Formed Heads | Dished Heads | Types of Head | Head Types: ASME Section VIII Div. 1 @ Whizz Engineers
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- Опубліковано 8 лют 2025
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Pressure Vessel's formed heads/dished heads
Types of the head as per ASME Section VIII Div 1, UG-32
i) Ellipsoidal ii) Torispherical iii) Hemispherical iv) Conical
v) Toriconical
Terminology of dished heads: Crown radius, Knuckle radius & ID
Dished head forming: Single blank & segments (crown & petals)
@ Whizz Engineers
Great video
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Well explained...
Very nicely explained
Thanks a lot!!
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Whats the code to be used for an unstayed flat head with large central hole less than 1/2 outer diameter?
how to mark nozzles dish top and other degrees
Please send layout formula hemispherical
Hi, where we tolerance for Circumference of Dish and Shell as per ASME VIII?
Circumference tolerance is not given in ASME Section VIII, please refer client specifications for circumference tolerance.
Please watch the Dish Head inspection video:
ua-cam.com/video/KSKEPA_ffhY/v-deo.html
4:38 Why cannot the type of heads be manufactured from a singe flat head or peace? Will it be weaker?
I imagine at larger diameters (like the example shown) the amount of deformation needed to stamp/draw a hemispherical head from a single plate would either exceed the elongation-to-break of most materials, and even if it didn't just think of how large a press would have to be to both be powerful enough and have a deep enough stroke in order to perform the stamping. It likely just becomes cheaper and easier to do it in sections.
The limit of sheet metals width is the standard capacity width of the rolling mill. Anything requiring a wider sheet than standard is custom made or welded from the smaller sheet width.
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