What Are the Best Liner Materials for Methanol Regeneration System Pipework?

In summary, the conversation discusses issues with internal pipe corrosion in a Methanol Regeneration System and the proposal to upgrade the pipes. The pipes are designed to hold hot methanol and water under specific temperature, pressure, acidity, and chloride levels. The process treatment includes oxygen scavenger, scale inhibitor, corrosion inhibitor, and defoamer. Anomalies such as weld root corrosion, pitting corrosion, and synergistic effect of erosion/corrosion have been detected. The individual asks for feedback on using internal liner or lining material for similar applications.
  • #1
g0ggs123
22
0
Does anyone have any experience with liner material for application on pipework with internal corrosion/erosion in a Methanol Regeneration System?

There are issues with internal pipe corrosion in a Methanol processing systems I am dealing with.

To alleviate the current high rates it has been proposed that the pipe work be upgraded.

The pipes are designed to hold hot methanol and water in both liquid and vapour form.

Normal operating conditions for the pipes:

Temperature
• Average temp - 172F
• Max temp - 267.1F

Pressure
• Average internal pipe pressure - 5.4 PSIG
• Max internal pipe pressure - 15 PSIG

Acidity level
• pH level of ~3.5-5.5

Chloride level
• 90000 – 120000ppm

Fines of up to 40 microns collect in the system and circulate the pipe work within the liquid which has a max flow rate of 200USPGM.

Process treatment in the pipes consists of:

1) Oxygen Scavenger
2) Scale Inhibitor
3) Corrosion Inhibitor
4) Defoamer

Failure mechanisms/ Anomalies detected include:

• Weld root corrosion
• Pitting corrosion
• Synergistic effect of erosion/corrosion


If anyone has experience with using an internal liner or lining material with applications similar to the above any feedback would be much appreciated.
 
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  • #2
thanks all for your input
 
  • #3


I have extensive experience with materials and their applications in various industries. In regards to your question about internal liner material for pipework in a Methanol Regeneration System, I would recommend considering materials that have high resistance to both corrosion and erosion. Some potential options could include ceramic coatings, such as alumina or zirconia, as well as high-performance polymer coatings, such as polyurethane or epoxy.

Additionally, it is important to consider the operating conditions of the pipes, such as temperature, pressure, acidity, and chloride levels, as these can affect the performance of the liner material. It may also be beneficial to conduct a thorough analysis of the failure mechanisms and anomalies detected in order to select a liner material that can effectively address these issues.

Furthermore, the use of a multi-layered approach, such as combining a corrosion inhibitor with a wear-resistant coating, may provide better protection against corrosion and erosion. It is also important to regularly monitor and maintain the pipes, as well as properly select and apply the liner material, in order to ensure its effectiveness and longevity.

In summary, selecting the appropriate internal liner material for your specific application is crucial in mitigating the effects of corrosion and erosion in your Methanol Regeneration System. I recommend consulting with a materials specialist or conducting further research to determine the best solution for your system.
 

FAQ: What Are the Best Liner Materials for Methanol Regeneration System Pipework?

What is internal liner material?

Internal liner material is a type of material that is placed on the inside of a container or structure to protect it from damage or contamination. It is commonly used in industries such as food and beverage, pharmaceuticals, and construction.

What are the common types of internal liner material?

The most common types of internal liner material include polyethylene, polypropylene, polyvinyl chloride (PVC), and polyethylene terephthalate (PET). These materials are known for their durability, flexibility, and resistance to chemicals and moisture.

How is internal liner material installed?

Internal liner material is typically installed by adhering it to the inside of a container or structure using adhesives or heat sealing. The specific installation method will depend on the type of material and the surface it is being applied to.

What are the benefits of using internal liner material?

Internal liner material offers several benefits, including protecting the contents of a container from contamination, preventing leaks and spills, and extending the lifespan of the container or structure. It also provides a barrier against moisture, chemicals, and pests.

Can internal liner material be recycled?

Yes, many types of internal liner material can be recycled, including polyethylene, polypropylene, and PET. However, it is important to check with your local recycling facilities to ensure that they accept these materials and follow proper recycling guidelines.

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