Acid Neutralization Tank Installation and Its Piping Connection

This article is about Acid Neutralization Tank Installation and Its Piping Connection in commercial buildings, plants and refinery projects related to Plumbing Engineering System as per international codes and standards.

Acid Neutralization Tank Installation and Its Piping Connection

1. Acids and chemical waste shall be discharged into Neutralization Tank
   Exception: Acid or chemical wastes may be discharge to local sewer with prior approval of the Chairman of Plumbing and Utilities Standard Committee.”
2. The tank shall be made of or shall be coated with, acid cresistant material
3. Neutralization tank shall be in a readily accessible location, and shall be vented to the outside.
4. The minimum vent size for Neutralization tank shall be 2 in (63 mm OD).
5. Inlet piping and each vent connected thereto shall be constructed of the following chemical resistant material:
   a) Chemical resistant Borosilicate Glass pipe and fittings DWV, ASTM C1053 – 90,
   b) Corrosion Resistant High Silicon Iron pipe and fittings DWV, ASTM A861 and ASTM A518 (for example Duriron Silicon Pipe),
   c) Schedule 40 PVC DWV, where no hydrocarbon or solvent wastes are present, and the temperature of the waste does not exceed 50°C (120°F) and
   d) Schedule 40 Polypropylene DWV, where temperature of the waste does not exceed 50°C (120°F)
   e) Other corrosion resistant material
   Note: Material identified in part c, d, and e may only be used upon written approval of the Chairman of Plumbing and Utilities Standards Committee prior to purchase of the material in question.”
6. Discharge piping from the neutralization tank need not be acid resistant.
7. Vents from chemical and acid waste systems, including the neutralization tank vent, shall not be connected to any waste venting system.
   Exception: Vents from chemical and acid waste systems, including neutralization tank may be connected to any waste venting system, if the system is constructed of the material stated in item no. 5 of this checklist.

International Codes and Standard References for Acid Neutralization Tank Installation

1- SAES-S-060 – Saudi Aramco Plumbing Code.
2- Uniform Plumbing Code (UPC).

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