ASME Tank Heads

The ASME tank head, also known as the ASME tank end cap, refers to the element used to close the end of the pressure vessel to isolate the internal and external media. It is an indispensable and important component of pressure vessel equipment in petrochemical, metallurgy, medicine, food, engineering equipment and many other industries.

1. Pressure vessel

When installing the ASME tank head of a pressure vessel, it is generally necessary to install it at both ends of the vessel. Depending on the type and function of the vessel, the installation position is also different:

(1) The flat head is generally installed on the top of the pressure vessel, which can play a role in covering the top.

(2) The spherical head is generally installed at the bottom of the vessel, which can play a role in stabilizing the vessel.

(3) The elliptical or semi-elliptical head is installed on the top of the vessel, which can reduce the stress concentration on the top of the vessel.

2. Heat exchanger

When installing the dish head of a heat exchanger, it is generally necessary to install it at both ends of the heat exchanger. Depending on the type and function of the heat exchanger, the installation position is also different:

(1) The shell and tube heat exchanger with fixed fin tube bundle is generally fixed on the manufacturing frame, and the head is installed at both ends, which can play a role in sealing the tube bundle and the shell respectively.

(2) The spherical head of the floating head heat exchanger is installed on the floating head, which can freely expand and contract with changes in temperature and pressure.

(3) The head of the flat plate heat exchanger is generally installed on the side, which can play a role in sealing the tube bundle and the shell.

3. Reactor

When Dalian Dingjin installing the reactor head, it is generally necessary to select according to the structure and use environment of the reactor. Generally speaking, the reactor head should be installed above the reactor cover, which can play a role in stability and sealing.

The United States is the first country in the world to develop pressure vessel regulations. From the end of the 19th century to the beginning of the 20th century, boiler and pressure vessel accidents occurred frequently, causing serious casualties and property losses. In 1911, the American Society of Mechanical Engineers (ASME) established the Committee on Boilers and Pressure Vessels to develop and interpret codes for the design, manufacture, and inspection of boilers and pressure vessels.

In the spring of 1915, the world's first pressure vessel code appeared, the Boiler Construction Code ·1914 edition. This was the beginning of the volumes of the ASME Boiler and Pressure Vessel Code (hereinafter referred to as the ASME Code), which later became ASME Code Volume I, Power Boilers.

At present, there are 12 ASME codes, including boiler, pressure vessel, nuclear power plant, welding, materials, non-destructive testing and other contents, which are large and rich, and are updated in a timely manner, and comprehensively include the requirements of boiler and pressure vessel quality assurance. A new edition of the ASME code is published every three years (changed to every two years after 2013), and is updated twice a year. Formally, the ASME Code is divided into four levels: Code, CodeCase, Interpretation, and Addenda.

ASME codes related to the design of pressure vessels are mainly part II "Materials", part III "Rules for the construction of nuclear Power plant components", Part V "Non-destructive testing", Part VIII "pressure vessels", part X "glass fiber reinforced plastic pressure vessels", part XI "Nuclear power Plant components in use inspection Rules" and Part XII "Rules for the construction and continuous use of mobile vessels". Chapter VIII is divided into three volumes: Volume 1 "Pressure vessels", volume 2 "Another Rule for Pressure vessels" and volume 3 "Another rule for High pressure vessels", respectively referred to as ASMEⅧ-1, ASMEⅧ-2 and ASMEⅧ-3.