Safety Systems

Pro

The code-required safety equipment on a refrigeration system: relief, vent lines, and machinery rooms.

Overview

Safety Systems sizes the protective equipment a refrigeration system is required to carry, and produces the deliverables a code review asks for: required relief discharge capacity for the fire case, an API 526 orifice selection sized with the ASME air-flow equation, the maximum vent-line run for the selected discharge pipe, and machinery-room emergency ventilation, all following ASHRAE 15 and IIAR 2 methodology, with the underlying factors and equations shown for submittal.

Key features

• Sixteen refrigerants from one shared registry: safety class, GWP, ASHRAE 34 refrigerant concentration limit and the ASHRAE 15 relief f-factor all come from a single source the whole suite reads, so a fluid means the same thing in every tool that mentions it
• Fire-case required capacity C = f·D·L with refrigerant-specific f factors
• Combustible-occupancy multiplier for vessels near combustible materials
• API 526 orifice selection (letters D through T) via the ASME air-flow relation
• Vent-line check from isothermal compressible flow, giving allowable length per pipe size
• Machinery-room emergency ventilation, Q = 100·√G per ASHRAE 15 §8.11.5, prefilled from the Charge Inventory total
• Capacity and set pressure carry between tabs automatically
• Reference tabs with the underlying factors and equations for review submittals

How to use it

1. 1

   Click Safety Systems on the RIME ribbon (Refrigeration panel).

2. 2

   Enter the vessel dimensions, refrigerant, and relief set pressure.

3. 3

   Review the required capacity and recommended orifice letter.

4. 4

   Switch to the Vent Line tab to verify the discharge piping run.

5. 5

   Use the Machine Room tab for the emergency ventilation rate.