Selection skills of expansion joints

The expansion joints adopts rectangular section and fillet shape, and the single expansion joint in the pipeline is subjected to two dimensional displacement.

1, after the user has selected the appropriate compensator according to the thermal displacement of the piping system, at least have to provide the flow medium in the pipe, the design pressure of smoke duct, the highest temperature during operation, and the size of duct waveform wave cross section selection, structure design and manufacture for compensator.

2, in order to reduce the wave number of bellows, cold drawing should be considered 50%.

3, The compensator is suitable for occasions where the sectional area is less than 4.6 square meters and the shape of the flue duct has a side smaller than 1.5m but greater than 0.6mm.

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You must know the precautions in use of expansion joints

The expansion joints consists of a bellows (an elastic element) that forms the main part of the work, an end tube, a bracket, a flange, a catheter, etc.. The utility model belongs to a compensation element.

1, compensation form detection of compensator. As different types of metal compensators have different forms of compensation, they mainly include axial, transverse, angular and combined compensation methods.

2, it is important that the compensator be fixed during the installation. The model, specifications and piping configuration must comply with the design requirements.

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Tips of cleaning stainless steel elbow

In cleaning stainless steel elbow, we need to pay attention to the following two aspects:

1, according to the requirements of stainless steel elbow and the surface conditions, cleaning by alkali washing, chlorine solvent blasting, water-soluble cleaning agent, shot blasting and other ways.

2, the stainless steel elbow cleaning, generally do not use pickling method to clean up. Mastering the main points of cleaning stainless steel elbow can improve the safety performance and prolong the use cycle of stainless steel elbow.

When the stainless steel elbow is welded, if it is repeatedly heated, it will precipitate carbide, which will reduce its corrosion resistance and mechanical properties.

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Manufacturing process of flange

Flanges include various types of Weld flanges and blind flanges. The welding flange is not easy to deform and seal well. It is widely used.

The butt welding flange has corresponding rigidity and elasticity requirements and reasonable transition of welding and thinning, and the welding joint is away from the joint surface, and the joint face is free from welding temperature deformation. It takes a pair of body structure is more complex, suitable for pressure or temperature fluctuations of the pipeline or high temperature and high pressure and low temperature pipeline, generally used for connecting pipes and valves of PN is greater than 2.5MPa. Also used to transport expensive, flammable and explosive media on the pipeline.

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Considerations for selecting flange

The flange is a connecting part between the shaft and the shaft, used for the connection between the ends of the pipe.

The following factors should be considered in selecting flanges:

1, the nature of the transport medium, general media, extra media, toxic media, flammable and explosive media;

2, according to the parameters of the medium, the work pressure, the work temperature, in the case of the medium is determined, according to the working temperature and work pressure of the medium to determine the nominal pressure of flange PN.

3, according to the application place and connection condition, determine the connection method of flange and pipe and the way of sealing face.

4, according to the joint target determine flange specifications.

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What is the use of the splay blind plate

One end of the splay blind plate is a blind plate, and the other end is composed of a throttling ring. In the transmission of fluid, the use of throttling ring, cut, the use of blind plate, a bit like the role of shut-off valve.

It can be used to cut off the valve when leaking, and its sealing performance is better. The main function of the splay blind plate is the complete separation.

The inlet or outlet of the combustible or poisonous medium pipeline shall be equipped with double gate valves, and the splay blind plate shall be installed at the double gate valve, so that the splay blind plate is normally marked as normally open.

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Made of high-quality carbon steel bend

Carbon steel bend is made of carbon steel tube as parent material, and it is bent by hot stewing or cold stewing.

Carbon steel can be divided into three kinds of carbon structural steel, carbon tool steel and free cutting structural steel according to its use, and carbon structural steel is divided into two kinds: construction steel and machine manufacture structural steel.

Carbon steel not only has good plasticity and weldability, but also has high strength and hardness, and has good wear resistance. Therefore, carbon steel bend in power plants, power, concrete pump transmission and many other industries have a wide range of applications.

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What are the uses of carbon steel cap

Carbon steel cap used for sealing pipe, and the same pipe plug, but the cap can be directly screwed on the pipe, do not need other fittings.

Carbon steel cap is an important component of pressure vessel equipment in petrochemical industry, atomic energy industry, food and pharmacy industry.

The carbon steel cap is the end cover of the pressure vessel, and it is the main pressure component of the pressure vessel. The quality of the cap is directly related to the long-term safe and reliable operation of the pressure vessel.

