Pure Titanium Tube Titanium Alloy Tube ASTM B338 Gr 5 Gr7 for Industrial Uses

Product Specification

Payment Terms	L/C, D/A, D/P, T/T, Western Union, MoneyGram	Supply Ability	200-300 Ton/Tons Per Month
Delivery Time	about 15-35 days for delivery	Packaging Details	All goods are packed by seaworth shipment materials or required by buyer
Low Thermal Expansion	Yes	Technology	Cold rolled, Hot rolled
Lead Time	7-10days	Technique	Seamless, Cold Drawn
Drawing	accept customized	Refrigerant	R22,R134a,R407c,R410a R417a
Condition	R M Y	Standrad	ASTM B861/B338
Regular Size	4*8ft/ 4*10ft/ 1500*3000mm	Weldability	Good
Tolerance	Customized	Heatresistance	Good
Materials	Titanium metal or Titanium alloy	Commodity	Titanium tube for Heat exchanger
Package	Standard Export Package	Brand Name	LHTi
Model Number	Titanium Tube	Certification	ISO9001,CE, API,etc
Place of Origin	Baoji, China
High Light	ASTM B338 Titanium Tube ，Gr7 Titanium Alloy Tube ，Industrial Uses Titanium Tube

Pure Titanium Tube Titanium Pipes Titanium Alloy Tube ASTM B338 Gr 5 Gr7 for Industrial Uses

 

Titanium and its alloys have become indispensable materials in various industries, offering a combination of exceptional strength, lightweight properties, and outstanding corrosion resistance. When used in the form of titanium tubes and pipes, they offer unique advantages for a range of industrial applications that require durability and resistance to harsh environments. This article will discuss the key features and uses of pure titanium tubes, titanium pipes, and titanium alloy tubes under ASTM B338 standards, particularly grades Gr5 and Gr7, and explore how they meet the demands of diverse industries.

What is ASTM B338?

ASTM B338 is the standard specification for Titanium and Titanium Alloy Seamless Pipes. This standard defines the requirements for the construction, properties, and performance of titanium pipes used in various industries. The specification covers several grades of titanium alloys, which vary in their composition and characteristics, offering different levels of strength, corrosion resistance, and temperature tolerance.

Understanding Pure Titanium (Grade 2) and Titanium Alloys (Grades Gr5 & Gr7)

Pure Titanium (Grade 2) – Commercially Pure Titanium:

• Grade 2 titanium is the most widely used pure titanium grade. It is often referred to as commercially pure titanium (CP-Ti) due to its high purity. Grade 2 offers a balance of strength, formability, and excellent corrosion resistance, particularly in marine environments and chemical processing.
• Applications: Widely used in marine applications, chemical processing, and medical implants due to its biocompatibility and resistance to corrosion in seawater, acids, and other harsh chemicals.

Grade 5 – Titanium Alloy (Ti-6Al-4V):

• Gr5 is an alloyed titanium containing 6% aluminum and 4% vanadium, offering significantly higher strength than pure titanium. This grade is often referred to as Ti-6Al-4V, one of the most commonly used titanium alloys in the world.
• Properties: High tensile strength and better fatigue resistance make Gr5 ideal for applications where strength, durability, and weight are crucial.
• Applications: Used in aerospace, marine, chemical, and automotive industries for components that must withstand high stress and high temperatures. It is also commonly used for heat exchangers, pressure vessels, and aircraft parts.

Grade 7 – Titanium Alloy with Palladium:

• Gr7 is another titanium alloy, adding palladium to pure titanium, enhancing its resistance to aggressive chemicals and high-temperature environments.
• Properties: Superior corrosion resistance compared to Grade 2, especially against chlorides, sulfuric acid, and other industrial chemicals.
• Applications: Ideal for use in chemical processing, pharmaceutical industries, and environments where corrosive substances are prevalent, such as chemical reactors, heat exchangers, and refining equipment.

 

Benefits of Titanium Tubes and Pipes:

Titanium tubes and pipes, especially those made from Gr2, Gr5, and Gr7, offer several key advantages over traditional materials like stainless steel, carbon steel, and other alloys. These benefits include:

Corrosion Resistance:

• Titanium exhibits outstanding resistance to corrosion in most aggressive environments, including seawater, acidic solutions, and chloride-containing compounds. This property makes it ideal for industries like chemical processing, marine, and offshore drilling.

