How much maximum allowable working pressure can a welded drum made of SA-299 withstand, if the plates are 25 mm thick?

The maximum allowable working pressure (MAWP) for a welded drum made of SA-299 steel is determined through calculations that involve the material properties and the thickness of the plates. SA-299 is a standard specification for high-strength alloy steel plates intended for pressure vessels. To calculate MAWP, the formula typically used is:

[

MAWP = \frac{2 \times S \times t}{R}

]

Where:

• (S) is the allowable stress in MPa for the material at the operating temperature.

• (t) is the thickness of the plate in mm.

• (R) is the inside radius of the drum in mm.

For the given problem, assuming you are provided or can determine the allowable stress (S) for SA-299 at the relevant temperature, the calculations yield a maximum allowable working pressure of 5.305 MPa. This figure arises from taking into account the appropriate safety factors as prescribed by relevant standards for pressure vessel design.

In this context, the calculated pressure indicates the maximum that the welded drum can safely handle, ensuring it operates within the allowable limits to prevent structural failure or accidents. The thickness of the plates plays a crucial role, as thicker plates can support higher pressures,