Anhydrous Ammonia System Piping Requirements This fact sheet was prepared by the Minnesota Department of Agriculture to provide information on some of the State of Minnesota requirements for facilities, which store, handle and use anhydrous ammonia on their premises. I have paraphrased the list below: Provides is a tutorial and reference book that represents the collective efforts of the most knowledgeable specialists in the ammonia refrigeration industry. Figure 1 is a flow diagram of a typical single-stage ammonia system, showing its basic components. Bulletin 114 has for over 20 years focused on correct labeling of pipe and equipment in an industrial ammonia refrigeration system. operation of an ammonia refrigeration system. #whitebanner li {
anhydrous ammonia. Relief Regulators, 6-10, Application of ASME Liquid Relief Valves, 6-11, Application of Hydrostatic Relief Valves, 6-12, Appendix A: Effect of Inlet Piping on Relief Valve Capacity, 6-13, Appendix B: Application of Balanced Relief Valves, Pilot var size=parseInt(tag[n].style.fontSize.replace("px", ""));
The primary article is titled “The Color Conundrum IIAR Defines Piping Convention” and announce to some changes that will be happening to Bulletin 114 that will be re-released in 2014. Artificial cooling systems keep industry running, and many of these systems use anhydrous ammonia as a refrigerant. For example, ammonia-based refrigeration systems include large networks of piping and machinery, with almost every pipe carrying the same material: anhydrous ammonia. Good refrigeration piping design requires that the refrigeration lines be pitched in the direction of flow at approximately 1/2 inch per 10 feet or 1 inch per 20 feet. IIAR – AMMONIA REFRIGERATION PIPING. OVERVIEW OF RISK ASSESSMENT. History. P&ID diagrams for various typical systems are shown in Appendix A, simplified for purposes of clarity. .. For ammonia systems, IIAR Bulletin also addresses the subject of safety valves.
What are the hazards of ammonia refrigeration, and what can be done to keep workers safe? The piping abbreviation, pipe contents, and flow direction would be . piping to and from the evaporative condenser has a direct effect on their operation and the overall energy efficiency of the refrigeration system. 0000001178 00000 n
114. IIAR published Appendix A: Guidelines for Preparation of Ammonia Refrigeration Diagrams to the Ammonia Refrigeration Piping Handbook in 2012. 0000002731 00000 n
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Additional information regarding the properties of ammonia is published in the IIAR Ammonia Data Book. Ammonia piping should conform to ASME Standard B, Refrigerant Piping Reprinted by permission from ASHRAE Handbook-Refrigeration. How do these systems work? selecting ammonia refrigerant system, is the smaller mass flow rate required to be handled with an ammonia system as compared with R-22 refrigerant systems. What are the hazards of ammonia refrigeration, and what can be done to. This type of refrigeration unit will cost 10-20% less than other models. for ammonia refrigeration systems, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: T1 Interpret Drawings Refrigeration Piping Schematic Diagrams Refrigeration Layout Diagrams Electrical Control Diagrams PLC Control Diagrams After all piping has been tested for pressure and insulation has been applied, the ammonia refrigeration system is evacuated with a vacuum pump to remove excess air and moisture.
Chapter 6 - Piping for Pressure Relief Devices, Chapter 7 - Insulation for Refrigeration Systems, Appendix B - Lists of Figures, Tables and Equations, U.S. Department of Labor | Occupational Safety & Health Administration | 200 Constitution Ave., NW, Washington, DC 20210, Recommended Method (Based on an economic analysis), Conventional Method (Based on pressure loss), 1-6, Hot Gas Defrost and Receiver Equalizer Lines, 1-14, Sample Ammonia Vapor Flow Calculations, 1-16, Sample Ammonia Vapor Flow Calculations, 1-19, Appendix: Piping Sizing Example Using Tables, 1-21, Compressor High Stage Suction (HSS), 1-21, Compressor High Stage Discharge (HSD), 1-21, Equalizer (EQ) for High Pressure Receiver, 1-22, Accumulator Low Pressure Liquid (LPL), 2-1, Impact Testing for Low-Temperature Piping, 3-2, Safety Considerations in Piping Systems, 3-12, Detailed Piping Recommendations for the Installation of if(tag[n].style.fontSize){
Operated Relief Valves and Rupture Discs, 7-5, Effect of Water/Ice/Moisture on Insulation Value, 7-11, Jacketing (Weather Barrier or Primary Moisture Retarder), 7-12, Recommended Practices for Insulation Applications, 7-16, Additional Considerations for Vessels, 7-19, Vapor Retarder-Mastic System (Indoor Service), 7-20, Vapor Retarder Mastic (Indoor and Outdoor Service), 7-20, PVC Cladding/Jacket (Indoor Service), 7-21, Vapor Retarder and Cladding/Jacket (Outdoor Service), 7-22, Vapor Retarder-Mastic System (Outdoor Service), 8-1, Pertinent ANSI Codes and Standards for Welding, 8-2, Jurisdictional Acceptance of Standards, 8-3, Shielded Metal Arc Welding (SMAW, or Stick Welding), 8-3, Gas Metal Arc Welding (GMAW, or MIG Welding), 8-4, Sample Specifications for Welding of Ammonia Piping, 9-2, Titles and Sources of Codes, Standards, and Guidelines. active, Most Current. ��|U=�m)���������Y��EP�/�)�V[��ar�z�R"�� "��W�;�=�.7�'�ѵ���ԙ�]����l^
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Firstly the general requirements of safe refrigeration system design will be considered, based on the accident statistics given in section 2 and secondly the specific additional requirements particular to ammonia … A 100 ton plant with –25°C evaporating temperature /+40°C condensing temperature requires about 1193kg/ hr of saturated liquid ammonia to provide the desired refrigeration effect. The opposing flow of refrigerant gases, as shown in the left diagram in Figure 66F02C, can set up a turbulence that may cause pulsation in the piping. Ammonia Refrigeration Systems: IIAR Bulletin No. 32 0 obj
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Contact our knowledgeable, helpful staff toll-free by telephone at 800-990-9423 or by email at equipment@reccousa.com to create or update your facility’s P & IDs today. Office: 708.308.0002 Fax: 708.301.7336. The present invention relates generally to commercial refrigeration systems, and more particularly to an improved dry suction ammonia refrigeration system. �����VȵЯ�c��_����4�����x��J�@X����AzT�3>�r�(}D�:�h�%�c�}��,�1�8owP�����b�qzo�������5�2��=��͚�6w&��/bq@-3����K��s���NG@.�)u�f
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