ASTM B363 Wpt 7 Titanium Tee

A tee fitting (also known as a tee joint or pipe tee) is a pipe fitting used to connect or branch from a main pipeline. It typically features three openings - either one inlet and two outlets, or two inlets and one outlet - allowing fluid flow to be redirected within the piping system.

Types of Tee Fittings

Equal Tee (T/S)

All three branches have the same diameter.

Reducing Tee (T/R)

One branch has a smaller diameter than the main pipeline, enabling flow reduction or distribution control.

Material Options

Manufactured from pure titanium and titanium alloys, including:

Gr1 /Gr2 /Gr3 /Gr5 (Ti-6Al-4V) /Gr7 /Gr9 /Gr12

Material selection depends on required strength, corrosion resistance, and service environment.

Specifications

Outer Diameter: DN10 – DN302 (customizable)

Wall Thickness: 1–15 mm (Sch5s – Sch160)

Standard: ASTM International – ASTM B363 (Titanium and Titanium Alloy Fittings)

Surface Finish: Pickling (acid cleaning for surface smoothing and oxide removal)

Manufacturing Processes

Hydraulic Expansion Method

Process Description:
A titanium tube is placed inside a hydraulic mold. Internal hydraulic pressure is applied, forcing material outward through a branch opening to form the tee.

Advantages:

• Smooth surface finish

• Efficient for standard wall thickness

Limitations:

• Not suitable for very thick-walled tees

Production Steps:

1. Select titanium tube with proper diameter and wall thickness

2. Cut tube to required length (with allowance)

3. Position tube in mold and fill with liquid

4. Apply hydraulic pressure to form branch

5. Heat treatment

6. Trim and surface cleaning

7. Bevel machining at branch ends

8. Final inspection

Hot Extrusion Method

Suitable For:

• Large diameter tees

• Thick-walled tees

• Special or high-strength alloys

Process Description:
A larger-diameter titanium billet or tube is heated to forging temperature and forced through a die, forming both the main body and branch outlet.

Advantages:

Handles difficult materials

Suitable for larger sizes

Good structural integrity

Production Steps:

1. Heat titanium to forging temperature

2. Apply pressure to push material through die

3. Adjust dimensions of body and branch

4. Heat treatment and finishing

Butt Welding Method

Suitable For:

• Large diameter tees (typically Φ133 mm and above)

Process Description:
Two half sections (formed from pipe or plate) are fabricated and welded together to form the complete tee.

Advantages:

• Ideal for large diameter and thick-wall structures

• Flexible fabrication method

Quality Control

To ensure reliability and structural integrity:

• 100% Radiographic Testing (RT / X-ray inspection)

• 100% Penetrant Testing (PT)

• Dimensional inspection

• Visual surface inspection

Applications

Titanium tee fittings are widely used in industries requiring high corrosion resistance, strength, and long service life:

• Aerospace

• Chemical processing

• Medical equipment

• Oil & gas

• Marine engineering

• Power generation

They are critical components for maintaining fluid flow integrity and system reliability in demanding environments.

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