Characteristics of FRP grille

The performance characteristics of FRP grille are as follows: it has excellent corrosion resistance to acid, alkali, organic solvents, salts and other gas and liquid media, and has unparalleled advantages in the field of corrosion protection. According to the needs of practical application, o-benzene, m-benzene and vinyl resin can be used as matrix materials economically.

Light weight, high strength, easy to cut and install.

Because it is made of resin and glass fiber, the density is less than 2kg per cubic decimeter, which is only 1/4 of steel and 2/3 of aluminum. Its strength is 10 times that of rigid PVC, and its absolute strength exceeds the level of aluminum and ordinary steel. Its own light weight can greatly reduce the foundation support, thus reducing the material cost of the project. Convenient cutting and installation, no need for hot work and large lifting equipment, only a small number of manual and electric tools, greatly reducing the installation cost. Application of glass fiber reinforced plastic grating (FRP grating);

Water treatment: pavement of maintenance walkways, sewer cover plates, large containers, scrubbers, trash racks, running water tanks, hangers of biochemical water treatment tanks, ventilation window, stairs and cooling tower consoles.

Chemical plant: stair treads, operating platforms, guardrails, double floors, sink covers and grilles.

Petroleum industry: offshore oil platforms

Textile mill: covering cement floor, beside bleaching and dyeing pool, floor, near this valve, etc., without covering metal grating and wooden platform.

Power plant: gutter cover plate of chemical workshop, waste water pool, etc.

Metal surface treatment: pickling solution places, wood floors around replacement machines, high corrosive containers, electroplating line walkways and double floors.

Marine food processing factory: in harsh environment, such as greasy surface, on board.

Transportation: platforms, ship decks, walkways, military minesweepers and stair treads.

Beverage industry: stair stepping, replacing expensive stainless steel, loading floor.

Pulp and processing plants: stair treads and floors, floor walkways and places with high humidity.

Electronics industry: gutter cover plate, pickling workshop, anti-static (anti-static grid), high cleanliness workshop.

Meat processing plant: easy to corrode the ground, stairs, greasy floor workbench and stair treads.

Car wash/car beauty shop: car wash drain plate, parking space, car wash trough cover plate.

Crane: On the aisle of a 3-meter or 6-meter crane.

Others: corrosion-resistant shelves, decorations, square fountains, scaffolding, civil building facilities, aquaculture fences, double floors.

Operating platform: Many chemical plants have a large number of operating platforms. The operating platform with glass fiber reinforced plastic grille as paving material is corrosion-resistant, paint-free, maintenance-free, and has a long service life, which can be used for 15 to 20 years. Light weight, compared with steel, it reduces the weight by three quarters, so it is more suitable to use lifting equipment as an operating platform supported on the equipment during installation. It is very convenient to cut the holes of the glass fiber reinforced plastic grille. The arc cutting saw can easily cut holes that meet the requirements of installation equipment, and the mechanical properties of the grating will not change because of the opening, and the grating will not be scattered. For mobile operating platform, it is more suitable to use lightweight glass fiber reinforced plastic grille. In addition, the appropriate design makes the glass fiber reinforced plastic grille have moderate elasticity, which can reduce the fatigue of workers who work on it for a long time and improve the work efficiency. It is an ideal material for making platforms.

Walkways: Factories (such as chemical plants and steel plants). ) There are often many walkways, some between equipment and some for inspection. These walkways are generally welded with round steel. Due to corrosion, anti-corrosion coatings are often needed every year. Using glass fiber reinforced plastic grille to make these walkways does not need maintenance, which can not only keep the light of the walkways for a long time, but also make the walkways light in structure, which is the best choice for outdoor walkways in northern ice and snow season. Trench cover plate: electrolytic workshops in many chemical plants and smelters, and chemical treatment workshops in power plants; Pickling workshop of electroplating factory, storage battery factory and machinery factory; Pharmaceutical factory, printing and dyeing factory, salt mine, etc. There are a lot of grooves, and most of them are corrosive liquids. Traditional trenches include angle steel, flat iron welded grille, cast iron grille, cement cover plate and so on. These materials are not resistant to corrosion, and they will be destroyed in a few years or months, and the workshop will be fragmented. The use of glass fiber reinforced plastic grille can solve the corrosion problem well, and at the same time, it is convenient for sewage to be discharged into the ditch and the situation in the ditch can be observed at any time.

Offshore oil platforms: Traditional offshore oil platforms usually use steel plates as pavement materials. The harsh climate of the ocean and the erosion of seawater make these materials seriously corroded and increase the unsafe factors. Foreign countries have successfully used FRP grids in this harsh environment. Because the weight is reduced by three quarters, the components such as foundation support are easier to carry, and the total cost of the platform can be reduced through reasonable design.

