Sulfuric Acid (H2SO4) Storage Tanks for Concentrations ≥ 80%
Tank:
SAFE-Tank® of crosslinked polyethylene with OR-1000™
- Up to 8700 gallons
- 2.2 spg rating for primary tank
- 1.9 spg rating for secondary tank
Non SAFE-Tank® Alternatives
- 1000 to 6600 gallons: vertical, flat bottom tank, crosslinked polyethylene with OR-1000™, 2.2 spg rating
- Up to 1000 gallons: vertical, flat bottom tank, crosslinked polyethylene, 1.9 spg rating
- IMFO® is available for full drainage (limit one per tank)
Secondary Containment (REQUIRED)
SAFE-Tank® secondary tank of crosslinked polyethylene with 1.9 spg rating
Non SAFE-Tank® Alternatives
- PPC secondary containment basin of crosslinked polyethylene
- Other secondary containment suitable for sulfuric acid and of adequate size
Fittings:
Sidewall:
- 3" maximum size on the lower 1/3 sidewall
- Fitting must keep sulfuric acid from contacting tank wall cross section
Dome: No restrictions
Fitting Material of Construction:
- Concentrations ≥ 93%: PVC & CPVC (schedule 80), 316 ss or higher, Alloy C-276
- Concentrations 80% - 92%: PVC & CPVC (schedule 80), Alloy C-276, DO NOT use stainless steel
Gasket Material of Construction: Latharage Viton
Plumbing to the Tank:
Required us of flexible connections with fittings on lower 1/3 of sidewall
- Allow for lateral and vertial expansion and contraction of the tank
- Reduces pump and piping vibration stress on the tank
Flexible connections, piping, and valves must have structural support independent of tank sidewall and dome
Venting:
| Venting Requirements For Polyethylene Tanks |
| Mechanical Pump Fill |
Pneumatic Fill |
| IF ≤ 1000 gallons |
IF - Vent length ≤ 3 feet |
IF - Vent length > 3' and ≤ 30' |
IF - Scrubber Application |
| Vent size should equal size of largest fill or discharge fitting |
AND - Vent screen mesh size ≥ 1/4" or no screen used |
AND - 3 or less 90° elbows with no other |
Vent pipe size throughout scrubber system CANNOT be reduced! |
| IF > 1000 gallons |
Emergency Pressure Relief Cover Required |
Emergency Pressure Relief Cover Required |
Perforated dispersion pipe must be same diameter or larger, as vent. Sum of perforations ≥ cross section area of pipe |
| Vent size should not exceed the largest fill or discharge fitting by 1 inch |
Tanker
Discharge |
Inlet/Fitting
Size |
Min. Vent Size |
| 2" |
2" |
4" |
| 3" |
2" |
6" |
| 3" |
3" |
6" |
|
Tanker
Discharge |
Inlet/Fitting
Size |
Min. Vent Size |
| 2" |
2" |
6" |
| 3" |
2" |
6" |
| 3" |
3" |
8" |
|
Tanker
Discharge |
Inlet/Fitting
Size |
Min. Vent Size |
| 2" |
2" |
6" |
| 3" |
2" |
8" |
| 3" |
3" |
10" |
|
(2) 2" vents DO NOT EQUAL 4" venting capacity.
For detailed venting guidelines, please
contact
us.
Foundation and Restraints:
Smooth concrete, asphalt, or steel foundations.
No restraint or ladder attachment bands circumscribing the tank are allowed; cable restraint systems must pass cables over the top of the tank or utilize molded-in lifting lugs when appropriate.
Temperature:
Product should not exceed 100 degrees F at delivery or during storage.
