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Time to run air lines

want to do it right!

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Bill Ford

01-01-2002 07:53:15




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I am rebuilding my Dad's old workshop. I have insulated, have walls and ceiling a bright white, and just mounted lighting fixtures. Now it's time to run air lines and I am looking for advice. I will be using the standard assortment of air tools, a bead blasting cabinet, and eventually quite a bit of painting (HVLP). Any advice about piping materials or methods will be appreciated. Do I need some sort of air dryer to do decent paint work? Thanks guys.

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M.R.

01-02-2002 10:23:35




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  
Here is one kind to look at for air lines, floor heat, etc. You will have to go to the catalog under 'Plumbing' and pull-up pages 282-283.



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Dale E.

01-02-2002 10:02:40




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  
Bill, I have piped in several dry cleaners/laundries, in them we use gal. pipe for headers with risers and drop legs and reduce to 1/2" flared copper for tie-ins with separators,regulators and lubricators at equipment (refrigeration for over all system moisture control). In my tractor transformation shop I don't get so elaborate. I use gal. headers with a slight fall back to the compressor (and drain there) with straight drops with automatic discharge moister separators before going to a hose. Does fine and saves a whole lot of fittings.Keep in mind that when warm (moisture laden) compressed air cools it will condense and form water droplets. Dale

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DumOLeBob

01-01-2002 20:47:05




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  
As usual lots of great tips here from the guys! The only thing I can add is look at TP Tools Catalog. They too have some super suggestions with diagrams as to air lines esp for blast cabinets & painting. It may also be on their WEB site, but do yourself a favor & ask for their catalog. (No I don't work there, my dad doesn't own it, but I do have one of their blast cabinets & love it!) Click the link below to TP Tools.

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mrm

01-01-2002 14:46:32




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  
Copper is great if you can afford it.Another alterative would be the nylon,plastic,? air lines
that almost every semi truck in the country has
been useing for years with success.Check with a truck parts dealer on price and fittings,very easy
to run and hook up.



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bill b va

01-01-2002 14:24:44




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  

i strongly recommend ridgid copper tubing for your air lines . i used be a maintenance mechanic in a factory that had both copper and iron . i have seen people on here say use black iron some say use galvonized i dont know why because the pipe rusts on the inside from the moisture and the outside dosen't matter in a dry location.the copper is much easier to work with and make changes if needed .as for plastic the only experience was with cpvc and it all started splitting after about a year and was replaced with copper .as for pvc i have heard it is ok for air lines .my house was built 9 years ago and all of the water lines are copper.i would never put plastic lines inside of walls .i think plastic is outstanding for sewer and other non pressure applications

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Werf

01-01-2002 11:42:01




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  
You want to do it right. OK. I would not use copper pipe. If you do make sure it is rated for ove your compressors rated output(175psi for most 2 stage comp)I would NOT use any plastic of any type for air lines.After material selection, run a complete air header around your shop, connecting both ends with a supply line from your compressor.Look at where you will use air now and where you may want air latter. Use a tee where you want a drop, present and future. I like to have air available at a minimun every 10 feet. bring your air drop out of the top of the header and then down.This will help to keep water out.run a 6" drip leg off the bottom of each drop with a petcock to drain it with. Also put a drip leg as it comes out of the compressor. Remenber short hoses are easyier to manage than long ones. I have never heard someone say they have to many air drops or electric outlets. I would use a good quality filter regulator at the compressor. Parker is a real good brand name. Go to an industrial supply company to get one. I dont use a lubricator because I lube all my tools and there is no need for a lubericator unless you are running cylinders or motors or the like.You would have to get rid of the lube to use a spray gun any way.At the blast cabinet I would have anouther water filter and regulator. For painting I use a water filter with a quick disconnect that I hook inline a long with a little regulator on my gun. If you sit down and make a little sketch of what you want and need first it will help. Also ask some friends what they think about your plan. If you get a catologe from a blaster manufacturer( I have one from TIP TOOLS) they alot of times have digrams of what they recomend for thier products(don't reinvent the wheel)This is just my input, take it for what you want, Good Luck

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bill b va

01-02-2002 00:59:13




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 Re: Re: Time to run air lines - want to do it right! in reply to Werf, 01-01-2002 11:42:01  

most air tools are rated at MAX 120 LBS AIR PRESSURE so why would any one want a higher pressure air line system and then have to use a pressure regulators at each outlet ? in my opinion what ever the pressure at the compressor it should be reduced to a max 120 lbs for the normal air line and then if there is a special need for a higher pressure run a seperate line for it with a different type of connectors to prevent high pressure on the lower rated equipment . READ THE WARNING FOR MAX PRESSURE ON YOUR EQUIPMENT . there has been some baloney heads that have used oxygen cylinders for a air source .pressure can be in excess of 2000 lbs .if you stay under 120 lbs of pressure you can use regular copper lines and soldering .

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Cliff Neubauer

01-02-2002 07:30:53




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 Re: Re: Re: Time to run air lines - want to do it right! in reply to bill b va, 01-02-2002 00:59:13  
I run or compressor @145lbs because the regulators and filter for over 150psi cost so much more but I would rather run it higher. The difference in tool performance @145 over 120psi is huge, especially with bigger impact wrenches. I have never heard of premature failure because of 175psi on air tools.



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bill b va

01-01-2002 09:08:02




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  

i strongly recommend ridgid copper tubing for your air lines . i used be a maintenance mechanic in a factory that had both copper and iron . i have seen people on here say use black iron some say use galvonized i dont know why because the pipe rusts on the inside from the moisture and the outside dosen't matter in a dry location.the copper is much easier to work with and make changes if needed .as for plastic the only experience was with cpvc and it all started splitting after about a year and was replaced with copper .as for pvc i have heard it is ok for air lines .my house was built 9 years ago and all of the water lines are copper.i would never put plastic lines inside of walls .i think plastic is outstanding for sewer and other non pressure applications

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CJ

01-01-2002 08:21:44




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 Re: Time to run air lines - want to do it right! in reply to Bill Ford, 01-01-2002 07:53:15  
Yes you will want an air dryer to paint with. There are a number of types depending on your budget and how much painting you are going to do. Personally I use disposable dryer cartridges that go right on my gun. I just get a new one each time I pick up supplies and paint for a project. I also recommend looping your lines all the way around your shop so the air is never dead ended in a line. Adding drip legs with drains at each fitting helps remove water too. Another good tip is to use crosses instead of tees for your hose connection branches. Put the cross flat to the wall. Use the bottom branch for the dripleg and pull your air out the top of the line. Water droplets will tend to fall out of the airstream as the air makes the turn upward.

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T_Bone

01-01-2002 12:38:04




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 Re: Re: Time to run air lines - want to do it right! in reply to CJ, 01-01-2002 08:21:44  
Hi bill,

CJ is right on with installing air lines.

The most important is tapping the supply line from the "top" and sloping horzontial the lines 1/8" to the foot with 6" drip legs with ball valves. Hydraulic hose works well for a viberation insalater from the compressor to the main line

Type K copper is also used for refrigeration that has a typical working pressure of 500psi and works very well for air. alittle more expensive than black or galvanized pipe but worth it for a small system.

Electrical EMT clamps work well for keeping the line attached to the wall. A small piece of rubber tire tubing with 3M contact cement glued to the inside of the clamp.

T_Bone

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T_Bone...addition

01-01-2002 12:40:54




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 Re: Re: Re: Time to run air lines - want to do it right! in reply to T_Bone, 01-01-2002 12:38:04  
And use 15% silver solder for the joints.

If you need advice on silver soldering just let me know.

T_Bone



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