What Do You Need To Know About Titanium Flanges?
Non-ferrous titanium or titanium alloy helps craft Titanium flanges. A pipe-connecting part attaches to the pipe end and is replete with a series of holes for secure attachment through bolts. Gaskets are positioned between the two titanium flanges for proper sealing.
The titanium flanges are combined with lugs or adapters. Each is either cast, threaded, or welded alongside a gasket and several bolts and nuts. After fastening the nuts, a specified pressure deforms the gasket and fills any imperfections on the seal to create a tight bond, maximizing the flange's weight capacity.
Titanium flanges are critical components in various industrial applications, particularly in sectors like aerospace, automotive, chemical processing, and marine engineering. Known for their strength, lightweight nature, and excellent corrosion resistance, titanium flanges play a vital role in ensuring the integrity and durability of piping systems. This article will explore the essential aspects of titanium flanges, including their properties, types, applications, and advantages, as well as some considerations for selection and maintenance.
Properties Of Titanium Flanges
Titanium is a remarkable metal that possesses several unique properties that make it an ideal choice for flanges. One of its most notable features is its high strength-to-weight ratio. Titanium is approximately 45% lighter than steel while being just as strong, which is advantageous in applications where weight savings are crucial, such as aerospace and automotive industries.
Another critical property of titanium is its excellent corrosion resistance. Titanium exhibits remarkable resistance to a wide range of corrosive environments, including chlorides, acids, and alkaline solutions. This makes titanium flanges especially valuable in chemical processing and marine applications, where exposure to harsh environments is common. Additionally, titanium forms a protective oxide layer that enhances its resistance to corrosion, ensuring longevity and reliability in various applications.
Titanium also demonstrates good thermal and electrical conductivity, although it is not as conductive as metals like copper or aluminum. However, its thermal properties allow it to perform well in high-temperature environments, making it suitable for applications in power generation and aerospace.
Types Of Titanium Flanges
Titanium flanges come in various types, each designed for specific applications and requirements. The most common types include:
Weld Neck Flanges: These flanges feature a long tapered neck that allows for strong welding connections. They are ideal for high-pressure applications and are commonly used in oil and gas pipelines.
Slip-On Flanges: Designed to slip over the end of a pipe, these flanges are easier to install and are typically used in lower-pressure applications. They provide a reliable sealing surface, making them suitable for various industries.
Blind Flanges: Used to seal the end of a piping system, blind flanges are essential for closing off pipelines. They prevent the flow of fluids and gases, providing a secure closure.
Socket Weld Flanges: These flanges are designed for small-diameter pipes and feature a socket for the pipe to be inserted. They offer a strong connection and are often used in high-pressure applications.
Threaded Flanges: With internal threads, these flanges can be screwed onto the pipe without welding. They are useful in situations where welding is not feasible and are often used in low-pressure applications.
Applications Of Titanium Flanges
Titanium flanges are utilized across a wide range of industries due to their unique properties. Some of the primary applications include:
Aerospace: In aerospace engineering, titanium flanges are used in fuel and hydraulic systems, where weight savings and corrosion resistance are critical. Their ability to withstand high temperatures and pressures makes them suitable for aircraft components.
Chemical Processing: The chemical industry frequently employs titanium flanges in systems that handle corrosive substances. Their resistance to various chemicals ensures safe and efficient operation.
Marine Engineering: Titanium flanges are ideal for marine applications due to their resistance to seawater corrosion. They are commonly found in shipbuilding, offshore platforms, and other marine structures.
Medical Devices: In the medical field, titanium's biocompatibility makes it a preferred choice for surgical implants and instruments. Titanium flanges can be found in various medical applications where strength and corrosion resistance are essential.
Advantages Of Titanium Flanges
The use of titanium flanges offers numerous advantages that contribute to their popularity in various applications:
Corrosion Resistance: As mentioned earlier, titanium flanges exhibit exceptional resistance to corrosion, extending their service life and reducing maintenance costs.
Lightweight: The lightweight nature of titanium flanges allows for easier handling and installation, making them ideal for applications where weight is a critical factor.
Strength: Titanium's high strength ensures that flanges can withstand demanding conditions, including high pressures and temperatures, without compromising performance.
Versatility: With various types available, titanium flanges can be tailored to meet the specific needs of different applications, enhancing their usability across industries.
Low Maintenance: The durability and corrosion resistance of titanium flanges result in lower maintenance requirements, reducing operational costs over time.
Considerations For Selection And Maintenance
When selecting titanium flanges, several factors should be considered:
Application Requirements: Understand the specific demands of your application, including pressure, temperature, and chemical exposure. This information will guide you in choosing the right type of flange.
Material Specifications: Ensure that the titanium grade used for the flanges meets the necessary industry standards. Common grades include Grade 2 (commercially pure titanium) and Grade 5 (Ti-6Al-4V), each with different properties suited for various applications.
Compatibility: Check the compatibility of titanium flanges with other materials in your piping system to prevent galvanic corrosion.
Installation Practices: Proper installation is crucial for the performance of titanium flanges. Follow industry best practices to ensure secure connections and optimal performance.
In terms of maintenance, regular inspections are essential to identify any signs of wear or damage. Although titanium flanges are low-maintenance, ensuring that the sealing surfaces remain clean and free of contaminants will help maintain their integrity.
Different Types Of Titanium Flanges – An Overview
Titanium Weld Neck Flange
Titanium weld neck flanges have a distinct advantage over other types, with their tapered hub and seamless transition from flange thickness to pipe wall thickness. This design ensures excellent deformation resistance and makes them the perfect choice for systems exposed to high pressure, temperature changes, and hazardous substances. The downside to titanium weld neck flanges is their large size, complex assembly, and cost. Furthermore, they are susceptible to damage during transport.
