Some standard content:
Industry Standard of the People's Republic of China
Stainless Steel Netted Plate Corrugated Packing
Stainless Steel Netted Plate Corrugated Packing HG/T 21559.1-95
Editor: Chemical Engineering Design Technology Center, Ministry of Chemical IndustryApproving department: Ministry of Chemistry, Ministry of Industry
Effective date: March 1, 1997 Engineering Construction Standards Center, Ministry of Chemical Industry
Additional instructionsProposer, editor and main drafter of this standard
Proposer: Chemical Engineering Design Technology Center, Ministry of Chemical IndustryEditor: Chemical Engineering Design Technology Center, Ministry of Chemical IndustryEditor: Yu Hongshou, Lin Jie
Reviewer: Cheng Ji, Tan Chong, Fei Weiyang, Li Chunfang
Approver: Wang Fuhua
1 Subject content and scope of application
1.0.1 This standard specifies the product type, structural size, manufacturing, inspection, packaging, storage and transportation requirements of stainless steel netted plate corrugated packing.
1..2 Stainless steel mesh corrugated packing is suitable for internal parts of gas-liquid mass transfer equipment. The applicable temperature range of this packing is less than or equal to 400'℃.
: 1.0.3 This packing is suitable for clean systems without solid particles and suspended matter 141
Reference standard
GB4239 "Stainless steel and heat-resistant steel cold-rolled steel strip" 3 Marking, specifications and characteristics
3.1 Marking
HG/T 21559. 1-95-NC- × -× × ×Packing tower diameter
-Model
Stainless steel mesh corrugated packing
Year number
-Standard number
For example, the tower diameter is DN600mm, and I-type stainless steel mesh corrugated packing is used, and its mark is: HG/T 21559.195-NC-I—600
3.2 Specifications and characteristics
3.2.1 Stainless steel mesh plate corrugated packing is a regular packing composed of several special stainless steel mesh plate corrugated sheets, arranged vertically into a disc shape according to certain diameter requirements. Its structural dimensions are shown in Figure 3.2.1 and Table 3.2.1. 143
(Family transfer
Figure 3, 2, 1 Stainless steel mesh corrugated packing
In the figure, the unit of size is mm and the unit of angle is degree. D—-packing plate diameter, H—packing plate height; h—upper or middle width, h,—-lower straight edge width A—lower cover flange width;—plate corrugation inclination angle β—plate corrugation tooth angle Device—plate thickness; h—plate corrugation peak height 2B—plate corrugation distance. 144
Table 3, 2. 1
Stainless steel mesh corrugated packing structure size and characteristics
Inclination angle 6
Tooth angle β
Specific surface area
Porosity
Plate thickness 8
Bulk density,
Note: @Stainless steel density is 7850kg/m2
②The curvature radius of the tooth angle is less than 2mm.
45±1:
6. 5±0. 1
12. 0±0. 1
3.2.2 The main difference between stainless steel mesh plate corrugated packing 1 and ug is the different specific surface area, which can be selected according to the process design needs.
3.2.3 The plate height of stainless steel mesh plate corrugated packing is 40~200mm. The relationship between plate height and tower diameter is shown in Table 3.2.3. The plate height can be selected according to different tower diameters. 3 Relationship between packing plate height and tower diameterTower diameter DN
Plate quotient H
100～400
40~100
500~1000
100~150
150~200
4 Materials
4.0.1 The material of stainless steel packing shall comply with the provisions of GB4239 & Stainless steel and heat-resistant steel cold-rolled steel strip. 4.0.2 The selected materials must have a quality inspection certificate, a quality guarantee and a material chemical composition report.
