Pressure testing 63mm gas pipe

[mutley racers]

I have been asked to pressure test and cap of 12metres of 63mm yellow gas pipe that is in a trench. Nothing is connected to either end.

Pressure testing to 10 bar should be fine hey?

 

[Last Plumber]

I have been asked to pressure test and cap of 12metres of 63mm yellow gas pipe that is in a trench. Nothing is connected to either end.

Pressure testing to 10 bar should be fine hey?

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[mutley racers]

It will be buried yes. This is going to be used at a later date so just checking this length is sound and then capping off.

10 bar is what I test all pipework to on new systems

 

[ShaunCorbs]

Commercial mut also I would follow fitting instructions/ pipe instructions will state a pressure prob

 

[Scott_D]

Is it rated to 10 bar?
1.5 times MIP? If I remember correctly

 

[mutley racers]

Is it rated to 10 bar?
1.5 times MIP? If I remember correctly

Just about to follow shaun' S advice and look up MI'S. Never had to work on mdpe pipe for gas before.

Fittings for this are £40 plus vat . Costly

 

[Scott_D]

Just about to follow shaun' S advice and look up MI'S. Never had to work on mdpe pipe for gas before.

Fittings for this are £40 plus vat . Costly

Fusion weld?
You will need to hire the kit as well

 

[mutley racers]

Fusion weld?
You will need to hire the kit as well

I am only going to test and cap off so will use philmac fittings

 

[Last Plumber]

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[Last Plumber]

Edit

 

[mutley racers]

Last plumber, your post has disappeared it seems?

I have found this info on the pipe but no pressure testing method. This is a new carcass with no joins and nothing attached to either end.

 

[ShaunCorbs]

Max pressure so keep under them and you will be fine

Test at like a bar

 

[mutley racers]

Max pressure so keep under them and you will be fine

Test at like a bar

This is the max gas pressure going into the pipe though isn't it? So I would have thought I would need to test it to more than the 5.5 bar.

 

[ShaunCorbs]

This is the max gas pressure going into the pipe though isn't it? So I would have thought I would need to test it to more than the 5.5 bar.

No that's the max pressure the pipe is rated to if you go above it could blow the pipe / split

What's your gas working pressure?

 

[Last Plumber]

Last plumber, your post has disappeared it seems?

I have found this info on the pipe but no pressure testing method. This is a new carcass with no joins and nothing attached to either end.

View attachment 35973

Do you know the MIP and MOP the pipe will be subject to once commissioned?
There are various pressures that PE should be tested to dependant on those pressures. If you can tell me those, I will endeavour to look up the pressure it requires testing at for you if that will help you. They are in table 1 of IGE/UP/1.

 

[mutley racers]

Hi, I actually know very little at this stage. I have asked the guy what the pipe is going to be used for and he will let me know today.

 

[mutley racers]

And here was me thinking I could just test this at a couple bar pressure and be done.

A bit more complicated than expected.

 

[Last Plumber]

And here was me thinking I could just test this at a couple bar pressure and be done.

A bit more complicated than expected.

Maximum Incidental Pressure (MIP)
Maximum Operating Pressure (MOP)

 

[mutley racers]

Maximum Incidental Pressure (MIP)
Maximum Operating Pressure (MOP)

Will I get those from whoever suggested putting in a 63mm pipe?

 

[ShaunCorbs]

Will I get those from whoever suggested putting in a 63mm pipe?

Have a look at the meter should be labelled on the info board

 

[mutley racers]

No meter, there. Not even a building as of yet. Just a 63mm gas pipe in a trench

 

[ShaunCorbs]

No meter, there. Not even a building as of yet. Just a 63mm gas pipe in a trench

Have to talk to the networks then

If the test is only to make sure there's no defects in the pipe 1 bar air should be good enough then later on you can do all your calcs in regards to strength and tt

 

[mutley racers]

Have to talk to the networks then

If the test is only to make sure there's no defects in the pipe 1 bar air should be good enough then later on you can do all your calcs in regards to strength and tt

It is just checking for defects before it gets buried

 

[mutley racers]

So no meter there yet and no carcass. It will be a supply from meter to 3 radiant heaters in what will be a smiths toy shop

 

[mutley racers]

Anyone know if the philmac 32mm gas fitting will take a 32mm copper pipe

 

[ShaunCorbs]

35mm pipe so no

 

[mutley racers]

35mm pipe so no

Any idea on how to go from mdpe gas to copper. Cannot find any philmac which mention this. Seems like quite tricky to get connection on this pipe to pressure test it.

 

[ShaunCorbs]

32mm to 11/4 or 11/2 female iron

11/4 or 11/2 to 35mm comp male iron

 

[ShaunCorbs]

Are you commercially reg mut ?

 

[mutley racers]

Are you commercially reg mut ?

No am not. I thought it would be ok to just test this pipe doesn't have any leaks in before it gets buried. I am not doing anything else on this job.

 

[ShaunCorbs]

i would say you need to be qualified then

 

[Last Plumber]

Will I get those from whoever suggested putting in a 63mm pipe?

Gas Transporter will know MIP.
The Gas installer/Gas installation designer will Know MOP but Gas transporter will know it too.

 

[Scott_D]

If you are issueint some sort or test certificate I think you should have commercial
If you are just testing for peace of mind, maybe not, who fitted the pipe? Is it to the correct depth? Will it be correctly buried etc?

 

[mutley racers]

If you are issueint some sort or test certificate I think you should have commercial
If you are just testing for peace of mind, maybe not, who fitted the pipe? Is it to the correct depth? Will it be correctly buried etc?

No no test certificate needed. Will check depths etc when there. The pipe is sleeved in yellow corrugated pipe.

 

[Last Plumber]

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