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As far as I am aware you dont need to paste loctite but not read anything saying either but then never seen nothing on pack olives saying same I do it because always have
Discuss where to buy iron fittings for gas??? in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Every riser in the country is galvanised
Thats what i'd say too. And, only hemp on joints 3" and over which is now all welded anyway!
purge commercial pipes with air??
5-15% explosive ratio ?
isnt that dodgy?
purge commercial pipes with air??
5-15% explosive ratio ?
isnt that dodgy?
oooo hemp! no no no! Anything up to 1" with any pressure can be screwed or welded, Up to 2" and 500mbar can be screwed, anything over 2" or over 500mbar welded only.
I've just corrected Tamz! I'm going to that special corner of hell reserved for people that dare do that!
No really if you have a compressor (a real one).
I agree, I would prefer to use O2 free nitrogen but I don't always have a large enough bottle with me. But I always have the compressor!
Out of curiosity (I'm not commercial!) what are you pumping through with the compressor? Just air? I thought the whole point of commercial purging was that it had to be an inert gas because of the sheer volume of pipework and appliances - it's too big a risk if that amount of gas/air mixture hits the explosive ratio. Or have I totally misunderstood? I've not commercial gas training, this is just me figuring it out logically, by the way, so I am happy to be corrected!
No worries Mas, easiest way to learn is to ask.
It is just air but the difference is you're pumping it through at a greater volume and velocity minimising the risk of the explosive ratio being reached. My compressor is a 24ltr one and I usually leave it connected for about 5-10 minutes.
My purge stack is, or was (I have to make a new one, my old one was lent to a boy at work and is now in Scotland!), a 3.5m length of 1" pipe, welded at the bottom to an 8" blank flange with reinforcing. An equal tee 400mm up, a sample point (1"x1"x1/2" tee with union and lever valve) at 1.2m, and an elbow into a short stub cut off at 45deg to prevent rain ingress. It's in two pieces, joined in the middle with a 1" union.
Basically I connect my purge hose to it, compressor at the other end and let fly!
And if the meter does not have a purge point on it? What would you do
Drill a hole in the pipe close to the meter
Remove the meter
Remove the meter, I think we suggested this option to him but have did no have fittings to connect.
Suggested cutting into the 3 inch but he said if we get spark then that is problem. What ever we suggested, it was a problem
Drill a hole in the pipe close to the meter
Remove the meter
Remove the meter, I think we suggested this option to him but have did no have fittings to connect.
Suggested cutting into the 3 inch but he said if we get spark then that is problem. What ever we suggested, it was a problem
I wouldn't like to suggest the way I would drill the pipe then.
I read through some of this post. And "picking up a 28mm pipe" somewhere in the system to purge screams out a dangerous engineer to me
Surely even to a muggle it's obvious that you have to purge from the start and vent at the end. Not from one branch to another. There will be dead legs
Atleast the op didnt hurt anyone
Reply to where to buy iron fittings for gas??? in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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