In an industrial plant, depending on the process and the number of piping systems, the capital investment in piping could be up to 25 and even 40% of the total investment. Therefore, efficient sizing is vital to the plant economic feasibility. When an installation presents very long pipelines and/or it requires expensive materials (Cr-Mo, Stainless […]
Non-standard flanges will only be used in cases where pressure, temperature and size requirements exceed the capabilities of standard flanges. Keep in mind that non-standard flanges require calculation, design and special manufacturing procedures, which is why they are chosen only as a last resort. The most common such applications are large equipment flanges and heat […]
Fatigue analysis is often more demanded for Pressure Vessels and Shell and Tube Heat Exchangers (S&T). Operating conditions involving pressure and/or temperature cycles could result in a fatigue analysis requirement. Previous to perform a fatigue analysis is necessary to run screening criteria in order to check according to ASME VIII Div. 2 Ap. 5.5. if […]
Joint efficiency of welds can be defined as the reliability that can be obtained from the joints after welding. This coefficient can adopt values smaller than 1, and to some extent it can be said that the joint efficiency is a way of reducing the allowable stress of the material. Therefore, the joint efficiency depends […]
Often the material that can resist corrosion from the environment of a particular application may not have adequate structural strength. Or because of its low strength it may require use of uneconomically thick sections. An economical solution consists of providing a layer of corrosion-resistant material of suitable thickness on the contact surfaces of the equipment, […]
The design temperature, along with the design pressure, fluid characterization and other technical-economical requirements, is a critical parameter in the design and material selection of process equipment, instrumentation and piping. The selection criteria differ slightly depending on the engineering practices, but generally consist of assigning a design margin to the maximum (and minimum) normal operating […]