Head is a part of the container according to the different geometric shapes, can be divided into spherical, hemispherical, barrel body, ellipsoidal, dish, spherical cap-shaped, cone shell and flat cover.Usually used in tank, heat exchanger, tower, reactor, boiler and separation equipment.

Non-straight head

Non-straight head also called spherical cap-shaped head

The characteristic of no straight head: forged well, smooth surface, resistance to acid, alkali and high temperature, reasonable price, attractive appearance and strong texture performance.

Spherical head

Spherical head: The head formed by the cap-shaped of a spherical shell. There are two kinds of hemispherical head and non-foldable spherical head. Pressure vessel usually uses hemispherical head as the dish end. It’s advantage is the smallest surface area under the same volume and the thickness required under the same pressure condition is the thinnest. From the point of view of saving material and strength is the most reasonable. Non-foldable spherical head is connected with simple fillet weld. It is commonly used as the middle head of two independent pressure chambers in the vessel, or as the end head.

The spherical head looks like a ball, so it is called a spherical head

Common standard: JB/T4746-2002, JB/T1619-2002,GB16749-1997

Inspection standard: JB/T4746-2002, JB4730-94

Carbon steel head

The carbon content is less than 1.35%, in addition to iron, carbon and marginal Impurities such as silicon, manganese, phosphorus and sulfur, it is steel without other alloying elements. What’ more, the performance of carbon steel mainly depends on the carbon content. With the increase of the carbon content, the strength and hardness of steel will lead to the decrease of plasticity, ductility and weldability. Compared with other kinds of steel, carbon steel is the earliest used with low cost, wide performance range and the largest consumption. According to the carbon content normally is divided into low carbon steel(carbon content is 0.04%~0.25%), medium carbon steel(carbon content is 0.25%~0.6%), high carbon steel(carbon content is 0.6%~1.35%). According to the quality is divided into common carbon steel, the content of harmful impurity phosphorus and sulfur are less than 0.05%, including A-type steel (A-type steel, guarantee the mechanical property), B-type steel(B-type steel, guarantee the chemical composition) and special type steel(C-type steel, guarantee the mechanical property and the chemical composition), harmful impurity phosphorus, sulfur content of high quality carbon steel are both less than 0.04%, harmful impurity phosphorus, sulfur content of senior high quality carbon steel are both less than 0.03%.

Stainless steel head

The other name of stainless steel head: Stainless steel non-straight side head, barrel body side, elliptical head, shallow head, all kinds of head side, stainless steel head side, flat bottom, hemispherical side, spherical head.

Specification：Ф32-10000

Material：304, 304L, 321, 316, 316L, 310S, 00Cr18Ni5Mo3Si2 (UNS S31500) (3RE60) , 630, 00Cr22Ni5Mo3N (UNS S31803/S32205) (SAF2205), 00Cr25Ni7Mo4N (UNS S32750) (SAF2507)304, 1Cr13, 2Cr13, 3Cr13, 1Cr17Ni2, dual-phase steel, antibacterial steel and other materials.

Common standard: JB/T4746-2002

Application range of stainless steel head: petroleum, electronics, chemical industry, medicine, textile, food, machinery, construction, nuclear power, aerospace, military, etc,.