ONORM B 2597-1998 Ductile cast iron pipes and fittings for gas or water pressure pipe lines - Push-in joints with and without security device against longitudinal traction - Requirements and tests
1998ONORM B 2597-1998 Ductile cast iron pipes and fittings for gas or water pressure pipe lines - Push-in joints with and without security device against longitudinal traction - Requirements and tests