The pressure gauge produced by the general pressure gauge unit is used to fix the instrument connector to the outside of the meter case. The three screws are the three leakage points. We fix the instrument connector inside the meter case to solve the oil leakage of the instrument screw. The problem, there is the instrument cover, I plant the instrument cover to take two seals, the instrument in the cover ring removed, the instrument still does not appear oil leakage, unless the meter cover destroyed, will appear Oil leakage problem, the company's seismic pressure gauge, the inner case of the media added to the case of No. 500 silicone oil, No. 500 characteristics of silicone oil, silicone oil at 150 °C long-term exposure to air is not degenerate, when in contact with oxygen chlorine at 200 °C Oxidation is also slow. Its operating temperature is up to 200°C, the freezing point is -5°C, and its viscosity is relatively large. It has excellent chemical stability and electrical insulating properties, and it can also resist moisture and moisture. Most of the other units choose glycerine or transformer oil, the main reason is that the price factor, because a kilogram of silicone oil 55 yuan, while a kilogram of glycerin and transformer oil only need 10 yuan, a table with a shock-resistant surface 100 needs 0.5 kilograms, use silicone oil The cost is increased, but the chemical stability is good, and the chemical stability of glycerin or transformer oil is not good. Therefore, all of our shock-proof pressure gauges are fully filled with silicone oil and fluorine oil is optional.
Diaphragm pressure instruments are common measuring instruments and are widely used in various fields. It can intuitively display the pressure changes in various process steps, insight into the formation of conditions in the product or medium process, monitor the safety trends in the production process, and build a fast and reliable security guarantee through automatic interlocking or sensing devices. It has played an important role in preventing accidents and ensuring the safety of people and property. It is called the "eyes of safety."
Pressure instruments are common measuring instruments and are widely used in various fields. It can intuitively display the pressure changes in various process steps, insight into the formation of conditions in the product or medium process, monitor the safety trends in the production process, and build a fast and reliable security guarantee through automatic interlocking or sensing devices. It has played an important role in preventing accidents and ensuring the safety of people and property. It is called the "eyes of safety."
However, in actual production and life, pressure gauges have been neglected or used illegally, which brings security risks. The main performance is:
First, the installation configuration is not standardized. The existing procedures and specifications have clearly defined requirements for the configuration, installation, use, maintenance and inspection of pressure gauges. In actual assembly, the number of secondary or multi-table monitoring sites is reduced, the disk diameter and range are not suitable for work requirements, and special instruments are used under flammable, explosive, toxic, and corrosive environments. Feel free to change the specification.
Second, daily use and maintenance do not pay attention. When used, inspections and cleanings are not performed regularly, there are no usage records, and there is a phenomenon that the hands do not return to zero or fluctuate, the explosion-proof hole protective film falls off, the dial corrosion or glass breaks, and the dial does not clean.
Third, the inspection and verification work is not implemented. The general verification period of the pressure gauge is six months. Mandatory testing is a legal measure to ensure the technical performance of pressure gauges is reliable, accurate value transfer, and effective guarantee of safe production. Because some users do not recognize the safety function of the pressure gauge and do not apply for verification in advance, the use of ultra-calibration and periodical use is very serious. In particular, newly purchased pressure gauges must be certified before they can be installed and used, but the test rate for new meters is still high. Very low.
The pressure gauge is too small compared to the production system and the pressure gauge itself does not present any danger. However, with the pressure gauge as the main body, and relying on automatic interlocking devices, sensing devices, and protection devices, the small and delicate perception is the vision, and the bastion of security construction is irreplaceable. "Thousands of miles of the embankment, collapsed in the ant hole." Being contemptuous and neglecting details is a flaw in security. As one of the safety accessories, the pressure gauge not only displays several pressure figures. It uses clever “eyes†to monitor the slightest “leakage†and constantly guards the door to product safety, personal safety, and environmental safety. Especially when used in the production, storage and transportation of flammable, explosive and toxic substances, pressure factors play a key role in preventing catastrophic accidents. The contribution of pressure gauges to safety cannot be underestimated.
