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Different can type installation methods and precautions are as follows.
1 If the atmospheric pressure arch tank is equipped with light oil, it is installed on the tank top with an atmospheric pressure waveguide detector. The installation diagram is as shown in the figure. If there is no agitation in the tank, the end of the waveguide can be directly fixed at the bottom of the tank, or it can be pulled up to the bottom of the tank with iron (50kg). If there is a stirrer, you should first install a straight pipe (diameter Φ100 ~ Φ200) from the top of the tank top 30cm to the bottom of the tank to open two holes above Φl0 and communicate with the tank. Refill the Φ50 waveguide inside.
If heavy oil or crude oil is contained, it can be installed directly on the top of the tank using a normal-pressure antenna type. See figure.
2 Atmospheric Floating Roof Tanks These tanks usually have Φ100~Φ200 measuring tubes. When using radar level meter, the horn antenna detector with the same inner diameter as the measuring tube can be directly installed on the top flange of the tube.
3 Pressure tank with bypass (horizontal, vertical or spherical tank)
Pressure tanks that have been put into use usually have bypass pipes for the installation of glass tube level meters. Instead, radar level gauges can be used to directly mount pressure-proof waveguide detectors on the top of the bypass pipes.
The new pressure tank is equipped with a radar liquid level timer. It is recommended to weld the bypass pipe of Φ150 to Φ200, and it is desirable to keep the bottom of the pipe to the ground (lower than the bottom of the tank) and the top of the tank is more than 0.5m above the tank roof. The advantage of doing so is that calibration and maintenance are easy.
Newly built spherical tanks can also be welded directly on the tank top with a lead pipe 3O~50cm higher. The flanges on the pilot pipe are welded. The ball-cabinet-waveguide type detector is installed on the tank top. In this case, a Φ100 or more welding should be done in advance. The straight pipe reaches the top of the tank, the top welding flange is connected, and the bottom is welded firmly to the bottom of the tank for the purpose of installing radar detectors. The top and bottom of the tube should have 2 to 4 holes of Φ8.
The above types of atmospheric pressure tanks and pressure tanks with pressure less than 0.65 MPa all use 100-6GB9l15, 7-88 standard flanges. When the pressure is greater than 0.6MPa and less than 2.5MPa, a standard flange of 100-25GB9115.10-88 is used.
As can be seen from the above installation methods, in addition to building a new ball tank, the use of radar level meter can achieve non-stop production, no fire installation, extremely simple and convenient.
The secondary level of the radar level gauge should be installed in the instrument box in the control room. The detectors (primary tables) should be installed in floating roof tanks, dome tanks, pressure tanks, by-passes in different structural forms (atmospheric pressure antenna type, atmospheric pressure waveguide type, pressure resistant-waveguide type, ball valve-waveguide type). Cans (vertical, horizontal) and pressure ball cans on top.