There is a common saying that paper can't hold fire. It can be seen that paper is flammable. However, Shanghai scientists invented a kind of “fire-resistant paperâ€. Experiments have confirmed that such paper can withstand high temperatures of over a thousand degrees Celsius. According to reports, this “fire-resistant paper†was successfully developed by the Shanghai Institute of Ceramics, Chinese Academy of Sciences, which took six years to complete. The result was also published in “European Chemistryâ€.
our dished heads are used in a variety of applications and industries such as storage tanks, pressure vessels, road tank, food processing operations, chemical plants ,Nuclear operation, Oil Refining, Architectural feature, power generation.
Due to our forming experience and equipment, we can spin or press the first part of the process of forming your products, It depend on the thickness and material performance,
Our main products are 2:1 SE dished heads, Torispherical heads, Cones,Hemispherical Heads etc
Choosing the right type is the key decision for each customer and one for which our experience team to happy to give advice, simple speaking, the torispherical heads, the less ressure it can withstand, Conversely, the deeper dished heads, for example Elliptical heads, hemispherical, the greater pressure it can take.
Our in house-capability to form dished heads by cold press brings major benefits to our customers and sets us apart from others dished heads manufactures
For carbon steel dished heads, we can forming this dished heads from 76-9000mm in diameter and below 250mm in thickness
The general forming process as the below sketches
Technical Delivery Condition
2,Enquiry/order required information
We can give our clients once they gave us the below information
But if clients tolerance is higher than below Hokkai standards, it shall be provided to Hokkai prior to offer or ordering.
Special Material Torispherical Head Special Material Torispherical Head,Cold Press Forming Torispherical Head,Special Material Tiianium Torispherical Head,Best Special Material Torispherical Head YIXING HOKKAI HEAD PLATE CO.,LTD , http://www.hokkaidishedend.com
Fireproof paper has many uses Compared with ordinary paper, the production principle of "refractory paper" is similar, but the production materials are different. It not only can be used as a permanent and secure information storage medium to store important texts, documents, files, etc. for a long time, but also can be used as a regenerable adsorbent, controlled-release carrier, bone defect repair material, and medical treatment for effective removal of organic pollutants from wastewater. Paper, fire-retardant materials and high-temperature materials.
Zhu Yingjie, a researcher at the Shanghai Institute of Ceramics, said: "Hydroxyapatite is a natural mineral. It is the main inorganic component of vertebrate bones and teeth. It has excellent biocompatibility and environmental friendliness. The white color, which has the excellent characteristics of long-term storage and easy discoloration, is conducive to the long-term preservation of paper documents. However, hydroxyapatite also has its drawbacks - high brittleness and low toughness.
Through repeated experiments, Zhu Yingjie’s research team finally found a new method of preparation: using calcium oleate as a precursor to prepare ultra-long hydroxyapatite nanowires that can be precisely regulated, and used it as a building material for new types of paper. The hydroxyapatite "fire-resistant paper" was prepared using a simple vacuum filtration technique.
At present, this kind of highly flexible hydroxyapatite "refractory paper" is still limited to laboratory-scale preparation, but in the future if it can achieve large-scale production and use, Zhu Yingjie believes that it can not only drastically reduce human to traditional plant fibers. The dependence of plain paper can also reduce environmental pollution to a certain extent, so as to benefit future generations. 
1,Our material (hot Rolled Unalloyed structural steel, high and low temperature steel, High Alloy steel)
We have no carbon steel plates in our stock and most of plates are from Chinese steel market or mill. Meanwhile As Japanese owed company, We can also source the plates from Japanese ex-mill if end user can`t accept ex-chinese mill.
Basically the delivery time shall be below 20days for dished heads if plates are from steel market. and Max plates width from them is below 2200mm. it means that the seamless dished heads diameter shall be below about 1800mm.
The max width CS plates that Chinese mill can do is below 4700mm,and dished heads can be seamless below 3800mm in diameter.
