Search results for query: *

We have a earth grade slab pour scheduled for tomorrow. The high and low temperatures for today are 40F and 24F. Tomorrow is 42 and 17, then 22 - 12, 24 - 12. The zip is 73013. This is a foundation for an architectural structure and the concrete will be exposed to foot traffic. Should we...

1500 scf is about 2.7 moles X 64 lb of SO2/lb.mole = 170 lb SO2 per day, ~31 tpy of SO2. We are permitted at 93.5 tpy of SO2. Yes, we are treating produced natural gas in the lower 48. Thanks for getting me to re-check my emissions. Do you know what minimum Btu value I should maintain in...

Where do I look to find the minimum Btu value for sustained combustion. My amine still overhead is about 450 mscfd CO2 and 1 mscfd of H2S. I am incinerating the H2S in a flare and currently using about 100 mscfd of 1000 btu/scf gas to maintain combustion. Is ~200 btu/scf a reasonable target...

I have often been told that, in a wet gas system, taking a two step pressure drop (two regulators in series) will reduce hydrate formation tendencies over a single regulator. An example would be a 100 compressor fuel gas system with supply gas at 1000 psig. Installing two regulators; 1000 to...

What is meant by API 5L X-42 Triple Stenciled Pipe? Is it X-42/46/52? Is single stenciled pipe available and would it have a lower maximum yield value? Is PSL1 vs PSL2 relevant to triple stenciled vs single stenciled?

I've encountered a wide range of comfort level for 1000 psig, 4 psi H2S partial pressure pipe; from seamless to X-42/52 PSL1. The one person I've spoken with that experienced an SCC failure indicated that the failure occurred on a pre-1972 vintage LFW ERW line and that the SCC was confined to...

I failed to state that the gas stream is dehydrated with about 3 mol% CO2 and 4000 ppm H2S at ~80 deg F. Eventually the pressure may drop from 1000 psig to 350 psig without dehydration.

What material specification should be used for gas piplines with high partial pressure H2S (P(H2S) = 4 psig)? I am under the impression that MR0175 does not address HIC, SWC, and others and that I should spec conformance with ISO 15156-2. The pipe vendors respond that MR0175 is equivalent to...

So should I be constructing to ISO 15156 rather that MR0175? What is the difference between 15156 and 15156-2? I purchased 15156-2, assuming it was the latest, but I was a little unclear on how to specify to it, other than a blanket statement that the material shall conform. It looked like I...

I was mistaken in thinking the graph (chart) was part of MR-0175. Looks like it was attached to my hard copy of the Standard and not part of the standard. The chart plots H2S (ppm) against System Pressure (psia) and has lines for 0.05 psia H2S partial pressure and 5.0 psia H2S partial...

We are constructing a pipeline which will operate at around 1000 psig. The gas will contain 1000 ppm to 4000 ppm H2S in natural gas. I have a chart that indicates the line should be constructed to NACE Plus. What is NACE Plus? I have done plant construction to NACE. However, I have not done...

The system was designed with TEG rather than steam and we don't have a steam system in the plant. I'd rather have steam, but I don't think I have economics for the changeout.

We have a leak in our sulfur pit heating coils. TEG is the heat medium and the leak is in coils, below the liquid/vapor interface. There was a fire in one of the condesers that caused the TEG to get very hot. Within a week the leaks developed in two of the four heat medium coils. I plan to...

I am operating high pressure natural gas pipelines with 3% CO2. The gas is typically dehydrated and the lines are piggable. We have issues with loosing our dehydration for periods of several days at a time. The gas is water saturated upstream of the dehydrator and cools 20 or 30 degrees F as...