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I would say that if there is any code or standard for the design of such systems, that code/standard will dictate the applicable welding code. Otherwise (for EU: assuming PED 2014/68/EU) isn't applicable, which I think it isn't on such systems), it's a matter of contractual agreements. For USA...

I don't think its an issue if it is Code compliant or not, the question would be if its a good idea. 6" NPT is a terrible idea (our construction crew always tried to prevent silly process engrs spec any NPT size over 1"), but lets say you were to do it. B16.11 doesn't list 6" NPT sized fittings...

Thanks for the reminder. Yes, we made some progress, by finding out that the tube and the body were not machined from 1 part. Instead, the body was machines from plate, and the tubes where pushed in. The main body/part was OES examined, so its likely the tubes are a different material. What the...

I would disagree. Sure they’re used for high pressure applications, but they have more possible issues and require more careful flange handling and assembly. By default, try a kampro and get rid of those RTJ’s if you can.

Apart from the usual suspects - spiral wound and kampro - I’d be tempted to say that it (also) depends on your flange calculations. I assume this is a non standard flange? Pa; you haven’t mentioned service conditions for the medium. And a whole lot of other factors that may also affect the...

Thats my understanding as well, at least from an ISO 2553 perspective.

Could? Yes. But it entirely depends on the owner's classification/designation of a piping system. As you may know, there's no list of substances or fluids that are 'typically' Cat M. Read...

Thanks, we’ll take that into consideration

The weld is difficult to access by hand, and we don't have skilled hand TIG-ers, only orbital (ISO 4063-142)

We’ve done the S testing per OES, so we know exactly what the chemical composition is, and hence what the difference is. The tube is low on S and has a regular spec. We’re welding it to a flow cell machines from A240 plate. We’re also familiar with applying an offset, but in our case that...

We have an issue with one of our orbital welding items, for which Im looking for out of the box ideas.. The issue deals with the Marangoni effect; the tube we weld is A269-TP316, and the other item - also SS316 - was found to have a too high (i.e. out of spec) sulphur content. The weld pool was...

Not sure if this answers your questions (or if I understand you correctly), but AutoPIPE takes the input for seismic that you provide it with, regardless who supplied you with that input. For ASCE 7, you can enter the ZIP/Postal code (provided the location your pipe stress model will be situated...

Appendix O has some default torque values, but not for your situation (RTJ). Whats the size and flange material? What K-factor do you expect? A bit off-topic here, hopefully someone more knowledgeable on BFJ's and PCC-1 isreading along; how does one determine the appropriate Appendix O factor...

Normally, c is a given value. Based on formatting, if yellow is input, c is a given value in advance. Refer to 304.1.1 how c is determined. If the pipe requires 12/5% tolerance on wt, you already have a c of 0.0469 in. I would ask the engineer who made this calc, how he ended up with 0.059 in...

Torque is dependent on a lot of things, which yo haven't specified — for example, not only flange size, but also flange material, gasket material, anti-seize, etc. One crucial aspect is knowing/understanding the nut factor. In the end, the gasket stress is what matters, and that's achieved by...

Does this project require conformity to EN 1090, or do the products fall under the scope of CPR 305/2011? Then, im afraid CE-mark is an absolute legal requirement. We’ve had our Canadian sister company (who are familiar with the North American market) do a CE-marked project for the EU market...

Correct, but this a weldolet. Weldolets are also used on elbows, in the configuration shown above. Does the Code allow this practice? No, I think not. The elbow is likely considered an unlisted fitting now. Is this method used more often for Code applications, without further/additional...

I dont think it directly answers the OP's question, but there's been more discussion recently here at ET on B31E vs B31x; https://www.eng-tips.com/viewthread.cfm?qid=521690. I think if you understand the differences in both Codes, you might find an answer more easily. Huub - You never get what...

Thanks guys for the valuable feedback. Huub - You never get what you expect, you only get what you inspect.

I have the following, similar issue. Im curious to hear others opinion. Construction code: B31.3 2022 Piping MoC: DSS 2205 Fluid service involves chlorides Client has no specs or specific requirements for this piping scope Piping requires bends with a larger radius than default B16.9 LR...