| Boiler Tubes and Super Heater Tubes Confirming to IS 1914 (Part I & IV)/1982 |
|
Dimensions |
|
Outside Diameter |
Thickness |
|
mm |
mm |
|
25.4 |
2.9 |
|
31.8 |
2.9, 3.2 |
|
38.1 |
2.9, 3.2 |
|
44.5 |
2.9, 3.2 |
|
50.8 |
2.9, 3.2 |
|
57.0 |
2.9, 3.2 | |
| Chemical Composition |
|
Carbon |
0.80% 0.25 % |
|
Manganese |
0.35 % 1.40 % |
|
Silicon |
0.35 % Max |
|
Phosphorous |
0.050% Max |
|
Sulphur |
0.05% Max | |
| Mechanical Properties |
|
Grade |
Tensile Strengths |
|
320 |
320 480 |
|
360 |
360 500 |
|
440 |
440 580 | |
|
1) Note : Each tube is Hydraulically tested to stand 1.5 times of designed pressure subject to minimum of 7 MPA.
2) Tubes are annealed and normalised through out their length. |
|
Tolerances
Maximum Deviation for design metal.
Temperature not exceeding 454ēC
|
a) Thickness
(Excluding the weld) |
+ 10%
- 5% |
| b) Outside Diameter |
+ 0%
- 1% |
c) Weight
On individual lengths + 10% #9; #9; #9; -8%
|
+10%
-8% |
| d) Length:Upto & including 9m + 3mm |
- 0mm |
|
|
|