5 Manufacturing requirements
5.0.1 According to the peak height, wave pitch and inclination in Table 3.2.1, the raw stainless steel strip shall be stamped (or rolled) into a mesh plate corrugated strip. The height of the corrugated strip shall be equal to the plate height. See Table 3.2.1 for processing requirements. Then cut into mesh plate corrugated strips according to different chord lengths on the cross section of the packing plate. 5.0.2 The packing plate is composed of several mesh plate corrugated sheets arranged vertically into a disc, and the inclination direction of the adjacent mesh plate corrugated sheets is opposite (see Figure 3.2.1). When the inclination angle is 30°, the adjacent mesh plate corrugated sheets are inclination at 60° and cross each other. When the inclination angle is 45°, the adjacent mesh plate corrugated sheets are inclination at 90°. 5.0.3 According to the tower equipment design, the packing plate is determined to be block type or whole plate type. The block type is used for the packing plate. The purpose is to facilitate the installation of the packing. The size of each block should be able to enter the tower from the manhole for assembly. For towers with a tower diameter of less than 800mm, it should be manufactured as a whole plate.
5.0.4 The whole plate of packing should be tightened with steel belts, and the ends of the hoop should be overlapped and spot welded. Prevent the packing from deforming. After the upper hoop is installed, cut the seam on the upper edge to be used for on-site flanging before the packing is installed in the tower, see Figure 5.0.4. The spacing between the cut seams depends on the size of the plate diameter, so as to facilitate flanging. 5.0.5 For block-type packing, the plates of each packing must be spot welded to ensure that each packing is integrated and the corrugated plates do not fall apart. No steel belt hoop is added to each block and assembled packing plate. 5.0.6 The material of the hoop is stainless steel plate with the same thickness as the corrugated plate of the orifice plate. The width, number of roots and flange are shown in Figure 5.0.4 and Table 5.0.6-1~2. 147
Figure 5.0.4 Width and cloth of hoop
The dimensions in the figure are in mmH--packing plate quotient, A--lower hoop flange width; h1-h. Lower hoop straight side width.
Table 5.0.6-1 Width and number of uneven discs Disc height H
Number of hoops
Upper hoop h,
Middle hoop h
One upper hoop or middle hoop width,
Lower hoop ha+>
Change 5. 0. 6 - 2 Disc diameter and flange size to disc diameter D
300800
Flange A
5.0.7 The whole disc packing or the packing assembled into a disc requires that the corrugated sheets are arranged evenly, and the peak heights of two adjacent sheets of packing should be opposite to form a regular shaped channel (see Figure 3.2.1). The disc surface is flat, and the requirements for disc diameter, disc roundness, disc height deviation, disc surface horizontality and verticality are shown in Table 5.0.7. Table 5.0.7 Packing plate processing size accuracy requirements Tower diameter DN
400~1000
1100~3000
Plate diameter Dbzxz.net
Plate diameter deviation 4S
2. 0~8. 0
Plate height deviation
Horizontal degree
Vertical degree
Inspection and acceptance
6.1 Acceptance rules
6.1.1 Packing should be accepted in batches. Packing of one specification can be batched according to the provisions of Table 6.1.1. When the production volume of packing of one size is less than the batch value specified in Table 6.1.1, the production volume of one size can be regarded as one batch. Table 61.1 Filling in batches
Diameter of disk D (mm)
Each batch (m)
6.1.2 The sampling quantity of each batch of fillers can be 10% of the total number of disks of the batch of fillers, but the minimum shall not be less than two disks. If the sampled products do not meet the inspection requirements of this standard, the sampling quantity shall be doubled and re-inspected. The results of the repeated 6. 1.33
inspection are applicable to the same batch of products. If the re-inspected samples are still unqualified, the batch of products shall be unqualified,
6.1.4 Carry out type inspection and prepare inspection reports under the following circumstances. 1 Once a year during normal production,
2 When there are major changes in materials and processes
3 When production is resumed after being suspended for more than one year. 6.1.5 The type inspection content includes all the items required by this standard. Samples can be taken from two plates of products that have passed the factory inspection. If the inspection fails, double sampling is allowed. If the re-inspection still fails, the product is judged as unqualified.
6.2 Inspection method
6.2.1 Each batch of fillers shall be inspected by the quality inspection department according to the requirements of this standard before leaving the factory. 150
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