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| |
Reg. 579 c, Reg. 579 d
Plain tubes
|
| |
In no
case the thickness of straight tubes under external pressure
shall not be less than as specified below:-
Tube outside diameter
(mm) |
Minimum thickness
(mm) |
| Not exceeding 32 |
2.10 |
| Exceeding 32 but not exceeding 39 |
2.28 |
| Exceeding 39 but not exceeding 51 |
2.281 |
| Exceeding 51 but not exceeding 70 |
3.12 |
| Exceeding 70 but not exceeding 77 |
3.38 |
| Exceeding 77 but not exceeding 89 |
3.96 |
| Exceeding 89 but not exceeding 102 |
4.26 |
|
Reg. 579 d
Plain tubes
Internal
Pressure: -
The thickness of tubes under internal pressure shall be
calculated as under:
| t = |
WP .D |
+ C |
Equation XII/15 |
| WP + 2f |
Where,
WP = Internal working pressure, kg/cm² (g), and other
symbols as per clarifications indicated at (a) above.
In no case the thickness of straight tubes under internal
pressure shall not be less than listed below:
Tube outside diameter
(mm) |
Minimum thickness
(mm) |
|
Not exceeding 39
|
1.75 |
| Exceeding 39 but not exceeding 51 |
2.16 |
| Exceeding 51 but not exceeding 70 |
2.4 |
| Exceeding 70 but not exceeding 77 |
2.6 |
| Exceeding 77 but not exceeding 96 |
3.05 |
| Exceeding 96 but not exceeding 102 |
3.28 |
| Exceeding 102 but not exceeding 127 |
3.5 |
|
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