: Methods for calculating vapor and liquid flow capacities, estimating pressure loss, and selecting appropriate valves.
Ammonia lines experience significant thermal movement between ambient and operating temperatures (-40°F to 300°F). The handbook details:
Because of these properties, proper piping design is not just a matter of system efficiency—it is a critical safety requirement. The handbook bridges the gap between theoretical engineering principles and practical, real-world application. Core Focus Areas of the Handbook
Using the IIAR Piping Handbook helps facilities achieve several critical goals: IIAR Books
| Standard / Document | Primary Focus | Key Requirements / Content | | :--- | :--- | :--- | | | Piping design guidance, engineering methods | Pipe sizing (single & two-phase flow), economic analysis, system layout, software tools | | ANSI/IIAR 2-2021 | Mandatory safety design standard | Equipment/machinery room design, piping identification (Appendix Q), piping supports, seismic design | | ASME B31.5 | Refrigeration piping code | Material specifications (steel only), fabrication, assembly, testing requirements for piping | | IIAR 6-2019 | Inspection, testing & maintenance | Annual inspection of piping supports, degradation checks, mounting bolt verification | | ANSI/IIAR 4-2020 | Installation requirements | Piping support systems installation; welding restrictions as per ASME B31.5 |
: Specific design requirements for evaporators, condensers, and equipment rooms.
Incorrectly sized pipes lead to efficiency losses or equipment damage. The manual provides charts, equations, and tables to calculate: Suction line sizing to maintain oil return. Discharge line sizing to minimize pressure drops. Liquid line sizing to prevent flash gas formation. 3. Valve and Component Selection
The handbook serves as a comprehensive introduction to modern piping practices, focusing on: Design & Installation
: The standard for safe design of closed-circuit ammonia refrigeration systems.
Engineers, designers, piping/fabrication contractors, safety professionals, plant operators, and maintenance personnel involved with ammonia refrigeration systems.
Works alongside IIAR 2 (Safe Design of Closed-Circuit Ammonia Refrigeration Systems) and ASME B31.5 (Refrigeration Piping and Heat Transfer Components). 2. Fundamental Piping Design Principles
Specific recommendations for piping evaporators, condensers, and pressure relief devices.