe material. Embodiments include, without limitation, single-walled (or mono-walled) pipe, pipe formed from multiple material
layers, corrugated pipe, flat-walled pipe, and others. Preferred tools and apparatus are disclosed for stretching the female end and maintaining the desired stretch during transportation and storage, for sealing the joint (via
adhesive /
sealant,
flange gasket, O-ring, or the like), and for further protecting the resulting joint.