Expert help needed regarding ccn1 tolerances

[plumbdoctor]

Hi I am aware we are allowed up to u16 35mm pipe on out qualifications im just being lazy here as I'm out and not got the time or brain power at the moment to work it out, been asked to install a 45kw boiler off a u16 gas meter with 50m gas pipe run ? I'm sure this is commercial scope ? Help would be great.
As 28mm at 30m is 4.8 m3hr

Thanks

 

[newcastle phill]

Just done a quick calc
Youd need 35mm pipe - the pipe alone IV is out of scope of /1b

Meter + pipe .067

 

[plumbdoctor]

That's what I thought it's a long run be well over the drop, I don't know much about commercial so won't be doing the job is it something to do with purge and testing that makes it commercial as well ?

 

[newcastle phill]

Shame it wasnt a bit closer with a conveniently placed aecv