20.00  PRODUCION LINES FOR HEATING ELEMENTS FOR BOILERS

                    

20.10   Preparation of the thermostat-holder tubes
20.20   Bending - Preparation
20.30  Assembly of flange - heating element - thermostat-holder tube	Mod. 170/75
20.40   Brazing	See chapter       12.00
20.50   Drying
20.60   Sealing	See chapter       11.00
20.70   Manual annealing on sections of element	See chapter         6.30
20.80   Finishing
20.90   Final electrical tests