Strength-to-Weight Ratio:

• Titanium has a superior strength-to-weight ratio, making it a lighter alternative to other metals, especially in applications like aerospace and automotive engineering. This results in cost savings due to reduced weight and improved fuel efficiency.

High Temperature Performance:

• Titanium alloys like Gr5 and Gr20 offer excellent performance under high temperatures, providing creep resistance and the ability to perform in heat exchangers, turbine components, and high-pressure applications.

Biocompatibility:

• Pure titanium (Gr2) and certain titanium alloys (Gr7) are biocompatible, making them ideal for medical implants such as orthopedic devices, dental implants, and surgical tools. The body does not reject titanium, allowing for long-term implantation.

Durability and Longevity:

• Titanium is resistant to wear, fatigue, and corrosion, ensuring that titanium pipes and tubes have a long service life, even in extreme environments. This makes titanium a cost-effective solution over time, reducing the need for replacements and repairs.

 

Applications of Titanium Pipes and Tubes:

Titanium pipes and tubes find widespread use across a variety of industries. Here’s a look at how ASTM B338 Gr5 and Gr7 titanium pipes serve key sectors:

Aerospace:

• Titanium’s lightweight and high-strength properties make it perfect for use in aircraft and spacecraft components, including airframes, wings, and engines. Gr5 is widely used for aircraft parts that need to withstand high stresses and temperatures.

Chemical Processing:

• The corrosion resistance of titanium is highly beneficial in chemical plants that process aggressive substances like sulfuric acid, chlorides, and hydrochloric acid. Gr7 titanium pipes are used in heat exchangers, reactors, and piping systems that require high resistance to aggressive chemicals.

Marine Industry:

• Marine environments are highly corrosive, with seawater and salt exposure putting immense stress on materials. Titanium tubes and pipes, particularly Gr2, offer corrosion resistance in saltwater and are used in shipbuilding, submarine components, and offshore oil platforms.

Medical:

• Titanium’s biocompatibility makes it an ideal choice for medical implants such as hip replacements, knee implants, and dental implants. Its lightweight and strong nature make it comfortable and functional in the human body.

Oil and Gas Industry:

• Titanium’s ability to resist high-pressure and high-temperature environments makes it crucial for offshore drilling and petroleum extraction applications. Gr5 and Gr7 titanium pipes are used in subsea pipelines, wellheads, and heat exchangers.

 

 

 

Chemical Composition of ASME SB338 Ti Gr 2 Seamless Pipe

 

Manufacturing Processes of Titanium Pipes

The manufacturing process of titanium pipes involves several key steps to ensure that the finished product meets the required specifications for strength, corrosion resistance, and other critical characteristics. Titanium pipes are used in various industries, including aerospace, chemical processing, marine, and medical, where high performance and durability are essential. Below is an overview of the typical processes involved in the manufacturing of titanium pipes.

 

Raw Material Preparation

The production of titanium pipes begins with raw titanium metal, which is usually obtained in the form of billets or ingots. These are typically created from titanium sponge (a purified form of titanium) through the Kroll process, which involves reducing titanium tetrachloride with magnesium to produce titanium metal.

• Titanium Sponge is the primary raw material used to produce titanium billets or ingots.
• The ingots are then forged or rolled into the required shape for further processing into pipes.

 

Extrusion or Piercing

Once the titanium material is prepared, the next step is the extrusion or piercing process, which is used to form the initial shape of the pipe.

• Extrusion: This involves forcing heated titanium billets through a die to produce a hollow tube. The process creates a pipe with a uniform thickness and smooth surface. This method is often used for smaller diameter pipes and is suitable for titanium alloys such as Grade 2 (pure titanium), Grade 5 (Ti-6Al-4V), and Grade 7 (with palladium).

• Piercing: If a larger diameter pipe is required, titanium billets can be pierced to create a hollow center, then stretched through a pilger mill or tube mill to reduce the size and thickness to the desired dimensions. Piercing is more common for larger pipes and tubing.

 

Pilgering (Cold Drawing)

After extrusion or piercing, the titanium pipe often undergoes a pilgering process, which is a cold drawing process where the pipe is reduced in diameter and wall thickness while maintaining the overall length. Pilgering is a key step in achieving high-precision dimensions and improving the mechanical properties of the pipe.

