How to remove static electricity from PP (polypropylene) pipes?

1. Confirm the flow rate of HCL 2. Cover the outer ring of the PP pipe with a metal mesh and ground it 3. If this pipe is in a clean room environment, you need to adjust the humidity of the air conditioner to be slightly higher to reduce the generation of static electricity

You may not be very good if you do that. You can consider embedding metal conductors in the pipes, linking them into lines, and then conducting the static electricity.

Yes, you cannot embed metal conductors in PP pipes, otherwise there will be problems with the strength of the pipes; try adding a hoop every half meter, and you will know after testing, and you will not lose money anyway!

Check the conductivity of the raw material, if it is less than 1000000000. Personally, I don’t think it’s the focus of explosion protection. If it is larger, can it be added to the electrostatic agent?

Wrap a metal wire or tape around the outside of the PP pipe, connect it to the metal flange, and then ground it, so that static electricity can be conducted away.

PP is a plastic pipe and cannot be connected to metal flanges!

Add a hoop on the outside? The static electricity generated is usually inside the pipe, so what's the use of adding a hoop on the outside? Can it work? Can you be more specific?

Recommend a composite plastic pipe: http://www.mianfeilunwen.com/Gongke/Cailiao/15721_3.html Aluminum composite pipe (PAP) Aluminum-plastic composite pipe (PAP) is a new type of pipe that combines the advantages of metal and plastic. The aluminum-plastic composite pipe is composed of five layers. The outer and inner walls are chemically cross-linked polyethylene, and the middle is a layer of about 0.3mm thin aluminum plate welded pipe. ； There is a layer of adhesive between the aluminum tube and the inner and outer layers of polyethylene, which are firmly bonded. The structure of the aluminum-plastic composite pipe determines that this pipe has the characteristics of both plastic pipes and metal pipes. Chemically cross-linked polyethylene with stable chemical properties is used in the inner and outer layers that are in contact with the outside world, avoiding the contact between the metal aluminum layer and the outside world. ； The plastic is in the outer layer and the stronger metal layer is in the middle. On the one hand, it protects against external corrosion, and on the other hand, it enhances the strength and plasticity of the pipe. 　　9.1 Plastic-plastic composite pipe has the following characteristics: 　　9.1.1 Corrosion resistance: The inner and outer walls are made of cross-linked polyethylene with very high chemical stability. Not only will it not be corroded in water, but it can also resist most corrosive chemical liquids such as strong acids and alkalis. ； 　　9.1.2 No rebound: Due to the presence of aluminum pipe layers with good plasticity, aluminum-plastic composite pipes can be bent to straight or from straight to curved and maintain the changed shape. This feature is particularly convenient for rolled aluminum-plastic composite pipes for indoor surface installation construction. ； 　　9.1.3 Good barrier properties: Welding dense aluminum pipes completely prevents penetration inside and outside the pipe wall ； 　　9.1.4 High density: For pipes of the same diameter and length, aluminum-plastic composite pipes are about 1/7 of the mass of steel pipes. ； 　　9.1.5 Easy installation: No need to thread or cut, the connection is very easy. Extra long pipe length, high economy ； 　　9.1.6 High temperature resistance: Aluminum-plastic composite pipes made of cross-linked polyethylene can work continuously in media above 95°C ； 　9.1.7 Good reliability: Service life up to 50 years ； 　　9.1.8 Small flow resistance: The inner wall is smooth and does not scale, and the flow rate is larger than that of metal pipes with the same inner diameter. ； 　　9.1.9 Aesthetics: The outer wall of the aluminum-plastic composite pipe can be of different colors, and no paint is required for open pipe construction. ； 　　9.1.10 Ease of detection: With metal aluminum, the location can be easily detected after concealed construction. ； 　　9.1.11 Antistatic: Can be used to transport various types of flammable fluids ； 　　9.2 Main application areas of aluminum-plastic composite pipes: 　　9.2.1 Building materials: Pipes for tap water, heating and drinking water supply systems ； 　　9.2.2 Pipes for indoor transportation of coal gas, natural gas and pipeline petroleum gas ； 　　9.2.3 Industrial pipes ； 　　9.2.4 Chemical industry: Transportation of various acid and alkali solutions ； 　　9.2.5 Medicine: Various gas and liquid transportation ； 　　9.2.6 Petrochemicals ； Transportation of kerosene, gasoline and other fluids ； 　　9.2.7 Marine pipes: Pipes for various piping systems in water transportation vehicles 9.2.8 Food industry: Transporting wine, beverages, etc. ； 　　9.2.9 Air conditioning duct system, etc. ； 　　9.2.10 Transportation of industrial gases such as compressed air.

