mig flow rate chart

8/8/2019 MIG Flow Rate Chart

1/4

MIG GunNozzle SizeInside Diameter

MinimumSuggestedFlow

TypicalFlowSetting

MaximumSuggestedFlow (1)

1/2 inch (Typical onSmall Welders)

18 CFH 22-27 CFH ~40 CFH(2)5/8 inch (Most

Industrial Welders)22 CFH 30-35 CFH ~55 CFH

3/4 inch (For LargeSize Cored Wire)

30 CFH 30-40 CFH ~65 CFHNotes: (1) Maximum flow rate limit is set to avoid excess shielding gas turbulence that,if exceeded, w ill pull in moisture laden air. These values are somewhat higher thandefined in art icles by The Welding Institute (UK) and the manager of welding R&D forPraxair (which states flows should not exceed 50 CFH for typical 5/8 inch ID nozzle)since if CO2 is used it can handle the somewhat higher values shown. Exceeding thesesuggested maximum flows will not help handle drafts! If draft is over ~ 4 to 5 mph use awind br eak. (2) Flow is measured in CFH (cubic feet per hour ) NOT in pressure (psi.)

See www.NetWelding.com for information on the ideal

MIG Shielding Gas Control and our patented,inexpensive Gas Saver System that improves weldstart quality by reducing the blast of gas at each weldstar t and cuts total gas use in half.It is available for purchase on the web site.

Copyright 2011: Welding A cc essor ies Technology www.NetWelding.com

WA TechnologySUGGESTEDUGGESTEDMIG WELDING SHIELDING GAS FLOW CHARTIG WELDING SHIELDING GAS FLOW CHARTExc eeding Maximum Flow Pul ls in Ai r Making Shield ing Worse!Our Patented Gas Saver System Reduces the Blast of ShieldingGas at Each Weld Start Reducing Spatter and Total Gas Use.


2/4

Copyright WA Technology, LLC; All rights Reserved. www.NetWelding.com

Know Someone with aFabrication Shop?Do Them a Favor and Have ThemReview the Shielding Gas SavingInformation on Our Web Site:www.NetWelding.comHave a Home Shop and Ever

Run Out of Shielding Gas on aSaturday or Sunday?

We Have a Solution That GivesTwice the Warning Time Before

Needing a New Cylinder:How Much Gas Can Be Saved??The best way to show the savingswith our inexpensive, patentedGas Saver System (GSS ), is with anexample from one of our industrialcustomers. They tested the systemthen bought them for all 35 of theirMIG welders.

A Texas TruckBox manufacturerevaluated thesystem on a

repetitive job,welding doors.With theirstandard gas

delivery hose they welded 236 doorswith a full cylinder of shielding gas.Just substituting their gas hose withour patented GSS, maintaining thesame flow settings they welded 632doors! That's a 63% reduction inshielding gas use.

Weld Performance ImprovementA small shop owner provided this

feedback after hepurchased a 3 footGSS for his smallMIG welder. AlHackethal reportedthese findings:

Well, I can't believe it. I neverthought a hose could make thatmuch of a difference. I had a small job that's been waiting for a while.The weld quality, and evenpenetration is considerable better.Almost no spatter! The weld seemedto be hotter and I turned my MIG

down a notch.Initially thought that my imaginationhad kicked in, but then realized thatthe gas I'm buying is actuallyworking the way it's supposed to.Glad I found your website. This isone of the few things that reallyworks better than any info couldsuggest. I understood the theory,though in practice I understoodmuch better after the first couple of

welds. Now I have better lookingwelds and almost no spatter, whichmeans less grinding and finish work!In addition, the tip was cleaner afterthe job I just did.This will provide savings in time,labor and maybe even consumablestoo. As a one manshop there's neverenough time for anything.

Al also has a TIG welder with 300

amp water cooled torch and boughtone of our Leather Cable Covers.His email said this about it!

Oh, the leather wrap for my TIGhoses worked very well and fitsperfectly. I'd just replaced the hosesand was looking for something toprotect them that was better thanthe nylon wrap that's availablearound here. Now I'mTIGingagaintoo, and much safer. It's good

to know the coolant hoses are wellprotected. Much better than using a300 amp TIG and then realizing that Iwas standing in a puddle of coolant,which is what recently happened.Can't pay the bills if I electrocutemyself!

Thanks for making productsaffordable.
http://www.netwelding.com/http://www.netwelding.com/http://www.netwelding.com/


3/4


Another Home Shop Writes AboutGSS SystemPerry Thomasson has a very wellequipped home shop. He uses a 175amp MIG welder. However the smallwelder cart only held a medium sizeshielding gas cylinder and Perry

wanted to reducethe number oftimes he had tohave it filled.

He purchased alarge cylinder andchained it to theshop wall. Heneeded a longergas delivery hose

so he added a 50 foot conventional 1/4 inch ID hose.He found he was using a lot of gas.

