When examining the dynamics of a job in which a frac tank or multiple frac tanks are used, several key factors should be considered to ensure safe and efficient operation of these tanks. Here are a few operational tips to consider:
Over-pressurizing when filling
- Frac tanks may be equipped with a pressure relief valve; but the ability of the valve to relieve the pressure may be exceeded by filling the tank too quickly.
- We recommend you open the manway on top of the tank to allow air pressure to escape.
Creating a vacuum when draining
- Although tanks may be equipped with vacuum relief valves, the ability of the valve to relieve the vacuum caused by rapid fluid exit may be exceeded creating a vacuum inside the tank resulting in partial collapse and irreparable damage.
- We recommend you open the manway on top of the tank to allow air to enter when pumping fluid out of the tank.
Understand flexibility provided by valves and ports
- Most tanks feature multiple ports through which fluid can be pumped in or out of the tank.
- In addition to the two 4″ butterfly drain valves, most tanks feature at least a third butterfly valve, an overfill tube, and multiple ports on top of the tank which may be adapted for particular operational requirements.
Be aware that tanks containing any amount of fluid cannot be moved
- The rear axles on tanks are rated only for the weight of the tank itself, and the weight of almost any amount of fluid would exceed the rating.
- Unlike transport trailers, frac tanks do not contain interior baffles to minimize fluid movement during transportation.