pipe pvc or not - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Garage - Tools
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 03-01-2012, 07:39 AM
Registered User
 
Join Date: Mar 2012
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
pipe pvc or not

can a person use pvc sch 40/80 will the joints hold?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-01-2012, 07:50 AM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 57
Posts: 5,244
Wiki Edits: 26

Thanks: 7
Thanked 120 Times in 105 Posts
what do you want to use it for. If you are talking air, dont do it. It is dangerous
__________________
Artificial Intelligence is no match for Natural Stupidity



Chet
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-01-2012, 07:55 AM
johnnyg's Avatar
hold my beer and watch this!
 
Last photo:
Join Date: Mar 2010
Location: Harrison Twp. Michigan
Age: 50
Posts: 124
Wiki Edits: 0

Thanks: 34
Thanked 17 Times in 15 Posts
PVC is made for low or no pressure water, like under your sink to drain the water.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-01-2012, 04:47 PM
Old Fool's Avatar
Registered User
 
Last photo:
Join Date: Jan 2008
Location: spokane,wa.
Posts: 1,347
Wiki Edits: 0

Thanks: 8
Thanked 40 Times in 34 Posts
PVC sch 40 pipe is definately rated for pressure
http://www.engineeringtoolbox.com/pv...res-d_796.html

PVC shc 40 pipe for the most part is not rated for compressed air at any pressure.

The oils in compressed air are known to degrade the pvc material and make it brittle.

A pipe with 100 psi of compressed air in it is a potential bomb. If the material is adequate, nothing happens. If it cannot contain the pressure explosive decompression happens sending sharp plastic shards all over heck.

A pipe filled with water to a pressure of 100 psi is not a potential bomb. If the material is adequate , nothing happens, If it cannot contain the pressure, it splits and water sprays out as a mist or a quickly depleted stream. No explosive decompression will happen.

Many do it, they take the risk. For me it is not worth saving a hundred dollars.
40 years in the trades to see to many failures due to improper installations to think otherwise.

I replaced a large steam tube bundle at a major hotel in down town Seattle.
The city of Seattle provides the steam to the building , at which point the building owner operates the system.
This system had 4 relief valves on it, which if all were functional they would have been providing adequate protection.
BUT someone had used wire tyes to tie down the relief arm on one of the reliefs. When asked about it the building mtce people said it was done because it leaked and made the room to hot.
That was only half of it, when removed - a second relief valve was found to have had the temp probe sawn off of it so it would fit into a pipe.
50% of the safety function of that system was disabled and had ran for who only knows how long without a news incident.
The main steam valves were shut off upstream of the reliefs until the full system repairs and corrections were completed.
No way we were going to work in that room, or that building under those conditions.

Same thing applies to the air system at my shop. No PVC for me.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-02-2012, 05:56 AM
johnnyg's Avatar
hold my beer and watch this!
 
Last photo:
Join Date: Mar 2010
Location: Harrison Twp. Michigan
Age: 50
Posts: 124
Wiki Edits: 0

Thanks: 34
Thanked 17 Times in 15 Posts
I wouldn't use it for steam either it would melt.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-02-2012, 07:52 AM
Old Fool's Avatar
Registered User
 
Last photo:
Join Date: Jan 2008
Location: spokane,wa.
Posts: 1,347
Wiki Edits: 0

Thanks: 8
Thanked 40 Times in 34 Posts
Quote:
Originally Posted by johnnyg
I wouldn't use it for steam either it would melt.
Now that's funny
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-02-2012, 07:57 AM
MARTINSR's Avatar
Brian Martin,Freelance adviser
 
Last photo:
Join Date: Jun 2004
Location: San francisco bay area
Age: 55
Posts: 13,231
Wiki Edits: 0

Thanks: 1,353
Thanked 1,191 Times in 1,050 Posts
Quote:
Originally Posted by panky99
can a person use pvc sch 40/80 will the joints hold?
Go to your local hardware store and price out galvanized pipe, it doesn't cost that much more and it is the right way to go.

Brian
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-05-2012, 05:55 AM
RPM's Avatar
RPM RPM is offline
World Class ASE tech
 
Last photo:
Join Date: Nov 2004
Location: Hills of TN
Age: 64
Posts: 704
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have pvc in my shop for over 12 years now. No problems at all. It runs 120 PSI everyday.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 03-05-2012, 06:20 AM
Registered User
 
Last photo:
Join Date: Nov 2010
Location: Seasonally Frozen Wastelands
Posts: 19
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by RPM
I have pvc in my shop for over 12 years now. No problems at all. It runs 120 PSI everyday.
And if it explodes, the PVC shrapnel won't show up on your x-rays.

