ASME B31.5 pdf free download
ASME B31.5-2019 pdf free download.Refrigeration Piping and Heat Transfer Components ASME Code for Pressure Piping, B31.
This Refrigeration Piping and Heat Transfer Components Code is a Section of the American Society of Mechanical Engineers (ASME) Code for Pressure Piping, B31. This Section is published as a separate document for simplicity and for convenience of Code users. The users of this Code are advised that in some areas legislation may establish governmental jurisdiction over the subject matter covered by the Code. The owner of a piping installation shall choose which piping codes are applicable to the installation and shall have the overall responsibility for compliance with this Code. (See Nonmandatory Appendix B.) The owner of a complete piping installation shall have the overall responsibility for compliance with this Code.
It is required that the engineering design specify any special requirements pertinent to the particular service involved. For example, the engineering design shall not for any service specify a weld quality lower than that stipulated in para. 527.3.2(d) for the Code-required visual examination quality and for the types of welds involved; but where service requirements necessitate added quality and more extensive nondestructive examination, these are to be specified in the engineering design and any revision thereto, and when so specified, the Code requires that they be accomplished.
The Code generally employs a simplified approach for many of its requirements. A designer may choose to use a more complete and rigorous analysis to develop design and construction requirements. When the designer decides to take this approach, the designer shall provide details and calculations demonstrating that design, contruction, examination, and testing are consistent with the criteria of this Code. The details shall be documented in the engineering design.
19 500.1 Scope
Rules for this Code Section have been developed considering the needs for applications that include piping and heat transfer components for refrigerants and secondary coolants.
This Code prescribes requirements for the materials, design, fabrication, assembly, erection, test, and inspection of refrigerant, heat transfer components, and secondary coolant piping for temperatures as low as —320°F (—196°C), whether erected on the premises or factory assembled, except as specifically excluded in the following paragraphs.
500.1.1 ExcLusions. This Code shall not apply to any of the following:
(a) any self-contained or unit systems subject to the requirements of Underwriters Laboratories or other nationally recognized testing laboratory
(b) water piping, other than where water is used as a secondary coolant or refrigerant
(c) piping designed for external or internal gage pressure not exceeding 15 psi (105 kPa) regardless of size
(d) pressure vessels, compressors, or pumps, but does include all connecting refrigerant and secondary coolant piping starting at the first joint adjacent to such apparatus
500.1.2 Units of Measure. This Code states values in both U.S. Customary (USC) and International System (SI) units. Within the text, the SI units are shown in parentheses or in separate tables. The values stated in each system are not exact equivalents; therefore, each system of units should be used independently of the other.
When separate equations are provided for USC and SI units, those equations shall be executed using variables in the units associated with the specific equation. The results obtained from execution of these equations may be converted to other units. When necessary to convert from one system of units to another, conversion should be made by rounding the values to the number of significant digits of implied precision in the starting value, but not less than four significant digits for use in calculations.
500.2 Definitions
For convenience in reference, some of the more common terms relating to piping are defined in this paragraph.ASME B31.5 pdf download.
