Boiler punching head

The perforated head and the perforated head of the boiler are just different in name, they are actually the same thing. It is widely used in various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation equipment. Boiler perforated heads are made of carbon steel (A3, 20 #, Q235, Q345B, 16Mn, etc.), stainless steel (304, 321, 304L, 316, 316L, etc.), alloy steel (15Mo3, 15CrMoV, 35CrMoV, 45CrMo), aluminum, titanium, copper, nickel, and nickel alloys. Punched head, perforated head execution? JB/T4746-2002 "Head for Steel Pressure Vessels" (replaced by JB576-64 "Disc Head", JB/T4739-95 "Elliptical Head", JB/T4738-95 "90 Fold Conical Head", JB/T4739 95 "60 Fold Conical Head", JB/T4729-94 "Spinning Head" and other standards) is strictly constructed.