What is the cable material for guided wave radar level gauges?
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I have a question: there is a 31% hydrochloric acid storage tank that is 7 meters in length; the tank body is made of fiberglass. A dual-flange differential pressure level gauge is being used, and it is planned to install a guided wave radar on top of the tank. However, the guided wave cables available are made of 316 material only, which does not possess corrosion resistance. Are there guided wave steel cables made of other materials? Or use a horn-shaped radar level gauge directly? What are the effects of hydrochloric acid mist and corrosion?
There’s also the double-flange differential pressure level gauge; since its height is quite high, at 7M, is it better to use a capillary tube or a pressure transfer tube? Does the capillary need to be fixed or protected in any way?
Waiting online, experts~ Why aren’t you coming out? :lol
Rosemount offers an electronic remote transmission option as a replacement for double flanges. There is a transmitter at the top and bottom; the main gauge and the secondary gauge are connected to each other by cables. The main gauge outputs the differential pressure directly, eliminating the need for capillaries, and installation and insulation are not affected by factors such as temperature. If guided-wave radar is used, there are those with coatings for corrosion resistance, as well as those with flared shapes
1. A double-flange level gauge can be used, without the need for pressure transfer pipes. The flange can have an inner lining to prevent corrosion. 2. A non-contact radar level gauge or ultrasonic level gauge can be used at the top; the antenna should be of an extended type (to reduce the temperature difference between the antenna and the medium), and it should have a lining (coating) to ensure complete separation from the medium and protection against hydrochloric acid mist. A full-bore ball valve is installed below the antenna to facilitate maintenance.
You might as well install a radio frequency admittance level gauge, with the cable lined with PTFE – it’s inexpensive and offers stable performance.
You can buy two radar level gauges for this; are you sure you want to use just one?
The capillary is fine; I have a 15-meter tank, and the values obtained using a capillary with double flanges are not very different from those measured by an overhead level gauge
The cable can be coated with PTFE; do not use contactless radar, as the signal is completely blocked once acid mist appears.
The Rosemount electronic remote level gauge costs over 40,000 – which boss would be willing to spend that much?