Technical Specifications & Standards
Titanium Grade Comparison
The selection of the appropriate titanium grade is crucial for application success. Below is a comprehensive comparison of the most commonly specified grades for seamless pipes.
Titanium Grade Specifications & Properties
Grade | UNS Number | Primary Alloying Elements | Key Characteristics | Typical Applications |
Grade 1 | R50250 | Commercially Pure (CP) – 99.5% Ti min | Highest ductility and corrosion resistance. Excellent formability and weldability. Lowest strength. | Chemical processing liners, anodes, desalination tubing where maximum corrosion resistance is needed. |
Grade 2 | R50400 | Commercially Pure (CP) – 99.2% Ti min | The most common general-purpose grade. Excellent balance of strength, ductility, and corrosion resistance. | Heat exchanger tubing (seamless titanium pipe for heat exchanger), seawater cooling pipes, chlorine dioxide bleaching equipment, architectural components. |
Grade 5 (Ti-6Al-4V) | R56400 | 6% Aluminium, 4% Vanadium | The most widely used titanium alloy. High strength, good fatigue resistance, moderate high-temperature capability. | Aerospace structural components, high-performance automotive parts, marine fittings, surgical implants. |
Grade 7 | R52400 | CP Ti + 0.15% Palladium | Similar to Grade 2 but with palladium addition for enhanced crevice corrosion resistance in reducing acids. | Chemical processing equipment handling hot, concentrated chloride solutions or sulfuric acid. |
Grade 9 (Ti-3Al-2.5V) | R56320 | 3% Aluminium, 2.5% Vanadium | Medium-strength alloy with good weldability and formability. Superior strength to CP grades, better ductility than Gr5. | Hydraulic tubing in aerospace, bicycle frames, sports equipment, marine piping systems. |
Grade 12 (Ti-0.3Mo-0.8Ni) | R53400 | 0.3% Molybdenum, 0.8% Nickel | Excellent corrosion resistance at elevated temperatures. Good weldability and high creep strength. | Shell and tube heat exchangers for high-temperature, corrosive service, geothermal applications. |
International Standards Compliance
BENKOO METAL titanium seamless pipes are manufactured to meet or exceed the world's most recognized material and dimensional standards.
Governing Standards for Titanium Seamless Pipes
Standard System | Standard Number | Title / Scope | Commonly Applied Grades |
American (ASTM/ASME) | ASTM B338 / ASME SB338 | Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes | All grades (Gr1, Gr2, Gr5, Gr7, Gr9, Gr12, etc.) |
| ASTM B861 / ASME SB861 | Standard Specification for Titanium and Titanium Alloy Seamless Pipe |
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European (DIN) | DIN 17860 | Titanium and titanium alloys – Seamless tubes – Technical delivery conditions |
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International (ISO) | ISO 5832-2 | Implants for surgery — Metallic materials — Part 2: Unalloyed titanium | Gr1, Gr2, Gr4 |
Japanese (JIS) | JIS H 4630 | Titanium and titanium alloy tubes for heat exchangers |
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Russian (GOST) | GOST 24890 | Seamless titanium tubes |
Size Range & Dimensional Specifications
We offer a versatile range of sizes to accommodate diverse project requirements, from precision instrumentation to large-scale industrial systems.
Standard Titanium Seamless Pipe Size Range
Parameter | Standard Range | Extended / Custom Capability | Tolerances (Typical per ASTM B338) |
Outside Diameter (OD) | 6 mm to 150 mm | Up to 250 mm upon request | ±0.13 mm to ±0.38 mm, depending on OD |
Wall Thickness (WT) | 0.5 mm to 15 mm | Custom thicknesses available | ±10% of nominal wall |
Length | Up to 15,000 mm (15m) | Custom cut lengths or random lengths | ±3 mm for cut lengths |
Example Specific Size | OD 25mm x WT 2mm is a commonly stocked size for instrumentation and small-bore process lines. |
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Typical Mechanical Properties of Key Grades (Annealed Condition)
Grade | Tensile Strength (min) | Yield Strength (0.2% Offset, min) | Elongation (min) |
Grade 2 | 345 MPa (50 ksi) | 275 MPa (40 ksi) | 20% |
Grade 5 | 895 MPa (130 ksi) | 828 MPa (120 ksi) | 10% |
Grade 7 | 345 MPa (50 ksi) | 275 MPa (40 ksi) | 20% |
Grade 9 | 620 MPa (90 ksi) | 483 MPa (70 ksi) | 15% |
Grade 12 | 483 MPa (70 ksi) | 345 MPa (50 ksi) | 18% |
Applications by Industry
Chemical Processing & Petrochemical
Titanium's resistance to chlorides, oxidizing acids, and seawater makes it indispensable in chemical plants.
