[MW:0] Re: Calculation of purging and shielding gas

pl. find an Excel spreadsheet for calculating purge times.

source: www,sperkoengineering.com
---------- Forwarded message ----------
From: Karthik <karthik6...@yahoo.com>
Date: Oct 15, 12:51 pm
Subject: Calculation of purging and shielding gas
To: Materials & Welding

Hi,
Please find below.
First you find how many minutes has the welding taken, multiply this
by the flow rate (in litres per minute) then divide by 1000 to give
you the amount of gas used in cubic metres

For example a pipe butt takes you 15mins to weld and you use a flow
rate of 6 ltr per min and you have 20 butts to weld.
15X6X20 = 1800 litres of gas used. This equates to 1.8 cubic metres of
gas.

You can also calculate how many butts you should get per cylinder
15X6 = 90 litres or 0.09 cubic metres of gas per butt
Argon cylinder contains 12.10 cubic metres so
12.1 divided by 0.09 = 134.4 butts per cylinder of argon

With regard purging, just do the same. Length of purge time X flow
rate divided by 1000

Thanks & Regards,
(Karthik)

Karthikeyan.S
QA/QC Manager
Getabec Energy Co.,Ltd.
379,Moo6,Soi8,Nikhomphatana,
Rayong-21180,
Thailand.
Phone: 0066 38 897035-8 (Off)
Fax: 0066 38 897034
Hand Phone: 0066 892512282

--- On Fri, 10/15/10, limesh M <limes...@gmail.com> wrote:

From: limesh M <limes...@gmail.com>

Subject: [MW:7581] Calculation of purging and shielding gas
To: "Materials & Welding" <materials-welding@googlegroups.com>
Date: Friday, October 15, 2010, 2:26 PM

Dear All,
How we can calculate the purging and shielding gas requirement ?
Anybody have any excel sheet or worked out example ?
 
Regards,
 
Limesh

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