Dear All,
Date: Sat, 11 Aug 2012 20:57:53 +0530
Subject: Re: [MW:15066] HYDRO TEST
From: cswipquestions@gmail.com
To: materials-welding@googlegroups.com
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The answer as " BOLD "
Thank & Best Regards,
M Veera SAMY- Bureau Veritas.
Coimbatore
Date: Sat, 11 Aug 2012 20:57:53 +0530
Subject: Re: [MW:15066] HYDRO TEST
From: cswipquestions@gmail.com
To: materials-welding@googlegroups.com
Dear Gents,
I am not an expert in hydro test. But I like to share my understandings with you.
[2] Reasons for air entrapment
[3] Precautions
I believe that the above points will helpful to you
With regards
I am not an expert in hydro test. But I like to share my understandings with you.
[1] If air lock presents
- You cannot get accurate pressure readings
- Unstable pressure
- The entrapped air may cause damage to your equipments, because of expansion of air (you don't know/can't measure the volume of entrapped air)
- It may cause severe failure to your piping system (Air energy is severe than hydro energy)
[2] Reasons for air entrapment
- The general all places filled with air, so the pipe is not empty. you are going to replace air with water.
- So now you know that the principal reason for air entrapment is you are trying to fill water without removing the air (no ventilation).
- Some times poor ventilation, I mean water filling high in volume but vent size is too small or no of vents not sufficient.
[3] Precautions
- Ensure the piping system have necessary vents and drains
- Before starting water filling open all vents
- Fill water slowly avoid turbulence
- Overfill and watch water discharge at vents for bubble free water falls.
- If bubbles present overfill until bubble free water discharge achieved.
I believe that the above points will helpful to you
With regards
On Sat, Aug 11, 2012 at 8:56 AM, Sampath Kumar <skthatham@gmail.com> wrote:
Dear Experts,During Hydro Test if air gets locked[Air Lock] [1] what will happen? [2]What is the reason for air lock?[3]What is the precautions one has to take to avoid?pls explain.Thanking you allWith Best Regardssampath
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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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