Sewage treatment: In sewage treatment, the glass fiber reinforced plastic grille can be used as the paving material of the operating platform under the cooling tower, as the hanger of the raw meal cremation water treatment pool, and also as the maintenance walkway of the sewage treatment plant.

Stair step: The production equipment of chemical plants and petrochemical plants often has several or even dozens of floors, so a large number of stairs are needed. The traditional staircase welded by steel plate or round steel will be destroyed quickly in these corrosive environments. The stair pedal provided by our company not only solves the anti-corrosion problem, but also is non-slip and wear-resistant.

Fence: medium and high voltage equipment in the factory, and fences are generally set around large storage tanks as required. Linrun grille is an ideal material for these places because of its insulation, corrosion resistance, bright color and convenient installation. In addition, it can also be used for windows, fences and so on. In a chemical plant with a serious corrosive environment.

Top-filled platform: the walkways and platforms at the top of storage tanks are often seriously corroded and rusty everywhere, which is daunting. There are often hidden dangers of accidents in platforms and walkways with serious corrosion. The tank top platform made of FRP grille can completely change this situation.

Anti-corrosion shelves: There are a large number of shelves for storing batteries in the battery factory. Using FRP shelves can effectively solve the problem that traditional shelves are not resistant to corrosion.

Double floor: in many corrosive workshops, such as pulp refining workshop in pulp mill and electroplating workshop in electroplating factory. The traditional operation method is that the operator, finished product, waste residue and waste liquid are on the same floor, which is inconvenient and easy to damage the anticorrosion layer. Different from the concept of solid wood floor, it is a double-layer grid floor, that is, the upper layer is composed of FRP grid, and the lower layer is the building base. Operators walk on the grid surface, and finished products can be placed on the grid surface, while waste residue and waste residue can be discharged to the underlying base surface. After the operation, they can be washed with a powerful water sprayer to remove the deposits on the ground.

Boat deck: used as the material of boat deck or footbridge, it can greatly reduce the weight of deck, increase the cargo carrying capacity and prevent the corrosion of ship-borne medium and seawater. Its excellent diamagnetism is more suitable for use on minesweepers. 1, due to the low density and light material, it is easy to float when installing glass fiber reinforced plastic grating in areas with high groundwater level, so it is necessary to consider anti-floating measures such as setting piers or diverting rainwater runoff.

2. In the construction of opening tee on the installed glass fiber reinforced plastic grating and repairing the pipeline cracks, it is required to have a completely dry condition similar to that of a factory building, and the resin and fiber cloth used in the construction need to be cured for 7-8 hours, but it is generally difficult to meet this requirement in on-site construction and repair.

3. The existing underground pipeline detection equipment mainly detects metal pipelines, while the nonmetallic pipeline detection instruments are expensive, so the glass fiber reinforced plastic grating cannot be detected after being buried, and other subsequent construction units are easy to dig damaged pipelines during construction.

4. The glass fiber reinforced plastic grille has poor ultraviolet resistance. The exposed glass fiber reinforced plastic grille can delay the aging time by making 0.5mm thick resin-rich layer and ultraviolet absorber (factory processing) on its surface. With the passage of running time, the resin-rich layer and ultraviolet absorber will be destroyed, which will affect its service life. There are three main production processes of FRP grating: reciprocating fiber winding process, continuous fiber winding process and centrifugal casting process.

Reciprocating fiber winding process (belonging to fixed length method): In this process, the impregnation tank reciprocates with the rotating spindle, and the long glass fiber filaments are placed at a certain oblique angle relative to the spindle axis. The auxiliary angle (winding angle) is controlled by the ratio of the moving speed of the dipping tank to the rotating speed of the mandrel, and the translational movement of the dipping tank is controlled by computerized mechatronics. The number of winding layers is gradually increased until the designed wall thickness is reached. After winding is completed, the resin in the product is basically cured. After curing, the mandrel is taken out of the glass steel pipe.

Continuous fiber winding process (belonging to continuous method): This process is that the pipe passes through a feeding station for supplying the mixture of resin prepreg roving, chopped glass fiber reinforced plastic and resin sand, and the pipe is made in the continuous advancement of the mandrel.

Centrifugal casting process (belonging to fixed length method): this process is to send the cut glass fiber reinforced material and sand into a steel mold fixed on the bearing, and inject unsaturated resin with catalyst into one end of the steel mold to impregnate the reinforced material. Under the action of centrifugal force, the resin displaces the air in the fiber and filler, thus making dense non-porous composite materials. Due to the centrifugal force, a smooth, flat and resin-rich inner surface layer is formed on the inner wall of the pipeline. The pipe made by this method is also called FRP sand pipe.

