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Heat exchanger repair

services Heat exchanger repair Available from Team Co. :

Stage 1 Goods Received On completion of regasketing, the plate pack is jig clamped to ensure correct alignment, and is then placed in the oven at the appropriate Temperature to ensure full curing of the adhesive.
Stage 2 Plate Cleaning Prior to regasketing, each plate must pass a three stage inspection encompassing visual corrosion, channel deformation, and a dye penetrant check to highlight the minute pinholes and cracks that can result from excessively corrosive applications.
Stage 3 Inspection : We inspect all the parts separately. In the surface inspections, we identify the damaged and corroded points.
Stage 4 Regasketing After final inspection, the reconditioned plates are ready to be promptly dispatched to the customer. Replacement of shells and tubes is done according to the instructions specified and provided by the customer.
Stage 5 Oven Curing Date-stamped gaskets are selected from our extensive stock and bonded to the plates. Our experienced team uses strong adhesives including heatcured cement designed for strength. Quality gasket selection ensures performance.

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Descriptions :

Heat exchangers are used to cool or heat one fluid by another without the direct use of heat or cold generators, as well as to recover heat or cold from fluids previously given to them.

Heat exchanger components:

Heat exchangers available in industries and factories, especially the petrochemical industry, are usually of the shell and tube type. The advantages of these heat exchangers can be high contact surface in a small volume, good mechanical design and uniform pressure distribution. It can be said that the structure of the transducers consists of a number of tubes that are placed inside a cylinder, and two desired fluids, one cold and the other hot, without colliding directly with each other. Through the metal wall, the pipes will exchange heat with each other, in other words, one of these two fluids will flow in the pipes and the other around the pipes, inside the shell.

According to the description, the components of a heat exchanger are:

Connections
Tube Sheet
Gaskets
Shell Head
Mounting
Mounting
Baffle
Shell
Tube Bundle

Flow in pipes and shells:

In the shell of a passage, fluid enters from one end of the transducer and exits from the other end. In a heat exchanger, two passes are required for the fluid to enter and exit from one end. The choice of flow order in the shell depends on the amount of cooling or heating as well as the pressure drop required and the type of work. For example, a kettle-type boiling converter is suitable for evaporating currents in the shell.

1 to 16 passes may be used for flow in pipes. In a heat exchanger that has two passages, the fluid flows between half of the pipes in one direction and between the other half of the pipes in the opposite direction. Doing so requires a split page in the input channel.

Types of tube and shell converters:

Identify the type and size of shell and tube converters:

The size of the converter according to the TEMA code is determined by the diameter of the shell and the length of the pipes in inches, the converter with the size of 192-23 has a diameter of 23 and the length of the pipes is 192 inches. Depending on the type of Stationary Head, the type of shell (Shell Type) and the type of end head (Rear Head), the type of converter is determined by three Latin letters. For example, a 192-17 AES converter has a 17-inch-diameter shell. This converter has a channel and a detachable cap and has a shell with one passage and a floating head with two half rings.

Application of each heat exchanger:

In general, each of the heat exchangers is used for heating or cooling the flew.

Cooling heat exchangers:

Cooler : In this type of converter, the temperature is reduced without changing the fluid state. In other words, part of the perceived heat of the fluid is taken. If the cooling operation is done by water, it is called water cooler and has the normal structure of shell and tube heat exchangers.
Condenser : The job of this transducer is to convert steam into liquid, and therefore it is necessary to absorb the latent heat of evaporation of a steam to become liquid. This converter can have a building of one type of water or air coolers and is usually installed horizontally.
Chiller : We know that any liquid that we want to evaporate needs thermal energy, and if it takes this energy from the environment, the environment will inevitably cool down. In the oil industry, petroleum liquids such as propane and butane, which evaporate under normal conditions, are used to produce cold. The coolant has a shell and tube structure and at the top of the shell has a space for propane to evaporate. Propane liquid enters from the bottom of the transducer and evaporates around the pipes and produces cold.

Cooling heat exchangers:

All heat exchangers that are responsible for raising the temperature of materials are heaters. Such as boiling, evaporating, furnace, etc.

Reboiler : Unlike a vaporizer, this converter converts only a portion of the entire liquid to a vapor state. Boilers usually have a tube and shell structure and are attached to the bottom of the separation tower. Detergents are found in three different types in the oil industry.
Thermosyphon : It is usually installed vertically next to the tower. The flow of liquid from the bottom of the tower to the pipes is based on the siphon property. In this way, partial evaporation of the liquid inside the tube is based on the siphon property. In this way, the partial evaporation of the liquid inside the pipe by the hot fluid causes the liquid level in the heat exchanger to be lower than the tower, and this surface difference will cause the liquid to flow from the tower to the heat exchanger.

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