304 stainless steel head

304 stainless steel head is an end cap on pressure vessels, which is a major pressure bearing component and plays a sealing role. The head is used to seal the top and bottom of the pressure vessel body, and the pipe is at the end and no longer intended to extend forward. Therefore, a head is used to seal the pipe by welding. Products that have similar functions as head seals include blind plates and pipe caps. Blind plates and threaded pipe caps can be disassembled. After the head is welded, it cannot be disassembled again. The quality of the head is directly related to the long-term performance and good operation of the pressure vessel. According to different geometric shapes, heads can be divided into several types such as spherical, elliptical, disc-shaped, spherical crown shaped, conical shell, and flat cap. Among them, spherical, elliptical, disc-shaped, and spherical crown shaped heads are also collectively referred to as convex heads. 304 stainless steel heads are divided into butt welding heads and socket welding heads in welding

304 stainless steel head and commonly used stainless steel materials: (304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347, 0Cr18Ni9, 00Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc.)

The commonly used names and type codes for heads are as follows:

1. Hemispherical heads: Type code: HHA;

2. Elliptical head: Type code: EHA, EHB

3. Dish shaped head: Type code: THA, THB

4. Spherical head: Type code: SDH

5. Flat bottomed head: Type code: FHA

6. Conical head: Type codes: CHA (30), CHA (45), CHA (60)

Common execution standards for heads: GB/T25198-2010 Pressure vessel heads

Head national standards, pipe fittings and pipeline standards: GB/T12459-2017, GB/T13401-2017

Head petrochemical standards: SH/T3408-2012, SH/T3409-1996

304 stainless steel heads are excellent and important components of pressure vessel equipment in many industries such as petrochemicals, nuclear energy, water conservancy, food, machinery, diagnostic and treatment equipment, fertilizers, shipbuilding, etc.

. Applied to various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation equipment