PP Tanks

PP Tanks

PP TANKS

Excel Engineering specializes in the fabrication and onsite chemical storage tank installation , We fabricate premium grade polypropylene tanks using PPH Sheets of various thickness and customized sizes as per client requirements.

What Are Polypropylene (PP) Tanks?

Polypropylene tanks are storage and process tanks made from polypropylene, a thermoplastic polymer known for its excellent chemical resistance, low weight, and thermal stability. These tanks are typically fabricated by welding polypropylene sheets and are used to store or process corrosive chemicals, water, effluents, and more.

⚙️ 2. Key Properties of PP Tanks

Property

Description

Chemical Resistance

Excellent resistance to most acids, alkalis, and corrosive chemicals

Temperature Resistance

Typically up to 90°C – 100°C (short-term up to 120°C)

Mechanical Strength

Good – not as strong as metals but suitable for moderate mechanical loads

Non-Toxic & Food Safe

Food-grade variants available – safe for food and pharmaceutical use

Lightweight

Easier to transport, install, and maintain compared to metal tanks

UV Resistance

Moderate – can be enhanced with additives or external coatings

Weldability

Easily weldable for custom fabrication and leak-proof joints

Non-Conductive

Electrically insulating – safe for chemical and electronic environments

Low Cost

Economical compared to SS and sometimes even MS tanks

🏭 3. Industrial Applications of PP Tanks

PP tanks are widely used across multiple industries, especially where corrosion resistance and chemical compatibility are key:

Industry

Application

Chemical Processing

Storage and mixing of acids, alkalis, solvents

Electroplating & Metal Finishing

Acid/alkali cleaning tanks, plating tanks, rinsing tanks

Water & Wastewater Treatment

Storage of treated/untreated water, effluents, neutralization tanks

Pharmaceutical

Clean process tanks, storage of raw materials

Food & Beverage

Food-grade PP tanks for brine, additives, non-reactive ingredients

Textile

Dyeing, bleaching, and chemical dosing tanks

Fertilizer & Pesticide Plants

Storage of corrosive liquid fertilizers and chemical components

Electronics

Etching, cleaning, and rinsing tanks

🧱 4. Types of PP Tanks (Based on Material Variants)

Type

Properties & Applications

Homopolymer PP (PP-H)

Higher rigidity, better chemical resistance, slightly lower impact strength

Copolymer PP (PP-C or PPH-C)

Improved impact resistance, better performance at low temperatures

Glass-Filled PP

Reinforced for added stiffness and structural strength – used where higher mechanical loads exist

UV-Stabilized PP

Contains UV inhibitors – suitable for outdoor installation

Antistatic PP

Special variant to reduce static charge – used in explosive or sensitive environments

⚖️ 5. Comparison: PP Tanks vs MS Tanks vs SS Tanks

Parameter

PP Tanks

MS (Mild Steel) Tanks

SS (Stainless Steel) Tanks

Cost

✅ Low

✅ Moderate (cheaper than SS)

❌ High (especially SS316/SS304)

Chemical Resistance

✅ Excellent for acids, alkalis

❌ Poor – requires lining or coating

✅ Excellent (depends on grade)

Weight

✅ Very light

❌ Heavy

❌ Heavy

Maintenance

✅ Minimal (non-corrosive)

❌ High (needs repainting/coating)

✅ Low (if maintained well)

Lifespan

✅ 15–25 years (depends on use)

❌ 5–10 years (corrosive applications)

✅ 20–30+ years

Temperature Resistance

❌ Limited to ~100°C

✅ High (up to 400°C)

✅ High (up to 600°C depending on grade)

Food/Pharma Grade

✅ Food-safe variants available

❌ No (unless lined)

✅ Widely used in hygienic applications

Installation

✅ Easy & quick

❌ Heavy lifting, complex foundation

❌ Complex handling

Custom Fabrication

✅ Easily customized via welding

❌ Time-consuming

❌ More expensive to customize

UV Resistance

❌ Needs UV stabilization

✅ Naturally resistant with paint

✅ High

 

🧪 6. Chemical Compatibility of PP Tanks

PP tanks are ideal for storing chemicals such as:

  • Hydrochloric Acid
  • Sulfuric Acid (Dilute)
  • Sodium Hypochlorite (Bleach)
  • Caustic Soda (NaOH)
  • Nitric Acid (Dilute)
  • Ammonia Solutions
  • Detergents and Cleaning Agents
  • Fertilizer Solutions
  • Brine and Saline Water

⚠️ Not recommended for:

  • Strong oxidizing acids (like fuming nitric acid)
  • High-temperature solvents
  • Aromatic hydrocarbons (e.g., toluene, benzene)

🔧 7. Common Shapes and Configurations of PP Tanks

Type

Application

Vertical Cylindrical Tanks

Storage of liquids in limited floor space

Horizontal Tanks

For large-volume storage or transport

Rectangular / Square Tanks

Common in plating, dipping, and chemical baths

Conical Bottom Tanks

Easy drainage, used in sedimentation or mixing

Open-Top Tanks

For process tanks, rinsing, plating, chemical treatment

Double-Wall Tanks

Extra safety for hazardous chemical storage

Conclusion – When Are PP Tanks Most Suitable?

Choose Polypropylene tanks when:

  • You are storing corrosive chemicals under moderate temperature conditions
  • Budget is a constraint, and SS tanks are too expensive
  • Customization or onsite fabrication is required
  • The application needs non-conductive or food-safe tanks
  • Maintenance and corrosion are major concerns

 

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