EPC Steel And Processing Group

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Carbon Steel Plate Cutting

EPC Steel can process the steel plate into different shapes according to customers' technical drawings. 

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What is the advantage of 3PE coating pipe?

What is 3PE coating pipe

3PE coating pipe is short for “three layers structure polyethylene anticorrosion coating steel pipe”. There are three layers in this pipe coating structure:

The first one: Epoxy layer (Thickness > 100um)

The second one: Adhesive layer (Thickness: 170um~250um)

The third one: Polyethylene layer (Thickness: 1.8~3.7mm).

What is the characteristic of the 3PE coating pipe

3PE coated pipe is the most advanced technology for the pipe anticorrosion. It puts together the advantage of the 2PE coating pipe and FBE coating pipe while at the same time avoids their weaknesses. Each layer of the 3PE coated pipe has its unique function in the coating structure.

l  The epoxy layer is for the main anticorrosion function. It has strong connection with the surface of the bare steel pipe, favorable cathodic disbondment property, wide temperature range (-40℃-100℃) and low water-absorbing quality.

l  The adhesive layer is to connect the epoxy layer and PE layer, whose main chemical composition is polyolefin. The polyolefin’s polar functional group can generate hydrogen bond or chemical bond with epoxy group of the FBE layer, making firm connection with the bottom layer. At the same time, the polyolefin’s nonpolar ethylene has affinity interaction with the PE layer, also generating favorable adhesive property with the face layer.

l  The PE layer has favorable electrical insulation property, low water-absorbing quality and strong resistance to mechanical damage. This layer mainly has function of mechanical protection and anti-corrosion.

So 3PE coated pipe is a kind of composite system of these three layers with different functions, making the whole system is with all the functions to better protect pipeline.

What is the advantage of the 3PE coating steel pipes

Normal bare pipe will be corroded in the severe environment and its lifetime will be reduced, making the construction and maintainance cost very high. But due to every layer of the 3PE coating system has its good performance, the 3PE coated pipe can protect the pipe in the severe environment and extend its lifetime to 30-50 years even longer. it can significantly reduces the construction and maintainance cost for the pipeline. At the same time, the 3PE coated pipe has favorable thermal insulation property, the thermal losses is just 25% of the traditional pipe, saving a lot of energy cost during operation. At last, the 3PE coated pipe can directly be laid underground or in the water even directly in the frozen earth because of its good anticorrosion property and impact resistance property in the low temperature, no need to construct ditch.

What is the usage of the 3PE coating steel pipe

Due to the characteristic and advantage of the 3PE coated pipe, it is widely used in many kinds of applications such as oil & gas, water transmission, heat transmission, mining, fire-fighting, thermal power station, electric power, communication facilities, highway, chemical pharmaceutical, printing and dyeing and agricultural applications. And with its further development, the 3PE coated pipe will play more and more important role in the global development.

Article Link: http://www.epcsteel.com/what-is-the-advantage-of-the-3pe-coating-pipe/ 

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Double Eleven Global Shopping Festival

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How to Produce the HF Welded Serrated Fin Tube

I. Advantages

Serrated fin tube is now more and more popular in the manufacturing of boiler, pressure vessel and other heat exchanger equipments. It has more advantages than other common solid fin tube, which mainly includes: 

1.     Higher heat transfer coefficient. The serrate can make the gas flow across the fins freely, enhancing the turbulent motion and improving the heat transfer effect. Researches show that serrated fin tube’s heat transfer efficiency is about 15-20% higher than common solid fin tube.

2.     Reduce metal consume. Due to the higher heat transfer coefficient, for the same amount of heat, serrated fin tube is with less heat transfer areas, which help reduce the metal consume.

3.     Anti-ash-deposition and anti-scaling. Due to the serrate, it is very hard for the serrated fin tube to deposit the ash and scaling.

4.     It is more flexible to adapt to the changes of gas flow direction.

II. Production Process

With these advantages, serrated fin tube is now more and more popular among the customers. This article will help illustrate how to produce the serrated fin tube.

1.     Design the serrated fin tube, confirm the detailed parameter with the customers, which mainly includes the pipe length, OD, thickness, fin height, the number of fins within 1 meter and the serrate parameter.

2.     Cutting the pipe to fixed length. Customers have different need with the fin tube length, so we need to cut the steel pipe into different length. Normally the length of the fin tube is around 2-6 meter, but also some customers have need with the 18-25m. The maximum length EPC Steel can produce is up to 25m.

3.     Split steel coil into steel strap. The height of fins is equal to the width of steel strap, so we need to cut the coil into the strap according to different fins height.

4.     Then we need to punch on the strip using the equipment as below. If we produce the solid fin tube, we don’t need to punch on the strip, just go to the next step. But if we produce the serrated fin tube, we need to punch on the strip. We can’t see big difference after the teeth punch. But after the punched strip been welded on to the pipe, due to the radius of highest point on the strip is bigger than lowest point, the stress on the highest point is also bigger than the lowest point’s, so the stress will pull open the serrate.

5.     Weld the steel strip on to the steel pipe. In order to control the number of fins within 1 inch or 1 meter, we need to control the pipe rotation speed and the strip feed speed. And normally the high frequency weld method is widely used in the manufacturing of welded fin tube.

6.     Then we need to bevel on the ends of tubes to make sure the fin tube is easy to weld on the project site.

7.     Inspection

During and after the production, we need to inspect the fin tubes to make sure they are in strict accordance with the drawings. So we need to inspect the length of tubes, the OD, the tube thickness, the fin height, the serrate depth, the fin numbers within 1 meter and other parameter.

8.     Package

After the inspection results are sure to meet the customer’s requirements, then the goods will be packed into the wooden box or plastic bags with steel strip. We need to put the wooden plate between each piece of fin tube to ensure they will not contact with each other. Otherwise, the fins will be damaged.

III. EPC Steel Advantages:

Above process is the whole production process for the serrated fin tube. The key advantages that EPC Steel has are as below:

1.     Engineering and Design. Besides we can produce the serrated fin tube according to the customer’s drawings, we can also design the serrated fin tube according to customer’s actual usage and needs.

2.     The maximum length of the serrated fin tube can up to be 25meter

3.     Strict Quality Control. We have a set of method to make sure the production and inspection are in strict accordance with our ITP files.

If you have need with the serrated fin tube, welcome to contact with us. EPC Steel will try best to serve you with our experience and expertise.

Link: http://www.epcsteel.com/produce-hf-welded-serrated-fin-tube/ 

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The customer want to make sure the product quality, directly take the hammer to strike the goods for several times

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EPC Steel And Processing Group deliver 25 Meter length pipe pile with external coating