After the minimum thickness has been determined, including corrosion allowance, vessels are often brought to the next highest commercial plate thickness. This raises the question…
Category: Mechanical and Structural
The ASME Code permits various minimum thicknesses of plate. See Figure 400-12. All vessels, regardless of alloy content, should have a minimum thickness of 3/16…
Blind flanges are covered in Code Paragraph UG-34. The computations determine the thickness required for both operating conditions and gasket seating (Equation UW-34). The more…
The Code covers the design of flanges in (mandatory) Appendix 2. The scope of the rules apply to gaskets contained entirely within the bolt circle.…
The cross-sectional area (A) of reinforcement required for openings in vessels subject to external pressure: where: d = Diameter in the given plane of the…
To determine whether an opening is adequately reinforced, it is first necessary to determine whether the areas of reinforcement available will be sufficient without the…
When an opening is made in a pressure vessel shell or head, the ability of the nearby wall to retain pressure is significantly reduced. Reinforcing…
The wall thickness of a nozzle neck or other connection should not be less than the thickness computed for the applicable loadings plus the thickness…
Inspection openings are required by the Code for all pressure vessels containing process environments that cause corrosion, erosion, or mechanical abrasion. Many pressure vessels will…
The Code permits a pressure vessel to be designed with openings of any shape or size. Circular and elliptical openings are recommended because vessel manufacturers…