News
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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 excee...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...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 da...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...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 roll...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 coar...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 ...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 ar...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 f...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 t...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. ...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 ...Read more
