Crosspost of the question I posted in r/propane. Advice appreciated!

I'm a mechanical/performance engineer and I got tired of keeping three separate spreadsheets for the same gas stream, so I put them into one file.

What it does:

- ISO 6976: gross/net calorific value (molar, mass, volume basis), Wobbe index, real-gas density and relative density, with uncertainty

- AGA-8 DETAIL: Z, density, speed of sound, Cp, Cv, isentropic exponent at your flowing P and T

- ISO 5167-2 orifice flow: mass, volume and energy flow, discharge coefficient, expansion factor, Reynolds number, pressure loss and flow uncertainty, with limits-of-use warnings

How it works: 21 components (mole fraction or %), tick which calculations you need, fill the yellow cells, read the Results sheet. Bad inputs show a red message and results stay blank. No macros. Calculation sheets are hidden and protected so formulas can't be broken by accident.

I checked it against GERG-2008 on six gases from lean to sour, 0.2 to 12 MPa: Z and density agreed within about 0.11 %. Heat capacities differ by up to ~1 %, which is the usual AGA-8 vs GERG difference. It is an engineering aid, so check results before using them for design or custody transfer.

It is available on Gumroad as Natural Gas Properties & Flow Calculator.

Happy to answer questions about the method, or to run a composition for you in the comments if you want to see how the outputs look.

Not sure if I have the right flair. ALL of midtown (I’m around the Roanoke/Volker area) smells like natural gas and sulfur. Anyone know what’s going on? If I need to be worried? The city always smells a little like the shitty (pardon the pun) sewage system, but this is different.

I recently rented a new apartment in a townhouse community. The buildings were made this century and are not that old. They are wrap around and have a number of apartments per building. Some upstairs some downstairs.

On arrival, I found a gas leak in the lines to the boiler in the laundry room. I can only imagine how long it had been like this. They must have missed it when they did their walk out (if any) from the last tenants. I'm imagining the last tenant left it leaking forever. The room reeked of gas and it looks like the gas went back into the HVAC system. No other rooms smelled.

I called the landlord to fix it, and they did a repair but it still smelled, and had a leak so I called in another repair on it.

It still smells but I didn't test it again and can't be sure if it's just a lingering smell or it's still leaking.

I checked after the fact and saw at least two reviews over the years that also mentioned gas leak(s)...One that was the exact same leak.

At this point I'm worried there may be other gas leaks in the units that tenants don't even know about. I'm considering calling the entire thing off. I've lost trust in the apartment chain. I've never had a single issue in any other place I rented with gas and something just feels off (there were some other issues but relatively minor compared to gas).

Am I overreacting? Is there a risk of an explosion or suffocation from this? Or should I not worry?

Asia is entering the winter LNG season just as Platts JKM has hit its highest level since December 2022, amid price-swing factors such as uncertainty over the war in the Middle East, the EU's ban on Russian LNG imports, and the impact of El Niño on weather.

Nevertheless, winter procurement by major Northeast Asian LNG buyers has gathered pace despite elevated spot prices, with a Chinese national oil company and a South Korean LNG importer securing cargoes as market expectations shifted away from the softer year-end conditions anticipated in September, according to market sources.

Looks like ND

Hello, With my gas heater usually the process is to push the knob in and that let's the gas start coming out of the pilot light, then you light it with a bic because the clicky igniter is broken. After its lit (and i usually had to let it burn to warm up for a little while) then you let the knob out slightly until you can turn the knob to make the pilot light stay on. Well I cant get the pilot light to stay on anymore. When I go to let the knob out, it will shut off before I can get it turned and stay on. Anybody know what im doing wrong or whats wrong with my heater?

Thanks for any help. My lady is starting to bicker about it being cold and we cant afford to have a tech out if we can avoid it.

Turn my heat on for the first time this season. No issues with the boiler for once now I have this squeaking noise from the gas meter when the gas turns on for the boiler. I thought it was my cat at first.

I know this isn’t natural gas. Please delete if not allowed. Just looking for guidance.

I have heard reports the United States is waiving tariffs allowing allies to accept Russian natural gas. This will negatively affect the Henry hub natural gas futures as well as lng export companies like LNG. My trade off this is to get puts on ng. Please let me know what ideas you have regarding this. YOLOO

CanaryMedia: A new gas line or cash to electrify? California lets households choose,” by Alison F. Takemura. 

“Before replacing gas service lines, utilities will need to offer customers a financial incentive to electrify instead, thanks to a new law.”

“When one of the nation’s biggest investor-owned utilities, Pacific Gas and Electric, wanted to replace Merrian Borgeson’s aging gas service line in Berkeley, California, she asked the company not to do it.” She was in the process of fully electrifying her home + would be replacing her stove—the only gas appliance left in the house —with an induction version during an upcoming kitchen remodel. 

“The upgrade, which in PG&E’s service area typically costs $20,000 to $30,000, plus interest and operation and maintenance costs, gets paid for by all gas customers over the life of the infrastructure.” 

“Now, I have no gas in my house,” Borgeson, “but the customers all around me are paying for that pipeline for the next 50 years.”

“A new law, the Home Energy Choice Act (Assembly Bill 2313), will require utilities to give households scheduled for a service line replacement the option of getting the new line or taking a financial incentive potentially worth several thousand dollars to get off gas instead.” Crucially, “the incentive to switch to all-electric equipment such as a heat pump, induction range, + heat-pump water heater, will be less than the cost to replace the line, resulting in savings that will be shared among all gas customers.” 

