Is there a maximum 15 mm pipe length from the 22 mm ring?

[llChopperll]

Thanks slippyr4

Two separate runs from four separate 'T's was always my intention and thank you for the clarification. Would there be any benefit of running the horizontal portion of the extension in 22mm (9m) and the drops to the rad in 15mm (2.4m)?

 

[slippyr4]

Yes, that would be a really good thing to do.

 

[Dan Robinson]

That's why there are "rules of thumb" w

Helps to get the rules of thumb right though.

 

[D_Hailsham]

15mm tube will carry a 6kw load @ 10c dt. (0.14 x 4.2 x 10c = 5.8 kW)
15 mm tube @ 20 dt (0.14 x 4.2 x 20c = 11.6 kW)
Tony , had you of recieved the correct training then you wouldn't be making these school boy errors.

I understand the formula, but where do you get the flow rate of 0.14 litres/sec from?

 

[Dan Robinson]

Its not l/s.

 

[Roger928]

What is it?

 

[Steelmasons]

Your homework for tonight........

 

[Dan Robinson]

I'll give you a clue - there is a "/" in the answer .

 

[ianniann]

kg/s ?

 

[D_Hailsham]

Its not l/s.

kg/sec if you are being pedantic.

 

[Steelmasons]

42mm @ 10dt 1 m/s velocity....
1 x 4.2 x 10 = 42kw...

 

[Dan Robinson]

Why do I work at 1.2 and get 50?

 

[Steelmasons]

1.2 litres Dan although I just rounded it up as an example.

 

[Dan Robinson]

Think my SHC is a bit more precise too .

 

[Steelmasons]

Think my SHC is a bit more precise too .

Around 4.187.