Pipeline Special Anti-Corrosion Polyurea Coating
PS700A is a 100% solid aromatic polyurea coating specially developed for buried pipeline anti-corrosion protection. With excellent chemical resistance, flexibility, waterproof performance, and mechanical strength, it provides long-lasting protection against soil erosion, corrosion, and harsh underground environments.
Product Overview
PS700A is a 100% solid aromatic spray polyurea coating specially developed for buried pipeline anti-corrosion protection. It provides excellent resistance against moisture, chemicals, soil erosion and mechanical stress in demanding underground environments.
With fast curing speed, high flexibility and strong adhesion, PS700A forms a seamless protective barrier without joints or weak points, effectively isolating pipelines from corrosive media. The coating maintains stable physical performance under complex geological conditions, temperature changes and long-term underground service.
PS700A is widely used for corrosion protection of oil and gas pipelines, municipal underground pipelines, industrial pipe systems and other buried steel infrastructure requiring reliable long-term protection.
Key Features & Benefits
1. Excellent Anti-Corrosion Protection
PS700A provides comprehensive protection against various underground corrosion factors:
- Excellent resistance to acids, alkalis and salts
- Strong resistance to chloride and sulfide corrosion
- Effective waterproof barrier against groundwater and soil moisture
- Protection against chemical erosion from industrial environments
The dense polyurea coating structure helps prevent corrosion initiation and extends the service life of buried pipelines.
2. High Flexibility and Crack Bridging Ability
Unlike traditional rigid coatings, PS700A maintains coating integrity when pipelines experience movement or substrate deformation.
Advantages include:
- High elongation and elastic recovery
- Resistance to cracking caused by ground settlement
- Adaptation to thermal expansion and contraction
- Effective coverage of small substrate cracks
This flexibility ensures continuous protection during long-term pipeline operation.
3. Fast Curing and Efficient Application
PS700A reacts and cures within seconds after spraying, significantly improving construction efficiency.
Benefits:
- Rapid film formation
- Suitable for large-scale pipeline projects
- Applicable on horizontal, vertical and inclined surfaces
- Reduced project downtime
- Seamless coating without joints
Professional high-pressure two-component spray equipment is recommended for application.
4. 100% Solids and Environmentally Friendly
PS700A contains no solvent or thinner and provides 100% solid content.
Environmental advantages:
- Zero VOC emissions
- No solvent evaporation risks
- Suitable for environmentally demanding construction projects
- Meets modern green coating requirements
Typical Applications
PS700A is designed for corrosion protection applications including:
Oil & Gas Pipeline Protection
- Crude oil transmission pipelines
- Natural gas pipelines
- Petrochemical transportation pipelines
Municipal Infrastructure
- Underground water supply pipelines
- Drainage systems
- Sewage treatment pipeline networks
Industrial Pipeline Systems
- Buried steel pipelines
- Chemical transportation pipelines
- Corrosion-sensitive underground facilities
Advantages Compared with Traditional Pipeline Coatings
| Performance | PS700A Polyurea Coating | Traditional Coatings |
|---|---|---|
| Protection Structure | Seamless protective film | May have joints and weak areas |
| Curing Speed | Seconds curing, fast construction | Longer curing period |
| Flexibility | High flexibility and crack resistance | Easy cracking under stress |
| Chemical Resistance | Excellent comprehensive resistance | Limited resistance range |
| Solvent Content | 100% solids, zero VOC | Usually contains solvents |
| Service Life | Long-term underground durability | Requires frequent maintenance |
Technical Data
Basic Properties
| Item | Part A | Part B |
|---|---|---|
| Appearance | Light Yellow | Adjustable |
| Specific Gravity | 1.15 | 1.03 |
| Viscosity @25℃ | 710 cps | 580 cps |
| Solid Content | 100% | 100% |
| Mixing Ratio (Volume) | 1:1 | |
| Gel Time @25℃ | 3-5 seconds | |
| Theoretical Coverage | 1.05 kg/m² (1mm DFT) |
Physical Performance
| Item | Test Standard | Result |
|---|---|---|
| Hardness (Shore D) | ASTM D2240 | 45 |
| Tensile Strength | ASTM D412 | 20 MPa |
| Elongation at Break | ASTM D412 | 150% |
| Tear Strength | ASTM D624 | 67 kN/m |
| Adhesion Strength (Concrete) | HG/T3831-2006 | 3.2 MPa |
| Adhesion Strength (Steel) | HG/T3831-2006 | 12 MPa |
| Impermeability | HG/T3831-2006 | Impermeable |
| Wear Resistance | HG/T3831-2006 | 4.8 mg |
| Cathodic Disbondment | HG/T3831-2006 | ≤15mm |
Chemical Resistance
PS700A demonstrates excellent chemical durability after long-term immersion testing.
| Test Condition | Result |
|---|---|
| 10% Sulfuric Acid / 30 days | No rust, bubbles or peeling |
| 10% Hydrochloric Acid / 30 days | No rust, bubbles or peeling |
| 10% Sodium Hydroxide / 30 days | No rust, bubbles or peeling |
| Salt Solution / 30 days | No rust, bubbles or peeling |
| Salt Spray Test / 2000h | No rust, bubbles or peeling |
| Diesel & Crude Oil / 30 days | No rust, bubbles or peeling |
Application Method
Surface Preparation
Before spraying, the substrate should be:
- Clean and dry
- Free from oil, dust and loose particles
- Properly prepared to ensure strong adhesion
Spray Application
- Mix Part B thoroughly before use
- Apply within the recommended primer recoating period
- Use professional two-component spray equipment
- Maintain correct pressure and mixing ratio during application
Recommended Equipment
Professional high-pressure two-component polyurea spray equipment with:
- Stable pressure control
- Accurate mixing ratio system
- Uniform spray performance
Packaging
- Component A: 220 kg / 200L drum
- Component B: 210 kg / 200L drum
Color Options
- Standard Color: Gray
- Customized colors available according to customer requirements
Storage & Shelf Life
Storage Conditions
Store in a cool and dry environment at 5℃-35℃.
Keep containers sealed and avoid direct sunlight.
Shelf Life
9 months under recommended storage conditions.
