News

What factors need to be considered when selecting the pressure rating of the connecting flange ?

1. The design temperature and pressure of the container; 2. The connection standards for valves, fittings, temperature, pressure, and level gauges connected to it; 3. The influence of thermal stress on the flange of the connecting pipe in process pipelines (high-temperature, thermal pipelines); 4... Read More

Pressure rating of flanges

A flange, also known as a flange or flange. A flange is a component that connects shafts and is used for connecting pipe ends; Also useful are flanges on the inlet and outlet of equipment, used for connecting two devices, such as gearbox flanges. A flange connection or flange joint refers to a de... Read More

2023 Moscow Oil and Gas Exhibition

The 2023 Moscow Oil and Gas Exhibition (NEFTEGAZ), sponsored by Expocenter, has  be held from April 24 to April 27 at the Moscow Central Exhibition. The exhibition covers an area of 21000 square meters and attracts 22,820 visitors. The number of exhibitors and participating brands reached 573. Th... Read More

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
<< < Previous 123456 Next > >> Page 4 / 24