System Requirement
Product |
|||
MMDI | PMDI | TDI | |
1. Impervious Spill Containment | T | T | T |
2. Material of Construction | |||
Unlined Carbon Steel | S | T | T |
Lined Carbon Steel | S | S | S |
Stainless Steel | S | S | S |
3. Tanks: General | |||
Above Ground | T | T | T |
Safe Access to Top of Tank | C | C | C |
Adequate Tank Capacity | T | T | T |
4. Pressure/Vacuum Rating | |||
Known Working Pressure Rating and Vacuum Rating | T | T | T |
API or ASME Rated | C | C | C |
5. Dry Air or Nitrogen Pad | T | T | T |
6. Venting | T | T | T |
7. Pressure/Vacuum Protection | |||
Primary Vacuum Protection | T | T | T |
Secondary Vacuum Protection | C | C | C |
Primary Pressure Protection | T | T | T |
Secondary Pressure Protection | C | C | C |
8. Level Indicator | T | T | T |
9. Level Alarms | |||
Low-Alarm | C | C | C |
High-Alarm | C | C | C |
10. High-Level Switch | |||
Independent of level indication system | C | C | C |
Terminates flow into tank | C | C | C |
11. Temperature Control | T | T | T |
Temperature Indicator | T | T | T |
Low Temperature Alarm | C | C | C |
High Temperature Alarm | C | C | C |
Insulation | T | S | S |
12. Agitation/Re-circulation | |||
Tank Agitator | S | S | S |
Tank Re-circulation System | C | C | C |
13. Transfer Pump | |||
Sealless Type | C | C | C |
Pressure gauge on discharge side of pump | T | T | T |
Drain valves capped or plugged when not in use |
T | T | T |
Located Inside Containment | C | C | C |
14. Piping | |||
Carbon Steel | N/A | T | T |
Stainless Steel | T | S | S |
Heat Tracing | T | S | S |
Insulation | T | S | S |
15. Gasket | T | T | T |
16. Filters/Strainers | S | S | S |
Drain/Vent Valves With Caps or Plugs | T | T | T |
Pressure Gauge on Both Sides of Filter | T | T | T |
Located Inside Containment | C | C | C |
Temperature Control | T | S | S |
17. Safety Considerations | T | T | T |
Shower & Eyewash | T | T | T |
Fall Protection | T | T | T |
(MMDI) Monomeric Methylene Diphenyl Diisocyanate
(PMDI) Polymeric Methylene Diphenyl Diisocyanate
(TDI) Toluene Diisocyanate
[T] - Equipment typically found on storage tanks that service the identified diisocyanate, and helps provide a basic level of protection against spills, leaks, or injuries. The accompanying text provides additional information.
[C] - Equipment that also helps provide protection against spills, leaks, or injuries of the identified diisocyanate. The accompanying text provides additional information.
[S] - Selection of this equipment depends on the specific product application, there may be several alternatives available. Additional
information and guidelines are presented in the accompanying text.
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