Sealing grade and selection of valves

Sealing grade and selection of valves

Sealing grade and selection of valves Valve is an important component in the piping system of petrochemical plant. It is one of the main leakage sources in the plant with many kinds and large quantity. Therefore, the leakage requirement of valve is very important. Valve sealing performance ...

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Selection and application of strainer

Selection and application of strainer

Strainer is an indispensable device in the medium pipeline. It is usually installed at the inlet of pressure reducing valve, pressure relief valve, constant water level valve, square strainer and other equipment. The strainer is composed of cylinder, stainless steel strainer screen, blowdown ...

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Installation position of check valve

Installation position of check valve

Let’s discuss the installation position of the check valve today. So how to determine the installation position of check valve? What is the difference between the installation before the pump and the check valve after the pump, and where is the pre ...

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How to install weld neck flange and flat welding flange

How to install weld neck flange and flat welding flange

Flange is a common part in piping system. They are mainly used to connect shafts and shafts or to connect two devices. In general, flanges are used with gaskets and bolts. The purpose is to fix two pipes, pipe fittings or equipment on the flange, ...

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The essence of pipeline valve

The essence of pipeline valve

The essence of pipeline valve In the pipeline system, the valve is the control element, just like the human hand, so whether in life or in all walks of life, its importance is self-evident. What are its functions? How to install pipeline valve? Next, let’s ...

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The problem of heat treatment defects of medium thick steel plate and its treatment method

The problem of heat treatment defects of medium thick steel plate and its treatment method

With the development and progress of medium thick steel plate technology, people pay more attention to the product quality, and the production enterprises pay more attention to the requirements of product quality and energy saving. From the current development situation in the ...

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Influence of forging on metal structure and properties of forged flanges and its defects

Influence of forging on metal structure and properties of forged flanges and its defects

Effect of forging on microstructure and properties of metal In forging production, in addition to ensuring the required shape and size of forged flanges, it must also meet the performance requirements of parts in the process of use, which mainly include: strength ...

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What is quenching, tempering, normalizing and annealing

What is quenching, tempering, normalizing and annealing

The differences of normalizing, tempering, annealing and quenching lie in different processes, different changes of material structure and different results of material properties. What is quenching? Quenching of Steel is to heat the steel to the critical temperature above Ac3 ...

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Main factors affecting flange sealing performance

Main factors affecting flange sealing performance

Bolt pre-tightening force An important factor affecting sealing. The pre-tightening force must compress the gasket to achieve the initial seal. Properly increasing the bolt pre-tightening force can increase the sealing ability of the gasket, because increasing the pre-tightening force can make the ...

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Austenitic stainless steel should also pay attention to: cold work hardening, high temperature aging embrittlement

Austenitic stainless steel should also pay attention to: cold work hardening, high temperature aging embrittlement

The intergranular corrosion tendency test of stainless steel is a common content in design documents, and the relevant content in standards such as HG/T 20581 is relatively clear. The water pressure test or the chloride ion content in the operating medium is ...

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