ASTM A249  Standard Specification for Welded Austenitc Steel Boiler, Superheater, Heat Exhchanger, Condensor Tubes

 

Size:  

OD:  1/8 in (3.2mm) to 5 in (127mm)

WT:   0.015 to 0.320 in  (0.4 to 8.1mm)

 

Grade:

TP304H, TP309H, TP310H, TP316H, TP312H, TP347H and TP348H.

TP304, TP309S, TP310S, TP310Cb, TP316, TP321, TP347, TP348

For high-temperature service such as for superheaters and reheters

 

Application:

Boiler, Superheater, Heat Exhchanger, Condensor Tubes

Austenitic stainless steel, temperature service applications, high temperature applications

 

Manufacture:

The tubes are made from flat-rolled steel by an automatic welding process with no addition of filler metel.

Subsequent to welding and prior to final heat treatment, the tubes are cold worked on weld and base metal or in weld metal

 

Test and inspection:

Tension test

Flattening test

Flange test

Reverse-Bend test

Hardness test

Hydrostatic or Nondestructive Electric Test

Grain size