Welded Titanium Pipe

Welded titanium pipes are made from titanium and titanium alloys through a plate rolling and welding process. They combine the excellent properties of titanium with the efficient production characteristics of welding technology, and are widely used in fields with high corrosion, high temperature, or high strength requirements.

1. Material Properties

• Lightweight and High Strength: Titanium has a low density (about 4.5 g/cm³), but its strength is close to that of steel, making it suitable for lightweight designs.

• Corrosion Resistance: Titanium performs excellently in seawater, chloride, and acidic environments. It can form a protective oxide film, especially in oxidative media.

• High/Low Temperature Resistance: Titanium has a wide working temperature range (-250°C to 600°C), making it suitable for extreme environments.

• Biocompatibility: Pure titanium (e.g., Grade 2) is commonly used in medical implants.

1. Manufacturing Process

• Material Selection: Common grades include pure titanium (Grades 1-4) and titanium alloys (e.g., Grade 5/Ti-6Al-4V).

• Welding Technology:

• TIG/GTAW Welding: Argon gas is used for protection to prevent high-temperature oxidation.

• Laser/Plasma Welding: High precision, used for thin-walled pipes or special requirements.

• Post-Processing: After welding, acid pickling or polishing is necessary to remove the oxide layer and restore corrosion resistance.

• Quality Control: Non-destructive testing (such as X-ray or ultrasound) is conducted in accordance with standards like ASTM B862.

Specification

Application

• Application in seawater desalination

In the past, most of the materials used for condenser tubes in seawater desalination equipment in China were copper alloy tubes, but their corrosion resistance was poor, and with the increase of copper price, the cost also increased significantly. Nowadays, the country is more willing to use welded titanium pipes with higher cost but better corrosion resistance.

• Application in the petrochemical industry
  

In some petrochemical fields, such as coolers used in crude oil refining and P-Xylene production, stainless steel welded pipes are not suitable for use, and pitting corrosion is very likely to occur. welded titanium pipes must be used.

In the chemical industry, many highly corrosive devices can only ensure the normal operation of equipment and reduce maintenance time and frequency by using titanium welded pipes.