Leak Detection for Double Wall Pipe

The Application
Double wall piping is often used to transport hazardous or environmentally unfriendly liquids from one area of a plant to another. The secondary containment pipe provides a degree of safety if the primary pipe leaks.

The Problem
Some means is required to detect a leak in the primary pipe. Space for mounting a detection sensor is limited.

The Solution
Drexelbrook recommended installation of a collection boot in the secondary containment pipe. We then installed a miniature RF point level sensor. The sensor detects the presence of liquid inside the containment pipe and sends an alarm to the control room.

Benefits
• Detects leak in primary containment pipe.
• Reduces unscheduled downtime.
• No routine maintenance required. Install it and forget it.
*Consult factory for higher temperature of pressure.

Other Solutions
• Interface
• Slop Oil Vessels
• Condensate Storage
• High Level
• Low Level
• Overfill Protection

Typical Uses
• Continuous Level
• Point Level
• Waste Management
• Inventory Management
• Overfill Protection
• Regulatory Compliance

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Related products

Magnetrol

Displacer switches – single, dual and tri-switch series

Single-Stage Switches

Series A10 displacer type level measurement units are wide differential units calibrated to actuate as a liquid level reaches a given displacer and to deactuate when the level reaches a second displacer. Single stage, wide differential displacer switches are factory calibrated yet field-adjustable to operate over a wide level differential band.

The minimum differential band is approximately 6 inches (152 mm) in water and varies somewhat with liquid specific gravity. The maximum differential is determined by the length of the displacer suspension cable. Series A15 units are calibrated to operate over a narrow level differential band and are ideally suited for liquid level alarm applications on either high or low level.

Dual-Stage Switches

Series B10 displacer type level measurement units are wide differential tandem switches that are factory calibrated with a choice of several switch operating sequences designed to meet virtually any application.

Series B15 units are narrow differential tandem switches that are factory calibrated. Each switch actuates at a different level.

Tri-Stage Switches

Series C10 displacer type level measurement units utilize three electrically separate control signals in a selected sequence in response to liquid level changes.

Series C15 units are wide differential switches with a choice of several operating sequences combining wide and narrow level differential and are factory calibrated.

Magnetrol

E4 Modulevel® liquid level transmitter

The E4 Modulevel® is a loop powered, two-wire instrument, utilizing simple buoyancy principles to detect and convert liquid level changes into a stable output signal. The linkage between the level sensing element and output electronics provides a purely mechanical design and construction. The vertical in-line design of the transmitter results in low instrument weight and simplified installation. The instrument comes in a variety of configurations and pressure ratings for varied applications.

The E4 Modulevel has microprocessor based electronics with 4–20 mA/HART® digital output. E4 supports the FDT/DTM standard and a PACTware™ PC software package allows for additional configuration, diagnostics and trending capabilities.

Other applications

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