Quick Open Cover
Quick Open Cover
(OP)
I am developing a project to "Quick Open Cover" and would like to know which standard to follow or even a book. There's something written in ASME? Will be mounted on a simplex filter with 3.5 MPa of pressure and temperature of 200 ° C, Filter Material: ASTM A 351 CF8 (Cast).
Please help me.
Please help me.





RE: Quick Open Cover
Then, I would search the internet for various manufacturers products, to get some knowledge of the various styles available.
You could maybe just buy one.
Regards,
Mike
RE: Quick Open Cover
In general, most of the ones I've seen have been designed to ASME Section VIII Div 1.
RE: Quick Open Cover
RE: Quick Open Cover
jt
RE: Quick Open Cover
If I were developing a product line I would definitely buy a few types...
Regards,
Mike
RE: Quick Open Cover
Thank you very much
RE: Quick Open Cover
RE: Quick Open Cover
jt
RE: Quick Open Cover
The Code has sufficient rules to design the primary pressure retaining portions of the closure, I probably would not have any qualms about taking that part on. The basic mechanisms I also imagine to be relatively simple.
BUT I imagine the real guts of a true quick opening closure to be the safety and interlock systems. This is where, to my mind, the real "art" is involved. I expect these systems to be proprietary to a large extent, I doubt you will find design rules for them.
Interesting project, good luck.
Mike
RE: Quick Open Cover
RE: Quick Open Cover
http:
4.8.1 Scope...........................................4-166
4.8.2 Definitions ..................................4-166
4.8.3 General Design Requirements .......................................4-166
4.8.4 Specific Design Requirements........................................4-167
4.8.5 Alternative Designs for Manually Operated Closures ................4-167
4.8.6 Supplementary Requirements for Quick-Actuating
(Quick-Opening) Closures ....................................... .4-167
RE: Quick Open Cover
That is the new ASME VIII Div 2 table of contents.
RE: Quick Open Cover
Thanks for the information.
Part of the answer to the OP's question should be there.
RE: Quick Open Cover
4.8.4.4 It is recognized that it is impractical to write requirements to cover the multiplicity of devices used
for quick access, or to prevent negligent operation or the circumventing of safety devices. Any device or
devices that will provide the safeguards broadly described in paragraphs 4.8.4.1.a, 4.8.4.1.b and 4.8.4.1.c
above will meet the intent of this Division.
RE: Quick Open Cover
4.B.3 Design
4.B.3.1 Code rules cannot be written to address each specific design; therefore, engineering judgment
exercised by a qualified designer with the necessary experience is required to achieve a safe design.
Because of the multiple requirements imposed on the design, it should be prepared by a designer with suitable
experience and training in the design of quick-actuating closures.
RE: Quick Open Cover
Thank you for answers.
Unclesyd,
The range of work is the same, this is a filter 2", 3.5 MPa, 200 ° C, as B16.5, Material: 351 CF8, the thickness of the filter was calculated to meet these conditions.
As you said, I'm really looking for something simpler, ASME SECTION VIII DIV. 2 It is very vague. But give a look. Did not anyone have any picture, or some link, for me to see it to follow the?
Thanks.
RE: Quick Open Cover
Some possibility is to use a metal seated union design with blind side or a 2 bolt clamp flange or an acme or buttress thread threaded cap.
RE: Quick Open Cover
Here are two approaches mentioned in my previous post. Your environmental conditions take you out of the O-ring sealing range, which limits you to a metal to metal or a metal gasket configuration.
Your conditions also put you out of range of sanitary type clamping connections.
I think the Gandl Fittings would be your best approach by using a welding union with plug instead of the tail piece.
You could make the nut of different material to help alleviate galling.
The second site has screwed type quick opening head
htt
http:/
RE: Quick Open Cover
http://www.in-line.ca/closures.html
http://www.durolok.com/index.html
An ASME paper on end closures.
http
RE: Quick Open Cover
What I need is a fast opening cap in simplex filters, like this:
http://www.fdpp.com/SimplexIndex.htm
http
Some items that you sent me are very interesting, but it is what I need.
RE: Quick Open Cover
The one thing that prevents you from using a yoke type closure is they require the use of an O-ring to seal and your specified temperature takes you out the O-ring territory. With your small diameter a yoke would be no problem pressure wise if there is some type self-energized metal gasket that one could used.
The reason I suggested the metal seated pipe union is that it readily available and allowable code wise. To me it allows you use a nut of different material and any type lubricant to alleviate potential galling problems with a screwed connection on SS.
It would be possible to use the seat design of the union thread piece, either the metal to metal or the O-ring seal design with a pressure energized metal O-ring and closure using the union blank cap. The closure force could then be applied by a yoke and screw instead of the union nut. There are several possibilities to mount the yoke, trunnions , split clamp, welded lugs on the filter body, screwed collar using the threads on the union thread piece.
Even the yoke clamp here depends on O-rings to seal so the temperature is limited by the O-ring compatibility with the process fluid. Pressure is to Class 1500.
http:/
RE: Quick Open Cover
http://www.helicoflex.com/ViewProduct?product=514
Regards,
Mike
RE: Quick Open Cover
You might want to look at the Selco Gasket it is blowout proof and fire safe.
http://www.selcoseal.com/
RE: Quick Open Cover
Regards,
Mike
RE: Quick Open Cover
A 200 deg C design temp is not an issue, Viton A seals are rated for continous operation at 204 deg C and you have other options such as Aflas.
RE: Quick Open Cover
The cyl and plate can possible be calculated but the bolting/closure may not and proof will be needed.
1- you do not need ASME stamp for it.
2 if ASME VIII-1 stamp needed: you should have it Proof tested, all materials have to comply w/the Code.
other: have the design cert by a proffessional eng experienced i the design and stamp it with ASME div2.