7 Systems of Expanded Metal from Dongjie Company

Company Profile

Anping Dongjie Wire Mesh Products Company is located in Anping Hebei Province, which is the hometown of wire mesh in the world. The transportation to our factory is very convenient, the train station and the airport is only two hours’ drive.

We are a specialized manufacturer of expanded metal mesh, perforated metal mesh, decorative wire mesh, and stamping parts for decades. As always stuck into “Quality Proves Strength, Details Reach to Success”, Dongjie has achieved high acclaim in the old and new customers.

Dongjie Factory was established in 1996 with 10000 sqm areas. We have more than 100 professional workers and 4 professional workshops: expanded metal mesh workshop, perforated workshop, stamping wire mesh products workshop, molds made and deep-processing workshop. We have 15 sets of large expanded metal machines, 5 sets of medium expanded metal machine, 5 sets micro expanded metal machine, and 5 sets flattened machine.

We have adopted the ISO9001 Quality System Certificate, SGS Quality System Certificate, and modern management system.

Expanded metal is one of our main products. It’s a type of sheet metal that has been cut and stretched to form a regular pattern (usually diamond shape). Due to its method of production, expanded metal is one of the most economic and strong steel mesh or grating material on the market. Expanded metal is made from a solid sheet of metal, and it is not woven or welded, so it can never break.

Next please allow me to show you our 7 systems of the expanded metal mesh.

Supply System

Materials used to manufacture perforated metal Sheets include stainless steel, black steel, galvanized steel, aluminum, copper, brass, titanium, and many other materials.

There are some specifications for the materials.

Stainless steel is a material that anti-corrosion to the air, steam, water and acid, alkali, salt, and other chemical corrosion media.The common kinds of stainless steel include SS 201,304,316,316L, etc.

Galvanized steel is coated with zinc oxide to prevent rusting. The chemical compound takes far longer to corrode than steel. It also changes the steel’s appearance, giving it a shiny looking. Galvanization makes the steel stronger and harder to scratch.

Black steel is made of steel that has not been galvanized. Its name comes from the scaly, dark-colored iron oxide coating on its surface. It’s used in applications that don’t require galvanized steel.

Aluminum is a lightweight and nonmagnetic metal that is incredibly strong and versatile. Aluminum is corrosion resistant unlike steel, which can rust quickly when left out in the elements without a tight finish. Aluminum sheet metal can be used in many of the same ways of steel.

Copper is material that anti-corrosion just like stainless steel. In the highly corrosive air, the copper plate will form a strong, non-toxic passivation protective layer to protect the product from rust.

In addition to the above raw materials, we also have many other materials for the expanded metal mesh.

In order to supply our customers with high-quality products, we choose first-grade raw materials. This is the high-quality material without any scratching and rust post, so the finished product has a smooth and clean surface. Compared with the poor-quality material has rust spots, folding, and inclusion, therefore the finished product will have some quality problem.

Production System

This is the production process of the expanded metal. 

There are some key parameters during the production process.

First about the material, if the frame could not support the material well, it would easily damage the material and the material could not stay straight if the screw bolt became loose which would make the product failed. So we choose to use the material rack equipment which can protect the material well and make sure the production regular running.

There is an oil groove on the machine which can prevent oil contamination on the product. Before production, a layer of PE film will be covered on the raw materials to ensure that there is no oil contamination and scratches on the finished product.

After the stretching process, according to the different applications, there are standard expanded metal sheets and flatten expanded metal sheets. The expanded metal mesh will be flattened through the flattening machine.

The product will have some burrs as the mold will wear away during the production. So the mold needs to be regularly maintained and repaired during the production to ensure the normal work of the mold.

The surface treatment measures for expanded metal include powder coating, PVDF coating, galvanization, and anodizing.

The ordinary powder coating uses normal powder and makes a direct painting without any preliminary treatment. The high-quality powder coating uses high-quality powder which is ground more finely and can be more closely attached to the product. The product has been degreased and polished before high-quality powder coating to make the finished product look more refined.

