| Specification |
Allowable
Outside Diameter Variations in mm |
Allowable
Wall Thickness Variations |
Exact
Length Tolerance in mm |
Testing |
ASTM-A213
Seamless Boiler.
Superheater and
Heat Exchanger
Tubes |
Nominal
Diameter |
Over |
Under |
%Over
|
%Under |
%Over
|
%Under |
|
| Under
25.4 |
.1016 |
.1016 |
+20 |
-0 |
3.175 |
0 |
Tension
Test |
| 24.4-38.1incl |
.1524 |
.1524 |
+22 |
-0 |
3.175 |
0 |
Flattering
Test |
| 38.1-50.8
excl |
.2032 |
.2032 |
+22 |
-0 |
3.176 |
0 |
Flare
Test |
| 50.8-63.5
excl |
.254 |
.254 |
+22 |
-0 |
4.76 |
0 |
Hardness
Test |
| 63.5-76.2
excl |
.3048 |
.3048 |
+22 |
-0 |
4.76 |
0 |
100%
Hydrostatic Test |
| 76.2-101.6incl |
.381 |
.381 |
+22 |
-0 |
4.76 |
0 |
Refer
to ASTM A-450 |
ASTM-A249Welded BoilerSuperheater, HeatExchanger and Condenser Tubes |
Under
25.4 |
.1016 |
.1016 |
+10 |
-10 |
3.175 |
0 |
Tension
Test |
| 25.4-38.1incl |
.1524 |
.1524 |
+10 |
-10 |
3.175 |
0 |
Flattering
Test |
| 38.1-50.8
excl |
.2032 |
.2032 |
+10 |
-10 |
3.176 |
0 |
Flare
Test |
| 50.8-63.5
excl |
.254 |
.254 |
+10 |
-10 |
4.76 |
0 |
Reverse
Bend Test |
| 63.5-76.2
excl |
.3048 |
.3048 |
+10 |
-10 |
4.76 |
0 |
Hardness
Test |
| 76.2-101.6incl |
.381 |
.381 |
+10 |
-10 |
4.76 |
0 |
100%
Hydrostatic Test |
| MinimumWall
tubes+18%-0 availableOn request |
|
|
*Reverse
flattening TestRefer to ASTM-A450 |
|
|
*Wherever
applicable |
| ASTM-A269Seamless
& WeldedTubing for GeneralService |
Upto
12.7 |
.13 |
.13 |
+15 |
-15 |
3.2 |
0 |
Flare
Test |
| U12.7-38.1
excl |
.13 |
.13 |
+10 |
-10 |
3.2 |
0 |
Flange
Test (Welded Only) |
| 38.1-88.9
excl |
.25 |
.25 |
+10 |
-10 |
4.8 |
0 |
Hardness
Test |
| 88.9-139.7
excl |
.38 |
.38 |
+10 |
-10 |
4.8 |
0 |
Reverse
Flattening Test(Welded only) |
| 139.7-203.2
excl |
.76 |
.76 |
+10 |
-10 |
4.8 |
0 |
100%
Hydrostatic TestRefer to ASTA269 |
| ASTM-A270Seamless
& WeldedSanitary Tubing |
25.4 |
.05 |
.20 |
+12.5 |
-12.5 |
3.2 |
0 |
Reverse
Flattening Test |
| 38.1 |
.05 |
.20 |
+12.5 |
-12.5 |
3.2 |
0 |
100%
Hydrostatic Test |
| 38.1 |
.05 |
.28 |
+12.5 |
-12.5 |
3.2 |
0 |
External
polish on all tubes |
| 63.5 |
.05 |
.28 |
+12.5 |
-12.5 |
3.2 |
0 |
|
| 76.2 |
.08 |
.30 |
+12.5 |
-12.5 |
3.2 |
0 |
Refer
to ASTM-A270 |
| 101.6 |
.08 |
.38 |
+12.5 |
-12.5 |
3.2 |
0 |
|
| ASTM-
A312 Seamless & WeldedPipe |
ASTM-
A312Seamless & WeldedPipe |
.4 |
.79 |
Minimum
Wall6.4 |
6.4 |
0 |
Tension
Test |
| 38.1-101.6
incl |
.79 |
.79 |
12.5%
undernominal wall specified |
6.4 |
0 |
Flattening
Test |
| 101.6-203.2
incl |
1.59 |
.79 |
6.4 |
0 |
100%
Hydrostatic Test |
|
|
|
|
(Normally
RandomLengths ordered |
Refer
to ASTM A-530 |
|
|
|
|
|
| Refer
to ASTM A-530 |
219.08-750
mm |
+0.5% |
-0.3 |
6.0 |
Refer
to ASTM A-530 |
|
or
-0.01 inch |
|
|
|
|
|
|
|