Titanium Tube Sheet

A titanium tube sheet is one of the core components of shell-and-tube heat exchangers. It is a circular plate drilled with a large number of precisely positioned holes used to accommodate heat exchange tubes. The tube holes are slightly larger than the outer diameter of the tubes to allow for tube expansion or welding.

The tube sheet serves two critical functions:

1. Fixing and supporting the heat exchange tubes

2. Sealing and separating different process media within the heat exchanger

As a key pressure-bearing and sealing component, the machining accuracy of the titanium tube sheet-including tube hole pitch, hole diameter tolerance, perpendicularity, and surface roughness-has a direct impact on equipment assembly quality, operational safety, and long-term performance in chemical and thermal systems.

Product Description

Product Name: Titanium Tube Sheet

Pressure Standard: PED 4.3 – Safety Technical Supervision Rules for Fixed Pressure Vessels

Materials:

Titanium Grade 2

Titanium Grade 12

Titanium-clad steel plate

Applicable Standards:
ASTM, AISI, ASME, DIN, EN, AS, GB

Machining Capability

Maximum Outside Diameter: 2500 mm

Maximum Thickness: 500 mm

Tube Hole Accuracy

Positioning precision: ≤ 0.01 mm

Hole diameter tolerance: ±0.01 mm

Minimum hole surface roughness: Ra 0.6

Expanded tube grooves: Supported (grooved tube holes available)

Manufacturing Process

Forging

Overlay welding

Explosion cladding

Normalizing

Solid solution treatment

Turning

Milling

Drilling

Reaming

Boring

Groove machining

Inspection & Testing

Chemical composition analysis

Mechanical property testing

Penetrant testing (PT)

Ultrasonic testing (UT)

Intergranular corrosion testing

Clad bonding strength test

Hardness inspection

Dimensional inspection

Surface roughness inspection

Typical Tube Hole Patterns

The most common tube hole arrangements include:

Triangular

Rotated triangular

Square

Rotated square

Each hole pattern presents unique drilling and positioning challenges and is selected based on heat transfer efficiency, mechanical strength, and cleaning requirements.

Features

Titanium tube sheets offer exceptional performance in aggressive environments due to the following properties:

1. Low density and high strength

2. Outstanding corrosion resistance in seawater, salt, chlor-alkali, and acidic environments

3. Excellent performance at cryogenic temperatures

4. Good thermal conductivity and thermal stability

Applications

Equipment Applications

Shell-and-tube heat exchangers

Plate heat exchangers

Electroplating equipment

Pressure vessels

Industry Applications

Chemical industry (salt, alkali, acid regeneration)

Medical and pharmaceutical production

Food processing

Polymer production

Pulp and paper industry

Seawater desalination and marine engineering

Material Configuration Options

Depending on the final application-such as petrochemical, nuclear power, oil & gas, or marine engineering-the tube sheet can be:

Fully made from titanium

Titanium-clad with carbon steel

Titanium-clad with stainless steel

Manufactured from stainless steel or superalloys

This flexibility allows optimal performance while controlling material cost.

Summary

Titanium tube sheets combine precision machining, corrosion resistance, and structural reliability, making them indispensable components in modern heat exchangers used in harsh and demanding environments.

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