Earth bond clamp for oil pipe

[dnjr]

Dear All
Got a board change to do where there is an incoming oil pipe.
Plastic tank with PVC covered copper pipe most of the way. Comes inside and its just copper coming up through the floor. Did an IR test and got 0.00 so it needs bonding ( as I understand it its got to be under 0.02 to not need bonding)
Problem is the pipe is only about 8 or 9 mm dia. and i cant find a small enough clamp.
Someone suggested either a P clip or strap banding but they dont seem very professional. what are people using please
cheers
dnjr

 

[davesparks]

I usually manage to fit a standard earth clamp to an oil pipe.

I did that once on a 10mm PVC coated soft copper oil pipe and crushed it, apparently the plumber thought this was a bad thing, but I just told him it was revenge.

 

[suffolkspark]

I usually manage to fit a standard earth clamp to an oil pipe.

I've only been in the trade 14 years which know isn't as many as some on here, but I've never had an issue doing this either? I've always used Tenby ones I know some cheaper ones are a different shape so perhaps don't grip smaller things?

 

[sparkdog]

MICC Pyro bare copper P clip as mentioned earlier.

 

[dnjr]

thanks all. Will try p clips

 

[dnjr]

Wholesaler came up with this
It's an earth bond link made by Tamlex for trunking bent round. Giving it a go

 

[suffolkspark]

I still di t get why an earth clamp wont fit? Take a pic im intrigued, ps dont forget to affix bonding label to your clamp

 

[dnjr]

I still di t get why an earth clamp wont fit? Take a pic im intrigued, ps dont forget to affix bonding label to your clamp

Hi Suffolk
Standard clamps I have seen either have a sort of box section bit in the clamp which would wobble about on top of the pipe or have a 'U' shaped but with the clamp which is too big and straddles the pipe and band can't go tight enough. Honest. I've tried. ...

 

[telectrix]

wind a bit of bare 6.0mm round the pipe. solder in place. sleeve the tail after .

 

[dnjr]

wind a bit of bare 6.0mm round the pipe. solder in place. sleeve the tail after .

Now that is a bloody good idea
Hats off to you

 

[Wilko]

Some care required if you are planning to solder a heating oil supply line. From memory, soldering needs about 200C and the auto ignition point of heating oil is about that too. Just saying ...

 

[telectrix]

1.do it when there's no oil in the pipe

2. clamp heat sinks on pipe to prevent the oil overheating. it needs to vaporise to ignite.

 

[westward10]

The oil will not ignite unless it reaches temperature where it vaporizes allowing it to mix with oxygen, liquids do not burn it will however act as a heat sink removing the temperature from the pipe.

 

[Wilko]

The oil will not ignite unless it reaches temperature where it vaporizes allowing it to mix with oxygen, liquids do not burn it will however act as a heat sink removing the temperature from the pipe.

That's right, these fuels won't burn without air. It's my understanding the vapour point of heating oil is significantly below the melting point of solder. Again, just saying ...

 

[telectrix]

maybe an experiment.... a whole new concept of the bang test.

 

[westward10]

That's right, these fuels won't burn without air. It's my understanding the vapour point of heating oil is significantly below the melting point of solder. Again, just saying ...

The flash point of heating oil depending on the type will be approximately half 200°C.