It is the responsibility of each safety worker to use a good pressure gauge. First of all, the use of the unit must continue to raise awareness of safety, sense of responsibility, and truly manage the characteristics of the use of good pressure gauges to make it play an "eye" role; Second, the inspection and verification agencies should actively carry out the pressure gauge verification work, downgrade in time , The scrapping check does not meet the pressure gauge of the use requirements to ensure the accurate value and reliable performance. Thirdly, the supervision department must strictly observe the regulations and specifications, supervise the irregularities in the use of pressure gauges, and investigate illegal operations and illegal use according to law. . Let us start from the details, start from the basics, and polish the safe "eyes" to jointly build a strong safety embankment.
Pressure gauges for anti-corrosion measures:
1. If the medium has a detrimental effect on stainless steel and copper, change the buffer tank to an isolation tank and add a corrosion-resistant spacer fluid. The type of septum liquid can be selected according to the nature of the medium to be measured, but it is better to use not less than half a year without deterioration. If common barrier fluids are not suitable, fluorochloric oil can be used as the barrier fluid, but the price is very expensive, so the isolation tank must be made small, and the fluorine oil should be recycled for reuse.
2. Diaphragm pressure gauges can be used. Currently there are molybdenum 2 titanium and tantalum tablets. Membrane and ballistic tube are transported with methyl silicone oil. The minimum range can be 0～100kPa. If the diaphragm material is not resistant to corrosion, You can add a layer of F46 (polyfluoroethylene) film, but the sensitivity of the instrument is reduced. F46 can also be used directly as a diaphragm, but pay attention to the permeability of the medium, the transmission fluid can use fluorine oil, it can play a double isolation.
3. For general corrosive media, if the stainless steel spring tube can withstand 1 to 2 years of corrosion, the ammonia pressure gauge can be selected. When installing, the pressure guiding tube should be short, and the buffer coil tube should be replaced with a buffer tank to prevent impurity plugging.
Diaphragm pressure instruments are common measuring instruments and are widely used in various fields. It can intuitively display the pressure changes in various process steps, insight into the formation of conditions in the product or medium process, monitor the safety trends in the production process, and build a fast and reliable security guarantee through automatic interlocking or sensing devices. It has played an important role in preventing accidents and ensuring the safety of people and property. It is called the "eyes of safety."
Pressure instruments are common measuring instruments and are widely used in various fields. It can intuitively display the pressure changes in various process steps, insight into the formation of conditions in the product or medium process, monitor the safety trends in the production process, and build a fast and reliable security guarantee through automatic interlocking or sensing devices. It has played an important role in preventing accidents and ensuring the safety of people and property. It is called the "eyes of safety."
However, in actual production and life, pressure gauges have been neglected or used illegally, which brings security risks. The main performance is:
First, the installation configuration is not standardized. The existing procedures and specifications have clearly defined requirements for the configuration, installation, use, maintenance and inspection of pressure gauges. In actual assembly, the number of secondary or multi-table monitoring sites is reduced, the disk diameter and range are not suitable for work requirements, and special instruments are used under flammable, explosive, toxic, and corrosive environments. Feel free to change the specification.
Second, daily use and maintenance do not pay attention. When used, inspections and cleanings are not performed regularly, there are no usage records, and there is a phenomenon that the hands do not return to zero or fluctuate, the explosion-proof hole protective film falls off, the dial corrosion or glass breaks, and the dial does not clean.
Third, the inspection and verification work is not implemented. The general verification period of the pressure gauge is six months. Mandatory testing is a legal measure to ensure the technical performance of pressure gauges is reliable, accurate value transfer, and effective guarantee of safe production. Because some users do not recognize the safety function of the pressure gauge and do not apply for verification in advance, the use of ultra-calibration and periodical use is very serious. In particular, newly purchased pressure gauges must be certified before they can be installed and used, but the test rate for new meters is still high. Very low.
