2018 IFC changes in HAZMAT piping requirements

2018 is just around the corner and with it’s arrival comes the 2018 International Fire Code (IFC) and some changes.  For those in the process safety arena or just storing/handling/processing hazardous materials, Chapter 50 Hazardous Materials, is a valuable resource for the design of piping systems conveying those hazardous materials.  In 2018 IFC there are some changes to sections 5003 & 5005 and how section 5005 of code will be applied.  Here are the changes:

5003.2.2.1 Design and construction

Piping, tubing, valves, fittings and related components used for hazardous materials shall be in accordance with the following:

1. Piping, tubing, valves, fittings and related components shall be designed and fabricated from materials that are compatible with the material to be contained and shall be of adequate strength and durability to withstand the pressure, structural and seismic stress and exposure to which they are subject.
2. Piping and tubing shall be identified in accordance with ASME A13.1 to indicate the material conveyed.
3. Manual valves or automatic remotely activated fail-safe emergency shutoff valves shall be installed on supply piping and tubing and provided with ready access at the following locations:
   1. The point of use.
   2. The tank, cylinder or bulk source.
4. Manual emergency shutoff valves and controls for remotely activated emergency shutoff valves shall be identified and the location shall have access clearly visible and indicated by means of a sign.
5. Backflow prevention or check valves shall be provided where the backflow of hazardous materials could create a hazardous condition or cause the unauthorized discharge of hazardous materials.

Exceptions:

1. 1. Piping for inlet connections designed to prevent backflow.
   2. Piping for pressure relief devices.

The following changes will apply ONLY when the when the maximum allowable quantity per control area (MAQ) is exceeded for use, dispensing or handling.  This section requires an approved means of leak detection and either an emergency shutoff or excess flow control for the most hazardous classes of gases and liquids when they are pressurized to over 15 psig. Previously, this requirement applied to any amount. Now, this requirement will apply when the MAQ is exceeded. Therefore, the facility must be a Group H occupancy

5005.1.12 Emergency Isolation

Where gases or liquids having a hazard ranking of Health Class 3 or 4, Flammability Class 4 or Instability Class 3 or 4 in accordance with NFPA 704 are carried in pressurized piping above 15 pounds per square inch gauge (psig) (103 kPa), an approved means of leak detection and emergency shutoff OR excess flow control shall be provided.

Where the piping originates from within a hazardous material storage room or area, the excess flow control shall be located within the storage room or area. ‘

Where the piping originates from a bulk source, the excess flow control shall be located as close to the bulk source as practical.

Exceptions:
1. Piping for inlet connections designed to prevent backflow.
2. Piping for pressure relief devices.

Based on IFC Appendix F “Hazard Ranking”, these requirements apply to: