Classification PED for fuel oil 1

[rocio74]

Hi all,

I am preparing a list of lines classification according to PED/97/23/EC and I have a problem with the fuel oil.

I do not know the composition of the fuel. The data that I have are:

Pdesign(max) = 18 bar(a)
Tdesign(max) = 80ºC
piping diameter = 4"

I know that the fuel belongs to group 1 because it is dangerous, toxic, etc., but I do not know if it is class A or B. According to PED, for the liquids which vapor pressure is equal or less than 1,5 bar(a) to the maximum temperature, the class is B; on the contrary (vapor pressure to the maximum temperature is bigger than 1,5 bar(a)) the class is A.

The question is, what is the classification for this fuel? 1A or 1B?



Thank you very much,
Rocio Rodriguez

 

[europipe]

What do You mean by class A or B?
You only have to know whether the fuel is a gas or a liquid
at .5 barg.(1.5 bara)
When it is a gas your cat. is II.
When it's a liquid it's SEP.

Greetings

 

[rocio74]

Hi again,

I know that if the fuel is a gas, the category is II, but, what is happen when the fuel is a liquid? According to PED, exist a division between the liquids. If the liquids have a vapor pressure bigger than 1,5 bara (Pv>1,5) they belongs to a different "group" that if they have a vapor pressure less or equal to 1,5 bara (Pv>=1,5) (I meat that, with A or B, being first condition A(Pv>1,5) and second condition B(Pv>=1,5)). So, when I analized the fuel line with 1A, the category is II and when I do it with 1B, the category is exempt, situations very different.

The problem is that I don´t know what is the vapor pressure for the fuel at the maximum temperature because I don´t know the composition of this fuel. The client doesn´t want to us the composition of the fuel. The project is a "biomass plant" and the fuel line will be with steam traced under a client requirement and in order to avoid the solidification of the fuel and keep the fluidity.

The operation conditions for this fuel are:

Pop = 7 bara
T op = 50ºC


Thank you very much for any help,

Rocio

 

[BigInch]

If you don't know the composition of the fuel, how can you determine if its not bionuclear fuel?

Sign a confidentiality agreement and get on with it.

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[europipe]

When Your vapor press. is higher then .5 barg at 80 deg C.
your liquid fueloil is considered as a ges.
Most fuel oils are liquid at that temp. and press.,
but maybe You have a very light fuel oil,
than it can be a gas at .5barg.
As Big" sais you must know the exact comp. of the fuel oil.

Greetings

 

[europipe]

btw, here 's anice download: PED cat. selection

http://www.stoomwezen.nl/html/downloads.html

Greetings

 

[BigInch]

If its a typical biofuel without unusual additives, its a low vapor pressure "diesel" of some kind. Probably around or less than 1 psia.

If you have this much trouble getting the product properties, you're going to lose money on that job one way or another. I'd say you need a cooperative client a lot more than you need the vapor pressure. How much time have you wasted on this issue so far?

**********************
"Pumping accounts for 20% of the world’s energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[rocio74]

Thank you very much for the link "PED cat.selection", I am using it to check my data. Only two questions more regarding to the program:

1. Pressure: is the pressure PS in bar(g) or in bar(a)? I think is bar(g). Please, confirm

2. Diameter: if I have a pipe of 8", the data that I have to introduce in the prorgram, is the DN 200 mm or 219 mm (outside diameter)? I think is 200 mm, please confirm.


Thank you very much again,
Rocio

 

[europipe]

Pressure you have to fill in is barg.
Round off the inch sizes i.e. 4"=dn100, 3"=dn80, 8"=dn200 etc.

Greetings