meaning of dimension 2

[Rakesh2560]

Greetings all,

I have a question related to dimensioning in boiler i was reviewing the drawings for tubes in economizer in our water tube boilers where is observed dimensioning in the following manner 44S X 115P= 5060 (16' 7 3/16") as distance between centre of tubes and bolt hole. my question is what doe s and P in this dimension stand for ?

Thanks everyone in advance for helping me.

 

[saplanti]

P stands for pitch of the tubes in the boiler application. I am not sure about s. When you talk about the bolt hole, I did not want to creates guesses. You need to clarify which bolt hole you are talking about.

 

[saplanti]

Perhaps attaching the drawing will give us better idea.

 

[saplanti]

s could be the distance between tube lines (in case they are parallel) in a tube bundle in the flow direction. Again it is a guess without seeing the drawing.

 

[saplanti]

But 44 mm does look short for the distance s in my previous post. You have not mentioned about economiser tube diameter to make this guess.

 

[Rakesh2560]

Please see attach pics for more clarity

 

[EdStainless]

8 spaces on 127mm pitch?
When and where is this drawing from?

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[saplanti]

Exactly.

 

[r6155]

The letters "S" = space and "P" = pitch were not necessary.
8 x 127 = 1016 is clear in the drawing.

This drawing is 50 years old or older

Regards

 

[Rakesh2560]

Thank you guys Edstainless, Saplanti and r6155 you are right the drawing is nearly 50 yrs old.