PRESSURE, STRESS, STRAIN AND LOANGDING FORM USED IN THE CALCULATION OF CHEMICAL EQUIPMENT

PRESSURE, STRESS, STRAIN AND
LOANGDING FORM USED IN THE
CALCULATION OF CHEMICAL
EQUIPMENT

GROUP 8
Võ Thị Cẩm Tú
61304676
Trương Thị Hân
61301113
Trần Thị Kim Huyền
61301562



CONTENT

A.
DEFINITION

B.
CALCULATION


A. DEFINITION
1. PRESSURE VESSEL
•

Vessel, tanks, and pipelines that carry, store or
receive fluids are called pressure vessels.

•

Pressure vessels are usually spherical or
cylindrical.


Spherical pressure vessel

Pgauge≤ 2.5
N/mm2

Thickness:

Cylindrical pressure vessels

Pgauge ≤10 N/mm2
SSph < SCyl

 The cylindrical vessels are generally preferred


Industrial applications
•

Pressure vessels are used in a number of industries.

•

For example, the power generation industry for fossil
and nuclear power.

• Maximum Allowable Working Pressure (MAWP):
the maximum permissible pressure at the top of the vessel
in its normal operating position at a specific temperature,
usually the design temperature.
P ≤ [P]

• Maximum Allowable Pressure (MAP): The term MAP
is often used. It refers to the maximum permissible pressure
based on the weakest part in the new and cold condition,
and all other loadings are not taken into consideration.


2. STRESS & STRAIN
• The combined stresses due to a combination of loads
acting simultaneously are called stress categories.


Types of Stress
Define a direction of stress or relate to the
application of the load
1. Tensile
2. Compressive
3. Shear
4. Bending
5. Bearing
6. Axial
7. Discontinuity
8. Membrane

9. Principal



Classified of Stress
1. Primary stress
a. General:
o Primary general membrane stress
o Primary general bending stress
b. Primary local stress
2. Secondary stress
a. Secondary membrane stress
b. Secondary bending stress
3. Peak stress, F


STRAIN






3. LOADINGS
• Loadings or forces are the "causes" of
stresses in pressure vessels.
• Type of loading:
o Steady loads
o Non-steady loads
o General loads

o Local loads