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How to choose the flange

Flange is a part of the shaft and the shaft is connected to each other for the connection between the pipe end. Due to the good performance of the flange, it is widely used in chemical engineering, construction, drainage, oil and other infrastructure projects. Then, how to choose flange?

1, the nature of the transport medium, the general medium, especially medium, toxic medium, flammable and explosive media;

2, according to the parameters of the medium, working pressure, working temperature, in the case of the medium is determined, according to the working temperature and working pressure of the medium to determine the nominal pressure of the flange PN.

3, according to the use of the site, the connection conditions to determine the flange and pipe connection and sealing surface.

4, according to the connection of the target to determine the size of the flange.

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Forging process of welding neck flange

The welding neck flange is mainly used for the welding of the flange and the pipe, the layout is reasonable, the strength and the rigidity is big, can withstand the high temperature and high pressure and the repeated bending and the temperature fluctuation, the seal is reliable.

The forging process of the welding neck flange is composed of the following processes, namely, the selection of high quality billet cutting, heating, forming, forging and cooling. The forging process includes free forging, die forging. Production, according to the size of the quality of the forging, the number of production batches to choose different forging methods.

The free forging has low productivity and large machining allowance, but the tool is simple and universal, so it is widely used in forging the single piece and small batch forging. High productivity, simple operation, easy to realize mechanization and automation.

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Service life of compensator

Now the use of compensator is becoming more and more popular. A flexible structure, which is arranged on a housing or a pipe, to compensate for additional stresses due to temperature difference and mechanical vibration.

Because of its flexibility and flexibility, it has the advantages of reliable operation, good performance, no leakage, corrosion resistance, compact structure and easy installation. Has been widely used in petrochemical, metallurgy, thermal power, urban heating, iron and steel, construction and other industries of various types of pipes and equipment.

The compensator used in the container, there are many forms, in terms of the shape of the wave, the U type compensator is widely used, followed by the Omega shape and C shape, etc.. In the pipeline on the use of the compensator on the structure of compensation, there are internal pressure, external pressure, pressure balance, hinge type, etc..

The service life of the compensator is closely related to the environmental conditions. To regular cleaning and maintenance, in order to extend the service life.

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How to repair the leakage of flange

In the continuous production of modern industry, the flange is affected by the factors such as medium corrosion, erosion, temperature, pressure, vibration and so on. It will inevitably leak problem.

Due to the size of the sealing surface of the processing error, the aging of the sealing elements and improper installation and other reasons are extremely easy to cause the leakage of flange.

The method to solve the flange leakage is to replace the sealing element and apply sealant or replace the flange and pipe. However, this method has a lot of limitations, and some leakage is limited by the safety requirements of the working environment, and can not be solved on the spot. It can be used in the field of polymer composite plugging, which applies a more mature system.

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Common sense of stainless steel elbow

Stainless steel elbow in the pipeline system, the elbow is to change the direction of pipe fittings. Stainless steel elbow in accordance with the correct and reasonable method of use and maintenance, can be a good extension of service life.

1, stainless steel elbow ball valve, globe valve, gate valve, only for full or full closed. Should not be used to regulate the flow, so as to avoid the erosion of the sealing surface, accelerated wear.

2, long-term storage of stainless steel elbow, should be scheduled for inspection. It is necessary to keep the exposed surface clean, remove dirt, and keep it clean and dry in the room.

3, the installation, the stainless steel elbow can be directly connected to the pipeline in accordance with the connection, in accordance with the use of the location of the installation.

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Precautions for use of stainless steel elbow

In the use of stainless steel elbow, the need to pay attention to a lot of things. Only the correct use, in order to play its greatest value.

When installed, the stainless steel elbow can be directly installed on the pipeline according to the connection mode, and is installed according to the position.

Under normal circumstances, can be installed in any position on the pipeline, but the need for easy operation of the inspection, pay attention to the direction of the flow of stainless steel elbow media should be below the vertical valve flap, stainless steel elbow can only be installed horizontally. Stainless steel elbow in the installation should pay attention to sealing, prevent leakage phenomenon, affecting the normal operation of the pipeline.

Stainless steel elbow hand wheel, do not use leverage or other tools, so as not to damage the valve parts.

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The process of forge fitting

The forge fitting is made by forging process. A method for processing a metal blank by applying pressure to produce a plastic deformation to obtain a certain mechanical property, a certain shape and size of the forging.

