Pressure testing 63mm gas pipe

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mutley racers

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

Screenshot_20181217-125604.png
 
Max pressure so keep under them and you will be fine

Test at like a bar
 
mutley racers said:
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.
Click to expand...

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?
 
mutley racers said:
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
Click to expand...

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 said:
No meter, there. Not even a building as of yet. Just a 63mm gas pipe in a trench
Click to expand...

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
 
35mm pipe so no
 
32mm to 11/4 or 11/2 female iron

11/4 or 11/2 to 35mm comp male iron
 
Are you commercially reg mut ?
 
i would say you need to be qualified then
 
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?
 
scott_d said:
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?
Click to expand...


No no test certificate needed. Will check depths etc when there. The pipe is sleeved in yellow corrugated pipe.
 
So this is what I need to test and cap this pipe. Quite a lot of fittings.

1 x philmac 63mm end cap
1 x primofit adaptor 63mm compression to 2 inch bsp Female
2 inch x 1 inch brass reducer
1 inch male iron to 22mm compression and some copper tube. Test, then cap the test point.
 
mutley racers said:
So this is what I need to test and cap this pipe. Quite a lot of fittings.

1 x philmac 63mm end cap
1 x primofit adaptor 63mm compression to 2 inch bsp Female
2 inch x 1 inch brass reducer
1 inch male iron to 22mm compression and some copper tube. Test, then cap the test point.
Click to expand...
That’s why commercial guys charge loads
I know Shaun and Last plumber use £50 notes as bog roll.
 
I am charging 2 days to just go and test this plus the parts. It is down in Margate so should be half a day there, back and testing.

Trouble is finding places that stock these fittings. BES do but then I need to wait for a delivery and was hoping to get down there tomorrow.

It has taken me 2 days to research fittings due to work, wife and 3 kids at home all being rather demanding.

I need to take more dump breaks at home I think!
 
Bss will have stock / they should
 
Try sbs smith brothers there London area
 
scott_d said:
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?
Click to expand...

ShaunCorbs said:
i would say you need to be qualified then
Click to expand...

Turns out A certificate is required for the soundness of this length of pipe.

Still would have thought I could test this as it is just an empty carcass?
 
mutley racers said:
I contacted the network and they said I need to do an online form which can take 2-3 weeks to come back as the pressures going to individual properties is different. I am thinking this is not correct hey.
Click to expand...

Yep most places I work are around the 50-75 mbar mop but mip can vary anywhere from 75mbar to 1 bar depending on what's around
 
The STP is determined by the MOP or MIP. It has little to do with pipe sizes or volumes. On a std low pressure supply the MIP will be 75mb. STP will be 1.1 x MIP which in this case is 82.5mb. Test duration (for any size pipe) is 5 minutes stabilisation + 5 minutes test. 20% pressure loss is allowable with a pneumatic test and 5% if hydrostatic testing.

On bigger systems at higher pressures (again any size pipe), if the MOP is say 2 bar the STP would be 2bar x 1.5 = 3bar tested for 10 minutes stabilisation plus 5 minute test with the same drops allowed.
Taking it to the extreme with a MOP of 16bar the STP is 16 x 1.5 = 24bar. Hydrostatic test only, stabilise for 30 mins test for 30 mins with a 5% allowable drop.

(IGE/UP1)
 
mutley racers said:
The STP is determined by the MOP or MIP. It has little to do with pipe sizes or volumes. On a std low pressure supply the MIP will be 75mb. STP will be 1.1 x MIP which in this case is 82.5mb. Test duration (for any size pipe) is 5 minutes stabilisation + 5 minutes test. 20% pressure loss is allowable with a pneumatic test and 5% if hydrostatic testing.

On bigger systems at higher pressures (again any size pipe), if the MOP is say 2 bar the STP would be 2bar x 1.5 = 3bar tested for 10 minutes stabilisation plus 5 minute test with the same drops allowed.
Taking it to the extreme with a MOP of 16bar the STP is 16 x 1.5 = 24bar. Hydrostatic test only, stabilise for 30 mins test for 30 mins with a 5% allowable drop.

(IGE/UP1)
Click to expand...

I am guessing as the pipe is only able to carry 5.5bar the pressure test is not going to be 24bar?
 
mutley racers said:
I am guessing as the pipe is only able to carry 5.5bar the pressure test is not going to be 24bar?
Click to expand...

thats your max gas pressure not the max pressure the pipe can take i would be surprised if you over 75mbar op
 
eg of the calcs below

strength_cert.jpg


tightness_cert.jpg
 
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