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Hi Sesquipedalianist, Could you please share a little bit more information? Like suction pressure, compression method and etc.

1503-44, Thanks you for your calculations. Diameter of pipeline will be calculated on later stage, after decision of compressor type and location. There is about 10 meter elevation difference sloop to APGT, so liquids in the pipeline theoretically can be collected at APGT area.

LittleInch, Feed gas is water saturated at operating P and T of 60C at tie-in point. GS do not want to update their design docs, so it preferred to locate any required equipment at APGT. [highlight #FCE94F]lot depends on what happens to the gas when it gets to your APGT as doing it that way...

1503-44, Diameter of LP pipeline is 500mm, HP 250. 4000 scm/h is the maximum expected flow. You right, we need to catch liquids before the compressor. Separation of liquids from gas is another challenge. Gents, any idea except slug catcher?

1503-44, From control point of view it is preferred to install compressor at APGT, but if there no other option compressor will be installed at GS.

Georgeverghese, As per operating map of the GSPA rotary-screw seems the best option for flow of 4000scm/h and discharge pressure 7 barg. I am not sure about centrifugal compressors, normally they require higher suction pressure. Plus there will be some pressure loses till compressor.

LittleInch, [highlight #FCE94F]just compress the LP gas into the high pressure supply at the GS[/highlight] That is the area I need you guys expert opinion. I need to know which type compressor will work at 1.002 bara suction pressure and flow of 4000 scm/h.

1503-44, There is no pipelines yet, just two tie-ins. We need to increase LP gas pressure after tie-in, and yes you right, inject gas to HP pipeline.

Yes, that is the problem. There is only just 1.002 bara at the tie-in point.

Diameter of LP pipeline 20", HP pipeline 10". Actually we are in the design stage and diameters can be changed. Yes, there is liquids in pipes. During treatment about 250kg/h water will be returned to GS for reinjection. Probably you right, ejectors will require higher pressure, but we can add...

Hi 1503-44, Flow rate of the high pressure pipeline is around 9000 scm3/h. [highlight #FCE94F]I hope there is a good reason that the two gas streams cannot be combined by compressing the lo P stress at the GS and then building only one pipeline.[/highlight] Pipelines can be combined, I am...

Hi all, I'll really appreciate some help regarding equipment selection. We are about to design an Associated Petroleum Gas Treatment plant. The plant will be located approximately 1.5 km from Gathering Station, and it is planned to lay two pipelines (high pressure 7 barg and low pressure) from...

Dik, S4. Grade 55 and 105 Charpy Impact Test Requirements at +5C S5. Grade 105 Charpy Impact Test Requirements at -29C

Rabbit12, Yes, you right. One of our client requires 35J/25J. The project I am working on at early stage, and we are trying to set general requirements for equipment, bolts and etc.. It is new client, and there is no client specs at all.

Rabbit12, I am referring to the supplementary requirement S5 of ASTM F1554: "The minimum Charpy V-notch energy requirement is an average of 15ft-lbs for three specimens, with no one specimen falling below 12ft-lbs."

retired13, thanks for link,

Rabbit12, F1554 bolts are passing -20F/-29C test without any trouble. But, I am not sure about -39C. Probably, I need to ask vendor to do some preliminary testing.

Hi all, In the current project, it is advised to use ASMT A320 Grade L7. Reason for that is cold temperature environment.Considering that, ASMT A320 Grade L7 expensive, I want to suggest to use ASTM F1554 Gr 105. The question is does it suits cold temperature as well? Absolute minimum in the...

It looks like misinterpretation of API 610 section 6.3.3 a), and 6.5.2