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I am evaluating some options to keep rain runoff from my neighbor's property from getting as much onto my property by my house. His property has a fairly steep slope down to mine, and mine has some slope, but some of that run-off pools along the side of my garage. I'd like to divert that...

Thank you very much! That answered my question.

My question pertains to steel gas transmission pipelines with flanges being hydrotested. If it's 600# class, then the flange rating is 1480psig. However, the pressure test often exceeds 1480psig, sometimes to 150% of the weakest component on the pipeline (like the flanges). My question is...

Generally, I understand vehicle crossings of steel pipelines need to be crossing perpendicular to the pipeline...and that is what the standard calculations and procedures have in their focus for vehicle crossings and stress analysis. Operating companies rules generally say "NO parallel vehicle...

Thanks, LittleInch. It's actually over a concrete drive, so that does help spread the loads out even more. Conceptually, I believe this all makes sense in that there's only a tiny part of the pipe resisting hoop stress, but a lot larger area of the pipe resisting longitudinal stress. So...

Newbie question here. I'm considering a calculation where a vehicle load will be crossing directly over a steel pipeline (5' soil cover). I'm using the Spangler equations for vehicle loads. I'm assuming max operating pressure in the pipeline so have 72% capacity for hoop stress. Following...

When designing a structural steel skid to support piping and valves, what rule of thumb should guide how far off from the center of the skid the fully-assembled-skid C.O.G. should be allowed for safe lifting of the fully assembled skid during construction? In the past, I've typically just made...

Sorry, I should've clarified. I didn't mean "legislation" in terms of like environmental permitting, road/railroad permitting, etc. I just meant in terms of licensure laws or any other state-level laws regarding the industry, like maybe about liquid hazardous pipelines or whatever. Maybe the...

pennpiper, I got a "404 Page Error" when clicking the first link.

I think it is no surprise to any of us in the oil/gas pipeline industry that some people may play "loose" with state or other non-federal legislation and ignore it as having any authority or relevance so long as you're basically following the CFR's and ASME and industry standards. In terms of...

Everyone: I'm needing some career advice. For a while now, I've been considering if it would be a good fit (and career move) for me to move from working as a consultant engineer in liquids/gas transmissions pipelines to working as an engineer for an operator company. I'd greatly appreciate...

What are some good resources on how to make plans for a successful nitrogen purge of a liquids line?

BigInch, I definitely appreciate hearing your input and perspective. Could you elaborate a little more what you mean about designing your pipe connection for lower stress and flexibility? Thank you.

I'm considering a preliminary thrust block design for a large steel liquid-products pipeline (20-24"). I am familiar with the engineering principles behind the design of a thrust block (as well as having experience with soils and structural design), but the only thrust block design guide I've...

BadgerPE, I fixed my problem. The overturning stability ratio came out around 3.5-4, and I was able to get 70% bearing contact. I realized I miscalculated the moment from the wind when I was doing the bearing contact pressure calculation, so it was higher than it should've been. That got my...

BAretired, the point where I'm disagreeing is that you can't factor in the weight of the footing for a bearing pressure calculation - it's already assumed per the definition of "net bearing pressure" per the quotations I provided above from Braja Das. However, I think you can add the difference...

KootK, that's a great way to analyze the situation - thanks. Related to what you said, I figured I'd add the difference between soil and concrete unit weights as an additional vertical load, and that's helping to make my numbers more reasonable for a more reasonably-sized footing.

Per the 6th edition of Braja Das' book "Principles of Foundation Engineering" page 129: "The net ultimate bearing capacity is defined as the ultimate pressure per unit area of the foundation that can be supported by the soil in excess of the pressure caused by the surrounding soil at the...

Regarding what I said above, P/A does includes the weight of the concrete in the value of "P" (the vertical load), not just the applied load, right?

BadgerPE, I think I understand now and have resolved my confusion. With the standard bearing pressure calculation of P/A, when the engineer is using the soil's "allowable bearing capacity," this is the reduced value per a safety factor from the "net bearing capacity" (which is the ultimate...