In 2005 the Chongqing municipal government issued the Chongqing Municipal People's government science and technology progress prize two for Chongqing gas group manufacturing 10000m3 natural gas spherical tank.

 

In 2008 our company for the Tianjin petrochemical manufacturing of 15MnNiNbDR steel at low temperature 2000m3 ethylene spherical tank, issued by Chinese won the Steel Structure Association awarded the "China steel structure science and Technology Association two award" and the Anhui Provincial People's Government of Anhui province science and technology award"

2011 Nanjing China oil measurement test center made 10m3 primary tank west east gas pipeline, the maximum design pressure (9.8MPa) and minimum diameter (2700mm), the successful production of this product solves the problem of high precision large caliber flowmeter natural primary standard, the product is the world's fifth, the first China qualified for pressure container weighing of natural gas, it successfully developed, not only to fill the gaps in gas flow measurement and advanced engineering, in order to achieve even beyond the domestic industry technical level and lay a solid foundation. At the same time also realized 10m3 primary tank localization, finished products rely on imports situation. This product in 2012 by the China Chemical Equipment Association identified as the product manufacturing technology advanced, to fill the gaps in the domestic, reached the international advanced level of similar products. Its successful development, and promote the technical progress of the industry, with good economic and social benefits".

Pressure vessels are pressure vessels that may have an explosion and other hazardous accidents. Pressure vessel containing medium special (flammable, explosive, toxic, corrosion, etc.) once the accident, the destruction of power, the impact is also great. In order to improve the safety of the pressure vessel, to ensure the normal production and construction, the company must carry out the production of product knowledge training.

Low temperature operation of pressure vessel with decreasing temperature, the container used steel and its weld will change from ductile brittle state, the compression element in tensile stress under the action of stress levels below the yield strength of the material, or less than the allowable stress under the condition of sudden brittle fracture. After this break, no or only minimal local plastic deformation, but no overall yield, imperceptible in daily life, but often a catastrophic accident, and even pose a great threat to the safety in production. Therefore, compared with the non cryogenic pressure vessel, the design, manufacture and inspection of low temperature pressure vessel are more strict.

With the increase of the scale of petrochemical plant, the volume of the container increases, the pressure vessel is more and more in the field assembly welding, and the blocking of the large diameter nozzle on the container is the difficult point of pressure test.