Tube


Size

The tubing sizes listed in the following tables are identified by their actual outside diameters “O.D.”. (plus or minus applicable tolerances)

When ordering, please specify both the O.D. and the wall thickness.


Example: for imperial sizes    1/2” O.D. x .035” WALL
                        for metric sizes        12 mm O.D. x 1 mm WALL















  TABLE 1


Specifications for Tubing with ASTM/ASME designations and titles of standard specifications.


ASTM/ASME TITLE

 

A213/SA213 Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super-Heater and Heat Exchanger Tubes
A249/SA249 Welded Austenitic Stainless Steel Boiler, Super-Heater, Heat Exchanger and Condenser Tubes
A269 Seamless and Welded Austenitic Stainless Steel Tubing for General Service


Barlows Formula used for theoretical bursting pressure.


P= 2(S X T)
     O.D.
P — bursting pressure—p.s.i. T — wall thickness — inches
O.D. — outside diameter — inches S — tensile strength





 

TYPICAL TENSILE STRENGTHS (S)
STAINLESS STEEL (300 SERIES) S=70000 to 75000 psi
CHROME MOLY (P1 TO P5) S=55000 psi
CHROME MOLY (BALANCE) S=60000 psi
ALLOY 20 S=80000 psi
904L S=70000 psi
DUPLEX S=90000 psi













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