Hydrochloric Acid Image

Hydrochloric Acid

Controlling a chemical – and its fumes

Also known as muriatic acid, hydrochloric acid is used to acidize petroleum wells, remove scales from boilers, aid in ore reduction and serve as a chemical intermediate, among other applications.

This pungent liquid is a strong, highly corrosive acid, and it presents serious storage challenges:

  • Hydrochloric acid has an extremely low pH, making it highly corrosive.

  • The chemical creates toxic fumes that can deteriorate equipment – and these fumes can be fatal to employees. To control the chemical’s fumes, the tank’s venting system must be exact.

  • Tank maintenance can also be an issue because of fuming. Entering the tank must be avoided at all costs, and part replacement must be minimized.

By creating a strong, corrosion-resistant tank system that ties into a scrubber system, all of these issues can be addressed.

Talk to a chemical storage tank expert Chemical Resin Type Specific Gravity Rating Fitting Material Gasket Material Bolt Material Hydrochloric Acid ≤ 37% XLPE 1.9 PVC EPDM C-276


Tank Specifications

IMFO® construction eliminates the need to enter the tank for cleaning, helping employees avoid HCl's toxic fumes. 

High-density crosslinked polyethylene (XLPE) ensures the strength of the tank. 

Recommended System Components

SAFE-Tank® Double Wall Tank System

SAFE-Tank® Double Wall Tank System

Secondary containment: SAFE-Tank® is recommended where secondary containment is not available.

IMFO® Fittings

IMFO® Fittings

Fittings: IMFO® system is recommended. 

The B.O.S.S. Fitting®

The B.O.S.S. Fitting®

Fittings: B.O.S.S. fitting® is also recommended to prevent leaks.

PTFE Expansion Joint

PTFE Expansion Joint

Plumbing: requires flexible connections with fittings on lower third of sidewall to accomodate contraction and expansion, and reduce vibration stress on the tank. 

Fume-Tight Manway Cover

Fume-Tight Manway Cover

Fume-tight manway cover: 17", 19" or 24" with EPDM gaskets

PolyScrub™ and PolyScrub Plus™

PolyScrub™ and PolyScrub Plus™

Individually designed to support the reduction of dangerous fumes into the environment.

Technical Overview


IMFO® Vertical Flat Bottom of XLPE:

  • 1,000–13,650 gallons

  • 1.9 spg rating

Non-IMFO® alternative:

Standard Vertical Flat Bottom XLPE:

  • 1,000–13,650 gallons

  • 1.9 spg rating


  • 1,500–8,700 gallons

  • 1.9 spg rating for primary tank

  • Spg ratings for secondary tanks ≥ 3,000 gallons may be equal to or 1 less spg than primary tank.

  • All other tank sizes must equal primary tank spg rating.

Secondary containment

Recommend SAFE-Tank® secondary XLPE as shown above

Non-SAFE-Tank® Alternatives:

  • PPC secondary containment basin

  • Other secondary containment suitable for hydrochloric acid, of adequate size for use


Sidewall: Recommend 3˝ maximum B.O.S.S. fitting® 

Dome: No restrictions

Plumbing to the tank

  • Required use of flexible connections with fittings on lower third of sidewall

    • Allows for lateral and vertical expansion and contraction of the tank

    • Reduces pump and piping vibration stress on the tank

  • Expansion joints must meet the following minimum requirements:

    • Axial Compression ≥ .67˝
    • Axial Extension ≥ 0.67˝
    • Lateral Deflection ≥ 0.51
    • Angular Deflection ≥ 14°
    • Torsional Rotation ≥ 4°


See Venting Chart

Foundation and restraints

  • PPC IMFO® tank pad or smooth concrete, asphalt or steel foundation designed to accommodate IMFO®, SAFE-Tank® or vertical tank

  • No restraint or ladder attachment bands circumscribing the tank are allowed. Cable restraint systems must pass cables over the top of the tank.


Product should not exceed 100°F at delivery or during storage to maintain ASTM D1998 design parameters.


Fume-tight manway cover to manage release of chemical gases


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