Products Introduction
1. Pressure vessel heads is a kind of metal cover for reactors and heat exchanger which closes the end of the container to isolate the internal and external media, also known as the dish end.
2. Basic information
Material: SS 304、321、304L、316、316L, titanium Gr2 Gr12, nickel and nickel alloys, etc
Type: Spherical, elliptical, dished, spherical crown, conical shell, flat cover, etc
Size: DN300~DN6000
Standards: GB/T25198-2010
3. Pressure vessel heads are widely used for various container equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation equipment.
Detail Shows
4. The processing methods of the pressure vessel heads are generally divided into integral forming and split forms. According to the processing methods, integral forming mainly includes stamping forming and spinning forming, as well as rarely used explosion forming, gas (liquid) pressure expansion forming, and so on. Split forming generally refers to split pressing and tailoring welding. At present, integral molding is often used in domestic.
According to the processing temperature, the overall forming of the head can be divided into cold processing and hot processing. According to the combination of processing mode and temperature, it can be divided into hot spinning forming, hot stamping forming, cold spinning forming, cold stamping forming, and drum forming.
Generally speaking, the dished heads of standard series are generally formed by stamping, and the heads of non-standard series or heads with large diameters tend to be formed by spinning. Compared with stamping, spinning has the advantages of saving die cost and adjusting size according to requirements.
5. Description of various common vessel heads
Hemispherical head: HHA; Type parameter relationship: Di = 2ri DN = di
Elliptical dished head:
(1) Elliptical head based on inner diameter: EHA; Type parameter relationship: di / 2 (H-H) = 2 DN = Di
(2) Elliptical head based on outer diameter: EHB; Type parameter relationship: do / 2 (ho-h) = 2 DN=Do
Dished head:
(1) Dished head based on inner diameter: THA; Type parameter relationship: RI=1.0Di RI=0.10Di DN=Di
(2) Dished head based on outer diameter: THB; Type parameter relationship: RO=1.0Do Ro=0.10Do DN =Do
Spherical crown head: SDH; Type parameter relationship: RI=1.0di DN=Do
Flat bottom head: FHA; Type parameter relationship: RI ≥ 3 δ n H=ri+h DN=Di
Conical head:
(1) Conehead with an opening angle of 30: CHA (30); Type parameter relationship: RI ≥ 0.10di and RI ≥ 3 δ N a = 30o DN expressed in di/DIS
(2) Conical head with an opening angle of 45: CHA (45); Type parameter relationship: RI ≥ 0.10di and RI ≥ 3 δ N a = 45o DN expressed in di/DIS
(3) Conehead with an opening angle of 60: CHA (60); Type parameter relationship: RI ≥ 0.10di and RI ≥ 3 δ N RS ≥ 0.05dis and RS ≥ 3 δ N a = 60° DN expressed in di/DIS
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