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I got no experience in doing commissioning and yet I was asked to write the operating & maintenance manual. I have a doubt as follow, Is it practical to purge all the vessel with natural gas before starting up the unit? or just the Contactor? Is it true that the glycol will get degraded if...

what is the usual cylinder size designed for methane storage? I got a problem as below. 20 kg of methane temp = 30 C the pressure of methane in the cylinder needs to be about 70 barg to have reasonable cylinder size (0.3 m3).

Thanks for your comments. May I know the equation to calculate the Stiff Davis Saturation Index or can you tell me where to get the equation? Thanks

Hi guy, I have a problem using seawater as a cooling media. In the case, the flow of seawater need to be minimised causing the outlet temp to increase. As such, scaling become a problem when the outlet temp reaching above 40 C. Someone has suggested to use 90/10 CuNi tube, does anyone know how...

Hi guy, Regarding PSV sizing for fire case, my customer is very concern about the relieving temp during a fire. how to calculate or estimate the relieving temp for isothermal approach? the guy made a sentence as follow,"un-wetted & wetted conditions, the relieving temp may be different" Is...

Is depressurizing of a vessel designed for fire case only? Is it correct to think of fire when designing the depressurizing of a system? As per API RP 521, 3 factors need to be considered during depressurizing. 1) temp increases due to heat input to the vessel causing liquid to vaporize. 2)...

Hi guy, Does any of you know what topic is about for the above mentioned code? If there any way to get these shell design manual? is it accessible to public?

I use HYSYS to simulate my TEG dehydration project. This is a new design plant. My customer wants to know how much chemical (for PH control) to be initial fill to the system. As such, I have to estimate the PH value of the solution in order to determine the amount to be added. I tried to add...

Hi guy, I have a flash gas separator (3-phase separator) use to separate the natural gas from TEG solution (+ liquefied HC). the flash is a vertical vessel. Oil skimming is done manually (there is a bucket in the vessel). Here is the question posted by my client: How to know the oil-water...

Gas dehydration using TEG I would need to determine the flow rate of the ph control chemical (borax) to the dehydration system. but first, I would need to know how to estimate the PH for the TEG solution. the pH control chemical will be injected to the flash drum (is this the best place to...

Hi guy, thanks for your valuable comments. here I got another doubt on the relieving temp for fire case relief. With reference to API 520/521, relieving temp = operating temp/operating pressure x relieving pressure however, my client told me that PV = nRT is valid only for adiabatic and...

hi, looking forward for anyone who is experienced in natural gas processing industry. see below for my case. gas dehydration design natural gas flow rate: 110 MMSCFD glycol circulation rate: 15 gpm gas entering contactor at 97 F, 855 psig CO2 content< 5% questions posted by my client, 1) pH...

hi, I am looking for some infor regarding corexit 6752, which is used for ph control. Does anyone know which company offers the chemical?

Hi,I have some doubt regarding the sizing of PSV. Here is the case: the contactor will be operating at 100F, 855 psig. The PSV sizing for the contactor shall be based on fire case. The contactor shall be packed column. The latent heat of glycol solution at 855 psig (corresponding boiling...

Hi guy, I would appreciate if any of you can answer the questions below. what should be the chemical for ph control? how to determine the initial fill and the subsequent daily consumption for the chemical(in teg system)? any recommend chemicals for antifoam? where can i get the MSDS for the...