Correct r6155, we have that marked on our review as that minimum distance needs to be 0.25 of wall thickness per UG-43 while meeting thread engagement requirements of stud (there is no corrosion allowance on this product).
Thanks
"Success is not final, failure is not fatal: It is the courage...
Yes, the mating flange (blind) accepts an o-ring.
"Success is not final, failure is not fatal: It is the courage to continue that counts."
Winston S. Churchill
Hello all,
Can a reverse loose ring flange, that has metal to metal contact outside of bolt circle be designed per Appendix Y? We have a customer that has provided a design and calculations from App. Y and has asked us to review for compliance. I take App. Y to be for metal to metal regular...
Thanks for the comments. We know flanges can take a higher test value than 1.5. How much higher is not something our customers typically want to engage/commit to. Most customers we deal with either want to see a code provision, or the engineering to back up deviations from code stated...
Thanks for the reply, however the majority of our customers require a 4 hour minimal, which is norm in the North East oil/gas producers. Our fabrications are large slug catchers,(and exposed to the weather). It is not uncommon to see a 40 psig pressure swing during the course of the test due to...
Hello All,
We have a B31.8 600# class fabrication (operating at over 30% hoop stress) that we will be hydro pressure testing with a customer supplied test range of 2160 psig-2225 psig. The customer wants a MAWP rating of 1480 psig. I have stated that the MAWP can only be rated at the highest...
Subject: Is stress relieving (PWHT)on a B16.47 6.75" thick A-105 blind flange required when attaching a nozzle that has an effective throat less than 1.25"? This is a non lethal service- UW-2 does not apply. Construction code is B31.8 Reference section 825.2
Hello all. I am looking for some...
Hello All,
I vaguely recall reading a document awhile back that stated in piping design one could use actual MTR yield results uo to 20% above the given specification for the material in question. I have since tried to locate this in the BVPC/B31.8/B31.3 to no avail. Assuming applicable...
JTE,
I am coming to same conclusion that although not ideal, I cant find anything that would prohibit in either BPVC or B31.8(less stringent. We will probably back up the AR calcs with some FEA.
Thanks for your input!
Code: B31.8
Hello all,
Although not typical, is there any provisions restricting the placement of a repad on top of an existing repad to come up with the required area per 831.4 and appendix F, and as long as the additional area needed is within the reinforcement zone, and applicable...
Thanks JTE,
We are paid subscribers to the BPVC manual and Codeware. I am working with both simultaneously on this. UG-39(c)(2)(b) is what I am using for the 3" nozzle, but when inputting the 3" and 2" through Codeware, it is exempting the 2" nozzle for extra reinforcement per UG-36(c)(3)(a)...
Hello all. Please be easy on me since this is my first post on here :-)
Subject particulars: Construction code: B31.8, Flange specification: B16.47
Subject matter: 42" blind flange,600#, that requires 2 openings. Opening A, d=3" and is located near the top of blind at 12.00 o'clock position...