Titanium Slip On Flange
The Titanium Slip On Flange is a flange that fits over the end of a steel pipe and is welded in place as it slides onto the pipe. This process creates a low hub that can be welded from the inside and outside, granting the flange great strength with no leaks. Slip-on Flanges can be attached easily to various types of piping and are optimal for applications involving lower pressure.
What Are Flange Dims For Slip-On Types?
Slip-On Flanges come in a range of sizes and pressure classes, with standard outer diameters of 1/2", 2", 3", 4", 6", 8", 10", 12" up to 24" and special sizes up to 60". Their pressure classes range from 2.5 PN to 250 PN, covering classes from 150 to 2500 (# or LB).
The major benefits of this flange are the convenience for welding or processing as it can be used with materials like plastic and glass steel pipes, and also in terms of construction as the flange bolt hole can be easily aligned and helps prevent any replacement needs for the titanium equipment flange. It can help reduce expenses when a high price is in place, as the titanium flange with the same material can be expensive.
Titanium Threaded Flange
Titanium-threaded flanges are employed in exceptional circumstances because they can be fastened to a pipeline without welding. These titanium flanges are used in high-pressure systems with small diameter pipes, and the bigger the titanium flange is, the more challenging it is to form a thread. This distinct flange type is more convenient to install and maintain than titanium flat welding and butt-welding flanges and can be used in pipelines that do not permit welding on-site.
Titanium Blind Flange
Made of titanium, the blind flange is an often-used pipe flange distinguished by its lack of a bore in the center. Primarily utilized to cap off pipelines, this flange allows easy access to the line once sealed. With the ability to be machined, it is possible to fit a standard-sized pipe to which a threaded or welded downsize is connected.
Titanium Spectacle Flange
A titanium spectacle blind, or a figure-8 blind, is usually a cut-out of metal crafted to fit between two titanium pipe flanges. This item is typically sandwiched between two gaskets and made up of two metal discs connected with a piece of steel. The unique shape of the spectacle blind is said to be reminiscent of a pair of glasses, giving the blind its distinct name.
Titanium Integral Flange
The Titanium Integral Flange, or Titanium Long Weld Neck Flange (LWN Flange), is a high-pressure application solution. This flange features an integral hub with a weld neck far from the ring to minimize bending and welding stress concentration risk.
Titanium Orifice Flange
These flanges are nearly identical to titanium weld neck and slip-on flanges. However, they come with either raised faces or RTJ (Ring Type Joint) facings. They feature additional machining in radial tapped holes for meter connections and orifice plate carriers for fitting the meters. Orifice meters rely on titanium orifice flanges to measure the flow rate of liquids or gases in a pipeline.
Titanium Socket Weld Flange
A titanium socket weld flange has a distinctive inner bore which permits a better stream of fluid accomplished through precise welding and grinding techniques. Developed initially for smaller-sized pipes that necessitate greater pressure, these flanges are known for creating a smoother bore.
Titanium Plate Flange
Constructing junctions, tees, and joints is made possible through a titanium plate flange, a flat circular disk welded to the end of a steel pipe. When two titanium flanges are joined, they are secured with a gasket and bolts through the surrounding holes. Typically used for water and fuel pipelines, these plates are invaluable.
Titanium Non-Standard Flange
Titanium flange Pressure-Temperature Class (Service Rating)
Titanium flanges are rated by their pressure-temperature characteristics, categorized as 150#, 300#, 400#, 600#, 900#, 1500#, and 2500#. Flanges of 24″ to 60″ diameter can support a 900# rating. This translates to the maximum operating pressure of the bar and temperature of degrees Celsius.
A heavier flange allows for a higher pressure-temperature rating, with an inverse relationship between temperature and pressure. Note that different materials have different pressure tolerances.
Titanium Flange Facing Types
Titanium flange facing has five distinct types: flat face, raised face, ring joint, tongue and groove, and male and female.
Material Used In Titanium Flanges
ASTM International standard on titanium and titanium alloy seamless pipe includes alloys such as Grades 5, 23, 24, 25, 29, 35, and 36, which can be supplied as annealed or aged, cold-worked and stress-relieved or annealed, transformed-beta condition, and solution-treated or solution-treated and aged, respectively.
The unalloyed grades, ranging from 1 to 4, are classified as commercially pure or "CP." These grades usually feature higher tensile and yield strength with the increase in grade numbers, the difference in their physical properties mainly results from the interstitial elements, which makes them applicable in corrosion-resistance tasks.
Grade 5, often referred to as Ti6Al4V, Ti-6Al-4V, or Ti 6-4, has 5% aluminum and 2.5% tin, making it ideal for aircraft and jet engines because of its superior weldability, strength, and stability under high temperatures.
Standards For Titanium Flanges
AFNOR NF E29-200-1
ASME ANSI B16.5,
AWWA C207
BS1560, BS 4504, BS 10.
ISO7005-1
MSS SP 44
AS2129
CSA Z245.12
DIN2573, DIN2576, DIN2501, DIN2502.
EN1092-1, EN1759-1.
JIS B2220
UNI 2276. UNI 2277.UNI 2278.UNI 6089.UNI 6090
Conclusion
Titanium flanges have numerous uses, starting from natural gas production to marine shipbuilding, paper manufacturing, metallurgical processing, electricity generation, boiler work, and beyond.