-
-
Blogs
-
Equipment
-
Contact
Upholding the corporate spirit of “Integrity, Harmony, Pragmatism, and Innovation,” we remain committed to a business philosophy that puts people first, embraces technological innovation, and emphasizes integrity and pragmatism.
What is a head?
Release time:
Oct 14,2021
A head refers to a component used to seal the end of a vessel, isolating the internal and external media; it is also known as an end cap. The heads of cylindrical vessels are generally rotational shells. According to the shape of their surfaces, heads can be classified into convex, conical, flat, and combined types. A convex head is one whose outer surface has a convex shape, such as hemispherical, elliptical, dish-shaped, or seamless spherical heads. Some gas cylinders employ combined-bottom heads with the convex surface facing inward, which not only ensures structural strength but also meets the requirements for safe use.
A head refers to a component used to seal the end of a vessel, isolating the media inside and outside the vessel; it is also known as an end cap. The heads of cylindrical vessels are generally rotational shells. According to the shape of their surfaces, heads can be classified into convex, conical, flat, and combined types. A convex head is one whose outer surface has a convex shape, such as hemispherical, elliptical, dish-shaped, or seamless spherical heads. Some gas cylinders employ combined-bottom heads with the convex surface facing inward, which not only ensures structural strength but also meets the requirements for safe use.
The head is a component of a vessel that is joined to the cylindrical shell by welding. Depending on their geometric shapes, heads can be classified into several types, including spherical, elliptical, dish-shaped, hemispherical, conical, and flat covers. Among these, spherical, elliptical, dish-shaped, and hemispherical heads are collectively referred to as convex heads. In terms of welding methods, heads can be further categorized into butt-welded heads and socket-welded heads. These heads are used in a wide variety of vessel equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation devices. Materials used for heads include carbon steel (e.g., A3, 20#, Q235, Q345B, 16Mn), stainless steel (e.g., 304, 321, 304L, 316, 316L), alloy steels (e.g., 15Mo3, 15CrMoV, 35CrMoV, 45CrMo), aluminum, titanium, copper, nickel, and nickel alloys.
Usage:
The head is an essential component that cannot be omitted in pressure vessel equipment across numerous industries, ranging from petrochemicals and nuclear energy to food, pharmaceuticals, and more.
A head is an end closure used on pressure vessels and serves as a primary pressure-bearing component of such vessels. Its main function is to provide a seal. First, it forms the top and bottom ends of tank-type pressure vessels. Second, when a pipeline reaches its end and there’s no further need for it to extend forward, a head is welded onto the pipe to create a hermetic seal. Products that serve a similar purpose to heads include blind flanges and pipe caps; however, these two types of products are removable, whereas once a head is welded into place, it cannot be disassembled. The fittings that typically accompany heads include pressure vessels, pipelines, flanges, elbows, tees, crosses, and other related components.
The quality of the head directly affects the long-term safe and reliable operation of pressure vessels.
Execution standard for heads:
Pressure Vessel Heads GB/T25198-2010
Pipeline Standard
GB/T12459-2005
GB/T13401-2005
Power standards
DL/T695-1999
D-GD87-0607
Petroleum standards
SH3408-1996
SH3409-1996
You can also learn more about industry trends.
Phone -8615226756063
Phone -8616631731810
Email -czlsg@163.com
Add: Industrial Zone, Yanta Road, Yanshan County, Hebei Province