The pressure gauge is too small compared to the production system and the pressure gauge itself does not present any danger. However, with the pressure gauge as the main body, and relying on automatic interlocking devices, sensing devices, and protection devices, the small and delicate perception is the vision, and the bastion of security construction is irreplaceable. "Thousands of miles of the embankment, collapsed in the ant hole." Being contemptuous and neglecting details is a flaw in security. As one of the safety accessories, the pressure gauge not only displays several pressure figures. It uses clever “eyes†to monitor the slightest “leakage†and constantly guards the door to product safety, personal safety, and environmental safety. Especially when used in the production, storage and transportation of flammable, explosive and toxic substances, pressure factors play a key role in preventing catastrophic accidents. The contribution of pressure gauges to safety cannot be underestimated.
It is the responsibility of each safety worker to use a good pressure gauge. First of all, the use of the unit must continue to raise awareness of safety, sense of responsibility, and truly manage the characteristics of the use of good pressure gauges to make it play an "eye" role; Second, the inspection and verification agencies should actively carry out the pressure gauge verification work, downgrade in time , The scrapping check does not meet the pressure gauge of the use requirements to ensure the accurate value and reliable performance. Thirdly, the supervision department must strictly observe the regulations and specifications, supervise the irregularities in the use of pressure gauges, and investigate illegal operations and illegal use according to law. . Let us start from the details, start from the basics, and polish the safe "eyes" to jointly build a strong safety embankment.
Pressure gauges for anti-corrosion measures:
1. If the medium has a detrimental effect on stainless steel and copper, change the buffer tank to an isolation tank and add a corrosion-resistant spacer fluid. The type of septum liquid can be selected according to the nature of the medium to be measured, but it is better to use not less than half a year without deterioration. If common barrier fluids are not suitable, fluorochloric oil can be used as the barrier fluid, but the price is very expensive, so the isolation tank must be made small, and the fluorine oil should be recycled for reuse.
2. Diaphragm pressure gauges can be used. Currently there are molybdenum 2 titanium and tantalum tablets. Membrane and ballistic tube are transported with methyl silicone oil. The minimum range can be 0～100kPa. If the diaphragm material is not resistant to corrosion, You can add a layer of F46 (polyfluoroethylene) film, but the sensitivity of the instrument is reduced. F46 can also be used directly as a diaphragm, but pay attention to the permeability of the medium, the transmission fluid can use fluorine oil, it can play a double isolation.
3. For general corrosive media, if the stainless steel spring tube can withstand 1 to 2 years of corrosion, the ammonia pressure gauge can be selected. When installing, the pressure guiding tube should be short, and the buffer coil tube should be replaced with a buffer tank to prevent impurity plugging.
STAINLESS STEEL Aws E308-16 Welding Electrodes
DESCRIPTION:
AWS E308-16 weld metal(19Cr-9Ni) is austenite structure, it has excellent mechanical properties and shows good resistance to intergranular corrosion.
It can be used for all position welding with excellent performances: Stable arc, small spatters, good appearance of weld. And also the welding electrodes shows arc, small spatters, good appearance of weld. And also the welding electrodes shows good heat-resistance character, not easy to turn red and gas porosity is not produced.
Application:
It can be used for welding 18Cr-8Ni(A1S1304),A1S1301, SUS308.etc.
Attention:
Before welding, the welding electrodes should be baked at the temperature of 300-350 ℃ for one hour.
Using stainless steel brush to clean the weld seam, in order to avoid scrap iron entering and affect its quality.
Notes on usage:
1. Clean up the contaminations on the base metal groove and pass to pass
To pass with stainless steel brush.
2.Maintaining short arc length as possible is highly recommend.
While welding with weave method, moving range should be
Controlled within 2.5 times of the wire`s dia.
2. Dry the electrodes at 250-300 ℃ for 60 minutes before use.
Take out consumables for half day consumption and keep in the enviroment
At 100-150 ℃ during welding process.
3. Use lower current to prevent from cracking and minimize base metal dilution.
AWS E308-16 Welding Electrodes
Aws E308-16 Welding Electrodes,308-16 Welding Electrode,308-16 Welding Rod,E308-16 Welding Electrodes
Dingzhou Jinlong Metal Production Co., Ltd. , http://www.weldingelectrodefactory.com