First, the head billet should be fed into the furnace when the furnace temperature is more than 600℃, and then heated with the furnace. Second, several head billets are allowed to be heated at the same time, but the distance between billets must be paid attention to when loading the furnace. The distance between billets of low advantage layer and the bottom of the furnace should not be less than 150mm, and the loading quantity should not exceed 5 pieces according to the heating furnace. Third, when the head is loading, it is necessary to ensure that the material mark in the billet under the surface, so that stamping exposed to the surface. When the head forming and manhole flanging are carried out in two processes, pay attention to placing the marking center of the billet is punched on the outer surface of the blank, so as to find the right direction when cutting manhole flanging holes after head forming.

       Common head in the welding into welding head, socket welding head. Applied to all kinds of pressure vessels, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment. Material has carbon steel（A3、20#、Q235、Q345B、16Mn,etc.）, stainless steel（304、321、304L、316、316L,etc.）, alloy steel（15Mo3 15CrMoV 35CrMoV 45CrMo ）, aluminium, titanium, copper, nickle and nickle alloy, etc.