CARBON STEEL HEAT EXCHANGER / BOILER TUBES Standards/Grades Seamless: ASTM A 179 and A 209 Dimensions / Tolerances / Testing (according to Standard) Outside Diameter: 1/8" to 5" Wall Thickness: 0.035" to 0.5" Finishing - Certification 3.1 B according to EN 10 204 Special Features / Benefits - Applications Heat exchangers, condensers, boilers, superheaters Accessories -