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Go to youtube and search for "W11 mechanical 3-roller symmetrical plate rolling machine". At 0:38 and 1:22 of this video, you can see short straight lengths on each end. This is normally outside of PV design roundness tolerance.

The amount of extra length depends on a number of factors, including the roller machine design. Smaller machines would need less extra length (say +300mm, but smaller machines would only be able to roll short widths). Larger machines would need more extra length (say +600mm). Extra length...

Plate rolling process usually results in a segment of straight length (at the starting end of the plate). Your posts suggest that you've little experience in plate rolling. You should let experienced vendors to roll for you.

In the case of A105N vs A350-LF2, the difference may be material certification only??? However, certification is very important, from compliance and legal perspectives.

Each device has its advantages and disadvantages. Coalescers are polymeric material that comes in long cylindrical cartridges. Filter vessels can have one or many cartridges. Essentially, they combine very fine droplets together creating larger droplets which run or drip down to a sump/drain...

A schoepentoeter spreads the high velocity gas flow (coming from the inlet) evenly across the cross-section of the vessel. Without an inlet device, one portion of the filter device would have to filter much more gas than other portions of the filter device, thereby reducing overall efficiency...

Both are used to filter out liquid droplets present in a gas stream. Suitability depends on your needs, and can also be used in series. Sulzer Chemtech has useful basic info, just google Sulzer Chemtech separation technology.

For 1/2" NPS tapped connection, the code requires you to have at least 13.5mm of effective thread engagement length. That is, it prohibits tapping into pipe walls, flanges or fittings that are too thin.

GTAW is not suited for field welding as you will need to have very good shielding from even slight wind.

Suggest you take a look at the R002 Norsok Lifting Equipment document as guidance/reference.

Buried pipe.

I know of 2-3 cases attributed to lightning. By memory, the steel surface is quite clean (i.e. free from corrosion), damage found after a lightning storm, damage at or near 12 o'clock of pipe, out in open terrain. Damage not as big as Figure 2.4.3 in Dehn's Lightning Protection Guide...

If D is mm, t is mm and S is MPa, then Fr will be in Newtons and Mr in Newton-mm. Parameters a and b are dimensionless.

If I understand correctly, you have a 950mL chamber that starts at 1 atm pressure and ..room?.. temperature. You need to calculate the mass of its contents at this initial stage. At the final stage, the chamber needs to be 20kPa and ...?.. temperature. Calculate the mass of its contents at...

My calc using DN700 x 5mm WT x 20m cantilever gives 119mm deflection by self weight. Cantilever deflection is sensitive to span (21m span gives 145mm). Deflection is dependent on the type of soil on the end of the excavated hole (i.e. cantilever assumption under estimates deflection; worse if...

See ISO 13956. It is a destructive decohesion test. I have seen joints passing hydrostatic but failing decohesion. Whilst following process is very important, there are small differences between manufacturers of electrofusion fittings.

The only thing that I can think of is PE Coating, but it doesn't make sense for a power plant.

It suggests to me that the design plan is for the individual spools to be hydrotested in the shop, then caps will be cut off on site and welded to other spools.

Sometimes I come across guys who don't care because any potential problems will only show up in 20 years time (long after they've retired). Then, I wonder if any of my predecessors have made similar unsound decisions that I'll wake up one day and have to deal with the fall out.

3 should read Switching a pipeline of is something that I haven't come across.