The beat pipe continuously, so that the original ingot segregation, porosity, porosity, slag compaction and welding, the microstructure becomes more closely, to improve the plasticity and mechanical properties of metals.

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How to use the threaded plug

Threaded plug is mainly used in the measurement of product diameter. Threaded plug should be qualified the relevant inspection agencies inspection measurement measurement, can be used in production field.

1, first of all to clean up the thread measured oil and impurities, and then in the thread and the measured thread right now, with the thumb and index finger ring rotation, to spin in the free state together through all thread length determination qualified, otherwise not to judge.

2, before use should be qualified by the metrological inspection agency related measurement, and then in the threaded and the measured threaded right now, with the thumb and index finger ring rotation, screw length within 2 pitch for qualified, otherwise as unqualified products.

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What the structure of welded elbow

The welded elbow can be welded on the pipe or steel plate after cutting, and the specification can be very large. The number of bends and bending radii are determined by the use of free demand.

The appearance of welding elbow is fixed, of course, the general appearance of the welded elbow is different according to the steel pipe to choose. Welding elbow production process, we must first select the specifications, put forward the tube material, and then make.

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What is expansion joint

The expansion joint is a flexible structure which is arranged on the shell of the container or the pipe to compensate the additional stress caused by the temperature difference and the mechanical vibration.

The expansion joint is also called a compensator, or expansion joint. It consists of corrugated pipe, end pipe, bracket, flange, pipe and so on.

Because the expansion joint is an elastic compensation element which can freely stretch. It has been widely used in chemical industry, metallurgy, nuclear power and so on.

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Use of expansion joints

The expansion joint is a flexible structure which is arranged on the shell of the container or the pipe to compensate the additional stress caused by the temperature difference and the mechanical vibration.

It is widely used in chemical industry, metallurgy, nuclear energy and so on, because of its flexibility, good performance and compact structure.

The expansion joint is also called a compensator, or expansion joint. It consists of corrugated pipe, end pipe, bracket, flange, pipe and so on.

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Technics process of galvanized elbow

Galvanized elbow is a bend in the elbow surface is coated with a layer of zinc material to improve the corrosion resistance of the elbow.

The biggest advantage of zinc sulfate elbow is the current efficiency of 100% and the deposition rate is fast. High deposition rate and excellent protection performance.

The galvanized elbow is made of galvanized iron alloy with sulfate, which is perforated through the groove of the production line and has no solution or overflow.

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Use of galvanized elbow

Galvanized elbow is a kind of elbow, it is to bend the surface of a layer of zinc plating material to improve the corrosion resistance of the elbow.

The galvanized elbow is made of galvanized iron alloy with sulfate, which is perforated through the groove of the production line and has no solution or overflow. The use of galvanized elbow now gas, heating with the kind of iron pipe is galvanized elbow.

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The particularity of carbon steel cap

Carbon steel cap used for sealing pipe, and the same pipe plug, but the cap can be directly screwed on the pipe, do not need other fittings.

Carbon steel cap is an important component in the petrochemical industry, atomic energy to food and pharmaceutical industry pressure vessel equipment.

Carbon steel cap is the end cover of pressure vessel, it is a main pressure part of pressure vessel. Its quality is directly related to the safe and reliable operation of the pressure vessel for a long time. The direction of weld seam is only allowed to be radial and circumferential.

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Production process of antirot flange

Antirot flange mainly adopts oiled, galvanized anti-corrosion measures etc..

According to the components of the flange can be divided into container flange and pipe flange; according to the structural type, there are integral flange, flange and threaded flange.

Antirot flange production process is divided into forging, casting, cutting system, the four volumes. The main standard of anti-corrosion: flange hubbed threaded steel pipe flanges, steel pipe welding flange hubbed steel pipe flanges etc..

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The structure of welded elbow

The welded elbow can be welded on the pipe or steel plate after cutting, and the specification can be very large. The number of bends and bending radii are determined by the manufacturer.

The appearance of welded elbow is fixed, of course, the general appearance of the welded elbow is different according to the steel pipe to choose.

In order to protect the appearance of welded elbow, usually after the steel pipe came in, if not washed by the rain, then the welded elbow pushed through the high temperature, the general appearance of the weld is blue. Of course, if it is washed by the rain, we are in the high temperature heating, the heating of the welding elbow surface color is red.

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