1. GOVERNMENT ENGINEERING COLLAGE,SURAT
Subject: Design of machine elements
Topic: PRESSURE VESSEL

2. GROUP MEMBER DANAK HARDIK 140233119002 GOHIL PRAGNES 140233119003
NAYKA ASHISH
MAISURAI JENISH
NAYKA MITESH
PATEL ZAID
VANIYAWALA CHITRANG

3. 1.Structure of vessels:

4. 2.Classification of vessels:
i. According to pressure and its type
Internal Pressure Vessel
—— vessels where the media pressure
inside the vessel is larger than that outside
(gauge pressure).

5. Low pressure vessel (L):
0.1≤P < 1.6 MPa
Medium pressure vessel (M):
1.6 ≤P < 10 MPa
High pressure vessel (H):
10 ≤ P < 100 MPa
Ultra-high pressure vessel (U):
P ≥100 MPa

6. (2)External Pressure Vessel
—— vessels where the media pressure
inside the vessel is lower than that outside
(gauge pressure). When the internal
pressure < 0.1 MPa (absolute pressure),
such vessels are called Vacuum Vessel.

7. ii. According to temperature
Normal temperature vessel
-20< T ≤200℃
Medium temperature vessel
—— between normal T & high T vessels
Low temperature vessel
< -20 ℃
High temperature vessel
—— where the wall temperature is
above the creep temperature.

8. 2.Basic Contents:
i. Selection of materials
Selecting the materials of
equipment according to the technical
indexes t, p, media and the principles of
material selection.
ii. Structure design

9. iii. Calculation of strength and thickness
(including the cylinders and heads)
iv. Strength verification in hydraulic
pressure test
v. Seal design; selecting or designing flanges

10. vi. Selection of support & the verification of
strength and stability
vii. Design and calculation of reinforcement
for opening
viii. Selection of other parts and accessories
ix. Other special design
x. Plotting the equipment drawings
xi. Compiling the equipment specifications

11. 1.Cylindrate shell subjected to uniform gas internal pressure:
∵ R1 = ∞ R2 = D / 2
Putting them into the
previous equations: s D p