With the expansion of Haihao Group’s business, more and more domestic and foreign customers cooperate with us. In order to better serve customers, Haihao began to upgrade the factory and warehouse in October. At present, the reconstruction project has begun, and the painting of the warehou ...

Heat treatment can generally be divided into two types according to process: preliminary heat treatment and final heat treatment. Generally, heat treatment will not change the shape and overall chemical composition of the workpiece, but will endow or improve the performance of the workpiece by c ...

The function of welded steel stainless steel flange is to butt weld the flange and pipe. The structure is reasonable, the compressive strength is high, the bending stiffness is large, and it can withstand ultra-high pressure, continuous bending and temperature fluctuations, and the sealing perfo ...

The gasket is a ring made of a material that can produce plastic deformation and has a certain strength. Most gaskets are cut from non-metallic plates, or made by professional factories according to the specified standards. Their materials are asbestos rubber sheets, asbestos sheets, PTFE sheets ...

With the increasing demand for prefabrication in the market, each factory is facing more challenges. In addition to the production of products, the factory still needs to master more technology to complete the assembly of products before leaving the factory. The assembly of pipe fittings cannot ...

Large diameter flange is one of the flanges. It refers to the flange that exceeds the size specified by the relevant national departments, and generally refers to the flange above DN2000. It is widely used and promoted in the machinery industry, chemical industry, wind power industry, and sewage ...

According to petrochemical standards, flanges can generally be divided into the following five types: flat welding flange, butt welding flange, socket welding flange, loose sleeve flange and threaded flange. The flat welding flange is simple in structure and uses less materials when making, but ...

Flange is a connecting part. According to different standards, there are different classifications. Let’s learn about them together. According to the chemical industry standards, it is divided into integral flange, threaded flange, plate type flat welding flange, neck butt welding flange, ...

There are seven common reasons for flange leakage: 1.The pipeline and flange are not vertical and concentric, and the flange surface is not parallel. When the internal medium pressure exceeds the load pressure of the gasket, flange leakage will occur. 2.The pipe and flange are vertical, but the ...

The global wind power industry has a history of more than 40 years. With the global energy structure changing to low-carbon and the energy consumption structure continuously optimizing, wind power as a renewable energy, has developed rapidly in recent years and the global wind power installed ca ...

We received an inquiry from a Dutch customer this week about various standard flanges, among which one of the customers needs anchor flanges. The anchor flange has been reported to the customer many times before. Today, let’s learn about anchor flange. Anchoring flange is the key part of l ...

For steel products such as steel pipes and pipe fittings, welding is the key point to ensure quality in the production process, and it is also the place that all pipe fittings manufacturers attach importance to. The mature welding process can guarantee the quality of the weld, thus ensuring that ...