HG/T 21556.1-1995 Carbon Steel Ball Ring Packing HG/T21556.1-1995 Standard download decompression password: www.bzxz.net

Carbon steel ball ring packing
HG/T 21556. 1--95
Subject content and scope of application
1.0.1 This standard specifies the structural dimensions, manufacturing, inspection, packaging, storage and transportation requirements of carbon steel ball rings with packing diameters of 16, 25, 38, 50 and 76 mm. 1.0.2 The applicable temperature range of carbon steel ball ring packing is less than or equal to 350℃. 63
GB1184
GB1804
Referenced standards
《High-quality carbon structural steel thin steel plate and strip》《Provisions for shape and position tolerances without tolerances》《Limit deviations of tolerances and fits without tolerances》《Dimensions, shape, weight and allowable deviations of cold-rolled steel plates and strips》3 Marking, specifications and characteristics
3.1 Marking
XXX.XX,X-PRCS-X,X
Nominal diameter
Carbon steel ball ring
Standard number
3.2 Specifications and characteristics
3.2.1 The ball ring is a cylinder with a surface with several windows of equal height and diameter. See Figure 3.2.1.
Figure 3.2.1 Carbon steel ball ring
In the figure: the unit of size is mm; D-diameter, H——height,. -Wall thickness. 3.2.2 Diameter series: The nominal diameters of the commonly used ball rings in industry are DN16, DN25, DN38, DN50 and DN76mm.
3.2.3 The specifications and dimensions of carbon steel ball ring packing are shown in Table 3.2.3. Table 3.2.3 Specifications and dimensions of carbon steel ball ring packing
0.4±0.05
0.6±0.06
0.8±0.07
1.0±0.09
1.5±0.12
Ovality deviation
Not more than
3.2.4 The geometric dimensions and performance parameters of carbon steel ball ring packing shall comply with the requirements of Table 3.2.4. Carbon steel ball ring packing characteristic parameters
Diameter×height×wall thickness
76X76×1.5
50×50×1.0
38X38X0.8
25×25×0.6
16×16X0.4
Stacking number
214000
Bulk density
(kg/m）
Specific surface area
(m\/m°）
Porosity
(m2/m2)
Dry packing factor
4 Materials
4.0.1 The selection of carbon steel materials should be in accordance with the technical conditions for cold-rolled steel plates in GB710 standard. 4.0.2 The size, shape, weight and allowable deviation of the selected cold-rolled steel sheets and strips shall be in accordance with the B-level accuracy in GB708 standard.
4.0.3 The selected materials must have a finished product certificate and a chemical composition report of the material. 67
Manufacturing requirements
5.0.1 The manufacturing dimensions of carbon steel ball rings are shown in Figure 5.0.1 and Table 5.0.1. E
Figure 5.0.1 Carbon steel ball ring packing manufacturing dimensions: the dimension unit is mm, A-
window hole spacing, B-window length; Hi-width, HH-upper and lower row window hole spacing, E, F
-length: a
L-expanded length; DbzxZ.net
diameter: H-
-window width;
-wall thickness; RR radius of curvature
Table 5.0.1 Carbon steel ball ring manufacturing dimension table
11.718.514.01
5.0.2 The stamping processing accuracy shall be in accordance with the IT13 grade in the GB1804 standard and the B grade in the GB1184 standard.
5.0.3 The gap between the joints of the packing rings should be less than 0.4mm for the three types of packings of DN16, DN25 and DN38mm; the gap between the joints of the two types of packings of DN50 and DN76mm should be less than 0.8mm. Misalignment of the upper and lower edges of the packing is not allowed. The end face of the packing ring should be perpendicular to the axial centerline and form a 90° angle with the side. 5.0.4 There should be no cracks or traces of rust on the surface of the packing ring, and there should be no burrs on the edge of the packing. 69
Inspection and acceptance
6.1 Acceptance rules
6.1.1 The packing should be accepted in batches, and packing of one size can be regarded as a batch. See Table 6.1.1 for batches. 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 a batch.
Table 6.1.1 Filling batches
Nominal diameter DN
Less than 38
Quantity (m\)
6.1.2 The sampling quantity of each batch of fillers shall not be less than 60 samples for testing. 6.1.3 If more than 5% of the sample size does not meet the requirements of this standard, the number of samples should be doubled from the same batch of products and retested. The results of the repeated tests are applicable to the same batch of products. If the unqualified rate of the retested samples is still greater than 5% of the sampling quantity, the batch of products is unqualified. 6.2 Inspection method
6.2.1 The diameter, wall thickness and height of the filler are measured with a vernier caliper. Each measurement item of each sample shall not be less than 2 measurement points. The measurement value requirements are shown in Table 3.2.3. 6.2.2 The roundness of the sample is measured with a vernier caliper. Two mutually perpendicular diameters must be measured for each specimen, and the ovality is determined by the radial difference between the two mutually perpendicular diameters. The measurement value requirements are shown in Table 3.2.3. Place the right angle meter on the end face of the packing, use a feeler gauge to measure the gap between the right angle meter and the edge of the end face, and use 6.2.3
to measure the tilt deviation of the side. The verticality deviation should be less than 1%. 6.2.4 When the shape and size of the packing change, it is necessary to conduct tests on the packing characteristics, fluid mechanics and mass transfer performance. 70
Marking, packaging and storage and transportation
7.1 Marking
7.1.1 The packing should be accompanied by a packing list and a product certificate. It should indicate: product name, specification and size, production date and inspection results, inspection date and seal of the inspector, and manufacturer's name. 7.1.2 The outer packaging box should indicate: product name, quality (or quantity), manufacturer name, and words or signs such as "Prevent moisture" and "Do not press heavily". 7.2 Packaging
The packaging container should be a dry box or other packaging material. The inner lining should be moisture-proof paper or other moisture-proof material. 7.2.11
7.2.2 The packaging container must have sufficient strength to withstand multiple handling and loading and unloading, and be safely and reliably transported to the destination.
7.3 Transportation and storage
7.3.1 The product should be transported in Take rain and moisture-proof measures 7.3.2 The product should be stored in a dry and non-corrosive place. Do not store it when the inner packaging is damaged.
Month Proposal unit, editor unit
Additional instructions
And main drafters
Chemical Engineering Design Technology Center Station, Ministry of Chemical Industry Proposal unit:
Editor unit: Chemical Engineering Design Technology Center Station, Ministry of Chemical Industry Editor in chief: Yu Hongshou Lin Jie
Reviewer: Xiao Chengji Tan Chong Fei Weiyang
Li Chunfang
Approval person, Wang Fuhua
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