MDI Transportation Guidelines - Polyurethanes - American ...
MDI Transportation Guidelines - Polyurethanes - American ...
MDI Transportation Guidelines - Polyurethanes - American ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<strong>MDI</strong> transportation<br />
g u i d e l i n e s<br />
7.6.2 Routine Inspection of Rail Tank Cars<br />
Administrative Procedures<br />
The shipper should verify that:<br />
1. The rail car is DOT approved and authorized for <strong>MDI</strong> transport.<br />
2. The safety valve and tank test dates are current.<br />
3. The carrier has been provided with the appropriate shipping documentation and emergency<br />
response information.<br />
Before loading<br />
The shipper should have a comprehensive pre-loading procedure that includes, as a minimum,<br />
verification that:<br />
1. The rail car is in good physical condition and is safe to transport <strong>MDI</strong>.<br />
2. All the valves and domes are properly secured.<br />
3. The rail car capacity is adequate for the quantity to be loaded.<br />
4. The rail car has all the necessary specific equipment and is clean, dry, and in proper working condition.<br />
5. All valves function correctly.<br />
During loading<br />
1. The loading operation should be monitored continuously. (49 CFR § 174.67)<br />
2. Loading personnel should ensure that specified filling levels are not exceeded.<br />
After loading<br />
The shipper and driver should verify:<br />
1. The maximum allowable gross weight for the vehicle has not been exceeded.<br />
2. All the valves, blind flanges and domes have been closed, are secured properly, and leak free.<br />
3. All seals or locks are in place.<br />
4. The exterior of the tank is clean and free from product residue.<br />
5. The proper markings and identification numbers for <strong>MDI</strong> (NA3082) are affixed.<br />
7.6.3 Maintenance of Transport Equipment<br />
During operation, unscheduled maintenance of the transport equipment may be necessary. The chemical<br />
reaction of <strong>MDI</strong> with water in the atmosphere leads to the formation of urea, which could plug the valves<br />
and block the pressure relief valves and piping. Customers should be instructed to immediately report<br />
any difficulties to the shipper and to their maintenance department. One means of communicating is to<br />
attach an information tag identifying problems to the returning transport equipment.<br />
Copyright 2001, <strong>American</strong> Plastics Council<br />
21
Change language