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Segmentable bends are bends with additional ovality controls so that they can be field trimmed to the necessary angle. I'm used to seeing B16.49 bends with supplementary requirement SR15.3 specified (maximum 1% ovality through the bend). These are more costly, due to added complexity during...

Depends on your industry and specialty. In Oil & Gas, API certifications can be useful (e.g., API 570). There are also nondestructive testing (NDT) certifications through ASNT or credentials like Certified Welding Inspector (CWI) from AWS. Getting your PE license is always a good idea...

I've seen supplementary CVNs specified on A350 LF2 and A333 Gr 6 down to -80°F, but getting plate material of similar metallurgy that will pass is likely to be a tall order.

Refer to API 650 para. 4.2.9.6, and ASTM A370 Table 10.

The code does differentiate between who completes the weld. It assumes pipe is supplied with associated NDE completed. No additional NDE is required if the designer utilizes the joint quality factor associated with the pipe. Additional NDE may be completed to provide a higher joint quality...

Puget Sound Pipe.

This is a strange no-man's-land of the codes, but flanges per A694 and A707 in this size and pressure class are common and have a long service history in my region, and are specified by multiple major operators' pipe specs. In short, the dimensions of the flanges meet B16.5 and the pressure...

L7's are alloy. A320 covers some stainless grades as well. https://www.portlandbolt.com/technical/specifications/astm-a320/ You could be getting galvanic corrosion if this flange/bolting is exposed to the elements. Isolation kits would disrupt the galvanic circuit, or you could try a more...

You've got this backwards. A high stress ratio gives a lower Tr. Look at Figure 3.7. Case 2 has a higher stress and lower Tr, so it has a higher MAT than Case 1. I don't fully understand your question, but below the Rts threshold from Figure 3.7, we are confident in the behavior of the steel...

1. Yes, Charpy impact tests are common for line pipe. 2. Any of the methods in Annex G or 841.1.2(c) are acceptable. The values given in G.7 are commonly used because they already did the math for you (assuming you meet the limitations in G.7.1). 3. No. You will typically design at the highest...

I assume you would double weld your SO flanges? If not, there are a number of potential issues (see 308.2.1). In general, SO flanges are more susceptible than WN flanges to fatigue failure due to the fillet weld configuration, as well as installation errors like failing to weld the inside...

I think that leads you to assume those pits are interacting and to assess them as a single pit or area of localized pitting (per part 5 and Figure 6.15). Can you share some additional details about the vessel? Wall thickness, MAWP, pit depth, etc.?

The most common way I seen is using metal seated valves and avoiding vulnerable soft goods entirely. Or using flanged valves. Your control valve example didn't upload, but that check valve is available with metal-to-metal seat option.

HDPE is measured in "Iron Pipe Size" specifically so it is can be mated to comparable iron piping components like you are trying to do, so 5" ductile iron pipe components should be able to work with 5" IPS HDPE. But as mk2332 said, 5 inch is an odd size. You can go up in size to 6" as...

Second result: https://www.google.com/search?q=NACE+buried+pipeline+corrosion+guidelines

Calculate the the design pressure that the nominal 15mm blank is good for, then use the ratio of that design pressure to your actual design pressure as the stress ratio. Refer to 323.2.2(b)(2).

For smaller lines and shorter cold spring lengths, a choker and come-along or two might get the job done. Otherwise I think the D9 sideboom method is standard.

We commonly cold spring North Slope pipelines. Install temps of -20F are common, so most operators specify cold spring to account for the steel contraction from 60F. Codes don't permit any credit to be taken in the design of the expansion loops, but it is a best practice.

Y grade is raw NGL plant liquids. https://www.linkedin.com/pulse/what-y-grade-ngl-jack-babcock/

This statement does refer to CVN testing on full size coupons, i.e., 10mm x 10mm, as opposed to subsize coupons, which are permitted when the pipe isn't large enough to produce full size ones. The absorbed energy from subsize specimens can be converted to an equivalent full size energy value for...