The process will not tolerate any preservatives, unfortunately.
The aspiration is that the pipe be cleaned at the overseas module yard, shipped clean, dropped into place, and welded up with minimal field time and labor. No field cleaning, flushing, or blowdowns.
But as George says...
Does anyone have experience or recommendations for holding a nitrogen blanket / purge on piping modules and skids for ocean transport when the ends are plain / beveled ends?
The client specs do not permit flanges in these services.
The construction team wants to drop modules on foundations and...
I like the flow chart. I would have lead with it, referred back to it regularly, and finished with it.
Before you got the flow chart, I was afraid you were going to advocate pneumatic tests in all cases, even for pressure vessels and short runs of pipe inside facilities with wastewater...
There are pumps made to handle solids if you're looking for a quick improvement without other changes.
Otherwise, do you have a batch or continuous process?
Does the pump return the water to the bottom of your vessel to agitate any salt that has settled to the bottom?
Can you use static...
A 2' diam x 4' S/S vessel is not a particularly large volume. What are you using to fill and drain now? What is the limiting component? And how much time are we talking about (2 hours total to test 15 vessels? 2 hours per vessel?)?
This is the best filling system I've encountered. It also...
Interesting! I hadn't heard this opinion before and I don't often work in Div 2, so I had not seen the table you mention.
PRG's FE107 appears to use this incorrect approach if I understand your point correctly. I just ran a test case to verify with no weight or pressure loads, only operating...
1. Ask the standard owner.
2. Get actual loads from your piping analyses.
3. If you only have a single set of forces & moments, the most conservative approach I think would be to apply them in the sustained case at 1x intensity and in the expansion case at -2x intensity. E.g. Fa +1000 in...
By the book, maybe impact testing would be required. In practice, many of my clients have not cared about structural attachments and the difference between +15F and -20F.
My clients declare an MDMT of -20F even in tropical areas just out of habit. They never require heat tracing because...
I don't follow... but I see I wasn't clear initially either. I'm concerned about column buckling rather than vacuum buckling.
The L/Do ratio is set by term "L_u" which is the unbraced length of the tower. A stiffening ring certainly helps for vacuum buckling, but I don't see how it changes...
What is a practical method to limit the slenderness of a process column built to Section VIII Division 1?
From what I can tell, there are no explicit restrictions in Sec 8 Div 1 on slenderness, only a limit on compressive stress. Skimming the books from Brownell & Young, Moss, and Megyesy...
What is your recommendation for the "R" Response Modification Factor for a skirt supported, welded steel vertical vessel such as a process column?
ASCE7-05 table 15.4-2 is the applicable reference.
Link: Table 15.4-2 (see page 2)
Under the non-building structures I am torn between
-...
I've used SharePoint for working with MS Office files on ad hoc review cycles. Does it work with non-Microsoft files though, like PDFs?
[Emphasis added.]
So Documetum is a necessary evil, a pain in the rear? Am I reading between the lines correctly?
What solutions can the community recommend for software to manage a vendor document review process?
Current state is receiving drawings and calculations from vendors by PDF in an email. Someone prints those out with a cover sheet with a list of people to route the packet too. The paper gets...
I've gone back and forth with civil and structural engineers on this one without arriving at a good (in my opinion) answer. Some say pretension every anchor bolt up to 100% Fy... even on my little pots and pans that weigh less than 1 ton installed indoors. Other say don't worry about...
