Pressure testing 63mm gas pipe

[mutley racers]

eg of the calcs below

View attachment 35986

View attachment 35987

Wow no way, 257 minutes stabilisation and tt.

Thanks for sharing Shaun.

 

[ShaunCorbs]

Wow no way, 257 minutes stabilisation and tt.

Thanks for sharing Shaun.

each so around 10 hour test due to guage set

 

[mutley racers]

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

So a 3 bar test should be ok then hey

 

[ShaunCorbs]

Depends on spec of pipe

 

[mutley racers]

Reading treloar gas book commercial side. The tightness test is quite something

 

[ShaunCorbs]

Reading treloar gas book commercial side. The tightness test is quite something

Have a look at purging

 

[mutley racers]

Have a look at purging

Hehe. I kind of skipped that one. My bed time reading now is specification of gas sdr11 pe pipe

 

[mutley racers]

So reading the pipes testing procedure for gas, it says to reduce temperature effects the trench must be backfilled. That is surprising

 

[mutley racers]

I contacted another department today a d all they could tell me in that area it is all low pressure installations which will supply a MOP of 19 to 21mb. Does this help?

 

[ShaunCorbs]

Ask what the supply pressure is eg before reg

 

[mutley racers]

I see in this table it is below 100mb so MOP x 2.5

 

[Last Plumber]

You need to find out the Mains pressure before the Governor that controls your installation pressure. Cadent will tell you what the supply pressure is in that area. If you get that, I can look in IGE/UP/1 and tell you the pressure you need.

 

[mutley racers]

Sorry, the table above is not what I meant to post.

 

[ShaunCorbs]

Which ever is greater so mop might be 21mbar so 52mbar test

But mip could be 75 mbar so 82 mbar test

So mip is your testing pressure

 

[mutley racers]

I have talked to 4 people now and they don't know any figures just that the pressure in the mains gas pipe in the road is low pressure. Very frustrating

 

[ShaunCorbs]

I have talked to 4 people now and they don't know any figures just that the pressure in the mains gas pipe in the road is low pressure. Very frustrating

;D welcome to the world of trying to get info out of the networks

 

[mutley racers]

Must be a nightmare.

To be honest, Cadent would of had it but it is not there area. It is SGN.

I have found this info though...

Going from that info it is what you have suggested and 75mb for low

 

[mutley racers]

This is the gas meter in the unit next to the shop.

 

[ShaunCorbs]

G/u65 meter defo commercial

 

[mutley racers]

G/u65 meter defo commercial

No MOP or MIP stated on it though

 

[ShaunCorbs]

No MOP or MIP stated on it though

Won't be should be a gas info board around it eg yellow board

 

[Scott_D]

No MOP or MIP stated on it though

No label or data tag near by?

 

[mutley racers]

One of these in the background

 

[mutley racers]

One of these yellow tags

 

[ShaunCorbs]

Board left of solenoid

 

[mutley racers]

Bingo.........

 

[ShaunCorbs]

There you go mip 75 mbar

Mop 23

So test would be 82.3 so 83mbar so you could test the mdpe at 100 mbar

 

[mutley racers]

There you go mip 75 mbar

Mop 23

So test would be 82.3 so 83mbar so you could test the mdpe at 100 mbar

Thanks for the calculations. As I don't have a gauge that does 100mb, I could do this as you suggested in the 1st place to 1 bar as it is only a soundness test after all. But, as you say it is commercial so should I avoid.

Well if one thing that comes out of this I have learnt a bit about cost of fittings for this size pipe and strength testing.

Thank you all

 

[ShaunCorbs]

Upto you as it's not connected you could say your only testing the pipe for defective not carrying gas

 

[mutley racers]

Upto you as it's not connected you could say your only testing the pipe for defective not carrying gas

I was thinking so much.

So what size manometer do you have for these tests any way

 

[ShaunCorbs]

Don't have one

Got a dial gauge eg pressure and an anton 140

 

[mutley racers]

I wonder what pressure my kane455 goes upto

 

[Scott_D]

I wonder what pressure my kane455 goes upto

Think mine is 75mb

 

[ShaunCorbs]

Bes do a 100 mbar gauge

 

[mutley racers]

Bes do a 100 mbar gauge

View attachment 35995

Thank you sir. That is who I ordered my 63mm fittings from last night and they were supposed to get here before 10.30 today. They just arrived now

 

[quality]

Ive not read all the post but the below will have a connector to suit
Leak Testing fittings

 

[mutley racers]

Ive not read all the post but the below will have a connector to suit
Leak Testing fittings

Interesting tools. Don't think I could find one for the diameter of pipe though

 

[ShaunCorbs]

Interesting tools. Don't think I could find one for the diameter of pipe though

Waste test plug depending on internal bore

 

[mutley racers]

Bes do a 100 mbar gauge

View attachment 35995

Not cheap hey at £47

 

[quality]

Not cheap hey at £47

try these they will be cheaper
Modus Gauges Limited

 

[mutley racers]

try these they will be cheaper
Modus Gauges Limited

Works out around 3 quid more due to carriage. Thanks though

 

[quality]

worth a try

 

[mutley racers]

So went to pressure test this job but the pipe was not installed to regs. They had run yellow mdpe into the building which if I remember correctly is a no.

I do know the gas board do this though when replacing the mains to the meter inside the house with mdpe by pushing it up the old pipe.

 

[Scott_D]

So went to pressure test this job but the pipe was not installed to regs. They had run yellow mdpe into the building which if I remember correctly is a no.

I do know the gas board do this though when replacing the mains to the meter inside the house with mdpe by pushing it up the old pipe.

Any pics?

 

[ShaunCorbs]

into the building is ok under the building no no

 

[mutley racers]

Any pics?

Not the most revealing to be honest. Not much to see.

The pipe goes under the building just to the left