Rolled from titanium strip and longitudinally welded -- covers a wider OD range than seamless, cost-effective for larger diameters and structural duty.
Supply ranges are presented in three tiers to distinguish industry reference, custom coordination and regular stock availability.
| Parameter | Standard / Industry Reference Range | Custom Supply Range | Regular Stock Range |
|---|---|---|---|
| Outer Diameter (OD) | 6.35 – 610 mm | To Be Confirmed Against Product Requirements | Common welded sizes within the 6.35 – 610 mm range |
| Wall Thickness | Default Sch 40 reference | Final wall thickness confirmed against OD, specification and order requirements | Sch 40 for common OD sizes where stocked |
| Length | 2 – 6 m standard production length | Cut lengths and fixed lengths per order | 2 – 6 m random lengths |
| Weld Type | Longitudinal TIG weld / High-frequency weld | Special weld processes per specification | Standard longitudinal weld |
Welded tube grade availability depends primarily on the titanium strip grade used as feedstock and on the welding route.
Grade 1 (CP Ti), Grade 2 (CP Ti), partial Grade 5 (Ti-6Al-4V). Available in common welded sizes from mill stock.
Grade 3, Grade 4, Grade 7, Grade 9, Grade 12 and other titanium or titanium alloy strip grades. Supply feasibility reviewed per order against tube diameter, wall thickness and strip availability. Not every plate grade transfers directly to welded tube form.
Standards listed below are provided as industry references. Final standard selection must match the actual product form, material grade and order specification.
ASTM B338 / B338M — Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers. Applies specifically to round titanium tubes (both seamless and welded) intended for heat exchanger and condenser service.
ASTM B337 / B337M — Standard Specification for Seamless and Welded Titanium and Titanium Alloy Pipe. Applies to round titanium pipe for general process piping and pressure service.
Applicability of these standards to a specific order depends on tube OD, wall thickness, grade and intended service. Square, rectangular, flat, corrugated, capillary or enhanced-surface titanium tubes are not directly covered by B338/B337 and should be evaluated against the applicable product requirement or agreed specification.
Titanium strip of the required grade is slit to width, inspected and conditioned.
The strip is progressively cold-formed or hot-formed through rolls into a circular tubular shape with an open longitudinal seam.
The longitudinal seam is joined by TIG welding, plasma welding or high-frequency induction welding. Weld route matched to grade and wall thickness.
The welded tube is sized through roll passes to final OD and roundness, straightened, end-faced and cut to length. Nondestructive weld inspection performed.
Welded titanium tubes are selected where the larger OD range or the cost advantage over seamless is the primary consideration, while pressure-class requirements remain moderate.
Low-pressure process piping, transfer lines and auxiliary systems where diameters exceed the practical seamless range.
Frames, towers, support structures and load-bearing members where titanium corrosion resistance is required but pressure containment is not the primary design factor.
Larger-diameter titanium auxiliary piping, condenser waterboxes and flue-gas desulfurization system components.
Corrosion-resistant titanium tubing for seawater systems, brackish water handling and platform auxiliary structures.
Available documentation is coordinated against the order specification and applicable requirements.
Grade 1 (commercially pure titanium), Grade 2 and partial Grade 5 (Ti-6Al-4V) welded tubes are available from mill stock in common sizes within the 6.35 – 610 mm OD range. Other grades including Grade 3, Grade 4, Grade 7, Grade 9 and Grade 12 are produced to order and their feasibility depends on the specific OD, wall thickness and strip feedstock availability.
Seamless titanium tubes are preferred for high-pressure and high-availability applications where a weld seam cannot be accepted. Welded titanium tubes are appropriate for lower-pressure systems, structural uses and service where the larger OD range or cost advantage of welded construction is more important than seam-free continuity. Pressure-class suitability should be confirmed against the project specification and code requirements.
The confirmed outer diameter range for welded titanium tubes is 6.35 – 610 mm. Not every diameter within this range is stocked as regular stock. Common welded sizes are available from mill inventory, while non-standard diameters within the range can be coordinated as custom production.
Sch 40 is a nominal wall thickness schedule reference. It is provided here as a default reference only. Final wall thickness for a specific order must be confirmed against the actual OD, the product specification and the order requirements. Not every size in the 6.35 – 610 mm OD range is produced with Sch 40 wall as standard stock.
To receive an accurate quotation, please provide as many of the following details as possible: outer diameter (OD), wall thickness or schedule, grade, required length, quantity and end preparation. If you have a drawing or specification sheet, please share it with our sales team.
Helpful details: OD, Wall Thickness or Schedule, Grade, Length, Quantity, End Prep (plain / beveled / threaded), Weld Inspection Requirement, Pressure Class, Application
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