# Why line sizing is required? ## Why line sizing is required?

The main purpose of line sizing are: The purpose of line sizing (for common, water-like liquids, gases, and applications) is to fill in appropriate data on P&ID’s, datasheets, and line lists. To determine pump head requirements. To meet design process parameters such as flow, velocity & pressure.

## How do you calculate erosional velocity?

Erosional velocity equation = gas density, lb/ft3. API RP 14E (1984) suggested C=100 for continuous and 125 for non continuous service.

How do you find the diameter from the circumference calculator?

How do I get diameter from circumference? Divide the circumference value by the number pi (π), or use the formula d = c/π .

How do you calculate pressure drop on a gas pipe?

Calculate Gas Pressure Drop The pressure drop in the pipe is affected by items such as the internal roughness of the pipe material, internal pipe diameter, length of pipe, gas flow rate, pressure at the start of the pipe, and gas density at the entry condition.

### What is erosional velocity ratio?

The erosion velocity ratio (EVR) is the ratio between the flow velocity and the erosion velocity of the pipe. If the EVR > 1, then erosion is expected. If the EVR < 1, then there is no erosion in the pipeline.

### What is erosional velocity?

Erosional velocity is a velocity of the multiphase flow at which pipe erosion occurs.

Can you convert circumference to diameter?

If you want to find the diameter from the circumference of a circle, follow these steps: Divide the circumference by π, or 3.14 for an estimation. And that’s it; you have the circle’s diameter.

What is the circumference of 3.5 diameter?

Circumference & Areas

Size in Inches Circumference Inches Area in Square Inches
3 1/4 10.210 10.560
3 1/2 11.000 12.250
3 3/4 11.780 14.060
4 12.570 16.000

## What should I consider when sizing a gas line?

You should also consider that the customer may want to add appliances at a later date. Gas piping should be sized in accordance with the tables in the Standard Gas Code or by other engineering methods approved by local Authority Having Jurisdiction. When sizing the gas line make sure you add 5 feet per elbow to the total length.

## What is the pressure drop criteria used in single phase line sizing?

I used Norsok standard as pressure drop criteria in single-phase line sizing. You can use your own standard or you can determine the value of end pressure (P2) by yourself which is high enough to satisfy next equipment as mentioned in API RP 14E. This is an example. I have gas with the following properties.

What are the basics of inspecting gas piping?

We will discuss some of the basics of inspecting gas piping. The piping inside the house is called the gas supply line or building line. Branch lines run to individual appliances. The branch line terminates in a drop line, which is a vertical pipe dropping down to the appliance from an overhead branch line.

What are the steps in line sizing procedures?

Steps in Line sizing procedures. Step 1 – Assume line size. Step 2 – Calculate velocity by. V = Q / (Flow Area) Step 3 – Calculate the pressure drop by the proper method. Step 4 – Check whether calculated velocity & pressure drop falls within recommended ranges. If YES then select the line size

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