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Posted by Tom Stanton on March 08, 2002 at 09:29:52:
In Reply to: Corrugated Furnaces vs. Straight Furnaces with Bowling Hoops posted by Fahim I Siddiqui on March 08, 2002 at 03:37:26:
Many high pressure boilers (greater than 15 psi steam)utilized a corrugated constructed furnace. This type of furnace gives additional strength and heating surface. I am not sure what you mean by bowling hoops, however, a plain furnace (smooth) is the common construction for boilers designed for 15 psi. I wouldn't worry to much about which is easier to repair/replace, although the plain furnace is easier (cheaper).