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Introduction

Titanium is used in chemical processing equipment where corrosion resistance, mechanical performance, and long-term service reliability are important.

Typical applications include heat exchangers, vessels, piping components, evaporators, and selected process equipment.

However, titanium is not suitable for every chemical process. Its performance depends on the chemical medium, concentration, temperature, contamination, and equipment design.

This guide explains how titanium is selected for chemical-processing applications and what buyers should consider before specifying a material.

1. Why Chemical Plants Use Titanium

Titanium forms a stable passive oxide film that provides corrosion protection in many industrial environments.

Its advantages may include:

These advantages can make titanium attractive for equipment exposed to demanding process conditions.

2. Common Equipment Applications

Heat Exchangers

Titanium tubes and plates may be used in heat-exchanger systems where corrosion resistance is required.

The appropriate product standard depends on the equipment design and product form.

Process Vessels and Tanks

Titanium plate can be fabricated into selected tanks, vessels, and process equipment.

Design must consider pressure, temperature, thickness, forming, welding, and applicable pressure-equipment codes.

Piping Systems

Titanium pipes, fittings, flanges, and fabricated connections may be used in suitable process services.

The material standard for each component should be confirmed individually.

Evaporators and Process Equipment

Titanium may be considered for evaporators and selected equipment where corrosion performance is important.

The process chemistry must be reviewed before specifying a grade.

3. Selecting the Correct Titanium Grade

Different grades serve different engineering purposes.

| Grade | General Consideration | |---|---| | Grade 1 | High ductility and selected corrosion-resistant applications | | Grade 2 | General-purpose commercially pure titanium | | Grade 7 | Selected reducing-acid environments | | Grade 12 | Selected chemical environments requiring alloy modification | | Grade 5 | High-strength structural or mechanical components |

This table is not a corrosion-resistance ranking.

Grade selection must be based on the actual process medium and design requirements.

4. Why Process Conditions Matter

A material that performs well in one chemical solution may not perform equally well in another.

Important variables include:

The full operating cycle should be considered, not just normal operation.

5. Fabrication and Welding

Titanium equipment requires careful fabrication controls.

Surface contamination can affect material performance and weld quality.

Important considerations include:

The fabrication route should be selected according to the material grade, thickness, component geometry, and service requirements.

6. Standards and Product Forms

Common ASTM standards include:

| Standard | General Product Scope | |---|---| | ASTM B265 | Strip, sheet, and plate | | ASTM B338 | Condenser and heat-exchanger tubes | | ASTM B348 | Bars and billets | | ASTM B381 | Forgings | | ASTM B861 | Seamless titanium pipe | | ASTM B862 | Welded titanium pipe |

The applicable standard and edition must be confirmed for each product.

A plate standard should not be used as a substitute for a tube, pipe, bar, or forging standard.

7. What Buyers Should Provide

For a chemical equipment inquiry, provide:

  1. Process fluid and composition.
  2. Concentration and temperature.
  3. Operating pressure.
  4. Product form.
  5. Required grade.
  6. Dimensions and tolerances.
  7. Applicable design code and material standard.
  8. Welding and fabrication requirements.
  9. Testing and documentation.
  10. Quantity and delivery schedule.

If the material grade has not yet been selected, process information is essential for technical review.

Frequently Asked Questions

Is titanium suitable for chemical processing?

It is used in many chemical-processing applications, but suitability depends on the exact medium and operating conditions.

Which titanium grade is best for chemical equipment?

There is no single best grade for every chemical process. Grade 2, Grade 7, Grade 12, and other materials may be considered depending on service conditions.

Can titanium be welded into process vessels?

Yes. Titanium can be welded using suitable procedures and contamination controls. The design code and project specification determine the required qualification and inspection.

Can ASTM B265 be used for all titanium equipment?

No. ASTM B265 covers titanium and titanium alloy strip, sheet, and plate. Other product forms have different standards.

Conclusion

Titanium can provide valuable corrosion-resistant material solutions for chemical processing equipment.

The key to successful selection is understanding the actual process environment and matching it with the correct titanium grade, product form, fabrication route, and specification.

Discuss Your Chemical Processing Project

Feinuotai supplies titanium materials and coordinates processing solutions for industrial equipment requirements.

For a technical inquiry, please provide process conditions, product form, dimensions, quantity, applicable standards, and documentation requirements.

Internal Link Suggestions

References

  1. ASTM International, Titanium Standards.

https://regional.astm.org/industry/metals

  1. ASTM International, ASTM B265.

https://store.astm.org/standards/b265

  1. ASTM International, ASTM B338.

https://store.astm.org/standards/b338

  1. ASM International, Titanium: A Technical Guide.

https://www.asminternational.org/