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Dear pierreick Hi. the safety matrix (thresholds)??? Could u please explain it?

Hi. Would you please help us about technical problem we encountered? In attached PFD, during normal compressor shut-down operator increases opening of 05-330-FV-015 and 016 (1st and 2nd stage compressor anti-surge valves) and at the same time decreases compressor speed. When anti-surge...

No, there is about 4% increase in liquid fraction, outside of the rurbine.

Dear all. Hello. I have a question. would you please help me? Normal/min/max steam temperature to the steam turbine is 410/400/430 C (pressure: 40 barg). But right now inlet steam temperature is 360C!!! due to operating limitations. What is the mechanical and operating effects of this...

I couldn't get your point! You are saying that n2 can not deliver overpressure? Well, max. n2 header pressure is 8 barg, so it can overpressure the drum!

Hi. My last post has been deleted!!! Here is my question. N2 fail mode is fail open. Suppose the power unit fails, so all control valves fail to safe mode and n2 control valve open completely and drum pressure reaches 8 barg. Could we change fail mode of n2 control valve to close? (In order to...

Dear Ed stainless According to our lab team statements, due to very high equilibrium vapor pressure of methane in water, they are not able to do any test...

Dear Ticl4 and all other dears... Goal: setting a system up to determine if our tubes are leaking in the first place, using determination of presence (or ot presenece) of hydrocarbon gases in water. Unfortunately gas detectors above cooling towers stack is out of service, and have operarional...

Dear all. Hello. Why in most industrial plants, cooling water vlave of heat exchabger is manual (non control valve)? I think we can conserve lots of e energy using regilation of cooling water flow through heat exchanger in different plant load

We are not sure about that...

Dear all. Hello. Due to tube failure of heat exchanger, methane gas enters into water cooling. We are going to measure the gas component in water to ensure tube failure. Unfortunately LAB section is not able to determine gas content in water in this way. We are considering to flash water stream...

Well, we are currently using plastic container (Rigid PP or PE). But operation section is really concern about safety issues of this task...

Dear all thanks for your kindly replies.

Dear all. Hello. I have a question. Would you please help me? We want to storage and transport methanol for a short period of time (loading from one tank and unloading to the other tank- distance: 500 m). Currently we are using plastic container. Is there any safety guideline in NFPA or other...

Dear Mr Jcronin, I'm not disrespecting You! I'm just evaluating and reading more references. I can not tell anymore, when I don't have something to Say!

Lab analytical result: minus 90 C, for our natural gas! You know that dew point is dependent on gas composition and pressure and temperature Don't you think your are over Strict? 0.17 bar vs 0.3 Bar??!!!

"Increase from 0.3bar to 0.4bar is a 30% increase." Yes, but its just 0.1 bar increase! "so is your flow at max design flow?" No, we are working on 75% design capacity. So are you injecting MeOH all the time now? No, due to product pollution with methanol our management insist on not injecing...

Dehydration unit is working properly. But my question is dont you think the difference between allowable and calculated is very Narrow???

Hi everyone. I have a question. Our Coldbox vendor provided two variables for natural gas stream enter the coldbox: 1- Calculated pressure drop: 0.3 bar 2- Allowable pressure drop: 0.4 bar Don't you think the gap between two variables and also the second variable value is very low?! According...

Thanks Jones. Owners policy: its obvious! No brittle fracture. I couldn't fully get your point. LTCS cannot stand - 89 c temperature, so did the designer something Wrong???