Many thanks! I had looked at that catalogue before, but somehow missed that page.
Strange that they allow temperatures higher than ASME Sec VIII, but I guess gaskets have different rules.
Is there a standard that defines the temperature limitations for ring joint gaskets? ASME B16.20 does not list temperature ratings and there was nothing in the manufacturer's literature.
We have ASME B16.5 flanges, which define the T&P limitations for the joint, but we are evaluating other...
All vessels are blinded off and the final connection doesn't have to be tested per code. I would prefer a low pressure test after everything is bolted up, but they will only do code requirements (contract issues). I will do a full test later when we do other testing.
I don't have ASME PCC-2...
That is indeed what we will do (except pneumatically). There are no vessels in line and by my estimation there is only about 15 ft³ of piping at 110 psig, so the amount of stored energy is relatively low (but I have read several posts in regards to pneumatic testing and the dangers).
I must...
Thank you both for your replies.
jte - The spool has not been hydrotested for code compliance. We need to break into the system to get our apparatus in to do the code test (it is actually pneumatic). So we will have two flanged joints that are not tested. In fact, there are additional joints...
We have a piping system being built in accordance with B31.3. Due to the layout, we must remove a flanged spool to get our test apparatus in. After we test the piping and replace the spool do we need to retest the two flanged joints? We have similar cases with union joints.
My thinking is...
Table F6 of B16.5 gives the smallest size requiring a hub as 1" NPS (1.315" OD) so a 1" OD tube would be smaller than this and even though it is not threaded I would think it is covered. Thank you very much eliebl.
JohnBreen - Thanks. I would have used a reducer, but it was going form tubing...
Thanks for the replies, but my conundrum is not necessarily what will work technically, it is what will "meet code."
If I modify a standard 16.5 flange can I still use its temperature-pressure ratings as a listed component or does it then become an unlisted component that I have to verify using...
Thanks for your thoughts. Provided that the test temperature is below the design temperature and you don't overstress the pipe the test pressure is at least:
150% of the design pressure for hydrostatic leak test
110% of the design pressure for pneumatic leak test
25% of the design pressure for...
Sorry to dredge up an old thread, but I think the question still remains:
For a piping system that has been classified as Category M fluid service, is both a hydro test (or pneumatic test) AND a sensitive leak test required?
I read all the threads listed and didn't see this addressed. ASME...
The stub ends are not fabricated in accordance with B16.9 or B31.3. They are unique to the manufacturer and are part of a manufactured piping system (see link):
http://www.resistoflex.com/rotateflange.asp
I would have to use a 2" to 1" reducing flange and then get a fitting for connecting 1" pipe to 1" tube. I suspect the parts are out there, but that ends up with at least one extra weld and an extra fitting. That is an option.
I would still have an issue with my lap joint flanges, however...
Can modified B16.5 flanges be used as Listed Components within a B31.3 piping system?
In particular I have a 2" blind flange that I want to bore through and slide a 1" tube through and fillet weld on both sides. Also I have several 1", 1½", and 2" lap joint flanges that need to be bored out to...
In-line filters make sense. I can understand in-line components like filters, fittings, and valves, but I don't know how I could apply it to rotary valves, roll compactors or other things like that.
Fantastic. Thanks for the help. It didn't sound right, but I didn't think of the exclusion immediately and I am new to B31.3.
I am also going to assume that "other fluid handling or processing equipment" would apply to things like rotary valves, filters, and anything else under the sun that...
In designing an ASME B31.3 piping system, are pumps considered an unlisted component (since they do not have a standard listed in Table 326.1)? As such would they have to have design calculations consistent with the design criteria of the code (i.e. section 304)?
I have a client who wants me...
