flange

When purchasing tube sheets, careful consideration and comparison should be made to ensure the selection of the correct product for the intended application. Whether used in heat exchangers, boilers, or pressure vessels, tube sheets play a crucial role in the overall performance and efficiency of equipment. The following are some important factors to consider when selecting the appropriate tube sheet: Material Selection: The material of the tube sheet should be compatible with the fluid or gas flowing through the pipeline. Factors such as corrosion resistance, thermal conductivity, and mechanical properties should be considered. Common materials used for tube sheets include carbon steel, stainless steel, copper alloys, nickel alloys, aluminum alloys, and titanium.   Tube Arrangement: The tube sheet design should accommodate the desired tube arrangement, whether it's a triangular, square, or staggered pattern. The number and size of tube holes should be carefully specified to ensure proper tube fit and alignment. Thickness and Strength: The tube sheet should have adequate thickness and strength to withstand the operating conditions and pressures within the equipment. The required thickness should be determined according to engineering calculations and standards, based on diameter, material, and pressure ratings.   Weldability: If it is necessary to connect the tubes to the tube sheets by welding, the material should have good weldability. Some materials may require preheating or post weld heat treatment to maintain the integrity of the joint.   Cladding or Coating: In applications where corrosion resistance is crucial, in order to reduce the use of high corrosion-resistant materials for the whole tube sheet, the tube sheet can be coated or clad with a higher alloy material. This provides effective protection against corrosive fluids or environments and extends the service life of the tube plate. The materials used for coatings usually include stainless steel, nickel, titanium, etc.   Quality Assurance: It is important to purchase tube sheets from reputable manufacturers or suppliers who comply with industry standards and quality control processes. Wuxi Changrun has 30 years of production experience and supply flanges, tube sheets, for well-known petrochemical industry giants in various countries, including PetroChina and Sinopec, BASF, Bayer, Chevron, Mobil, etc.    Customization: In some cases, it may be necessary to customize the designed tube plate to meet specific project requirements. Collaborating with experienced engineers and manufacturers can help design and manufacture customized tube sheets. Wuxi Changrun has a professional team of engineers and technicians who can manufacture customized products according to customer needs.   It is recommended to consult with industry experts, engineering consultants, or equipment manufacturers to ensure that the selected forged tube sheet meets the desired performance and longevity requirements. By considering these factors, the right tube sheet can be chosen to enhance the overall efficiency and reliability of the equipment in which it is used. Get more details from www.wuxichangrun.com.

Flammable and explosive high-pressure pipelines in petrochemical industry require weld neck flanges Petrochemical pressure pipeline components are used to connect or assemble pressure bearing and sealed pipeline system components, including pipes, fittings, flanges, gaskets, fasteners, valves, joints, hoses, traps, filters, separators, etc. Among them, flammable and explosive high-pressure pipelines require forged weld neck flanges.   Seals for flammable and explosive high-pressure pipelines in petrochemical industry include flange sealing surfaces, flange gaskets, and fasteners. The flange sealing surface forms include flat face (FF), raised face (RF), ring joint face (RTJ), tenon groove, special groove, etc. The flange gasket includes flat gasket, spiral wound gasket (with inner and outer rings), and metal gasket (oval, octagonal).     High quality butt welded flanges should meet the following requirements: 1.No defects such as cracks, shrinkage, slag inclusion, and cold-lap; 2.The depth of rust, dents, and other mechanical damage should not exceed the negative deviation of wall thickness allowed by the product standard; 3.The machining accuracy and roughness of threads, sealing surfaces, and grooves should meet the requirements of the design documents or product standards; 4.The weld seam should be well formed and smoothly transition to the base metal, without defects such as cracks, lack of fusion, and incomplete penetration; 5. Metal bellows expansion joints, spring supports and hangers, and other shipping parts or positioning pin blocks should be complete and free of looseness.       The compliance of flanges, blind flanges, and stub end can be determined through the following visual inspections: a) The sealing surface should be flat and free of rust and radial scratches; b) The outer edge of the flange and flange cover should have a permission mark; c) The product standard number, nominal size, nominal pressure, material, and sealing surface type code should match the quality certificate.       Standard class rating of flanges According to the different nominal pressure ratings of valves, flanges with different pressure ratings are configured in pipeline flanges. Several commonly used flange pressure ratings are classified according to international standards According to ASME B16.5, steel flanges have 7 pressure ratings: Class150-300-400-600-900-1500-2500 (corresponding to Chinese standard flanges with PN0.6, PN1.0, PN1.6, PN2.5, PN4.0, PN6.4, PN10, PN16, PN25, PN32Mpa ratings)

