CRA (Corrosion Resistant Alloy) Clad Pipe – The Ultimate FAQ Guide
CRA clad pipes are among the many different materials used in the chemical industry. Not just that, you can also use them in high corrosion and oxidation areas, too.
It is important that you know everything about CRA clad pipes. Today, we’ll discuss things that revolve around Corrosion Resistant Alloy (CRA) clad pipes; also about other things related to it.
Without further ado, let’s jump straight right on!
What Does the Term CRA Mean?
CRA is short for what’s called a corrosion resistant alloy.
They’re special alloys you can use to buff machines and equipment, enhancing corrosion resistance and strength.
Common Types of Corrosion
In case you’re not aware, there area actually different types of corrosion, they include:
- High Temperature Corrosion (Oxidation)
- Atmospheric Corrosion
- Galvanic Corrosion
- Pitting Corrosion
- Crevice Corrosion
Corrosion Resistant Alloys (CRA) Examples
It’s not just one product – in fact, there are many examples of corrosion resistant alloys.
The most common corrosion resistant alloy families include:
Copper-Based Alloys
Alloys that are copper based have exemplary quality electrical and thermal conductivity.
You can use them in salt water, water, air, as well as within an environment where inorganic chemicals are present.
Nickel Based
Nickel based alloys perform well when it comes to corrosion resistance. You can use them in fresh water, caustic alkalis, in the normal atmosphere, and so on!
Stainless Steel
The most common type of corrosion resistant alloys, it creates a level of oxide that heals itself.
What’s a CRA Clad Pipe?
It’s a steel pipe that’s been cladded with CRA material. They’re combined either through metallurgical or mechanical bonding.
You’ll find use for it if you’re in an industry prone to corrosion and rust.
Oftentimes, CRA clad pipes are used in the Oil & Gas industry, the Chemical industry, Pipeline transport, Marine industry, Natural Gas industry, and so on.
CRA Materials: What Are They?
CRA materials are materials that have high levels and degrees of resistance to corrosion.
They’re the ones you add to parts and components to improve its resistance properties.
How is a CRA Clad Pipe Manufactured and Created?
How is a CRA clad pipe created, you ask? Well, the process in which CRA clad pipes are created isn’t actually complex.
In fact, it can be bonded through many different processes such as:
- Coextrusion
- Explosion Bonding
- Hot Rolling
- Weld Overlay
- Powder Metallurgy
- And Many More
You can make or create CRA clad pipes by using processes that produce a metallurgical bond.
Process of CRA Clad Pipe Manufacturing
Whatever bonding or fusion process it may be, it’ll always follow this particular structure:
- Preparation of the pipe to be cladded
- Grit blasting of the inside of the pipe
- Application of corrosion resistant materials
- Fusion of the CRA material to the pipe
This is the entire process of creating or manufacturing a CRA clad pipe. It’s not complicated as how it looks like. However, it’s a long process because it needs to make sure that the process was successful.
What’s the Difference Between Lining and Cladding?
Many people get confused in discussing the two. When in reality, it’s actually easy to determine!
Both are processes to improve and enhance a pipe; but they’re quite distinctively different.
Pipe cladding is a metallurgical bonding process between cladding material and the pipe. Pipe lining, on the other hand, is the mechanical bonding process of the material to the pipe.
You would want to apply cladding if you want a corrosion resistant pipe. Lining, if you want an abrasion resistant pipe.
They’re two fusion methods with different goals and objectives.
CRA Clad Pipe Welding
CRA clad pipe welding is a fusion process you can use to deposit CRA material to a pipe.
It’s one of the many techniques to fuse and combine CRA materials to parts and components.
How are CRA Clad Pipes Tested and Inspected?
There are many different tests you can do to measure the effectiveness of CRA clad pipes.
Some of which include:
- Fracture Toughness Tests
- Flattening Tests
- Residual Magnetism
- Ultrasonic Inspection
- Guided Bend Tests
- CRA Liner and Cladding Bond Strength Tests
- Tensile Tests
- And Many More
Different tests and assessments measure different results.
What is Non-Destructive Test (NDT)?
It’s a type of testing process that carefully analyzes a certain material’s properties.
You can find and distinguish it as it is the last step of a manufacturing process.
Before it gets delivered, it needs to undergo the NDT first.
Why Should You Use a CRA Clad Pipe?
If you are in the chemical industry, or any other industry prone to corrosion, you can use CRA clad pipes to:
- Prevent easy corrosion to your pipes
- Prolong and lengthen the lives of your pipes
- Save money from frequent purchasing of piping and tubing
- And many more
What’s the Main Advantage Can You Get From Using a CRA Clad Pipe?
The main purpose of a CRA clad pipe is to prevent corrosion from occurring.
The properties of CRA materials make this easy, allowing your pipes to stay healthy and free from corrosion. Aside from that, other benefits you can get from it include:
- Better productivity
- Less damages of your pipes
- Faster operations
- Healthier working environment
- Stronger and much more reinforced pipes
- And so on
Where Can You Get CRA Clad Pipes?
You can purchase CRA clad pipes from a lot of companies all across the globe. However, you can get the best ones here in China.
When it comes to producing CRA lines pipes, no other company is better than us here at Halden. We offer state-of-the-art CRA cladded pipes to our clientele.
Whatever industry you might be in, you can bank on us to help you.
Work with us and get a free sample of the products you need!
