Seamless Stainless Steel TP317 Pipe
ASTM A312 TP317 Pipe | UNS S31700 / EN 1.4449 Manufacturer
Product Overview
Seamless Stainless Steel TP317 Pipe (UNS S31700 / EN 1.4449) is a high-alloy austenitic stainless steel pipe engineered for high-pressure and highly corrosive industrial environments.
Manufactured from a solid billet through a seamless process, TP317 pipes feature:
- No longitudinal weld seams
- Uniform wall thickness
- Enhanced structural integrity
- Higher pressure-bearing capacity
Compared to welded pipes, TP317 seamless pipes provide greater safety, reliability, and longer service life in critical applications.
Why Choose TP317 Seamless Pipe?
High Molybdenum Content (≥ 3.0%)
Improves resistance to:
- Pitting corrosion
- Crevice corrosion
- Chloride-induced attack
Upgraded Alternative to 316 / 316L
TP317 offers superior performance compared to standard 316 grades:
- Better resistance to sulfuric and phosphoric acids
- Improved durability in aggressive chemical environments
High Structural Reliability
Seamless construction eliminates weld defects, ensuring:
- Higher allowable design pressure
- Reduced failure risk in fluid systems
Excellent Fabrication & Weldability
- Good ductility for bending and forming
- Compatible with standard industrial welding methods
Key Advantages of TP317 Stainless Steel Pipe
1. Superior Corrosion Resistance
Performs exceptionally well in:
- Chloride-rich environments
- Sulfuric acid systems
- Phosphoric acid processing
2. High Pressure & Mechanical Strength
- No weld seam weak points
- Suitable for critical pipelines and pressure systems
3. Long Service Life
- Reduced maintenance costs
- Improved lifecycle performance in harsh conditions
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for TP317 stainless steel.
The composition of Stainless Steel 317 is carefully balanced to achieve its superior corrosion resistance and high strength.
Stainless Steel 317 is specifically designed to maintain its strength and shape in high-stress, corrosive environments.
These physical properties highlight the material’s ability to perform reliably under a wide range of conditions.
Manufactured according to international standards:
- ASTM A312
- ASME SA312
- JIS G3459
- EN 10216-5
- GB/T 14976
Common Industrial Applications
TP317 seamless stainless steel pipes are widely used in:
Chemical & Petrochemical Industry
- Acid transport systems
- Reactors and pressure vessels
Pulp & Paper Industry
- Bleaching equipment
- Sulfite liquor handling
Marine & Offshore Engineering
- Seawater cooling systems
- Desalination plants
Textile Industry
- Dyeing and chemical treatment systems
Food & Beverage Industry
- Acidic processing pipelines
- Hygienic fluid transfer systems
Manufacturing Process
The TP317 seamless pipe production process includes:
- Billet Heating
- Piercing (hollow tube formation)
- Cold Drawing / Hot Finishing
- Solution Annealing (≥1040°C, rapid quenching)
- Straightening & Surface Finishing
Quality Assurance & Inspection
100% Inspection Procedures
Non-Destructive Testing (NDT)
- PMI (Positive Material Identification)
- Eddy Current Testing (ET)
- Ultrasonic Testing (UT)
- Hydrostatic Pressure Testing
Mechanical Testing
- Flattening Test
- Flaring Test
- Hardness Test
Corrosion Testing
- Intergranular Corrosion (IGC) Test
- Pitting Resistance Test
