Product Introduction
Due to its excellent resistance to general corrosion, crevice corrosion, and localized corrosion, Grade 7 titanium pipe is widely used in chemical processing equipment, heat exchangers, condensers, desalination systems, and corrosion-resistant piping applications.
The addition of palladium enhances the stability of the passive oxide film on titanium, allowing Grade 7 titanium to maintain reliable performance in environments where conventional titanium grades may experience corrosion attack.
Key Advantages
Outstanding Corrosion Resistance
Grade 7 titanium provides superior corrosion resistance compared with commercially pure titanium.
It performs exceptionally well in:
Reducing acids
Chloride solutions
Low-pH environments
Hot acidic media
Chemical process fluids
Typical applications include:
Hydrochloric acid systems
Sulfuric acid environments
Chloride-containing solutions
Chemical reactors
Heat exchangers
Excellent Crevice Corrosion Resistance
The Ti-0.2Pd alloy is especially resistant to localized corrosion, including:
Crevice corrosion
Pitting corrosion
Stress corrosion cracking
This makes Grade 7 titanium ideal for sealed equipment and complex structures where stagnant corrosive zones may occur.
High Temperature Corrosion Performance
Grade 7 titanium maintains excellent corrosion resistance at elevated temperatures.
Suitable operating environments include:
High-temperature acid solutions
Chemical evaporation systems
Heat exchangers
Condensation equipment
Good Mechanical Properties
Although designed primarily for corrosion resistance, Grade 7 titanium maintains good:
Strength
Weldability
Formability
Fabrication performance
Chemical Composition
| Element | Requirement (%) |
|---|---|
| Titanium (Ti) | Balance |
| Palladium (Pd) | 0.12 – 0.25 |
| Iron (Fe) | ≤0.30 |
| Oxygen (O) | ≤0.25 |
| Carbon (C) | ≤0.08 |
| Nitrogen (N) | ≤0.03 |
| Hydrogen (H) | ≤0.015 |
| Other Elements | ≤0.10 |
Mechanical Properties
| Property | Grade 7 Titanium |
|---|---|
| Tensile Strength | ≥345 MPa |
| Yield Strength (0.2% offset) | ≥275 MPa |
| Elongation | ≥20% |
Physical Properties
| Property | Value |
|---|---|
| Material Density | 4.51 g/cm³ |
| Alloy Type | Alpha Titanium Alloy |
| Main Alloy Element | Palladium (Pd) |
| Corrosion Resistance | Excellent |
| Magnetic Property | Non-magnetic |
Product Specification
Material Grade
ASTM Grade 7 Titanium
Ti-0.2Pd
Ti-0.15Pd
Ti-0.13Pd
Standard
ASTM B338 - Seamless and Welded Titanium Tubes for Condensers and Heat Exchangers
Manufacturing Conditions
Available conditions:
Hot worked condition (R)
Cold worked condition (Y)
Annealed condition (M)
Solution treated condition (ST)
Quality Inspection
Each Grade 7 titanium pipe is inspected according to strict quality requirements.
Inspection Methods
Hydrostatic pressure test
Ultrasonic testing
X-ray inspection
Eddy current testing
Flaring test
Flattening test
Dimensional inspection
These tests ensure:
No leakage
Internal defect control
Stable mechanical performance
Reliable long-term operation
Applications
Chemical Industry
Grade 7 titanium pipes are widely used in:
Chemical reactors
Reaction vessels
Towers
Autoclaves
Acid processing equipment
Corrosion-resistant pipelines
Heat Exchangers & Condensers
Applications include:
Shell and tube heat exchangers
Condensers
Evaporators
Cooling systems
Advantages:
Excellent resistance to chloride corrosion
Long service life
Reduced maintenance
Water Treatment & Desalination
Used in:
Seawater desalination systems
Reverse osmosis auxiliary equipment
Industrial water treatment systems
Evaporation equipment
Electrochemical Equipment
Suitable for:
Electrolyzers
Acid circulation systems
Corrosion-resistant piping systems
Pumps, Valves and Process Components
Grade 7 titanium is also used for:
Pumps
Valves
Separators
Pipe fittings
High-corrosion mechanical components
Why Choose Grade 7 Titanium Pipe?
Compared with commercially pure titanium:
| Performance | Pure Titanium | Grade 7 Titanium |
|---|---|---|
| General Corrosion Resistance | Excellent | Superior |
| Reducing Acid Resistance | Moderate | Excellent |
| Crevice Corrosion Resistance | Good | Excellent |
| High Temperature Acid Service | Limited | Excellent |
| Cost | Lower | Higher |
The small addition of palladium significantly improves corrosion resistance, making Grade 7 titanium one of the most corrosion-resistant titanium materials available.
Hot Tags:
You Might Also Like
Send Inquiry
