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Yes an acme connector with an elastomer seal meets the requirements. Unless 6A specifically says you can't do something it's fair game. On the other hand, local regulations or best practices might impose other requirements. In the next edition of 6A they will include a top connector just as you...

Just to try and clear one thing up, there appears to be a misunderstanding on whether there's an industrial exemption in Ontario, there isn't leastwise not the same as in the US. Every province in Canada has a similar clause to the one referred to. I've heard it referred to as the millwright...

Contrary to popular belief Canada does quite well in the field of electronics engineering. Listed among the world leaders in some high tech areas such as aeronautics, flight simulators, fuel cell technology, telecommunications, satelite electronics, etc. etc. Where we fall down is in the mass...

Nortel

I had the gas nitride experience with 410 some years back, the stuff was pitting on the shelf within a week so I've already checked with the heat treater and looked at some stock, definately liquid nitride. Did PMI, definately 17-4. The part is a bare stem hanging out over the edge of a...

We have some equipment which has corroded faster than expected and I wonder if anyone might be able to provide some insight? Matl: 17-4PH H1150 HRC 28 with a liquid nitride treatment Exposed to atmosphere on offshore platform in warm climate. Severely pitted/corroded within 4 months. We have...

How about using a ceramic/polymer composite coating?

I know some users such as Shell, BP, Gazprom, & Exxon have data because I've had to submit equipment for testing. Whether it's published for public consumption is another matter.

I took a course in macroeconomics in school, all I remember from it is I was bored silly. So my view point is simplistic, ignorant, and probably flat out wrong but here goes anyways. Strikes me that some of the most spectacular economic failures have been at least partially due to isolationism...

We test some of our gate valves to cut braided wire. I've never been able to find a standard test, we basically stick a piece of wire through the bore of known size and strength and shut the valve then evaluate the results. You could do the same thing with wire or rod of varying size and...

greybert, You want to get your specimens from within the 1/4 T envelope. I.E. the specimen should lie within 1/4 of the thickness from the midpoint or centre axis of the thickest cross section. Since it's a casting, orientation won't matter.

A couple more for Metalguy's list Cost Availability Manufacturability (if that's a word) Servicability

You might try API RP 5L8, Field Inspection of New Line Pipe.

I know Sealweld has a lubricant they rate for 2000 F. We use a Desco product rated at 750 F for steam valves. Another manufacturer you might try is CS Clare (sp?).

EngineerDave has it right but I think a more appropriate term would be entropy - degradation to an inert state of uniformity.

Here's the skinny from the valve manufacturer's perspective: The warranty is void if our recommendations for welding aren't followed. This involves a high postheat requiring the valve be disassembled before welding. The warranty is void if anyone but one of our service technicians dissasembles...

My advice is if you want a life other than work avoid a field where your customer runs 24/7, i.e. service or oilfield equipmet manufacture or, worst of all, oilfield service.

Your test equipment isn't covered by API. If the volume is small enough it isn't covered by ASME either so all you're subjected to is best practise. Do some calcs to see if the configuration can be rated to 7500 with a reasonable safety factor. Of course your biggest problem might be preventing...

Quick question, is the 2" NPT/LP part of the equipment being tested or part of the test equipment? If the working pressure of the 2 NPT is under 5000 you can test to 10000 but if it's part of your testing equipment your working pressure is 7500 and you're above the recommended working pressure.

What you see as cracks is probably ferrite. You may have better luck for this service overlaying a low alloy such as 4130.