Ellipsoidal Head, Hemispherical Head, and Torispherical Head are three types of ASME Pressure Vessel Dished Heads. Hemispherical Head (also called hemispherical tank heads or hemispherical dish ends) is widely applied to make pressure tanks to store liquids.
Our main products are dish head, hemispherical head, spherical head, elliptical head, conical head, flat head, ellipsoidal dish, flat bottomed head, head with manhole, expansion joint, flanged head, torispherical head, tank heads, pipe end caps, stainless steel dished end head cap, large-diameter elliptical head, pipes capes with thread, etc. with different kinds of material, which are widely used in boilers and pressure vessels in diverse industries in the world. The wall thickness of hemispherical heads is according to ASME Code Section VIII Division 1.
Size range: 50mm-10,000mm with integral formed, larger sizes with subsection formed can be specified. Thickness: 2mm-200mm Standard: ANSI, ASME, MSS, API, DIN, JIS, BS, AWWA
Material: stainless steel, carbon steel, aluminum, special steel, etc. Application of the Ellipsoidal Head: in diverse industries such as oil, chemical, winery, pharmaceutical, environmental, and military.
The head plate is a part of the vessel or tank. It is a cylinder connected by welding. According to different geometric shapes, the head plates can be divided into hemispherical head, spherical head, elliptical head, conical head, flat head, ellipsoidal dish, flat bottomed head, etc.
The welding process includes butt welding head plates and socket welding head plates. It is used in various pressure vessel equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation equipment.
According to the welding process, it includes: butt welding head plates and socket welding head plates. It is used in various pressure vessel equipment, such as storage tanks, heat exchangers, towers, reactors, boilers, and separation equipment.
The material of the head plates includes carbon steel (A3, 20#, Q235, Q345B, 16Mn, etc.), Stainless steel (304, 321, 304L, 316, 316L, etc.), Alloy steel (15Mo3 15CrMoV 35CrMoV 45CrMo), Aluminum, titanium, copper, nickel, and nickel alloys, etc.
What is the difference between the head plates and the piping caps? The summary of the difference between the piping caps and the head plates. The head plates and the piping caps look very similar, and the difference between them is mainly in the size of the inner diameter and the scope of use. Normally, the pipe cap is just the plug of the pipe, and the inner diameter of the pipe cap is ≤DN300. Whereas, the head plates inner diameter > DN300. In theory, the diameter of the butt welding head plates can be infinite. Under normal circumstances, its maximum diameter can be about DN10,000.
The calculation method of workpiece size of the head plates: The head plates diameter ≤ 1200: Di×1.2+80 Head diameter > 1800: Di×1.17+80 The Weight calculation (cutting size ÷ 2) × (cutting size ÷ 2) × coefficient (carbon steel 7.85-stainless steel 304, 7.93-special, 7.98) × 3.14 × thickness
The weight of the spherical head plates without straight edge=7.85δnΠ (Di+δn) 2 /2 Where δn-thickness of steel plate. Π-Pi. Nominal diameter of Di spherical head plate. If it has a straight-sided spherical head plate, plus the straight-sided weight, the types of pressure vessel head plates and their applicability.
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