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Water Column

02/16/2017 3:30 AM

HI

Actually we have received a testing pressure requirement. in that the pressure has been mentioned as WATER COLUMN 1M ( both Liquid and gas ). min operating pressure 0 and max is ATM.

so help me to find out what kind of test i need to prefer for this?? hydro or pneumatic ?

Water column 1m = 1.42 psi. shall i take this as a testing pressure ?

or 1.5 /1.1 * des press

1. test medium?

2. test pressure ?

kindly pls help me to get cleared.

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#1

Re: WATER COLUMN

02/16/2017 3:49 AM

A1) Hydro

A2) Yes.

A3) water

A4) 1m water column.

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#2
In reply to #1

Re: WATER COLUMN

02/16/2017 3:59 AM

thank you .

i could not get the Test Pressure

1) 1.5 * 1.422 psi ?????

or

2) can i use 1.422 psi as a test pressure ?

because they mentioned TEST MEDIUM : WATER COLUMN 1M

PRESSURE TEST : WATER COLUMN (like this they mentioned )

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#3
In reply to #2

Re: WATER COLUMN

02/16/2017 4:09 AM

Is there some reason why <...they...> cannot be approached for the right answer?

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#4

Re: Water Column

02/16/2017 7:02 AM

Connect unit under test to the bottom of a vertical pipe of length greater than 1M using suitable couplings.
Fill the pipe to a depth of 1m abover the coupling.
If the unit under test still functions it is a "pass".
If the unit under test fails it is a "fail".
Or am I over complicating this?
Del

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#5
In reply to #4

Re: Water Column

02/16/2017 7:25 AM

The original poster would appear to be <...over complicating this...>.

Ahem - the forum has not been advised what a <...pass...> is and a <...fail...> is, as the test protocol has been withheld from the forum, which is why the original poster needs to go back to the <...they...> and find out.

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#6
In reply to #5

Re: Water Column

02/16/2017 9:47 AM

I think wet boots/shoes/pants/trousers constitutes a fail
Del
(go on gimme one of those arrows bouncing off the head... I love 'em)

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#7
In reply to #6

Re: Water Column

02/16/2017 9:51 AM

Happy to oblige...

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#8
In reply to #4

Re: Water Column

02/16/2017 11:16 AM

No, I think you put it down quite clearly. Good job.

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#9

Re: Water Column

02/16/2017 12:09 PM
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#10
In reply to #9

Re: Water Column

02/17/2017 2:55 AM

Taht's easy for U to say...
Del (I'll get my coat)

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#11

Re: Water Column

02/17/2017 3:22 PM

when one is testing a gas line such as natural or propane gas, a pressure test is needed to test for leaks.

in a similar fashion when installing say a furnace, a pressure adjustment is needed.

both these tests are done using a manometer which measures pressure in "inches of water" and not PSI (in USA). the test uses a standard pressure dial to read but is incremented in inches of water. this is most likely a throwback from the old "inches of mercury" testing. So no liquid is needed to do the test, just a gauge that reads it.

BTW: 1PSI = 27.7 inches of water. so as you can see these measurements are for low pressure levels.. such as to detect a leak.

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