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Month: September 2021

How To Estimate Capital Cost of Pipeline Project

Rifka Aisyah

In this post I want to share how to estimate capital cost of pipeline project. For your information, this procedure is for information and general guidance only. Source of this procedure is from Gas Pipeline Hydraulics by E. Shashi Menon. The book was published in 2005. So, the cost might need adjustment due to inflation.

Before we jump into estimation, we need to understand scope of pipeline project to easily define component of cost. There are ten (10) major cost components of pipeline project:

  1. Pipeline
  2. Compressor stations
  3. Mainline valve stations
  4. Meter stations
  5. Pressure regulating stations
  6. SCADA and telecommunication
  7. Environmental and permitting
  8. Right of way acquisitions
  9. Engineering and construction management
  10. Allowance for funds used during construction and contingency

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Reciprocating Compressor Power Calculation Part 3 (Four-Stage Compression)

Rifka Aisyah

In previous post, I shared how to calculate reciprocating compressor power if number of compression stage is two and three, respectively. In this post, I will use the same problem/example to estimate reciprocating compressor power if number of compression stage is 4. In the end of this posting series, I will show you the difference of each stage and to see how important to determine number of compression stages.

The method used to calculate reciprocating compressor is the same, whether it is two-stage, three-stage, or four-stage. There are several steps which is repetitive.

Example

Compress 2 MMscfd of gas measured at 14.65 psia and 60oF. Intake pressure is 100 psia, and intake temperature is 100oF. Discharge pressure is 900 psia. The gas has a specific gravity of 0.80 (23 MW). What is the required horse power?

Assuming number of stages is 4 Read More

Reciprocating Compressor Power Calculation Part 2 (Three-Stage Compression)

Rifka Aisyah

In previous post, I shared how to calculate reciprocating compressor power if number of compression stage is two. In this post, I will use the same problem/example to estimate reciprocating compressor power if number of compression stage is 3. In the end of this posting series, I will show you the difference of each stage and to see how important to determine number of compression stages.

The method used to calculate reciprocating compressor is the same, whether it is two-stage, three-stage, or four-stage. There are several steps which is repetitive. Read More