Hurry, hurry, hurry! Installation of pressure gauge
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I am making a tank now and I want to know how the pressure gauge on the pressure vessel is installed on the equipment and what type it is. Thank you everyone :)
It should be connected with a pressure gauge seat, and it should be fixed with a screw plug.
Leave a 20mm pipe opening on the container, add a valve, and install the pressure gauge.
Depending on the actual working conditions, the pressure gauge can be connected with a flange or a threaded head. In addition, a valve and a buffer pipe are generally installed in front of the pressure gauge.
Generally there are two methods: 1. Flange the pressure gauge, leaving the pressure gauge nozzle and connecting flange. Then use the flange pressure gauge and connect 2. Thread connection to the pressure gauge, leave the pressure gauge nozzle, thread or weld the pressure nipple, weld the valve, connect the sealing liquid tank, condensation ring, pressure gauge mouth, the thread connection pressure gauge is commonly used is the second type
The current situation is that a single flange is welded to the nozzle. I have never seen the scene, so I don’t know what the actual situation is. Could you please give me some guidance? Thank you :)
Generally speaking, one end is welded to the container with an external wire and the other end is welded to the container. The valve is made of internal wire. Then a U-shaped pressure buffer tube is added. An internal wire joint is installed on the buffer tube, and the pressure gauge is installed on the internal wire joint.
A more formal installation method should be to weld a DN15 pipeline on the container, with the other section of the pipeline having an external thread rib, and then install the lower end of the sealing liquid bag. Most of the sealing liquid bag is filled with medium. The density of the medium has a certain relationship with the density of the medium in the container. Most of them are filled with glycerin. The bottom of the sealing liquid bag has a wire belly for easy filling, and the upper end of the sealing liquid bag is easy to fill. Connect the DN15 pipeline and then install the hand valve. The pipeline behind the hand valve is equipped with a pressure gauge nozzle. Finally, the common method of installing the pressure gauge through the nozzle is to directly connect a DN15 pipeline from the equipment, and then install the hand valve. Install a threaded short-circuit behind the hand valve, short-circuit the other section and weld the pressure gauge nozzle, and the pressure gauge is directly installed on the nozzle..
The current situation is that a single-piece flange is welded to the nozzle. I have never seen the scene and I don’t know what the actual situation is. Please give me some guidance. Thank you. ---------------------------------------------------------------------------------------------------------------- The pressure gauge is installed on the single-piece flange and it is OK.
The question is very vague； The premise is what type of pressure gauge you plan to use, whether it is an elbow type or a diaphragm type. ； The elbow pipe is connected by thread, and the diaphragm is connected by flange.
Make a 100mm long thread head on the top of the container, with internal buckle, G1/2'' pipe thread, then bend the pressure gauge onto the thread head, screw on the buckle on the other side of the bend, screw the pressure gauge onto the buckle, and the pressure gauge is installed.
There is a pressure gauge with flange connection, but when selecting the model, it must be the same as the flange on site before it can be installed.； You can also remove the flange and use a 4-minute nipple to weld directly to the pressure hole, then install a 4-minute needle valve on it, and install a pressure gauge connector on the needle valve (outer 1/2NPT-----inner M20 * 1.5), the outer diameter of the pressure gauge is 100mm or 150mm.
It is best to use flange connection as the instrument connection form on the equipment, especially for pressure vessels, because it involves the pressure test of container sealing. If a flange connection is used, a blind flange can be used to seal during the sealing test, eliminating many restrictions, such as the root valve not arriving, the instrument being damaged by overpressure, etc. Flange connection pressure gauge: The standard specifications of the flange on the equipment should be consistent with the standard specifications of the flange on the pressure gauge to ensure that the flanges are properly connected. ； Then connect a stop valve, add a diameter reducer if needed, and then connect the pressure gauge. The installation materials are provided by the instrument professional. After the pressure test of the equipment is completed, it can be installed according to the installation manual. For specific installation, please refer to HK02 "Pressure Gauge and Pressure Transmitter Pipeline Connection Installation Manual" of HG/T 21518-95 "Automatic Control Installation Manual".
If the process leaves a flange, there are two ways to install it: 1. Directly install a diaphragm pressure gauge (flange connection), but without a root valve. 2. Install a root valve with flanges on the top and bottom. The bottom is connected to the flange reserved for the process, and the top is connected to the diaphragm pressure gauge. 3. Install a root valve with a flange on the bottom and a thread on the top. Install it on the bottom with the process port, and install a threaded pressure gauge on the top. 2. and 3 require different pressure gauges and installation methods to be selected according to different media.
Generally speaking, pressure gauges on pressure vessels are installed using threaded or flange installations, mostly with threaded connections.
It is best to use flange connection as the instrument connection form on the equipment. The dimensions are DN20 and DN25. For the installation method, please refer to HK02 "Pressure Gauge and Pressure Transmitter Pipe Connection Installation Manual" in HG/T 21518-95 "Automatic Control Installation Manual".
A flange has been reserved on the equipment. A flange-type root stop valve should be installed first. The connection form of the pressure gauge should be determined according to the pressure level.