Specific Applications: Heat exchanger tubing for hydrochloric acid cooling, reactor jackets, chlorine dioxide bleach plant washers, pickling line equipment, and anode baskets for electroplating.
Recommended Grades: Grade 2 for general chloride service, Grade 7 for severe reducing acid environments (e.g., hot sulfuric acid), Grade 12 for high-temperature acidic salting.
Seawater Desalination & Marine
Titanium is virtually immune to corrosion in seawater, even at high velocities and temperatures.
Specific Applications: Multi-stage flash (MSF) and reverse osmosis (RO) plant tubing, brine heater tubes, seawater cooling condenser tubes for power plants and ships, offshore platform piping systems.
Recommended Grades: Grade 2 is the standard for all seawater applications. Its performance ensures decades of service without failure.
Aerospace & Defense
The high strength-to-weight ratio and compatibility with composites are critical.
Specific Applications: Hydraulic system tubing, fuel lines, engine bleed air ducts, firewalls, and structural airframe components.
Recommended Grades: Grade 5 (Ti-6Al-4V) for high-strength structural parts, Grade 9 (Ti-3Al-2.5V) for hydraulic tubing requiring a balance of strength and formability.
Power Generation
Used in condenser cooling systems, especially where brackish or polluted water is used.
Specific Applications: Surface condenser tubing, cooling water systems, flue gas desulfurization (FGD) system components.
Recommended Grades: Grade 2 for condenser tubes, Grade 12 or Grade 7 for more aggressive environments in FGD systems.
Medical & Pharmaceutical
Biocompatibility and corrosion resistance are paramount.
Specific Applications: Surgical instrument components, implantable device housings, pharmaceutical processing equipment requiring high purity.
Recommended Grades: Grade 1, 2, 4 (CP Ti) for biocompatibility. Grade 5 for load-bearing implants.
Quality Assurance & Control
Every BENKOO METAL titanium seamless pipe undergoes rigorous inspection to guarantee compliance and performance.
Chemical Analysis: Verification via Optical Emission Spectrometry (OES) to ensure grade specification.
Mechanical Testing: Tensile tests performed on samples from each heat lot.
Non-Destructive Testing (NDT): 100% Ultrasonic Testing (UT) or Eddy Current Testing (ECT) to detect internal and surface defects as per ASTM E2375.
Hydrostatic Testing: Conducted as per standard requirements or customer specification.
Dimensional Inspection: Full verification of OD, wall thickness, length, and straightness.
Certification: We supply full material traceability with EN 10204 3.1/3.2 Type Inspection Certificates, which include chemical and mechanical test reports, heat number, and NDT results.
Frequently Asked Questions (FAQ)
Q1: What Is The Minimum Order Quantity (MOQ) For Titanium Seamless Pipes?
A: Our standard MOQ is 100 kg or one bundle. For specific sizes like titanium tube OD 25mm wall 2mm, we may have stock available for smaller trial orders.
Q2: What Is The Typical Delivery Lead Time?
A: For standard grades and sizes (e.g., Gr2 titanium seamless pipe), delivery is within 4-8 weeks. Custom sizes or specialized alloys may require 8-12 weeks.
Q3: What Certifications Do You Provide?
A: We provide Mill Test Certificates (MTC) compliant with EN 10204 3.1/3.2, which include chemical composition and mechanical properties. Additional third-party inspection (e.g., SGS, BV) or material-specific certifications (e.g., NACE, PED) can be arranged.
Q4: Can You Supply Pipes To Dimensions Not Listed In Your Standard Range?
A: Yes, BENKOO METAL specializes in custom manufacturing. Please provide your detailed specification (OD, WT, Grade, Length, Tolerance) for a quotation.
Q5: Why Choose Seamless Over Welded Titanium Pipe?
A: Seamless pipes offer superior homogeneity, higher pressure ratings, and are free from weld-related imperfections, making them essential for critical, high-integrity applications in aerospace, high-pressure heat exchangers, and corrosive chemical service. For non-critical or large-diameter applications, welded pipe may offer a cost advantage. (Internal Link: Learn about our Titanium Welded Pipe options for cost-effective solutions.)
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