• During pilgering, the pipe is pulled through a die and a mandrel to further shape it into the final dimensions. This process also helps to improve the surface finish and enhance the mechanical properties of the material.

• Pilgering can be done at room temperature or elevated temperatures, depending on the desired properties of the pipe.

 

Heat Treatment

Titanium pipes often undergo heat treatment to enhance their strength, ductility, and corrosion resistance. The heat treatment process can involve one or more of the following:

• Annealing: This involves heating the titanium pipes to a specific temperature and then slowly cooling them to relieve internal stresses and improve the material’s workability. Annealing also enhances the ductility of the pipe and helps prevent cracking during further processing.

• Solution Annealing: In some cases, particularly for titanium alloys, pipes are heated to a temperature where the alloying elements become fully dissolved, and the material is rapidly cooled to lock in the desired microstructure.

• Stress Relieving: This process is used to reduce residual stresses that may have developed during previous manufacturing steps, improving the overall integrity of the titanium pipe.

 

Sizing and Straightening

Once the pipe has been extruded, pilgered, and heat-treated, it may undergo further processes to achieve the final dimensions and straightness.

• Sizing: The pipe is passed through a set of dies to fine-tune its outer diameter and wall thickness. This ensures that the titanium pipe meets the exact specifications required for the end use.

• Straightening: After the pipe has been formed and sized, it may have slight bends or curves due to the manufacturing process. Straightening is a process where mechanical or hydraulic force is applied to straighten the pipe and ensure that it has a uniform, straight shape along its entire length.

 

Finishing:

After the pipe has been sized and straightened, it often undergoes several finishing processes to achieve the desired surface quality and appearance:

• Polishing: To remove any surface defects and improve the aesthetic appearance of the titanium pipe, polishing is often performed. The polished surface also helps to enhance the corrosion resistance of the pipe, especially when exposed to harsh environments.

• Beveling: The edges of the titanium pipe may be beveled to allow for easier welding, particularly in applications like chemical processing and aerospace.

 

Surface Treatment: Additional surface treatments such as pickling (acid cleaning), passivation (oxidation treatment), or anodizing (to increase surface thickness and corrosion resistance) may be applied.​ 

 

Quality Control and Testing: Quality control is a critical step in the manufacturing of titanium pipes. Various tests are conducted to ensure the pipes meet industry standards and specifications, such as ASTM B338 for titanium tubes. These tests include:

• Dimensional Inspection: Ensuring that the pipe meets the specified dimensions for diameter, wall thickness, and length.

• Tensile and Yield Strength Testing: To confirm the mechanical strength and durability of the titanium pipes.

• Corrosion Resistance Testing: Ensuring that the titanium pipe can withstand the specific corrosive environments it is designed for.

• X-ray and Ultrasonic Testing: To check for internal defects, such as cracks or inclusions, that could compromise the pipe’s integrity.

 

Packaging and Shipping:

Once the pipes have passed quality control, they are ready for packaging and shipping. Depending on the requirements of the customer, the pipes may be:

• Cut to specific lengths or coiled for easier transportation.
• Wrapped and protected from damage during shipping, especially if the pipes are being transported internationally.

 

Summary of Titanium Pipe Manufacturing Process

1. Raw material preparation: Titanium sponge is processed into billets or ingots.
2. Extrusion or piercing: The billet is extruded or pierced to form a hollow tube.
3. Pilgering (Cold Drawing): The pipe is reduced in size and thickness through cold drawing.
4. Heat treatment: The pipe undergoes annealing or solution annealing to enhance properties.
5. Sizing and straightening: The pipe is resized and straightened to meet specifications.
6. Finishing: Polishing, beveling, and surface treatments improve surface quality.
7. Quality control and testing: Pipes undergo rigorous testing to ensure they meet standards.
8. Packaging and shipping: The pipes are prepared for delivery to customers.

 

The manufacturing of titanium pipes involves a combination of precision machining, heat treatment, and surface finishing techniques that ensure the pipes meet the high standards required for critical applications. This process results in titanium pipes that offer outstanding strength, lightweight properties, and corrosion resistance, making them essential components for industries like aerospace, chemical processing, and marine engineering.

 

Titanium Tube Sizes: