vacuum sealing may occur within a vacuum chamber alternately or additionally after fitting of joint end plates 24 a 24 b to outer pipe 28 and inner pipe 26 one or more small hole 29 in joint end plate 24 a may be used to permit air to be withdrawn from insulation space 25 hole s 29 may then be sealed to maintain the vacuum within insulation space 25 the vacuum within insulation space 25 may be created by other means known in the art without departing from the scope hereof fig2 b shows a perspective view of pipe joint 20 of fig2 a once assembled pipe joint 20 may also include a pipe stop 22 as shown in fig2 b that prevents pipe section 10 from passing more than halfway through pipe joint 20 during insertion pipe section 10 and pipe joint 20 may be attached using pipe adhesive or other methods known in the art the method employed may be selected to prevent thermal leakage pipe stop 22 may protrude at least partially along the circumference of inner pipe 26 in the center of pipe joint 20 in other embodiments pipe stop 22 may be formed as a gradual reduction in the diameter of inner pipe 26 towards the center of inner pipe 26 fig3 shows one exemplary pipe system 100 with two pipe sections 10 labeled 10 1 and.