Recent content by GarethChem

Hi EmmanuelTop and sshep It's quite suprising to me that API doesn't have commissioning standards, they even have standards on hydrotesting tanks (API 650). Thanks for the help! Gareth

Hi everyone I just wanted to find out if anyone knows if there is an API standard or similar for commissioning (particularly for a tank farm). Thanks! Gareth

I agree 100% with everyone else. You definitely require a PSV and should do a HAZOP. Even though you will never operate at 1375psi, you need to remember if there is a fire, the metal weakens and pressure increases. PSVs are very reliable (0.01 - 0.67 faults/year for a 1/1 system...

Hi everyone I have tried searching for an answer on the forums and google and can't find anything conclusive. I used to work for a company who said that every time that a PRV lifted, it had to be taken out and reset as the spring became unreliable (though this was never done in practice, this...

Vented....

Thanks for the article Snorgy. BigInch - Why's that? A 15m (50ft) length of 200NB pipe (8") is just less than 0.5m3. To me, if a line that size is liquid full, it'd be a serious problem, especially if it is one of the lines just after the outlet nozzle of the LPG sphere... Or am I missing...

I agree, an excessive amount of TRVs is the only thing I can think of. Thanks everyone, glad to see I'm not the only one that thought that it was necessary for small volumes too :) BigInch - you said it'd work for you, do you mean that you agree with the FEED (i.e. not required on smaller...

Hi Shunoff There are a lot of NFPAs, the ones that I've used on tank farms so far are: NFPA 11 - Standard for Low Expansion Foam NFPA 13 - Installation of Sprinkler systems NFPA 16 - Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems NFPA RP 14G - Recommended...

Hi everyone I read the following in a FEED: "LPG - any section more than 500L of LPG that can be blocked in shall be provided with a TRV." Do you have any idea why there is a limit to the smallest volume that requires a TRV? I'd imagine a rupture in the line or flange or a failing gasket is...

It's gasoil & mogas... I am not sure if it was designed properly, though I know everything is EX except motors are IP56. Thanks for the help though! Will definitely have to see if they are even using work permits o.O Hopefully they are. But I know it's so remote that they don't have water to...

Thanks LittleInch. I figured it would probably have something to do with the electrical zone ratings, was hoping for a "20m from pumps" kind of an answer :) They didn't do zone classification for this plant - working in Africa is veeeery different....

Hi Welderturnedqc, and welcome If I can add to what the other guys said - the flange rating also has to do with the operating temperature - the higher the operating temperature, the lower the pressure rating. You might find this link useful, it has the pressure ratings for a few different...

I never said thanks for your feedback BigInch and LittleInch, so thanks :)

Hi all I have been asked to commission a tank and am concerned about future work on site. They will be continuing with hot work a little distance from the tank while the tank has been commissioned (though it will be a different system). I haven't been to this particular site yet so the distance...

Thanks so much BigInch - I thought there might be a bit of contamination allowed (since Jet A1 and Diesel have overlapping carbon chain lengths, I figured that only C16-C21 would be contaminants). Seems it is a lot more complicated than that! Thanks for the info! You seems to always have the...