Reducer

The diameter of the reducer is also large. One of the chemical pipe fittings for two different pipe diameters. It is divided into concentric size head and eccentric head. Eccentric reducer (reducer) for pipe fittings. The different diameter pipe material includes stainless steel reducer (304304l316316l), alloy steel, reducer tube carbon steel size head, diameter tube 20 steel q234q345, etc. The standard of different diameter: national standard and standard and various non-standard high pressure stamping. The quality of the reducer should meet the requirements of GB/T 12459-2005 of the current national standard "steel butt welding reducing pipe". The diameter of the reducer should not be more than 1% of the corresponding outer diameter, and the allowable deviation should be plus or minus 3mm. The deviation of the diameter of the reducer should be in accordance with the provisions of table 4.2.2-3. The different diameter tubes are implemented by SY/T5037, GB/T9711, GB/T8163, ASTM A106/A53 GRB,API 5L, APT5CT, ASTM A105, ASTM A234, ASTM.

We should note when using reduced-size reducer:

The classification of the reducer reducer mainly divided into the size of the eccentric and concentric reducer and eccentric reducer is generally used in the horizontal pipe, concentric size is generally used in vertical pipe, we should pay attention to when using the size of the head mark is a flat bottom or a top flat. The most commonly used parts in the compression pipeline are the size heads, but our research on the problem of size heads is still a blank. Under the action of internal pressure and in-plane bending moment, torque are analyzed in theory, studied the concentric reducer and eccentric reducer, and reducing pipe bending stress, then through experiment and numerical analysis is verified. When using the size head, there are the following:

1. If the flow of the fluid changes in the pipe, it becomes larger or smaller, and if the change in velocity is not strict, we can choose to use the size head.

2. To avoid the effect of cavitation on the size head, in the inlet of the head pump.

3. We can also choose the size head if we cooperate with some instruments such as regulating valves or flowmeters.

Production of seamless head:

The size head (reducer) is a pipe fitting for pipe diameter. It is usually used to press the forming process for reducing diameter pressing, diameter pressing or reducing diameter.

Diameter/diameter forming

The diameter forming process of the size head is to insert the tube billet with the diameter of the large end of the head into the forming mould, and the metal is moving and shrinking along the mold cavity by pressing the axial direction of the tube. According to the size of the diameter of the reducer, it can be divided into one crushing forming or multiple crushing forming.

stamping

In addition to using steel pipe as the raw material for raw material production, some specifications of the size head can be used in stamping process. The shape of the punching die used for drawing is the design of the surface dimension of the size head.

Apply dry cloth to clean the side of the socket and the outside of the socket, and wipe clean with acetone when the surface is sticky. Note the following points:

1, control diameter: DIN standard (DN10-6), 3 a/IDF criteria (1/2 "to 6"), ISO standard (12.7-152.4 Ф Ф);

2. International industrial standards: DIN, ISO, SMS, 3A, IDF, etc.

3. Product materials: stainless steel 304, 316, 316L;

4. Quality and purpose: the polishing equipment shall be used for the treatment of the inside and outside of the size head to meet the surface precision requirements; This product is suitable for dairy, food, beer, beverage, pharmaceutical, cosmetics and other industrial areas.

5. External processing: the non-standard products can be processed according to the user's requirements;

6. Connection mode: clamp (quick pack) type, welding type, thread (live) type.

Pay attention to the size of the head is also suitable for pipe diameter changes in environmental protection industry, are generally steel plate cutting, welding, pipe diameter sizes and materials are generally not hot rolled plate, application is very good, can save cost.