With the acceleration of global industrialization, the chemical industry has increasingly strict requirements for the performance of pipeline systems. In extreme environments such as high temperature, high pressure and strong corrosion, traditional pipe materials have become difficult to meet the requirements of safety, environmental protection and economy. Titanium reducers, as a new type of pipe connection component, have stood out in the chemical pipeline system with their outstanding corrosion resistance, lightweight design, and excellent fluid transition performance, becoming a "star material" that attracts attention in the industry.
Ⅰ The tolerance of titanium reducers to extreme corrosive environments
Comprehensive corrosion resistance guarantee
The corrosion rate in boiling hydrochloric acid, nitric acid and chlor-alkali media is less than 0.018mm per year, which is more than 15 times better than that of stainless steel. It is especially suitable for the transportation of strong corrosive media such as sulfuric acid and hydrochloric acid.
The surface oxide film can self-repair and has outstanding resistance to pitting corrosion in an environment containing chloride ions, avoiding the risk of local perforation.
Compatibility with special media
The dry chlorine gas environment should maintain a moisture content of ≥0.5%; otherwise, it may cause combustion. The wet chlorine environment is completely stable.
The corrosion rate in organic acids and high-temperature alkaline solutions is controllable, but long-term contact with strong reducing acids (such as concentrated sulfuric acid) should be avoided.
Ⅱ Structural Performance and Lightweight Design
High-pressure load-bearing
The pressure-increasing and scouring part of the cone transition zone is thickened by 20%-30% to resist medium impact.
Lightweight
Density 4.51g/cm³ (57% of steel), reducing the load on the support and installation costs;
High-temperature stability
Long-term applicable temperature ≤300℃, short-term tolerance to 600℃ working conditions.
Ⅲ Long service Life and Economy
Extended service life: Under the same corrosive environment, the service life can reach more than 10 times that of stainless steel pipe fittings, reducing the frequency of replacement.
Low maintenance cost: No anti-corrosion coating required, reducing the frequency of cleaning.
System reliability: 100% passed eddy current testing/radiographic testing to avoid the risk of sudden leakage.
Ⅳ Key Points for Selection and Installation
Material matching principle
Conventional medium: TA2 (Gr2) is preferred as it offers high cost performance.
Hydrochloric acid/reducing acid: TA10 (Gr12, containing molybdenum-nickel alloy) should be used.
Requirements for structural reinforcement
When eccentric reducers are used in horizontal pipelines, the eccentricity should be marked to prevent gas accumulation.
Welding must match the grade (such as TA2 with TA2 pipe) to prevent interfacial corrosion of dissimilar materials.
Mandatory items for surface treatment
Pickling (HF/HNO₃) or electrolytic polishing to ensure the integrity of the passivation film and enhance the corrosion resistance of the weld zone.
Ⅴ Typical chemical application scenarios
Chlor-alkali industry
Reducer connection from electrolytic cell to concentration tower, resistant to dual corrosion of wet chlorine and alkaline solution.
Nitric acid plant
High-temperature (≤200℃) reducer in the concentration section, with a corrosion rate of TA2 material less than 0.1mm per year.
Seawater desalination
The inlet and outlet diameters of the high-pressure pump are changed to resist chloride ion corrosion and seawater erosion.
Design Warning
For strong scouring media, the wall thickness of the cone should be increased additionally, and the flow rate should be controlled to be ≤3m/s.
Titanium reducers have broken through the limitations of traditional pipes through technological innovation, bringing safe, efficient and green solutions to the chemical industry. With the continuous growth of global demand for high-performance materials, their market size and application fields will further expand. In the future, driven by intelligent manufacturing and new material research and development, titanium reducers are expected to become the "standard configuration" of chemical pipeline systems, helping the industry move towards a more sustainable and intelligent direction.
