Sodium Hypochlorite Storage Tank


Technical Data


Concentration % Temperature1 Resin2
0.5 – 5.25 ≤ 150° F. Derakane 411
0.5 – 5.25 > 150° F. to ≤ 180° F. Derakane 510A, B or C
> 5.25 – 18 ≤ 120° F Derakane 411
> 5.25 – 18 > 120° F. to ≤ 150° F. Derakane 510A, B or C
> 18 – 21 ≤ 110° F. Derakane 510A, B or C
> 21 – 25 ≤ 100° F. Derakane 510A Only

1. Elevated temperatures contribute to chemical decomposition.
2. Belding Tank’s bulk stored house resin is Derakane 411.

CAUTION! The life of a Sodium Hypochlorite Storage tank is greatly affected by the quality of the chemical itself. Tank owners are cautioned to use high quality sodium hypochlorite, to avoid decomposition of the chemical and degradation of the tank.


Two-ply C-Glass or Nexus® (Synthetic)


BPO/DMA (Benzoyl Peroxide / Dimethylaniline) in the corrosion barrier

Co/MEKP (Cobalt Octoate / Methyl Ethyl Ketone Peroxide) in the structural layers


Hot air post cure after assembly for four hours @ 180˚ F.

Tank Exterior:

If the Sodium hypochlorite tank is to be located outdoors:

  • Each tank has U.V. inhibitor in the exterior resin layer.
  • White gel coat should be considered as an option.


Belding Tank uses only Integral (neck and flange face molded together) flanged nozzles.

Bolting Material: T-316 S.S. Standard (Titanium Optional)

Gasket Material: EPDM Standard (Viton™ Optional)


Unless otherwise noted, all tanks are designed for atmospheric pressure only. Belding Tank recommends the vent be equal to or larger than the largest inlet or outlet fitting.

Plumbing to the tank:

Use of flexible connections resistant to sodium hypochlorite –

  • Allows for lateral and vertical expansion and contraction of the sodium hypochlorite storage tank
  • Reduces pump and piping vibration stress on the sodium hypochlorite tank

NOTE: Flexible Connections should be connected to the tank flange. Piping, valves and pumps must have structural support independent of the tank.

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