BA 1200 INJ, a machine developed by IPM for the in-line belling by injection moulding of double wall PP, PE and ultrarib-type corrugated pipes, recently completed a Unicor corrugation line to be delivered to an Arab processor. This model - it is the largest in the  INJ series developed by this company from Lugo (near Ravenna, Italy) in collaboration with the University of Bologna and the Italian Plastics Institute - can be used to process pipes with  outer diameters ranging from  315 to 1200 mm, ensuring high dimensional stability of the bell, even at widely differing ambient temperatures.