Loss of Heat from Covered Steam Pipes 



34567 

 Actual outside diain. of pipe. 



10 



The useful lesson to be drawn from Figure 9 is that the loss 

 of heat from small pipes will always be large in proportion to 

 their surface, and it is also to be remembered that the proportion 

 of surface to weight of steam passed is much greater for small 

 pipes than for large. 



In conclusion it may be mentioned that the very important 

 quantities of durability and non- inflammability of a covering are 

 entirely outside of the scope of these notes. 



NOTE. The table at the end of the book makes the solution of practical problems by 

 the formulas of page 7 much simpler. It obviates the use of logarithms and much calcu- 

 lation for ordinary thicknesses of coverings on standard wrought iron steam pipes. 



