Secondly, the stove must be correctly selected. Different gas is suitable for different stoves. The difference in the pore diameter of the corresponding stove plate of the liquefied gas, biogas, city gas and natural gas is very large. The pressure of the liquefied gas is higher than that of the city gas and natural gas pipelines. The pressure is large. In order to be able to fully burn, the diameter of the gas hole of the liquefied gas furnace disk is small, and the pressure of the biogas pipe is the smallest, so the diameter of the gas hole is thicker. If the selection is wrong, there will be a mismatch that cannot be fully burned, black smoke cannot be adjusted, the flames are insufficiently supplied with gas, and even the wheezing cannot be ignited. Accidents are prone to occur. It is not allowed to use expired, untested, deformed, refurbished liquefied gas tanks. Always check whether the pressure reducing valve is normal and easy to use.
Third, pay attention to the following when using gas:
It is necessary to open the gas valve after ignition and let the fire wait for gas to be safe. The first gas is not ignited in time, and it is easy to cause accidents such as firing. This is actually a small explosion. Regularly check and replace the hoses connecting the pipelines and stoves to prevent loose connections, falling off, and aging air leakage. Some range hoods are equipped with an electric nose, which can monitor gas leakage. If you use liquefied gas, the electric nose will not work, because liquefied gas is heavier than air, and the leaked liquefied gas will accumulate on the ground, waiting for oil absorption The electric nose on the smoke machine responded to the alarm, and something had happened. It is forbidden to modify the gas line pipeline without permission, and it must be designed and constructed by the gas company. It is strictly forbidden to seal the gas valve for the sake of beauty during home decoration. It is not allowed to inspect or repair pipeline valves, gas meters and other facilities without permission. It is strictly forbidden to store multiple gas storage tanks in the kitchen. The liquefied gas tank must be kept away from heat sources and power sources. It is strictly forbidden to use hot water or electric mattresses to warm the liquefied gas tank. It is strictly forbidden to knock the collision liquefied gas tank. It is strictly forbidden to overfill liquefied gas, which is very dangerous. It is strictly prohibited to expose the liquefied gas tank to sunlight. It is strictly forbidden to dispose of liquefied gas residual liquid everywhere.
When using gas, especially when boiling water and cooking porridge, you must not leave people to prevent accidents caused by water boiling and fire extinguishing.
Develop a good habit of closing the main valve after using gas. Always check and close the gas valve when you are away from home on a business trip.
Don't panic if there is a fire in the gas pipeline or liquefied gas tank. This is generally not dangerous. Close the valve quickly to extinguish the fire. If the valve can't be deformed and closed, don't wipe out the fire with a wet towel, because the gas will continue to leak out and form explosive gas with the air, which is even more dangerous. The kitchen is best equipped with a dry powder fire extinguisher in case of emergency.
We are familiar with the habits and characteristics of gas, mastered its methods of use, and learned to check and respond to accidents, so that gas can safely serve our families. This is the common knowledge and qualities that modern people must master.
Although there are many types of tapping screws, they all have the following similarities:
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.
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