• About
  • Get Jnews
  • Contcat Us
Thursday, February 25, 2021
Write Paper For Me
No Result
View All Result
  • Login
  • News

    Trending Tags

    • Commentary
    • Featured
    • Event
    • Editorial
  • Politics
  • National
  • Business
  • World
  • Opinion
  • Tech
  • Science
  • Lifestyle
  • Entertainment
  • Health
  • Travel
  • News

    Trending Tags

    • Commentary
    • Featured
    • Event
    • Editorial
  • Politics
  • National
  • Business
  • World
  • Opinion
  • Tech
  • Science
  • Lifestyle
  • Entertainment
  • Health
  • Travel
No Result
View All Result
Morning News
No Result
View All Result
Home Tools and Tips

How does air affect a hydrostatic test?

mindmingles by mindmingles
March 27, 2020
in Tools and Tips
0
hydrostatic
0
SHARES
0
VIEWS
Share on FacebookShare on Twitter

Think about this for a moment; crews put so much of their time, effort, and care into installing a new water line. There were some changes in the occurrence of the weather, and a few unexpected scenarios came up. 

Besides these challenging situations, they continue to show their unwavering determination. They worked long hours to complete their project.

Content Summary

  • READ ALSO
  • 5 Skills Every College Student Had Better Learn Before Graduating
  • How to use Canon IJ Setup Tool

READ ALSO

5 Skills Every College Student Had Better Learn Before Graduating

How to use Canon IJ Setup Tool

But, hang on! There’s one more thing left to do, and that is pressurizing the line via the hydrostatic test to check whether the work is completed successfully or not. 

An overview of hydrostatic test:

Before directly jumping to the conclusion, let’s just start with the basics to understand the effect of air on a hydrostatic test properly.

Hydrostatic pressure testing is a common process in which pipelines, boilers, gas cylinders, and pressure vessels are tested for their validity. Testing prior to installing a pipe is essential because it demonstrates the quality of material and construction methods used, as well as helps in detecting leakage.

Forms of air in a pipeline:

The 2017 research published in researchgate.net explains that there are three forms of air present in any piping system:

  • Pockets of free air entrapped in parts of the piping system. The removal of these air pockets is usually done by venting out accurately at high points. 
  • Distribution of air bubbles throughout the pipeline and these air bubbles over time coalesce to form free air pockets.
  • The dispersion of dissolved air throughout the fluid is generally not visible. 

The influence of trapped air on a hydrostatic test:

If you observe a decrease in the pressure during a hydrostatic test, it does necessarily mean that there is a leakage. 

Other contributing factors can lead to a change in pressure. Variations in temperature can result in pressure changes, and they can mask small leaks. In the same way, trapped air can also conceal the effects of leaks. This is because free gas pockets greatly affect the compressibility of the water in the piping system. 

The presence of small leaks may result in less pressure loss because of the existence of expanding air in the pipeline.  Thus, it keeps the pressure constant. 

While performing the test, the presence of entrapped air creates a problem in identifying the leak. Moreover, it also becomes difficult to determine the amount of air present. The amount of entrained air can be detected during pressurization. 

If your pipe has a small leak, the presence of expanding air can prevent the detection of the leakage. 

The presence of highly compressible air within the pipeline will reduce the pressure during the test. Thereby, it will cause slower changes in the pipe’s pressure, and the detection of the leaks via the hydrostatic test becomes a hassle. 

According to quora.com, water contains 2 percent of dissolved air. This dissolved air comes out of the water, usually due to the pressure drop. The increase in temperature can also elevate the air release because the water’s vapor pressure increases with the temperature. 

A mathematical formula is used to comprehend the occurrence of leakage. The air generally dissolves in water, and the application of pressure slowly dissolves the bubbles into the water, and the pressure is reduced. Thus, it makes the test fail. 

If the percentage of air exceeds 2 percent or, in some cases, 0.2 percent, the test is canceled, and the line is refilled again.

Venting the air from the pipeline is important!