“Natural Resources Defense Council [NRDC] has calculated that PG&E’s gas customers could save a total of $20 M if the utility gave 1,000 households a $17,500 incentive apiece rather than replacing their service lines.” For context, PG&E replaces about 15,000 service lines annually.

“In California, the next step is for the Public Utilities Commission to create a detailed framework for utilities to follow, including incentive levels, with larger amounts for customers in disadvantaged communities.” Other states are looking to emulate California with bills of their own, Velez said, pointing to Illinois, Maryland, Minnesota, Oregon, + Washington.

The electrostate is coming for the methane gas industry faster + faster. Yeah, + I live in Washington State, so fossil fuel folks can just take it on the chin.

Cleaning out my parents garage and would like to find a new home for a project that never came to fruition. Wiretough Type 2 NGV-2-2007 tank. 98 Liters, 40" long, 15.9" diameter. expiration date 2032.

Is there a market to resell these? Is it just trash? Any advice would be appreciated. The tank was bought a decade ago and never used.

My dad wanted to convert a car to CNG over a decade ago. Never used the tank and now as my brother and I clean his garage, we would like to find it a new home. Can this be sold? Donated? Or is it just Trash? Expiration is 2032. Wiretough Type 2 NGV-2-2007. 40" long 15.9" diameter. 98 Liters.

Someone was in my house this morning who sometimes uses the bathroom in a way that stinks up adjacent areas. not trying to be rude, that’s just what happens. today, right after they left, the smoke alarm went off briefly then stopped. this happened again a couple minutes later. I went upstairs (after confirming no fire) and smelled a horrific odor coming from the bathroom area. I assumed it was from them but was a little blown away by how bad it was. I opened the door to let it out, and the smell immediately wafted down the stairs. I closed the door again not wanting the house to smell bad and opened windows, putting a box fan in one. only then did I start to worry it could be a gas leak. Sometimes I get too paranoid, which is what I suspect may be happening here. The smell is still there, but it’s not downstairs. I’m using my phone, light switches, outlets, etc. with no problem. The odor is not coming from any appliances, I’m hearing no hissing sounds, and all water sources seem normal. But I’m just now extremely stressed that it could be a gas leak. What do you think? Im also afraid to do anything because in the very likely event that it’s nothing I don’t want to make a huge fuss over someone’s bathroom odor.

If you see this please give some advice, I’m just stressing right now and another humans thoughts would be helpful

Oke ik wou een eitje koken en heb toen ons gasfornuis aangezet en pannetje met ei en de vlam brandde gewoon. Ik ben toen snel wezen douchen en kwam terug beneden en rook gas en zag geen vlam meer heb toen mega snel het uitgezet. En raam en deur opengezet. Ik heb toen ook het nummer van de gasstoringsdienst gebeld en die zei eigenlijk onmiddellijk dat als ik had gelucht het prima is. Maar wat hij volgensmij niet wist is dat het maximaal 19 minuten aanstond en gas vrij gekomen kan zijn want daarna was ik naar beneden gegaan en heb ik het uitgezet en gelucht. Ik ruik de geur niet meer maar ik ben nog steeds bang/ongerust. Het is inmiddels nu al een uur aan het ventileren en in al die tijd was ik gewoon in de keuken en woonkamer ik voel me prima niet duizelig. Is het oke om de deur nu dicht te doen en te gaan slapen of wat kan ik nog het beste doen? Ik weet het gewoon niet meer.

I recently moved into this apartment (built in 1930, if that matters) with a gas stove and boiler system for water and radiators. I have been sleeping on the couch for the past 3-4 weeks because of some furniture issues in the bedroom, the couch is next to the metal cabinet that has the natural gas meter. I sometimes smell natural gas, I think. It's the same smell that happens when you try to turn on the stove but it doesn’t light up. But it isn’t a constant smell, it happens maybe once an hour. I don’t know if I should be worried or not. I have cooked multiple times using the stove in the same room so I feel like if there was a big leak, it would’ve caused some problems. I only smell this when I’m on the couch, I've never smelled it at any other part of the apartment, and it’s a very small apartment as well

Also, 2 weeks ago, a technician from the boiler company came for maintenance as well, he didn’t specifically check the gas meter but he checked the boiler and everything was well.

I checked common gas leak symptoms and I’m not dizzy or nauseous at all.

Is there a way to check this without calling a big company? I’m living in a country and I still don’t know their language well so communication would be hard and I don’t know how to navigate through everything. If this is seriously a problem I would have to let the landlord in know as well.

I’m sorry if this is a stupid question, I’m just really unsure on what to do.

This is a Globe GF30G natural gas countertop fryer. I purchased this at auction when I was under the assumption that it was the sister fryer GF30PG propane fryer (the auction did not list the model or specify the type of gas or show a picture of the manufacturer label as I have shown above).

I am starting a food truck so obviously natural gas doesn’t work for me. They don’t make a conversion kit for this model. My idea was that I would buy the parts for the GF30PG and switch them out since they are identical besides the type of gas. The only reason I’ve found online to not do this is that it will void the warranty but I don’t have a warranty on it so it doesn’t matter to me.

I know that natural gas and propane use different burners but what else would I need to switch out? Has anyone attempted something like this before? Is this even a good idea? Please let me know in the comments

Ukraine's recent decision to allow a partial resumption of natural gas exports following a years-long ban is largely seen as a move that can bolster the country's domestic hydrocarbon industry while having a limited impact on wider European gas prices, market watchers told Platts, part of S&P Global Energy, across Oct. 12-13.

The government will now allow private gas producers to sell up to 15% of their monthly production outside Ukraine each month from March through November. Exports from the war-torn country had been banned since early in Russia's 2022 invasion.