Fixed tube sheets can be used in fixed shell and tube heat exchangers, U-tube heat exchangers or floating head shell and tube heat exchangers. Among them, the Floating Head Heat Exchanger needs a floating Tube Sheet and a fixed tube sheet, and the other two shell and tube heat exchangers only need a fixed tube sheet.
In the calculation of the fixed tube sheet, the axial stress of the shell, the axial stress of the heat exchange tube, and the pull-off force q between the heat exchange tube and the tube sheet are calculated according to various working conditions with temperature difference. When the strength (or stability) conditions are met, expansion joints are required. In the calculation of the strength of the fixed tube sheet, when the thickness of the tube sheet is determined and no expansion joints are provided, sometimes the strength of the tube sheet is not enough. After the expansion joints are provided, the thickness of the tube sheet may meet the requirements. At this time, expansion joints can also be set to reduce the thickness of the tube sheet, but it should be determined from a comprehensive evaluation of material consumption, manufacturing difficulty, safety and economic effects.
U-shaped expansion joints are commonly used in fixed tube sheet heat exchangers, which have the advantages of compact and simple structure, good compensation, and low price.
With the large-scale chemical equipment and power stations, the diameter of the tube sheet is also becoming larger and larger, and the tube sheet with a diameter of 4m-5m is very common. Large-scale tube sheets are characterized by a large number of tube holes, dense, small aperture, deep, and high requirements for precision and finish.
Production Precision
The tube sheets used for the third and fourth types of pressure vessels require relatively high precision. The traditional hole processing method is to scribe lines by fitters and drill holes with radial arms. With the large-scale chemical container, the diameter of the tube sheet is also increasing, and the thickness is also gradually thickening. The processing of the tube sheet also introduces numerical control technology, and the numerical control drilling machine is generally used for hole drilling and radial drilling for hole processing. The use of machining centers for high-efficiency and high-precision hole processing has gradually been accepted by some large enterprises. The demand for large and heavy tube sheets in the fields of nuclear power, seawater desalination, and central air-conditioning heat exchangers is showing an increasing trend.
Advatage of Our Product
1. The tube holes are treated with oblique openings, and the craftsmanship is excellent.
2. Various sizes and specifications, support customization.
3. Strict selection of materials, strong quality, long product life cycle.
4. The tolerance of hole center can be controled to ±0.1mm, which is more strict than ASME standard.
Standard:
ANSI B16.5/ B16.47/ B16.36/ API605, 6A, 6B/ MSS SP44/ AWWA C207
DIN 2527/ 2528/ 2561/ 2565/ 2566/ 2573/ 2576/ 2627/ 2630/ 86029/ 86030 etc.
BS 4504 PN16/PN40, BS10 TABLE E/TABLE D
JIS/KS 5K, 10K, 16K, 20K, 30K
UNI 2253/2254/2276-2278/2281-2284/6083/6084/6089-6093
GOST 12820/12821
Material Available:
Carbon steel (ASTM A105 A350LF2 LF3 A694 A36 Q235 A3 20# 45# 20Mn 16Mn Q345 etc.);
Stainless steel (SS316, SS304, SS316L, SS304L, SS321 SS317 F51 F53 316Ti etc.);
Alloy steel (A182F5 A182F11 F22 15CrMo 30CrMo 35CrMo 40CrMO 42CrMo 4130 4140 etc.)
PN: 1.0--------58.0
American Series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500, CLASS 2500
European Series: PN 2.5, PN 6, PN 10, PN 16, PN 25, PN 40, PN 63, PN 100, PN 160, PN 250, PN 320, PN 400
Package
The package of tube sheet ban be wooden pallet and cover, and plastic strip for fixing.
About Us
Guangdong Jiema Energy Saving Technology Co., Ltd. (hereinafter referred as Jiema) used to be called Guangzhou Jiema Heat Exchanger Co.,Ltd. As a professional manufacturer of energy equipment, our product range is not only including heat exchanger, Water Chiller and Cooling Tower, but also including the accessories of Seamless Tube, Flange, pipe fittings and so on. Our production line of accessories can meet our own demand as well as our customer's inquiry. We offer competitive price and stable quality for all of our product range.
☏FAQ of Tube Sheet
1. How to judge the quality of tube sheet?
In the inspection process of the tube sheet, the main inspection indicators are the hole position, the hole diameter tolerance, the smoothness in the hole, the presence or absence of burrs, the position of the groove, etc. For the double tube sheet, more attention is paid to the hole position during the inspection process. Hole fit is very important. Generally, it can be guaranteed with a CNC drilling machine. Compared with thick plates, the verticality of holes above 300mm is very important. These thick plates with large diameters require more precise tools and equipment, and the application of special gantry machining centers will become more and more common.
2. What's the method to fix tube on the tube sheet?
One method is by tube to tubesheet welding. Another method is by expandiong tubes, but this way has higher requirement of precision for both tube and tube sheet.
About Us
Contact Now
