News

Seven common causes of flange leakage

1. Side opening Side opening refers to the fact that the pipeline is not perpendicular or concentric with the flange, and the flange surface is not parallel. When the internal medium pressure exceeds the load pressure of the gasket, flange leakage will occur. This situation is mainly caused durin... Read More

22nd International Exhibition for Equipment and Technologies for Oil and Gas Industries

Shanxi DongHuang Wind Power Flange Manufacturing Co., LTD. (DHDZ for short) is TUV and SGS authorized manufacturer of Steel Flanges and Forgings for over 10 years. With PED certificates and ISO9001: 2015 System, we DHDZ have been supplying various types of Forging products like Flanges, Tubes, Pi... Read More

Shanxi DHDZ wishes all goddesses a happy Women’s Day

The company to express the care and blessing of all female employees The following benefits are specially prepared: 1. Flower arrangement activity 2. Cupcakes & Goddess Red Envelopes 3. Half day holiday (all female employees have half day holiday) Goddess • Flower arrangement activity A flo... Read More

What are the causes of forming cracks and defects in forging process?

The mechanism analysis of crack inducement is conducive to mastering the essential reason of crack, which is the objective basis for crack identification. It can be observed from many forging crack case analysis and repeated experiments that the mechanism and characteristics of alloy steel forgin... Read More

Forging method of flat welding flange and matters needing attention

According to the movement mode of your favorite forging die, flat welding flange can be divided into swing rolling, swing rotary forging, roll forging, cross wedge rolling, ring rolling, cross rolling, etc. Precision forging can also be used in swing rolling, swing rotary forging and ring rolling... Read More

How to conduct post-forging heat treatment for forgings

It is necessary to conduct heat treatment after forging because its purpose is to eliminate the internal stress after forging. Adjust the forging hardness, improve the cutting performance; The coarse grains in the forging process are refined and uniform to prepare the microstructure of parts for ... Read More

What should I pay attention to when using a neck butt welding flange?

What should I pay attention to when using a neck butt welding flange? All metal with neck butt welding flange fittings will react with atmospheric oxygen, forming an oxide film on the surface. The product should be installed according to the instructions, so as to ensure the normal operation of t... Read More

Content and method of quality inspection for heat treatment of forgings

Heat treatment of forgings is an important link in machinery manufacturing. The quality of heat treatment is directly related to the intrinsic quality and performance of products or parts. There are many factors affecting the quality of heat treatment in the production. In order to ensure that th... Read More

How to clean stainless steel flange correctly and quickly

Usually stainless steel material is the main flange material, it is the most concerned place is the quality of the problem. This is also the most important topic in the quality of stainless steel flange manufacturers. So how to clean the residual stains on the flange correctly and quickly? The m... Read More

Use characteristics of blind flange

Flange blind plate is also called blind flange, real name blind plate. It's a connection form of a flange. One of its functions is to block the end of the pipeline, and the other is to facilitate the removal of debris in the pipeline during maintenance. As far as the sealing effect is concerned, ... Read More

What is the difference between flange and flange blind plate

Flanges are officially called flanges, and some are called flanges or stoppers. It is a flange without a hole in the middle, mainly used to seal the front end of the pipe, used to seal the nozzle. Its function and The head is identical to the sleeve except that the blind seal is a detachable sea... Read More

How to use various flanges

Different welding forms: flat welds cannot be checked by radiography, but butt welds can be checked by radiography. Fillet welding is used for flat welding flanges and flanges, while girth welding is used for butt welding flanges and pipes. A flat weld is two fillet welds and a butt weld is a but... Read More
<< < Previous 2345678 Next > >> Page 5 / 25