The above information gives you plenty of knowledge about why the removal of air is vital to perform a hydrostatic test. The question is: what measures can you take to prevent the air?

During a hydrostatic test, the air is usually trapped in local high points of a pipeline that can hinder leakage detection. The design of the pipe should be done in such a way that it should have slopes and high-point vents.  It will allow the air to be released from the system. 

Usage of ultrasonic testing can verify the absence of any entrapped free air pockets. You can also follow these steps to conduct a proper hydrostatic test:

  • Fill the line slowly with water, and this will increase the chances of removing air from the conduit
  • Make sure to fill the line from the lowest possible location to allow the air to purge from the highest location
  • Have patience and allow the air to vent out completely
  • Connect the test pump to the lowest point of the line and prepare the pump to empty the air
  • Also, connect the pressure gauge to the pipe (not the pump) to the lowest location
  • Isolate the pump from the line during the test period
  • Isolation of a new line is also essential for pressure testing as well as a new line should be chlorinated appropriately before connecting it with the service line.      

Keynote:

The hydrostatic test ensures the correct construction vessels, pipelines, and tanks and also identifies leakage. The air trapped in a pipeline system affects the hydrostatic test negatively because it fails to recognize the leak. That is why the venting of air is necessary.  

Tags: hydrostatic test

Related Posts

5 Skills Every College Student Had Better Learn Before Graduating
Tools and Tips

5 Skills Every College Student Had Better Learn Before Graduating

November 3, 2020
Canon IJ Setup
Tools and Tips

How to use Canon IJ Setup Tool

October 30, 2020
Next Post
Remove Dandruff Permanently

How to Remove Dandruff Permanently

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

POPULAR NEWS

30 Killer Ideas for Small Businesses

30 Profitable Small Business Ideas for Those Who Dare to Dream

February 6, 2020
Asset management is importan

article

February 4, 2021
5 Ways to Protect Your Online Data from Online Snoopers

5 Ways to Protect Your Online Data from Online Snoopers

February 22, 2021
Fresh Vs Canned Tuna and How to Choose the Best Seafood Supplier?

Fresh Vs Canned Tuna and How to Choose the Best Seafood Supplier?

February 6, 2020
You Need A Chiropractor For Your Back Pain

You Need A Chiropractor For Your Back Pain

February 6, 2020

EDITOR'S PICK

finance education loan

Know How You Can Finance Your Higher Education

February 6, 2020
soccer coaching equipment

Soccer Coaching Equipment Checklist: Top Practice Aids To Have

February 6, 2020
Benefits of carpooling that you should know about

Benefits of carpooling that you should know about

February 6, 2020
QuickBooks Error 3371

QuickBooks Error 3371: Solved [December 2019]

February 6, 2020

About

We bring you the best Premium WordPress Themes that perfect for news, magazine, personal blog, etc. Check our landing page for details.

Follow us

Categories

  • Android
  • Automotive
  • Career
  • Dictionary
  • Digital Marketing
  • Education
  • Finance
  • Home Improvement
  • Jobs
  • Legal
  • Tech
  • Tools and Tips
  • Uncategorized
  • Writing Services

Recent Posts

  • 5 Ways to Protect Your Online Data from Online Snoopers
  • Women Fashion: Essential Tips for Business Wear
  • TRENDING TECHNOLOGIES IN 2021
  • article
  • Buy JNews
  • Landing Page
  • Documentation
  • Support Forum

© 2021 JNews - Premium WordPress news & magazine theme by Jegtheme.

No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • Politics
  • National
  • Business
  • World
  • Entertainment
  • Fashion
  • Food
  • Health
  • Lifestyle
  • Opinion
  • Science
  • Tech
  • Travel

© 2021 JNews - Premium WordPress news & magazine theme by Jegtheme.

Welcome Back!

Login to your account below

Forgotten Password?

Create New Account!

Fill the forms below to register

All fields are required. Log In

Retrieve your password

Please enter your username or email address to reset your password.

Log In