(1) The total leakage resistance of each production equipment system "or unit" should be below 1×106ω, and the electrostatic grounding resistance of each dedicated unit should not be greater than 100ω;
(2) The total leakage resistance of the metal equipment and equipment, pipeline and pipeline, such as connecting with metal flanges may not be connected to jumper wires, but there must be more than 2 bolts; the total leakage resistance must be below 1×106ω; the total leakage resistance must be below 1×106ω. The total leakage resistance must be below 1×106ω;
(3) The car tanker and tanker ship which can not be grounded normally should be grounded when loading and unloading flammable liquids at the preset location according to the requirements of the operation regulations, especially the materials used must be those which will not spark when impacted;
(4) The large metal devices with the diameter larger than 2.5m or the volume larger than 50m3 should have more than 2 grounding points, and the longer conveying pipelines should be connected at intervals of 2 to 3 times, and the longer conveying pipelines should be connected at intervals of 2 to 4 times. Longer conveying pipeline should be every 80-100m to set up a grounding point. 2. According to operating procedures to control the stirring speed of flammable liquids in the reactor. 3. Loading, unloading and conveying of flammable liquids, to prevent the generation of static electricity.
(1) filling, the liquid should enter from the bottom of the tanker and other large containers, or the injection pipe into the bottom of the container;
(2) control the flow rate of the liquid: filling railroad tanker, the liquid in the crane tube of the allowable flow rate is calculated according to the following formula: vd ≤ 0.8 where: v - hydrocarbon liquid flow rate, m / s; d Crane tube inner diameter, m. Large crane tube loading exit flow rate can exceed the calculated value of the above formula, but shall not be greater than 5m/s.
(3) in the delivery and filling process, should prevent the liquid from splashing, from the bottom or the upper part of the tank into the end of the injection pipe should be designed to make the liquid is not easy to make the liquid scattered inverted t-shaped shape or add another deflector; or in the upper filling, the liquid slowly downstream along the sidewalls, so that the liquid is not easy to make the liquid. So that the liquid along the side wall of the slow downstream;
(4) on the tanker and other large containers filled with hydrocarbon liquids, preferably from the bottom into the oil. If you have to use the top into the oil, it is appropriate to fill the pipe into the tank from the bottom of the tank is not more than 200mm. in the injection pipe does not intrude into the liquid before the flow rate should be limited to 1m/s.
(5) hydrocarbon liquids should avoid mixing other incompatible second phase impurities such as water, and should minimize and remove the tanker bottom and pipeline water. When the pipeline is clearly the presence of the second phase, the flow rate should be limited to 1m/s;
(6) in the storage tanks, tankers and other large containers, combustible liquids are not allowed to exist on the surface of the conductive floats are not grounded;
(7) when it is not possible to reduce the static build-up of the flow rate control and other methods, you can be equipped with a liquid static eliminator at the end of the pipeline;
(8) in the use of small portable containers filled with flammable insulating liquids, it is appropriate to use metal or conductive static capacitors, avoid the use of static non-conductor containers. For metal containers and metal funnels should be spanned and grounded.
(9) in the equipment for filling, mixing or circulating process, prohibit the ruler, sampling, temperature measurement and other on-site operations;
(10) when the filling, mixing or circulating stops, should be in accordance with operating procedures for a period of time before the next step.4. non-metallic pipe should not be used for the transport of flammable liquids. If you have to use, it is appropriate to use conductive pipe or wire, mesh pipe, and wire, mesh end of a reliable ground, or electrostatic shielding. 5. gaseous powder material protection measures.
(1) in the design and structure of process equipment should be avoided abnormal retention of powder, accumulation and flying; at the same time should be configured with the necessary confinement, sweeping and discharge devices;
(2) gas material conveying system, should be prevented from accidental mixing of foreign metal conductors to become insulated to ground conductor;
(3) should try to use a metal conductor to make piping or components . When static non-conductor is used, it should be specifically measured and evaluated the degree of electricity, and corresponding measures should be taken if necessary;
(4) if necessary, the center of the pipeline of the airflow conveying system can be added with a metal wire grounded at both ends along the direction of the pipeline in order to reduce the static potential inside the pipeline, and special pipeline static eliminators can also be used;
(5) the high-pressure combustible gases should be discharged into the air, and appropriate flow direction and premises should be selected. Suitable flow direction and premises. For high pressure, large capacity gas such as liquid hydrogen emissions, it is appropriate to install special inductive eliminator at the discharge port. 6. non-conductors, such as rubber, film, plastic film, paper, etc. produced in the production process of static electricity, should be taken to eliminate static eliminator elimination.
Legal basis: "Chinese People's **** and State Product Quality Law," Article XIV of the State according to internationally recognized quality management standards, the implementation of enterprise quality system certification system. Enterprises in accordance with the voluntary principle can be recognized by the State Council market supervision and management department or the State Council market supervision and management department authorized by the department recognized by the certification body to apply for enterprise quality system certification. Qualified by the certification, the certification body issued by the enterprise quality system certification. State reference to international advanced product standards and technical requirements, the implementation of product quality certification system. Enterprises in accordance with the voluntary principle can be recognized by the State Council market supervision and management department or the State Council market supervision and management department authorized by the department recognized by the certification body to apply for product quality certification. Qualified by the certification body to issue a certificate of product quality certification, allowing enterprises to use product quality certification mark on the product or its packaging.