Since there is corrosion and anti-static is required, we should switch to steel frame pipes. This kind of pipe used in our factory is very effective in producing sulfur and ammonia, but it is not resistant to high temperatures and needs to be less than 70 degrees. If necessary, I can help you contact the manufacturer.

Everyone is discussing ways to eliminate static electricity, but they have ignored the question raised by the poster. The poster mentioned that the Work Safety Supervision Bureau asked him to take measures to eliminate static electricity because the raw materials he used contained HCl. Here are some instructions about HCl. Is it necessary to take measures to eliminate static electricity? Part one: Chemical name Chemical name in Chinese: Hydrogen chloride, (HCl dissolved in water: Hydrochloric acid) (Attention! Hydrochloric acid is a mixture, not a compound! ) Chemical name in English: hydrochloric acid Chinese name 2: Hydrochloric acid English name 2: chlorohydric acid technical specification code: 995 CAS No.: 7647-01-0 Molecular formula: HCl molecular weight: 36.46 Part 2: Ingredient/Composition Information Hazardous Ingredient Content CAS No. Hydrochloric Acid 36%～38% 7647-01-0 Density: 1.19g/cm3 Part 3: Hazard Summary Hazard Category: 　　Invasion route: 　　health hazards: Contact with its vapor or smoke can cause acute poisoning, conjunctivitis, burning sensation in the mucous membranes of the nose and mouth, epistaxis, gum bleeding, tracheitis, etc. Mistaken use can cause gastrointestinal burns and ulcer formation, and may cause gastric perforation, peritonitis, etc. Eye and skin contact may cause burns. chronic effects: Long-term exposure can cause chronic rhinitis, chronic bronchitis, tooth erosion and skin damage. 　　environmental hazards: It is harmful to the environment and can cause pollution to water bodies and soil. 　　Fire and explosion hazard: This product is non-flammable, highly corrosive and irritating, and can cause burns to the human body.

I think the poster’s problem is that the Work Safety Supervision Bureau requires the use of PP pipes because the raw materials they use contain HCl, which corrodes metal pipes. Whether static electricity is generated during pipeline transportation of raw materials cannot be determined by the properties of HCl.

Personally, I feel that HCL does not need to do static electricity prevention. Since there are no PP pipes in the factory, I raised the same question as on the 10th floor. Static electricity is generated internally. What is the role of external hoops? Induction to derive static electricity?

There is also HCI in the raw material. It is not just one kind of raw material, so it is necessary to add an electrostatic discharge device. The main consideration is to control the flow rate. Just control the flow rate.

There are special anti-static anti-static PP sheets, and there are also pipes. Anti-static PP sheet, anti-static polypropylene sheet synthesis: It is made from polypropylene resin through integral extrusion molding method. performance: Resistant to acid, alkali, corrosion, non-toxic, odorless, and has good physical and mechanical properties. Appearance: The surface of the board is smooth and flat, without cracks, cracks or bubbles. use: Acid and alkali resistant industrial use, food packaging, chemical container lining and water treatment equipment, etc. Existing specifications: 1220 * 2440, 1000 * 2000, 1300 * 2000 or any color: White, black (other colors customized) Thickness: 0.1-2mm PP transparent antistatic sheet, resistance value 10 to the 9-11th power, PP black antistatic sheet, resistance value 10 to the 6-8th power, suitable for electronic product packaging and blister.

There are special anti-static anti-static PP sheets,

The poster is talking about raw materials that add hydrochloric acid to flammable solvents such as acid ethanol. I did a safety assessment of a factory and found the solution.: Control the flow rate, add metal wires to the pipeline, and seal the receiving container with nitrogen

Use static-conductive rubber hoses or static-resistant PP pipes. Another way to prevent the generation of static electricity is to increase the pipe diameter, reduce the pressure and control the flow rate so that VD is less than or equal to 0.8.

19# taizhong Gao, we are HCL ethanol