Expanded metal is frequently used to make fences, walkways, and grates, as the material is very durable and strong. The many small openings in the material allow flow-through of air, water, and light, while still providing a mechanical barrier to larger objects. Another advantage is that the exposed edges of the expanded metal provide more traction, which has led to its use in catwalks or drainage covers.

Large quantities of expanded metal are used by the construction industry as metal lath to support materials such as plaster or stucco in walls and other structures.

In contemporary architecture, expanded metal has been used as an exposed facade or screen material which can be formed into simple or complex decorative shapes. Photographic images may be printed on the surface, producing textures or large graphic images, which still allow light to filter through the exterior surface of a building.

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The expanded metal mesh is widely used as facade cladding, anti-glare fence, chemical, and medical filtration mesh, barbecue grill mesh, plaster or stucco mesh, filter mesh, ceiling, door, and window mesh.

The hole shapes of expanded metal mesh include a diamond hole, hexagon hole, sector hole, and flower hole. Of course, the whole shape can also be customized according to your requirements.

Quality Control System

Our company has a 6 person quality control team which has achieved 23 years of professional QC experience. And we have a fully functional quality control management system to ensure the product will meet your requirements.

Before the production, the raw material should be tested in thickness and width to ensure the material is qualified.

During the production, our quality control team would adjust the machine in time once the product has any quality problem.

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After the product finished, the specifications including thickness, hole size, strand width, and sheet size should be tested to make sure the product is qualified. And we will have a test report for our customers to confirm the product quality.

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Packing System

After the product finished, there are usually two types of packing choices for expanded metal.

If packed in rolls, we will use kraft paper and woven bags to prevent scratch or damage, and the Fumigation-free wooden case with plastic wrap could prevent water and loss during transportation.

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If packed in pieces, we usually use bubble film to protect the products from damage and based on different weight, there are wooden pallets and steel pallets for you to choose from.

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Warehouse System

We have a professional warehouse management system, all employees of the company shall strictly abide by the warehouse management system.

We have a professional management system to record our stock, which would be updated at any time and keep in line with the inventory. It would be very convenient to check if there is any stock for the product you need.

Our warehouse is cleaned regularly to ensure the cleanliness and order of the product.

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Final Inspection

In order to ensure that the product can be transported safely and delivered to the customer’s address, we will arrange for the salesman and quality inspector to carry out a detailed inspection of the product packaging before shipping.

We will have a pre-shipment inspection form to check the product quality, weight, wooden box, and marks.

If the packing test is OK, then we will arrange the shipping. If not, the tester will feedback to our packing department and they should replace or modify the package, then we will test again. The products can not be shipped until it meets the requirements.

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After-Sale Service

Our company has a very professional team to serve our customers, including the sales department, production department, quality control department, packing department, and delivery department. Professional sales will supply high efficiency and timely communication. E-mail, whats-app, Skype, each method could reach to us.

We have attended exhibitions and organized customers visiting every year which helps us have a deep talk with customers about our cooperation. For our old customers, we make regular return visits and annual reports to help our customers analyze the market situations and explore more markets.

When the product was shipped, we will notify the customer of transportation information updates in a timely manner and follow up customer’s receipt, after the customer receives the product, we will inquire customer about the satisfaction of the product and packing.

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After the customers receive the goods, if there is any problem with the packing or products, we will have the customer complaint handling feedback form for customers. Our after-sales department will respond within 24 hours. As soon as we confirm the problem, we will be defining responsibility for problems based on contract and pre-sales communication records, and we will negotiate with customers to solve the problems with the fastest speed.

We have cooperated with many customers from all over the world including a construction company, decorative company, filter factory, and medical company.

Sincerely welcome to visit our factory and contact us for cooperation.

Thank you!


Post time: Sep-21-2020