Inquiry (采购产品): fire tube burner tubes Gentlemen, What is the most commonly used tube for fire tube boilers.Current size 2 1/2" .125 mwt but may have some water chemistry problems. Do you have any suggestions for fire tube type. Currently only rolling tubes in. Thank you **** Hidden Message ***** Keithe Hofeld 55113 Company: environmental services E-mail: khofeld@eslmandan.com **** Hidden Message ***** khofeld@eslmandan.com