In the world, there are more manufacturers who use reciprocating fiber winding process to manufacture pipes than the other two production processes. One of the reasons is that the glass steel pipe manufactured by the reciprocating fiber winding process has a wider range of uses and better applicability. Legend grid thickness (mm) rib back thickness (up/down) grid size (mm) whole plate size (mm) weight (kg/m2) porosity (%)130/5.038× 381220× 3660,120. 9 15×3050, 1268×40 10 0 78 14 0/5.0 38×38 1220×3660, 1220×4000, 1220×2440, 9 15×3050, 1264×40 10 5 78 20 0/5.0 38×38 1220×3660, 1220×4000, 1524×40 10, 997×30 12 8 65 25 0/5.0 38×38 1220×3660, 1226×40 10, 1532×40 10, 9 15×3050, 1524×4000, 997×30 12 3 68 30 0/5.0 38×38 1220×3660, 1220×40 10,9 15×3050, 1524×40 10 6 68 38 0/5.0 38×38 1220×3660, 1220×40 10, 1524×4038, 2 100×40 10, 998×40 10, 1220× 2440, 9 15× 3050, 1532× 40 10, 1532× 3050, 1000× 4000 568 505/7.5.1220× 3660, 1230× 40 10, 1220× 2440, 9/kloc.

1, it is necessary to determine what the glass fiber reinforced plastic grating plate is used for, that is, to clarify its use object. For example, the car wash factory bought a grille board and prepared to use it as a load-bearing board for car washing.

2. After determining the purpose of the FRP grating, it is time to determine the size and specifications of the grating plate used. Through the relevant introduction of the manufacturer, you can have a general understanding of the grid plate. For example, for car washing, you can choose 2.5cm thick grating plates or 3.8cm thick grating plates. In plating equipment factory, 2.5cm thick grating plates are commonly used. In sewage treatment plants and chemical plants, it is often a 3.8cm thick grid plate.

3. After choosing the appropriate thickness of FRP grating, the size of grating plate should be calculated when using it. Just like in a car wash. The size of a car wash is mostly 1.220m*2.440m, while the size of glass fiber reinforced plastic grille is 1.220*3.660, which needs to be cut before it can be put into use.

4. Choose the appropriate raw materials to make the FRP grating plate that meets the requirements. If the grid plate is used in chemical plants or sewage treatment plants, it is necessary to choose resin with high corrosion resistance for production. The laying of glass fiber reinforced plastic grille can be carried out with special equipment modified by tractors or cars, and generally it is laid manually. Both ends of the paper tube of each roll of glass fiber grating products are marked with orange and blue marks. Before laying, the rubber surface should be selected to face down, and the color of the above mark should be determined at one end to facilitate construction and avoid mistakes in laying the rubber surface. When laying glass fiber reinforced plastic grating, it should be kept flat and tight, and both sides should be aligned. It can be leveled with a spirit level to make the glass fiber reinforced plastic grating have effective tension, and then rolled with a clean steel wheel roller after laying. The glass fiber reinforced plastic grille is clean and bright, and the color is more abundant. There are two kinds of commonly used FRP grilles: self-adhesive and non-self-adhesive. The self-adhesive can be directly laid on a flat base, and the non-self-adhesive is generally fixed by stainless steel buckles and steel nails. Non-self-adhesive glass fiber grating is used in ordinary road sections, and the required materials for fixing are: ①50×50×0.3mm fixed stainless steel buckle, which is required to be flat and warpage-free, and the periphery should be chamfered; ②2 inch steel nails. When fixing steel nails or stainless steel clamping rings are used to lay the glass fiber reinforced plastic grating, the clamping rings and steel nails fixed at one end are fixed on the base which has been paved with adhesive asphalt, and the steel nails can be shot by hammering or shooting. Then the fixed grid is longitudinally tensioned in sections, and the length of each section is 2 ~ 5m. It can also be segmented according to the contraction joint spacing, and the position of steel nails can be set at the joint gap. The glass fiber is required to be in a straight tension state in both longitudinal and transverse directions when the grid is tightened. The lap joint of glass fiber reinforced plastic grille is longitudinal lap joint, with the lap joint width not less than 20mm and the transverse lap joint width not less than 15mm. Longitudinal lap joints place the former above the latter according to the asphalt laying direction. When fixing, steel nails can't be nailed on the glass fiber reinforced plastic grille, and you can't directly hit the glass fiber reinforced plastic grille with a hammer. If the steel nail is broken or the snap ring is loose after fixation, it needs to be fixed again. After the glass fiber grating is laid and fixed, it must be moderately rolled and stabilized with rubber rollers, so that the glass fiber grating can be firmly bonded with the original pavement.

In actual construction, some construction units directly lay the glass fiber grating and then the roller after laying the adhesive layer oil, which has good effect and is not easy to wrinkle. In the actual operation process, the construction quality has a great influence on the use effect of FRP grille in the future.