The carbon steel butt welding head is the final cover of the pressure vessel, which is an important pressure-bearing component and plays a sealing role. The carbon steel butt welding head is one is to make the top and bottom bottom of the pressure vessel tank, and the other is that the pipe is at the end, and it is not ready to extend forward, then use a head to seal the pipe in the form of a weld. Products with head-like functions have blinds and caps, and the screwed blinds and caps are removable. After the head is soldered, it cannot be disassembled. The quality of the head is directly related to the long-term safe and reliable operation of the pressure vessel. According to the different geometric shapes, the head can be divided into spherical, oval, disc, spherical crown, cone shell and flat shell, among which the spherical, oval, disc and spherical crown head is also known collectively as convex head. Carbon steel butt welding head is an indispensable important component of pressure vessel equipment in many industries, such as petrochemical, nuclear power, water conservancy, food, machinery, medical equipment, fertilizer, shipbuilding, etc., Carbon steel butt welding head is used in various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers and separation equipment.
Commonly used materials for carbon steel butt weld heads: (20#, A3, Q235, Q235A, Q235B, 20G, Q245R, Q345, Q345R, 16Mn, ASTM A105, etc.);
The commonly used type names and codes of the head are as follows:
1. Hemispherical head: type code: HHA;
2. Oval head: type code: EHA, EHB;
3. Disc head: type code: THA, THB;
4. Spherical crown head: type code: SDH;
5. Flat Bottom Head: Type Code: FHA;
6. Conical head: type code: CHA (30), CHA (45), CHA (60);
Common Executive Rule for Header: GB/T Pressure Vessel Header25198-2010
National header standard pipe standards: GB/T12459-2017, GB/T13401-2017
Petrochemical standards: SH/T3408-2012, SH/T3409-1996