Perry purchased a 50 foot long GSSand saved a significant amount ofshielding gas while improving hisweld starts by reducing the startinggas surge. Since hisregulator/flowgauge had a hose barbon the output, we supplied Perry

with a splice connection on thesupply end of the GSS. He simplycut the existing gas delivery hoseclose to the regulator and spliced inthe GSS hose. The welder end usesa standard CGA fitting that issupplied with the system. (Ofinterest, his brother just purchasedthe same system for his welder!)

Perry emailed a picture and said;

" The system works great. Thanksfor the professional service and agreat product."

A Professional Street Rod BuilderHad This to Say About the GSS:They use a 250 amp MIG welder withbuilt in feeder and a 6 foot gasdelivery hose. With their standard

gas delivery hose the peak shielding flow at weld start was measured at150 CFH, far more than needed andenough to pull air into the shieldingstream. Air is then sucked into thegas stream causing poor weld startsand possibly weld porosity.

With the GSSreplacing their existinghose, the peak flow surge at the weldstart was about 50 CFH and it quicklyreduced to the 25 CFH setting. Withthe many short welds made and frequent inching of the wire, theyused less than half the gas and hadbetter starts.

Kyle Bond,President,

indicated abig benefit isthe reducedtime and

effortchanging cylinders since itsrequired less frequently. He quicklysaw the improvement achieved inweld start quality as a significantadvantage! Kyle, an excellentautomotive painter, was well aware

of the effects of gas surge caused bypressure buildup in the delivery hosewhen stopped. He has to deal withthe visible effects in the air hoselines on the spray gun in his paintbooth! It's too bad we can't see theshielding gas waste as Kyle can theeffects of excess pressure when hetriggers his spray gun! The paintsurge is visible and creates defectsunless the gun is triggered off the

part being painted! Kyle canmanage the surge by triggering thepaint gun off the part; unfortunatelywe cant start our weld with the MIGgun off the part ! The GSS has a builtin surge flow limiting orifice thatkeeps the peak flow from becomingexcessive. So you not only save gasyou improve your weld starts!


4/4


How Does The GSS Work?Gas waste occurs every time theMIG gun trigger is pulled even if itsonly to inch the wire to cut off theend. This is why:

To keep flow at the preset level thegas pressure in the cylinderregulator will be between 25 and80 psi. Flowgauge regulators (thosewith a flow calibrated pressuregauge) operate in this pressurerange as well.) However to flow

shielding gasthough thewelder and

torch

typicallyrequires 3 to

8 psidepending on

restrictions.Therefore

every time welding stops, thepressure in the gas hose raises tothe regulator pressure of 25 to 80psi. That stores up to 7 times theamount of gas as the physical hose

volume. This is similar to a shieldinggas cylinder which holds about 150times the volume of gas as thephysical volume of the cylinder dueto the high pressure!

The patented GSS stores over 80%less gas then typical shielding gashoses. In addition to the wasted gas(which you can hear when you pull

the MIG gun trigger) the high flowcauses air to be pulled into theturbulent shielding gas stream! Thisis like starting with the gas cylindershut off! You have probablyexperienced that before when youforgot to open the cylinder valve!

It takes a short time for the shieldinggas flow to return to a smooth lessTurbulent (Laminar) flow even whenthe start gas surge flow reduces.That can take several seconds sowhen making short welds or tackwelds youre not getting all thebenefits of the shielding gas yourepurchasing!

SUMMARY:The patented GSS can cut your gasuse in half or more. It also has asurge restriction orifice built into thefitting at the welder- wire feeder end.That limits peak flow (but not yourset flow) to a level that avoids excessturbulence for better starts. Itallows a controlled amount ofshielding gas to quickly purge theweld start area. The steady state

flow is set with your existing flowcontrol device, flowmeter offlowgauge.

All you need to do is replace theexiting gas hose from cylinderregulator to welder with ourpatented GSS. It is available invarious lengths at:www.NetWelding.com.

There are more testimonials at:http://www.NetWelding.com/production_test_results.htmHave more questions? See:http://www.NetWelding.com/Overview_GSS.htm

Or email us at:[email protected]
http://www.netwelding.com/http://www.netwelding.com/http://www.netwelding.com/production_test_results.htmhttp://www.netwelding.com/production_test_results.htmhttp://www.netwelding.com/production_test_results.htmhttp://www.netwelding.com/Overview_GSS.htmhttp://www.netwelding.com/Overview_GSS.htmhttp://www.netwelding.com/Overview_GSS.htmhttp://www.netwelding.com/Overview_GSS.htmhttp://www.netwelding.com/Overview_GSS.htmhttp://www.netwelding.com/production_test_results.htmhttp://www.netwelding.com/production_test_results.htmhttp://www.netwelding.com/

mig flow rate chart

Documents