Introduction

In this blog article, we will discuss the 7th edition of the Heat Exchange Institute Standards for Steam Jet Vacuum Systems. We will explore the new material provided in the addendum and cover the following sections of the standard: Figure 1A – Typical Steam Jet Ejector Stage Assembly Figure 1B – Typical Fabricated Steam Jet Ejector Table 2 – Tube Material Properties Table 3 – Note 2, Section 5.4.2.2 Figure 21 – Absolute Viscosity of Air Appendix B – Mechanical Characteristics of Tubing Appendix D – ASME List of Material Specifications Appendix L – Condensers Material Stress Values Appendix M – Tube Material Stress Values Appendix N – HEI Steam Jet Vacuum Systems Troubleshooting Guide New Material in the Addendum The addendum to the 7th edition of the Standards for Steam Jet Vacuum Systems provides important updates and additional information for the mentioned sections. Let's take a closer look at each of them:

Figure 1A – Typical Steam Jet Ejector Stage Assembly

This figure illustrates the assembly of a typical steam jet ejector stage. It provides a visual representation of the components and their arrangement. Understanding this assembly is crucial for designing and operating steam jet vacuum systems.

Figure 1B – Typical Fabricated Steam Jet Ejector

In this figure, you can see a typical fabricated steam jet ejector. It showcases the construction and design of a fabricated ejector, highlighting the important features. This information is valuable for manufacturers and engineers involved in the fabrication process.

Table 2 – Tube Material Properties

Table 2 presents the properties of tube materials used in steam jet vacuum systems. It includes essential information such as thermal conductivity, tensile strength, and corrosion resistance. This table helps in selecting the appropriate tube material for specific applications.

Table 3 – Note 2, Section 5.4.2.2

Table 3 provides additional notes and information for section 5.4.2.2 of the standard. It clarifies certain aspects and provides guidance for compliance with the requirements specified in this section. Engineers and technicians can refer to this table for a better understanding of the standard.

Figure 21 – Absolute Viscosity of Air

Figure 21 displays the absolute viscosity of air at different temperatures. This information is essential for calculating the performance and efficiency of steam jet vacuum systems. It allows engineers to determine the flow characteristics and optimize the system accordingly.

Appendix B – Mechanical Characteristics of Tubing

Appendix B provides detailed information on the mechanical characteristics of tubing used in steam jet vacuum systems. It includes data on factors such as burst pressure, collapse pressure, and maximum allowable stress. This information is crucial for ensuring the structural integrity of the system.

Appendix D – ASME List of Material Specifications

Appendix D contains the ASME list of material specifications for steam jet vacuum systems. It provides a comprehensive reference for the materials used in the construction of these systems. Engineers and manufacturers can consult this list to ensure compliance with the industry standards.

Appendix L – Condensers Material Stress Values

Appendix L presents the material stress values for condensers in steam jet vacuum systems. It provides guidelines for determining the maximum allowable stress based on the material properties. This information is vital for designing and operating condensers effectively.

Appendix M – Tube Material Stress Values

Appendix M provides stress values for tube materials in steam jet vacuum systems. It helps engineers calculate the stress levels and ensure the tubes can withstand the operating conditions. This data is essential for maintaining the safety and reliability of the system.

Appendix N – HEI Steam Jet Vacuum Systems Troubleshooting Guide

Appendix N is a troubleshooting guide specifically tailored for HEI steam jet vacuum systems. It presents a comprehensive list of common issues, their probable causes, and suggested solutions. This guide is a valuable resource for operators and maintenance personnel.

Conclusion

The 7th edition of the Heat Exchange Institute standards for Steam Jet Vacuum Systems, along with its addendum, provides essential guidelines and information for designing, fabricating, and operating these systems. The new material in the addendum enhances the understanding and application of the standard, ensuring the safety and efficiency of steam jet vacuum systems.