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To provide safe and efficient transporting of bulk containers, such as ASME tanks and DOT specification tanks, employees should know and understand the required DOT regulations as well as be able to apply proper transporting procedures.
In this module you will learn to identify:
1. Load inspection rules for tanks and cargo in transit
2. Procedures for transporting DOT intermodal (IM) portable tanks
3.7.11 Preparing DOT Intermodal (IM) Tanks for Transportation
Identifying Procedures for Transporting DOT Intermodal (IM) Portable Tanks
Tank Openings for Valves
• Openings except for pressure-relief devices, inspection openings, and closed bleed holes must be fitted with at least three mutually independent shut-off devices in series:
– An internal stop-valve with internal excess flow device
– An external stop-valve
– A blank flange or threaded cap, plug or equivalent tight liquid closure device (Figure 2) Figure 2. Shut-off Devices in Series
Identifying Procedures for Transporting DOT Intermodal (IM) Portable Tanks
Tank Openings for Valves• For filling and discharge openings located below the liquid level, the internal
stop-valve must be a self-closing safety device that fully closes automatically during filling or discharge in the event of fire within 30 seconds of the actuation of the thermal means of closure. Except for tanks having a capacity of less than 264 water gallons, this device must be operable by remote control.
Identifying Procedures for Transporting DOT Intermodal (IM) Portable Tanks
Mounting and Lifting Hardware
Note:
Check the skids, lugs and support plates for damage before working with a DOT portable tank. Corrosion or cracked welds are extremely dangerous. If there is any damage, notify your supervisor immediately.
Identifying Procedures for Transporting DOT Intermodal (IM) Portable Tanks
• DOT Intermodal (IM) Portable Tanks• Regardless of the cargo restraining devices used, DOT regulations in 49
CFR § 393.126 require that securement devices must restrain the container from moving more than ½ inch in any direction relative to the transport vehicle, railcar, or vessel. {2.4.11.8} Securement devices must be inspected before use, and damaged devices cannot be used
Identifying Procedures for Transporting DOT Intermodal (IM) Portable Tanks
• When IM portable tanks are transported on vehicles other than container chassis vehicles the following requirements apply:
• All lower corners of the intermodal container must rest upon the vehicle
• Each container must be secured to the vehicle by chains, wire ropes, or integral devices which are fixed to all lower corners (or crossed chains fixed to all upper corners).
• The front and rear of the container must be secured independently. Each chain, wire rope, or integral locking device must be attached to the container in a manner that prevents it from being unintentionally unfastened while the vehicle is in transit.
Identifying Procedures for Transporting DOT Intermodal (IM) Portable Tanks
The requirements for locating the hazard class placards are as
follows: • IM Tanks with a rated LP-gas capacity greater than 1,000 gallons - four
placards, one on each side and each head of the tank (never on the bottom of the tank).
• IM Tanks with a rated LP-gas capacity less than 1,000 gallons - two placards or labels, one located on each side of the tank near the shipping name or one on
each head of the tank.
The DOT regulatory reference for unloading intermodal portable tanks is found in 49 CFR § 177.834 (o).