Value Proposition & Technical Advantages
BENKOO METAL's welded titanium pipe is engineered to bridge the gap between the superior material properties of titanium and practical project economics. By utilizing advanced welding technologies from coiled strip or plate, we produce long-length, large-diameter pipes that maintain titanium's inherent resistance to chlorides, acids, and seawater, while avoiding the high cost and size limitations of seamless extrusion.
Key Benefits:
Significant Cost Savings: Up to 30-50% cost reduction compared to seamless titanium pipe of equivalent size and grade, with no compromise on corrosion resistance in the parent material.
Unmatched Diameter Range: We can produce pipes with an Outside Diameter (OD) from 6mm to 2000mm (2 meters), far exceeding the typical limits of seamless manufacturing. This is ideal for large tanks, scrubbers, and ducts.
Controlled Welding Processes: Utilizing automated TIG, Plasma, and Laser welding ensures consistent, high-integrity welds with minimal heat-affected zones, preserving the material's properties.
Comprehensive Post-Weld Treatment: Every weld seam undergoes internal and external grinding, followed by full solution annealing and pickling/passivation. This restores the corrosion resistance of the weld zone to match the base metal and ensures dimensional stability through precision straightening.
Proven for Large Projects: The welded construction is perfectly suited for static, low-fatigue applications common in processing plants, making it the standard for large-volume, non-rotating components.
Application Scenarios
Large Chemical & Petrochemical Vessels: Liners for reactors, columns, and large-diameter process piping where solid titanium plate would be prohibitively expensive. Excellent for handling chlorides, acetic acid, and other aggressive media.
Power Plant Flue Gas Desulfurization (FGD): Ducting, absorber tower liners, and outlet stacks where hot, wet, acidic gases containing chlorides and sulfates rapidly degrade standard materials.
Marine & Offshore Engineering: Seawater intake and discharge lines, ballast system piping, and structural components on ships and platforms requiring immunity to seawater corrosion.
Pulp & Paper Bleach Plants: Large piping for chlorine dioxide and other corrosive bleaching chemicals.
Water & Desalination: Large-diameter intake pipes, brine lines, and components in multi-stage flash (MSF) evaporators.
Manufacturing Process & Selection Guide
Welding Method Selection Guide for Titanium Pipe
Welding Process | Best For | Typical Wall Thickness Range | Key Advantages | BENKOO METAL Recommendation |
Automatic TIG (GTAW) | Most general applications, high-purity systems, all grades. | 0.5 mm – 6.0 mm | Excellent weld quality and control, cleanest weld pool, best for thin walls and critical services (e.g., pharmaceutical). | The default choice for most titanium welded tube in chemical and marine service. |
Plasma Arc Welding (PAW) | Higher productivity for medium thickness, consistent deep penetration. | 3.0 mm – 12.0 mm | Higher welding speed than TIG, deeper penetration with a single pass, more tolerant of fit-up variations. | Ideal for mid-range wall thickness pipes where production efficiency is important. |
Laser Welding (LBW) | Precision, high-speed welding for thin materials, minimal distortion. | 0.1 mm – 4.0 mm | Extremely narrow heat-affected zone (HAZ), very high speeds, excellent for repetitive, high-volume production of small tubes. | Used for specialized, thin-wall instrumentation tubing or where distortion must be absolutely minimized. |
Economic & Technical Decision Analysis
The choice between welded and seamless titanium pipe is a fundamental engineering and procurement decision. The following table provides a clear comparison to guide specification.
Welded vs. Seamless Titanium Pipe – Economic & Technical Analysis
Parameter | Welded Titanium Pipe | Seamless Titanium Pipe | Implication for Buyer |
Relative Cost | Significantly Lower (30-50% savings typical) | Higher | Welded pipe offers major CAPEX savings, especially for large diameters and volumes. |
Maximum Diameter (OD) | Very Large (Up to 2000mm+) | Limited (Typically ≤ 250mm for extrusion) | Welded is the only viable option for large tanks, ducts, and major process lines. |
Lead Time | Generally Shorter (standard sizes from coil stock) | Can be Longer (especially for custom sizes) | Faster project timelines with welded pipe for standard grades. |
Weld Integrity | Single longitudinal weld seam, 100% inspected (RT/UT). | No longitudinal weld. | Both are reliable. Seamless has a perceived advantage, but modern welded pipe with full NDT is qualified for most static services. |
Wall Thickness Consistency | Very Good (from precision-rolled plate/coil) | Excellent (from extruded hollow) | Both are suitable for pressure design. Seamless may have an edge in ultra-high-pressure applications. |
Ideal Application Profile | Large diameters, low/medium pressure, static systems, vessels, ducting, large process lines. | Small to medium diameters, high pressure, rotating equipment (e.g., shafts), applications with high cyclic fatigue. | Welded is optimal for the chemical industry, FGD, and marine structures. Seamless is preferred for tubing in heat exchangers, aerospace, and high-pressure systems. |
Quality Assurance & Specifications
Material Standards: Pipes are fabricated from strip or plate conforming to ASTM B265.
Product Standards: Supplied to ASTM B862 (Welded Titanium Pipe) and ASME SB862 for pressure applications.
Welding Procedure: All welding follows qualified Welding Procedure Specifications (WPS).
Non-Destructive Testing (NDT): 100% of the weld seam is inspected via Radiographic Testing (RT) or Automated Ultrasonic Testing (AUT).
Post-Weld Heat Treatment: Full solution annealing in a vacuum or argon atmosphere furnace to relieve stresses and restore corrosion resistance.
Final Treatment: Acid pickling and passivation to remove oxidation and restore a uniform, passive surface film.
Certification: Full EN 10204 3.2 Type Inspection Certificates with traceability to melt, including chemical, mechanical, and NDT reports.
Choose BENKOO METAL for intelligent titanium solutions！
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