Plastic Tank Transport Services

Plastic tank walls are designed to carry internal fluid pressure and hydrostatic load in the installed and filled condition. They are not designed to carry concentrated external point loads applied at random locations during transport. A tie-down strap placed directly across a plastic tank wall without a load distribution saddle applies concentrated compression that can create a wall deformation or crack at the contact location. That structural damage does not prevent the tank from being set at the installation site, but it creates a leak path that only becomes apparent after the tank is filled, at which point remediation requires draining and repair that was not planned.

Plastic tanks arrive from the manufacturer with molded or threaded fittings and nozzles that are the connection points for all piping and instrumentation in the installed system. Those fittings are positioned and oriented precisely to match the site piping layout, and they are the most structurally vulnerable points on the tank because they represent stress concentration geometry at the tank wall. An impact to a fitting during loading, or a tie-down strap that applies load through a fitting rather than through the tank wall, can create a crack at the fitting-to-wall interface that is invisible externally until the tank is pressurized in service.

Empty plastic tanks have low weight relative to their volume and high wind resistance due to their large surface area. A large plastic storage tank on a flatbed at highway speed experiences significant wind load that works against the tie-down system in directions that a standard cargo securement approach does not fully account for. A tank that is adequately secured against forward and rearward movement may not be adequately secured against the lateral and vertical wind loads that highway speed creates, and those loads can cause the tank to shift in ways that damage the tank wall at the contact points with the trailer deck.

Many plastic tanks are manufactured with integral base rings, leg structures, or skid supports that carry the tank weight in the installed condition and that must arrive undamaged for proper installation. A tank base ring that is cracked during transport creates an uneven bearing condition when the tank is installed that concentrates stress at the crack location during filling. A molded leg structure with an impact crack from rough handling creates a structural failure risk when the filled tank applies load to the damaged leg in service.

Double-wall containment tanks have an inner primary tank and an outer secondary containment wall with an annular space between them that provides secondary containment for regulated chemical storage applications. That annular space must remain sealed and free from liquid entry during both transport and service. Transport handling that damages either wall compromises the double-wall integrity in ways that affect the tank's regulatory compliance as a secondary containment system. For regulated chemical storage applications, double-wall integrity is a compliance requirement that transport handling directly affects.

Plastic tanks for agricultural, rural water supply, and remote industrial applications are installed at sites where access is not designed for the large trailers that carry them. A 10,000-gallon polyethylene tank on a flatbed requires a delivery route that can accommodate the trailer length, and a delivery site that has the crane or lifting equipment to offload the tank safely. Remote property access roads, farm field approaches, and rural right-of-way installations all present access challenges that have to be confirmed before the truck commits to the delivery route.