Large pipelines of steel gas pipelines and transport pipelines in the chemical industry are essential for energy supply and industrial production. However, these pipelines are also vulnerable to corrosion, especially when they are underground or underwater. Corrosion can lead to problems such as leakage, explosion hazards, environmental damage, or high maintenance costs.

Designing a CP system for large pipelines of steel gas pipelines and transport pipelines in the chemical industry

Designing a cathodic protection system is a complex task that must take many factors into consideration, such as the size, shape, and location of the object, soil conditions, corrosion rate, lifespan, and costs. There are two types of cathodic protection: galvanic and impressed current. In galvanic protection, the object is electrically connected to a sacrificial anode that gradually corrodes away. In impressed current, an external power source is used to lower the potential of the object. In both cases, the required protection current and potential for the object must be calculated or measured. The design of the anodes, power supply, pipelines, and measuring equipment for the cathodic protection system must also comply with applicable standards and regulations.

CP system for the chemical industry

To protect large pipelines from corrosion, cathodic protection can be applied. Impressed current systems are typically used for cathodic protection of large pipelines. This involves using an external power source to lower the potential of the object.

When designing a cathodic protection system for large pipelines, various factors must be considered, such as:

• The length, diameter, and wall thickness of the pipelines
• The coating quality and damage to the coatings of the pipelines
• Soil conditions and soil moisture along the route
• The presence of other metal structures or electrical installations nearby
• Calculating expected lifespan
• Costs and availability of materials and equipment

More than 40 years of experience in designing, supplying, and installing CP systems

Merrem & la Porte has over 40 years of experience in designing, supplying, and installing cathodic protection systems for large pipelines in various sectors such as the oil and gas industry, chemical industry, water sector, and transportation sector. We can advise you on the most suitable type of cathodic protection for your situation and protect your pipeline according to applicable standards and regulations. In addition to design, we also provide maintenance, inspection, and monitoring of your cathodic protection system to ensure optimal performance and lifespan.

Contact

Would you like to learn more about our cathodic protection systems for large pipelines or request a quotation? Please contact us via the contact form.