What are the tube sheet inspection and testing methods? Tube sheet inspection and testing methods are used to ensure the integrity and safety of tube sheets, which are components used in heat exchangers and other types of equipment. There are several methods used for tube sheet inspection and testing, including:   Visual Inspection This is the simplest method of tube sheet inspection, which involves a visual examination of the tube sheet surface for any visible cracks, corrosion, erosion or other signs of damage.   Dye Penetrant Test (PT) This method involves applying a dye penetrant to the surface of the tube sheet and then wiping off the excess. The penetrant is then drawn into any cracks or other surface defects by capillary action. A developer is applied, which draws the penetrant out of the cracks and makes them visible.   Magnetic Particle Test (MT) This method involves applying a magnetic field to the tube sheet and then applying ferromagnetic particles to the surface. Any surface cracks or defects will cause the magnetic field to be distorted, making the particles cluster at the location of the defect, which can then be visually detected.   Ultrasonic Testing (UT) This method uses high-frequency sound waves to detect defects in the tube sheet. A probe is placed on the surface of the tube sheet, which emits sound waves that travel through the material. Any defects in the material will cause some of the sound waves to be reflected back to the probe, which can be detected and analyzed.   Eddy Current Testing (ECT) This method involves passing an alternating electrical current through a coil, which induces eddy currents in the tube sheet. Any defects in the material will cause changes in the eddy currents, which can be detected and analyzed.   These methods can be used individually or in combination to provide a comprehensive inspection and testing of tube sheets. The choice of method(s) used will depend on the type of equipment, the material of the tube sheet, and the level of sensitivity required for defect detection.   Wuxi Changrun has provided high-quality tube sheets, nozzles, flanges, and customized forgings for heat exchangers, boilers, pressure vessels, etc. to many well-known petrochemical enterprises at home and abroad. Our customers include PetroChina, Sinopec, Chevron, Bayer, Shell, BASF, etc. Send your drawings to sales@wuxichangrun.com We will provide you with the best quotation and the highest quality products.    

What is heat exchanger baffle? A heat exchanger baffle is a plate or barrier that is inserted into a heat exchanger to enhance heat transfer efficiency. The primary function of a baffle is to direct the flow of fluid inside the heat exchanger in a specific pattern, such as cross-flow or counter-flow, to maximize heat transfer.   Baffles are commonly used in shell and tube heat exchangers, which consist of a bundle of tubes enclosed in a shell. The baffles are placed inside the shell, perpendicular to the tube bundle, and divide the shell into several chambers. The fluid flows through the tubes and is directed by the baffles through each chamber, which increases the time the fluid spends in contact with the tube surface, thereby enhancing heat transfer efficiency.       The types of baffle plates The design and placement of baffles in a heat exchanger depend on the specific application requirements, including the type of fluid being heated or cooled, the flow rate, temperature, and pressure, and the desired heat transfer rate. The size, shape, and thickness of the baffles may also vary depending on the application. The baffle plate is installed on the shell side, which can not only improve heat transfer efficiency but also play a role in supporting the tube bundle. There are two types of baffles: arched and disc-shaped. Arched baffles are available in three types: single arched, double arched, and triple arched.     What is the function of a baffle? 1. Extend the flow channel length of the shell side medium, increase the flow velocity between tubes, increase the degree of turbulence, and achieve the goal of improving the heat transfer efficiency of the heat exchanger.   2. Setting baffle plates has a certain supporting effect on the heat exchange tubes of horizontal heat exchangers. When the heat exchange tube is too long and the pressure stress borne by the tube is too high, increasing the number of baffle plates and reducing the spacing between baffle plates while meeting the allowable pressure drop of the heat exchanger tube side can play a certain role in alleviating the stress situation of the heat exchange tube and preventing fluid flow induced vibration.   3. Setting baffle plates is beneficial for the installation of heat exchange tubes.       Heat exchange baffles can be made of various materials, such as stainless steel baffle plates, carbon steel baffle plates, or titanium baffle plates, depending on the corrosive or erosive nature of the fluid being processed. In some cases, baffles may also have holes or slots to allow for more fluid flow and heat transfer.   Wuxi Changrun has provided high-quality baffle plate, tube sheets, nozzles, flanges, and customized forgings for heat exchangers, boilers, pressure vessels, etc. to many well-known petrochemical enterprises at home and abroad. Our customers include PetroChina, Sinopec, Chevron, Bayer, Shell, BASF, etc. Send your drawings to sales@wuxichangrun.com We will provide you with the best quotation and the highest quality products.