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How To Estimate Vessel Weight

Estimating vessel weight is not usual daily task of a process engineer. However, I found it useful to know how to estimate vessel weight, when we need to estimate vessel cost. In other chance, civil engineer also asks about vessel weight to design the equipment foundation.

To better estimate vessel weight, we need to understand vessel weight components. Those are weight of the shell, the weight of the heads, and the weight of internals, nozzles, pedestals, and skirts. Read More

Inert Gas Consumption for Tank Blanketing Calculator

In this post I want to share calculator to estimate inert gas consumption for tank blanketing. Please be noted that the result is average inert gas consumption. For peak consumption, please check my previous post.

I think this is the second time I created calculator. I am quite satisfied with the results because I used plugins.

I hope you find this post useful.

Inert Gas Consumption for Tank Blanketing

Inert gas is used to blanket certain fixed-roof tanks for safety. Nitrogen is a common inert gas used for the purpose. In addition to safety of storage tank, the benefit of tank blanketing includes improved product quality and equipment life cycle.

Why nitrogen is commonly used in tank blanketing?

Nitrogen has inert properties, wide availability, and relatively low cost at any economic efficiency. Other gases, such as carbon dioxide or argon, are also sometimes used for certain application.

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I Tried Using Aioflo Pipe Sizing and Flow Calculation

In this post, I want to share with you my experience using Aioflo Pipe Sizing and Flow Calculation. I found this software when searching for Uconeer professional unit conversion program.

Katmar Software developed many engineering software, one of them is Aioflo Pipe Flow Calculator. Aioflo can calculate pipe sizes, flowrate, and pressure drops for liquids and gases. This is a screenshot of the software.

Screenshot of Aioflow Pipe Size and Flow Calculation
Screenshot of Aioflow Pipe Size and Flow Calculation

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How To Estimate Optimum Insulation Thickness

In previous post I shared how to estimate insulation thickness for both flat surface and cylindrical surface. In this post I want to share how to estimate optimum insulation thickness.

The total annual cost of insulation is the sum of the cost of heat energy lost and fixed cost. A plot of cost vs insulation thickness will determine the most economical insulation thickness. A dimensionless factor can be used to calculate insulation thickness, depending on the ratio of insulation thickness to pipe diameter in the following equation:

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Hydrate Prediction using Vapor-Solid Equilibrium Constant

In previous post, hydrate in natural gas system can be estimated by two approaches, which are approximate method and analytical method. Approximate method used when gas composition is unknown. It uses pressure-temperature correlation to predict hydrate formation temperature.

In this post, I want to share how to predict hydrate formation using analytical method, which uses vapor-solid equilibrium constant. Vapor-solid equilibrium constant is expressed as below:

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Hydrate Prediction using Pressure-Temperature Correlation

A hydrate in natural gas system is a physical combination of water and other small molecules to produce a solid which has an “ice-like” appearance but has a different structure than ice. It resembles dirty ice but has voids into which gas molecules will fit. Most common compounds found in gas hydrate are water, methane, and propane, or water, methane, and ethane.

Hydrate formation in natural gas transmission pipeline
Hydrate formation in natural gas transmission pipeline

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