Basic Concept and Most important Component of Stress Piping

In our every day living, we have all ever observed all sorts of pipes used for transporting various medium out of industrial function or living aim. A number of them are Pressure Piping. Stress piping refers to tubular gear with nominal diameter not bigger than 25mm which might be applied for transporting gas or liquid by taking use of specific pressure. The application range is regulated amongst gas, liquefied gas, steam medium with highest functioning pressure not greater or equal to 0.1MPa or combustible, explosive, toxic or erosive liquid medium whose functioning temperature is higher or equal to normal boiling point. That's to say, currently so called ‘Pressure Pipes' not only mean that interior or external pipes sustain the pressure but medium transported interior is ‘gas, liquefied gas and steam' or ‘fire blast, toxic or erosive liquid'.

Pipes transportation is one of five major transportation industries paralleled by railway, highway, waterway and aviation. As a type of special transportation gear, pipes are widely applied in industries like chemical industry, petrochemical, petroleum, electric power, light industry and metallurgy. In cities and towns, it is applied in fuel gas, heat and water supply as well as water drainage. With the development of social economy, pipes function is more obvious and is viewed as ‘factory blood vessel'. At the same time, the problems caused by it are also increasing. In order to prevent and reduce incidents and guarantee lives and properties security, major industrial countries covering America, Japan and Germany all list Pressure Piping as the special equipment containing many unsafe factors. They legislate to practice security supervision on it.

Stress pipes are one part of the pipelines. Pipeline is the stress fitting assembly composed of pipes such as Composite Pipes, pipe fittings some may be black pipe fittings, flange, bolt, gasket, valve and other components or stress parts and supporting parts. A pipeline system, in order to fulfill functions like liquid transportation, allocation, blending, separation, discharge, measure and fluid flowing control, must connect with corresponding dynamic gear, reaction equipment, storage equipment, separation equipment, heat exchange equipment and control equipment so as to develop into a system, ensuring liquid in pipes are of particular stress, temperature and flow. As a result, it finishes designed and scheduled tasks.

Pressure Pipes system refers to the system composed of pipe element, pipe supporter, security protection gear and auxiliary devices. Here rubber end caps and pipe end caps all belong to pipe component. Frequently observed stress pipes mainly include pipes, pipe fittings, flange, valve, compensator, flame arrester, sealing element, supports and hangers. Security protection device refers to over-temperature and ultra-pressure controlling device and warning device such as security valve, stress gage, rupture disc and emergency cutting valve. The auxiliary device mainly means pipeline oriented device, support post, cathodic protector of stress pipes. They may be cathodic protecting device, compressor station, pump station, valve station, stress adjusting station and supervision system.