企业标准：折流板和支撑板

1、IssueReplacesSupport Plates and Baffles for Straight Tube Heat ExchangersOrig.:Checked:Appr.:Total 4 PagesDescriptors: Support Plate, Straight Pipe, Transverse Baffle, Heat ExchangerIssue 02.91Dimensions in mm and inchContentsPage TOC o 1-5 h z HYPERLINK l bookmark0 o Current Document Scope1 HYPERLI

2、NK l bookmark2 o Current Document Normative references1 HYPERLINK l bookmark4 o Current Document Dimensions of the Support Platesand Baffles1Spacing and Arrangement of SupportPlates and HYPERLINK l bookmark6 o Current Document Baffles2 HYPERLINK l bookmark8 o Current Document Baffle Spacing2Spacing

3、of the Support Plates and Baffles for Kettle-Type-Evaporator2 HYPERLINK l bookmark12 o Current Document U-Tube Rear Support2 HYPERLINK l bookmark14 o Current Document Additional Support for U-Bends3 HYPERLINK l bookmark16 o Current Document Maximal Spacing of Support Platesand Baffles3 HYPERLINK l b

4、ookmark18 o Current Document Types of Baffles41 ScopeThis standard is applicable for the arrangement of support plates and baffles in heat exchangers with straight tubes. It is also applicable for design with U-bends.2 Normative referencesLS 211-02 Hole Diameter, Pitch, Roughness and Tolerances for

5、Tube Sheets, Baffles and Support PlatesAFigure 1: Segmental Transverse Baffles3 Dimensions of the Support Plates and Baffles4Figure 2: Full Support Plates (Kettle-Type)Table 1: Diameter and Wall Thickness of Support Plates and Transverse Baffles according to the Nominal Diameter of the Bundle (Dimen

6、sions in mm)Page 2IssueNominal Diameter of BundleDDiametrical clearance between Shell Inside Diameter and Baffle Outside Diameter 2)Maximal allowable Reduction of the Baffle Diameter during Assembly3)Plate ThicknessTransverse Baffles and Support Plates for Distance A (see figure 1 and 2)1) 4)Longitu

7、dinal BafflesA600600A1200200 to 300324610840032510128500 to 6004351012870054510128800 to 90054810161010005481216101100 to 12006581216101300 to 140065121618101500 to 160087121618101700 to 180087141820121900 to 2100107141820122200 to 2500127141820122600 to 300014714182214Given values are applicable fo

8、r carbon-steel and aluminium. For CrNi-steel the plate thickness may be smaller by 2 mm (minimal thickness 3 mm)If not otherwise specified on the Mechanical Data Sheet. Tolerances for the baffle diameter are +1/-0 mm (to be shown on fabrication drawings by manufacturer!)During assembly of the heat e

9、xchanger the baffles may be ground - as far as required - by maximum the values shown in this column. The extent of reduction by grinding and the circumference-angle-location in a segment shall be included in the workshop test report.For No Tubes in the Windows Type*: For transverse baffles accordin

10、g to figure 1. For support plates between transverse baffles according to figure 24 Spacing and Arrangement of Support Plates and BafflesBaffle SpacingBaffles normally shall be spaced uniformly, spanning the effective tube length. If this is not possible, the baffles near to the tubesheets shall be

11、located as close as practical to the shell nozzles. The remaining baffles shall be spaced uniformly. The spacing shall be in conformity with the requirements of the process calculation.Spacing of the Support Plates and Baffles for Kettle-Type-EvaporatorFor Kettle-type-evaporators A =750 mm may not b

12、e exceeded. For critical Kettle-type-evaporators such as quench oil versus water resp. steam A = 500 mm shall be used.U-Tube Rear SupportThe support plates adjacent to the bends in ll-tube exchangers shall be located in the way, that for any individual bend the sum of the bend diameter and the strai

13、ght length, measured along both legs from the support to bend tangents does not exceed the maximal spacing (span) acc. to Table 3.Additional Support for U-BendsFor U-Bend diameter according following table additional measures for support of the U-Bends has to be provided by the manufacturer. Detail

14、design has to be performed by manufacturerTable 2: U-Bend Diameter which requires additional supportTube Outside DiameterU-Bend Diameter (mmmminchOrientation of U-Bendsverticalhorizontal203/4 1000600251 1200800Maximal Spacing of Support Plates and BafflesMaximal spacing is given in table 3Table 3: M

15、aximal Spacing of support Plates and BafflesTube Outside DiameterMaximal Spacing (Span) for Tube MaterialDNmmNPSinchTemperature Limits (F) un- and high-alloyed steel400(750) low-alloyed steel455(850) Nickel-Copper-Alloys315(600)Nickel455(850)Nickel-Chromium-lron-Allovs538 (1000)Aluminium and Alumini

16、um Alloys (Code) Copper and Copper- Alloys (Code)mmInchmmInch193/41525601320522512000 1)79160564321 1/4223588193076381 1/22540100220987572 1/4350013831001221) 1880 mm (74 inches) according TEMA-StandardFor No tubes in the Windows Type with horizontal baffle cuts additional supports for the upper tra

17、nsverse baffles are required in the case that spacing of lower transverse baffles exceeds spacing as per table 3. This is to avoid bundle bending.Exceeding the Temperature Limits as per Table 3Above the temperature limit as given in Table 3 the maximal spacing shall be reduced. The factor for reduct

18、ion of the maximal spacing values, has to be calculated acc. formula (1):where areEt= modulus of elasticity at the temperature T andETab.= modulus of elasticity at the temperature limit acc. Table 3.Finned TubesFor finned tubes the maximal spacing acc. to Table 3 shall be reduced (interpolated, where appropriate). Outside d