1. When the angle globe valve is opened, when the opening height of the valve disc is 25% ~ 30% of the nominal diameter, the flow has reached the maximum, indicating that the valve has reached the fully open position. Therefore, the full open position of the stop valve shall be determined by the stroke

Usually domestic, we use stainless steel flange, it is the common lathe to produce the flange, there will be some positive and negative error. Therefore, people are called theoretical weight, at present, the domestic general use of theoretical weight as the flange standard. In addition, we can also use the Department of Chemical Industry flange

The carbon steel flange seal is through the pretension force of the bolts, causes the gasket and the flange seal surface to produce the sufficient pressure, the gasket surface produces the distortion enough to fill the flange seal surface the microscopic irregularity, achieves the goal which does not leak. Through tempering, the metallographic microstructure tends to stabilize,

Because of the hydraulic bulging process of stainless steel tee, the equipment tonnage is large, which is mainly used in the manufacture of standard wall thickness stainless steel tee with less than 400. Our country’s transportation facility is the country “Eleven-Five” continues the big investment domain, according to the relevant information, the Ministry of Transportation and

The elbow formed by steel hot pressing or forging process is stainless steel elbow. The stainless steel elbow is butt welded with steel pipe through elbow, and two workpieces are welded together along the whole end face through resistance heating. There are usually two methods of resistance butt welding and flash butt welding, with high

Forging temperature range refers to the temperature interval between the initial forging temperature and the final forging temperature. In order to improve the plasticity and reduce the deformation resistance, we hope to increase the heating temperature of metal as much as possible; However, in order to ensure product quality and avoid defects in heating, the

In fact, at the beginning, all the wheels were made of wood or iron. Later, rubber tires were invented. Rubber tires can play a good role in shock absorption on uneven roads. But the train has been running on the track, there is no need for rubber tires. The train was invented before the car.

The blind flange is also called the 8-word blind plate, as its name implies, its shape is like 8 words, it is a blind plate at one end, the other end is a combination of throttle ring, in the transport of fluid, the use of throttle ring, cut off when the use of blind plate,

1. The flange of pressure vessel can be divided into general flange and reverse flange according to the overall structure of flange. 2. According to the type of flange gasket arrangement, we can divide it into narrow face flange and wide face flange. a. Narrow face flange refers to the gasket contact surface, located in

The basic principle and performance characteristics of the socket pipe fittings The other is that there is no less to negotiate in the pipeline. Root, also called the root hoop, lock nut, with one end for the short wire buckle, the other end for the long thread buckle short pipe and a root mother, plus