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When considering code requirements, every code paragraph should be considered mandatory unless an exemption exists that will permit construction without meeting the requirements.

If you need material for impact testing, install a 4" nozzle. The cutout should be sufficient for testing samples. eliebl

If no data is available to determine the type of steel then I would be hesitant to do any calculations. I would probably run away, very far away.

At first glance it appears that this was a case of overpressure. The fire tube is external pressure design. It there was a slight out of round then all bets are off. External pressure relies heavily on stability and not so much on strength. I once chased down how the code rules were...

Is there a particular question that you are trying to answer? The fitting registrations expire after 10 years. There is no expiry on vessel design registrations (unless the a code change makes the design non-compliant) and piping registrations are usually for single systems, tied to the...

Don't forget UHA-51(e)(2).

APEGGA's survey is conducted yearly and available at www.apegga.ca. The companies I have worked for typically give some sort of change in salary when a P.Eng. is attained.

If it is to be installed in Alberta please go to www.absa.ca. You should get a quick overview there.

I guess this depends upon the material used. If the material specification shows an upper limit then it would appear that this is permitted. If the specification does not impose an upper limit they you would need to take tensile specimens.

All Good Points. My philosophy about woork goes like this: I come to work to do a job that I was hired for. I am not employed here to like you but it helps. Let's focus on the job, get the work done. I have been very fortunate that I have yet to meet some one that I cannot work with. ejl

You may have a clause in ASME VIII div 1 which states that it may be exempted from the requirements of the code book but have you considered the requirements of CSA B51 of the Alberta Safety Codes Act? Pretty much every jurisdiction would have a law which states that you need to use some code...

Nozzle min wall comes from two calculations. First and formost is the thickness required for pressure. Then a check needs to be done to be sure that it meets the requirements of UG-45. If the end of the nozzle is threaded, the thickness available for either calculation is the minor diameter...

With the Victaulic connections be sure that they are acceptable per Appendix 24. It should be noted that this is a mandatory appendix. As for UG-45 minimum thickness, this would apply to the entire nozzle length. Essentially where it changes from vessels scope as a nozzle to piping scope. If...

If my recollection of my geology courses is correct, the amount of CO2 from the Icelandic volcanoes would not be significant. These volcanoes are located at divergent plate boundaries where simple magma is rising to the surface due to parting of the mid atlantic ridge. When volcanoes like Mt...

I wouldn't try impact testing SA-106 B. It's very unlikely that it would pass. SA-333 gr6 is acceptable under UCS-66(g). EJL

I would suspect that welding in a test plate other than initial test would be out of the question. If these are P91 materials I would not want to think about it. My preference would be to have the BSV.

Just because the EPA declared something a hazard does not necessarily make it so. I laughed at that one too.

It would be interesting to see if there is anyone who has built a supercritical HRSG.

The point that was missed that I am aware of is the reference to MAWP shall not be less than the requirements of B31.1 paragraph 122.1.3. If memory serves this was a case of an EPC company designing a boiler and subcontracting all of the parts to different fabricators. If each component was...

Also take a look at Part PFH in Section I. This permits a Section VIII-1 feedwater heater as part of the boiler proper. This may be the case here but you need to confirm that it meets the requirements of Part PFH. I know a few years back there was a HX made but the pressure conditions of Part...