table of contents:

  1. General Points
  2. Are There any Unusual Hazards in the Plant Due to
  3. Basis for Specifying the Following
  4. Have the Following Aspects Been Covered on the EFD's and UFD's or Supplementary Control Philosophy Diagrams
  5. Effluents
  6. Environmental Aspects

Engineering and Utility Flow Diagrams

Checklist Queries

1. General Points

1.1. Nature of chemicals to be utilized
1.2. Information available on:

  • Storage
  • Handling of chemicals

1.3. Type of hazards possible
1.4. Method of prevention of same
1.5. Possibility of dust explosion
1.6. Possibility of low temperature flash or autoignition
1.7. Possibility of inter-action between chemicals and plant materials of construction
1.8. Prior experience on this type of plant

2. Are There any Unusual Hazards in the Plant Due to

2.1. High/low temperature
2.2. High/low pressure
2.3. Chemical reactions (i.e. oxidation, operating within explosive limit zones)
2.4. Excessive inventories
2.5. Toxic or flammable materials
2.6. Are there any possibilities of dangerous conditions arising during plant start-up and shut-down period or regeneration of catalysts
2.7. Corrosive materials
2.8. Radiation emission
2.9. Utilities Failures

3. Basis for Specifying the Following

3.1. Design pressures
3.2. Design temperatures
3.3. Materials of construction
3.4. Corrosion allowances
3.5. Insulation requirements for personnel protection
3.6. Insulation requirements for process reasons
3.7. Heat tracing electrical Vs steam

4. Have the Following Aspects Been Covered on the EFD's and UFD's or Supplementary Control Philosophy Diagrams

4.1. Relief valves
4.2. High and low alarms related to:

  1. temperature
  2. pressure
  3. level
  4. flow including backflow protection
  5. pH value
  6. lower and upper explosive limits
  7. motor overload
  8. threshold limit value

4.3. Control valve action on air/direct power failure
4.4. Vents
4.5. Drains
4.6. Flare system
4.7. Non-return valves
4.8. Has the need, in the interest of safety, for remote-operated valves been considered for:

  1. inert gas blanketing
  2. snuffing steam
  3. quench water
  4. shut-down systems
  5. emergency depressurizing systems
  6. emergency isolation valves
  7. foam or water spray system for spheres

5. Effluents

5.1. Is the untreated effluent toxic
5.2. Proposed method of treatment
5.3. Have the relevant approvals for disposal of the effluents been obtained:

  • By whom
  • Name relevant authority

6. Environmental Aspects

6.1. Noise
6.2. Community Impact

Plotplan Review

Checklist Queries

1. Identify Codes of Practice, Statutory Legislation or Client's Requirements Determining
1.1. Overall plant layout, proximity to public access
1.2. Minimum spacing between adjacent plants, interrelated plants and on plot equipment
1.3. Spacing and bunding of storage areas
1.4. Minimum spacing between buildings and hazardous areas
1.5. Location and design of Control Building
1.6 Atmospheric conditions, e.g. wind direction
1.7 Soil conditions and topography

2. Identify Potential Hazards from Highly Flammable or Toxic, or Corrosive Materials. Do These Affect Layout or Impose Restrictions? Identify Requirements.

3. Identify Codes Determining Flare Location (if Included).

4. Identify Fire Fighting and Protection Requirements together with Applicable Codes and Laws

4.1. Firewater, foam, dry powder location
4.2. Fire and gas detection, location of equipment
4.3. Location of utility stations
4.4. Fire protection of structures and equipment

5. Identify Means of Access and Egress

5.1. Overall road access requirements
5.2. Fire access requirements
5.3. Means of escape from areas at grade and bunds
5.4. Means of escape from elevated areas
5.5. Have alternative means of access and egress been developed wherever practicable?

6. Establish Safe Location of Vents and Drains

6.1. Atmospheric relief valve discharges
6.2. Steam and gas vents/drains
6.3. Continuous process vents/drains

7. Noise Profiles

8. Construction Aspects

9. Sampling and Analyzer Points

10. Drainage

11. Plant Security

12. Special Plant Situations, e.g. near Residential Areas, or very Remote