Protection system for pipelines

US20250270708A1Pending Publication Date: 2025-08-28DEHN SOHNE GMBH CO KG
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Patent Information

Application Number
US18/859420
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Priority Date
2022-04-25
Filing Date
2023-02-23
Publication Date
2025-08-28

AI Technical Summary

Technical Problem

Existing cathodic corrosion protection systems face challenges in accurately measuring the IR-free potential due to interference from decouplers and induced AC voltages, which can lead to distorted measurements and potentially dangerous touch voltages.

Method used

A protection system with a decoupler containing multiple capacitors that switch between modes, ensuring reliable cathodic protection potential measurement by disconnecting the rectifier during measurement and using capacitors with different potentials to minimize equalizing currents and limit AC voltages.

Benefits of technology

Enables accurate measurement of cathodic protection potential while effectively dissipating AC voltages, preventing corrosion and ensuring safe handling of pipes by minimizing interference and equalizing currents.

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Abstract

A protection system (10) for pipes (12) comprises a cathodic corrosion protection system (18) which comprises a rectifier (22) and a corrosion protection switching element (24) which is electrically conductively connected to the rectifier (22), wherein the cathodic corrosion protection system (18) is set up to switch between a corrosion protection mode and a measuring mode, wherein the rectifier (22) is not connected in the measuring mode. The protection system (10) also includes a decoupler (18) which comprises a first capacitor (28) and a second capacitor (30) and a capacitor switching element (32). The capacitor switching element (32) is electrically conductively connected to the first capacitor (28) in a first switch position when the cathodic corrosion protection system (18) is in the corrosion protection mode. In a second switch position, the capacitor switching element (32) is electrically conductively connected to the second capacitor (30) when the cathodic corrosion protection system (18) is in the measuring mode.Furthermore, the use of such a protection system is specified.
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