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Pressure vessels are vessels or storage tanks that are designed to operate at above 15 p.s.i.g pressures and above 5 cubic feet of volume. In these vessels, a direct source, indirect source or heat from an indirect source is used to obtain pressure. They are available in the shape of closed containers and are designed to hold gases and liquids at pressure different from ambient pressure.
The UAE manufacturers of pressure vessels have gained high reputation in the international market to design and manufacture vessels of high reliability and impeccable quality. Latest software is used by the highly experienced staff to design these equipments. They have a team of skilled workforce and possess excellent welding facilities to manufacture the pressure vessels of high industry standards. These vessels have many applications such as supplying LPG gas to gas store, and their usage in water treatment plants, shipping industry, for refrigeration and many cryogenic applications.
In the industry, it is extremely essential that the pressure vessels are manufactured with high quality. If not manufactured with the required standards, leakage and failure of vessels due to cracking and damaging may happen. Leakage of vessels may cause potential health and safety hazards resulting in explosion, suffocation, poisoning and fire. To ensure health and safety, the pressure vessels should be designed, installed, operated and maintained according to the appropriate code and standard, otherwise it can lead to fatal accidents. For this reason, various engineering authorities legislate and regulate the design, manufacture and operation of pressure vessels.
The usage of pressure vessels ranges from compressed air receiver to hot water storage tanker. Some of the examples of pressure vessels include recompression chambers, nuclear reactor vessels, distillation towers, submarines, petrochemical plants, mining operations, space ship habitats and also the vessels used for storing liquefied gases such as ammonia, butane, chlorine, LPG and propane. They are extremely important vessels that are used in oil refineries where they are used for many purposes such as for storing feed, reactors, fractionation towers and separators. Highly advanced technologies as well as online inspection techniques are used to prevent their failure. One of the main techniques used is ultrasonic testing with which thickness of metal can be tested. Other methods used to monitor the pressure vessel include making use of pressure relief valves and installing sentinel holes and corrosion coupons. Other than this, hydrostatic testing is the preferred test because it is considered to be safer method of testing.
Operational standards of pressure vessels are regulated by codes that ensure designing of pressure vessels for their safe operation at the specified pressure and temperature. Though these vessels can be of any shapes but usually, they are made in shapes of cones, spheres and cylinders. They are not made in complicated shapes because firstly, it is difficult to construct complicated shapes and secondly, it would make it difficult to analyze them for their safe operation. The head shapes of these vessels are usually circular, round or like a dish. A spherical shaped pressure vessel is difficult to manufacture than a cylindrical vessel and is thus comparatively more expensive though it has two times more strength than cylindrical vessel. For these reasons, most of the vessels are cylindrical in shapes.
It is the responsibility of the owner of pressure vessel to obtain periodic inspections and obtain Certificate of Inspection and pay the required fee for that. Also, he should obtain proper repairs and involve the Commissioned Inspector for all the repairs. Moreover, it is the duty of the owner to notify the concerned authority in case of an accident. The pressure vessels supplied by the UAE manufacturers are approved by the safety organizations and the reputed inspection agencies.
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