You have a shop fire that melts a little hole the pipe, you've just created a blowtorch.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 03-05-2012, 07:21 AM
johnnyg's Avatar
hold my beer and watch this!
 
Last photo:
Join Date: Mar 2010
Location: Harrison Twp. Michigan
Age: 50
Posts: 124
Wiki Edits: 0

Thanks: 34
Thanked 17 Times in 15 Posts
Quote:
Originally Posted by Old Fool
Now that's funny
I thought you would get a kick out of that!!
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 03-05-2012, 07:44 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,912
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
Quote:
Originally Posted by RPM
I have pvc in my shop for over 12 years now. No problems at all. It runs 120 PSI everyday.

And you think that makes it safe? The longer it's up the more likely you are to have a serious accident, 12 years without an incident only means you were lucky not safe and the older it gets the more likely it is to rupture. Do you have any idea how much damage a ruptured PVC pipe carrying 120 PSI of air can do? These things don't just spring a small leak or simply break they usually rupture along several feet of length and throw razor sharp shards that will fly in all directions and can be lethal 25 to 30 ft away or even farther, like Schurkey pointed out if you are hit by these pieces of shrapnel embedded pieces will not show on an X-ray. There have been many serious accidents resulting from using PVC for airline and because some people still insist on using it there will quite likely be more accident victims, don't kid yourself you could be one of them. If you want to continue using PVC in spite of the WELL KNOWN hazards that's your business but please don't come here and tell someone else it's safe because it most certainly is not!
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 03-05-2012, 11:45 PM
dinger's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Health and safety in the shop or garage
Last journal entry: 36 Ford painting
Last photo:
Join Date: Jan 2002
Location: Visalia, Ca.
Age: 61
Posts: 2,711
Wiki Edits: 1

Thanks: 102
Thanked 110 Times in 76 Posts
Oldred has it right on. DO NOT USE PVC PIPE FOR AIR! I have personally seen 3 failures on the same location, they were lucky no one got hurt, especially me, cuz they were told and then if I were hurt, that business would have my name on the business license as owner. Stupid! I finally threatened to have the county come out and inspect it, the contractor then did the right thing and changed it out to cast.
__________________
"When I was younger, I could remember anything, whether it had happened or not." - Mark Twain
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 03-06-2012, 01:58 AM
Vegaguy's Avatar
Registered User
 
Last photo:
Join Date: Jan 2008
Location: Tacoma Wa
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have seen and heard pvc fail in use as air lines and this was in a GM dealership. It was temporary due to a fire in the main shop but it failed at 110 psi. It sounded like a bomb and sent shrapnel everywhere and luckily no one was injured from it. I will never use pvc for air lines. Use black iron pipe.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 03-06-2012, 07:05 AM
Old Fool's Avatar
Registered User
 
Last photo:
Join Date: Jan 2008
Location: spokane,wa.
Posts: 1,347
Wiki Edits: 0

Thanks: 8
Thanked 40 Times in 34 Posts
last 2 posts mention "cast" and "black iron", do not think this means you can use black cast iron. It is drain pipe.

Black iron pipe is steel, not cast.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 03-06-2012, 07:56 AM
MARTINSR's Avatar
Brian Martin,Freelance adviser
 
Last photo:
Join Date: Jun 2004
Location: San francisco bay area
Age: 55
Posts: 13,231
Wiki Edits: 0

Thanks: 1,353
Thanked 1,191 Times in 1,050 Posts
Yes and you want galvanized not black. Black is for gas not water, unfortunately compressed air is full of water so it shouldn't be used.

Brian
Reply With Quote Quick reply to this message

Recent Garage - Tools posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
1/2 pipe to male 1/4 pipe thread for shop Mach1460 Garage - Tools 8 09-27-2011 09:38 AM
Flexible Pipe from Compressor to Solid Pipe? cab Garage - Tools 24 12-03-2007 07:55 PM
x-pipe 79chevy4x4 Engine 1 11-21-2006 12:52 PM
what is beater H pipe or X pipe rale Engine 2 05-17-2006 06:38 AM
x-pipe, h-pipe and other exhaust questions smlblcks10 Engine 7 11-25-2003 06:05 AM


All times are GMT -6. The time now is 09:22 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.