Category Archives for Mechanical Design of Pressure Vessels

Pressure Vessels – Pressure Relief Devices, Corrosion Protection

Pressure Relief Devices All pressure vessels should be equipped with one or more pressure safety valves (PSVs) to prevent overpressure. This is a requirement of both the ASME Code and API RP 14C (refer to Chapter 14). The PSV should … Continue reading

24. September 2009 by Jack
Categories: Specification and Design | Tags: | Leave a comment

Pressure Vessels – Vessel Supports, Ladder and Platform

Vessel Supports Small vertical vessels may be supported by angle support legs, as shown in Figure 12-11. Larger vertical vessels are generally supported by a skirt support, as shown in Figure 12-12. At least two (2) vent holes, 180° apart, … Continue reading

24. September 2009 by Jack
Categories: Specification and Design | Tags: | Leave a comment

Pressure Vessels – Vortex Breaker, Manways

Vortex Breaker As liquid flows out of the exit nozzle, it will swirl and create a vortex. Vortexing would carry the gas out with the liquid. Therefore, all liquid outlet nozzles should be equipped with a vortex breaker. Figure 12-9 … Continue reading

24. September 2009 by Jack
Categories: Specification and Design | Tags: , , | Leave a comment

Pressure Vessels – Nozzles

Nozzles should be sized according to pipe sizing criteria, such as those provided in API RP 14E. The outlet nozzle is generally the same size as the inlet nozzle. To prevent baffle destruction due to impingement, the entering fluid velocity … Continue reading

24. September 2009 by Jack
Categories: Specification and Design | Tags: | Leave a comment

Pressure Vessels – Shop Drawings

Before the vessel fabrication can proceed, the fabricator will develop complete drawings and have these drawings approved by the representative of the engineering firm and/or the operating company. These drawings are called shop drawings. They will show detailed vessel design … Continue reading

24. September 2009 by Jack
Categories: Specification and Design | Tags: , , | Leave a comment

Pressure Vessels – Specifications

Most companies have a detailed general specification for the construction of pressure vessels, which defines the overall quality of fabrication required and addresses specific items such as: • Code compliance • Design conditions and materials • Design details • Vessel … Continue reading

24. September 2009 by Jack
Categories: Specification and Design | Tags: , | Leave a comment

Pressure Vessels – Estimating Vessel Weights

It is important to be able to estimate vessel weights, since most cost estimating procedures start with the weight of the vessel. The vessel weight, both empty and full with water, may be necessary to adequately design a foundation or … Continue reading

23. September 2009 by Jack
Categories: Mechanical Design of Pressure Vessels | Tags: | Leave a comment

Pressure Vessels – Inspection Procedures

All ASME Code vessels are inspected by an approved Code inspector. The manufacturer will supply Code papers signed by the inspector. The nameplate on the vessel will be stamped to signify it has met the requirements of the Code. One … Continue reading

23. September 2009 by Jack
Categories: Mechanical Design of Pressure Vessels | Tags: | Leave a comment

Pressure Vessels – Determining Wall Thickness

The following formulas are used in the ASME Code Section VIII, Division 1 for determining wall thickness: Wall thickness—cylindrical shells Figure 12-1 defines the various types of heads. Most production facility vessels use ellipsoidal heads because they are readily available, … Continue reading

23. September 2009 by Jack
Categories: Pressure Vessels - Design | Tags: | Leave a comment

Pressure Vessels – Maximum Allowable Stress Values

The maximum allowable stress values to be used in the calculation of the vessel’s wall thickness are given in the ASME Code for many different materials. These stress values are a function of temperature. Section VIII of the ASME Code, … Continue reading

23. September 2009 by Jack
Categories: Pressure Vessels - Design | Tags: , , | Leave a comment

← Older posts