This standard specifies the series, size, technical conditions, inspection, paint, packaging and marking of vibration dampers. This standard is applicable to absorbing or eliminating vibrations caused by air flow pulsation or impact in DN50~DN600 pipelines. HG/T 21578-1994 Pipeline vibration damper HG/T21578-1994 Standard download decompression password: www.bzxz.net

Pipeline Vibration Dampers
23 Maibu
.:1995:.05.. 0
Ministry of Chemical Industry of the People's Republic of China
Ministry of Chemical Industry Document
Huajianfa (1995) No. 50
Notice on Issuing the Chemical Industry Standard "Pipeline Vibration Dampers"
To all provincial, autonomous region, municipality directly under the Central Government, and independently planned cities, and all relevant design units:
The "Pipeline Vibration Dampers" formulated by the Process Piping Design Technology Center of the Ministry of Chemical Industry and the Shanghai Chemical Engineering Design Institute has been reviewed and approved as a recommended chemical industry standard, numbered HG/T21578-94. It will be implemented from May 1, 1995. The Process Piping Design Technology Center of the Ministry of Chemical Industry is responsible for the management of this standard, and the Engineering Construction Standard Editing Center of the Ministry of Chemical Industry is responsible for publishing and issuing it. Ministry of Chemical Industry
January 23, 1995
Industry Standard of the People's Republic of China
Pipeline Vibration Damper
HG/T 21578-94
Editor: Shanghai Chemical Engineering Design Institute
Approving department: Ministry of Chemical Industry
Effective date: May 1, 1995 Engineering Construction Standard Editing Center of Ministry of Chemical Industry
Subject content and scope of application,
Referenced standards·
List of itemswwW.bzxz.Net
Structural type, model indication method, dimension series table and stroke load series table technical conditions
Paint, packaging and marking·
Appendix A Selection and installation
Preparation instructions
(3)
Subject content and scope of application
1.0.1 This standard is applicable to absorbing or eliminating vibration caused by air flow pulsation or impact in DN50~DN600 pipelines.
1.0.2 This standard specifies the series size, technical condition inspection, paint, packaging and marking of vibration absorbers.
The maximum working stroke of the pipeline vibration damper is 48, 75mm. I.0..3
1.0.4Working load
Initial working load: 2307982N
Maximum working load: 921-31930N.
Ambient temperature: -20200℃.
GB1239
GB1804
GB 191
Reference standards
《Basic types and dimensions of manual arc welding joints》
《Tolerances and fits, limit deviations of dimensions without tolerances》
Packaging, storage and transportation instructions
Structural type, model representation method, dimension series table 3
and stroke load series table
3.1 Structural type
3.1.1 Initial working load The fixed pipe shock absorber is mainly composed of spring, cylinder, lifting ring, tie rod, basket nut, nameplate, etc. The structure is shown in Figure 3.1.1.
Basket nut
Figure 3.1.1 Fixed initial working load type pipeline vibration damper (MS-G type) 3.1.2 Adjustable initial working load type pipeline vibration damper mainly consists of spring, cylinder, lifting ring (adjustable), tie rod, basket nut, nameplate, etc. The structure is shown in Figure 3.1.2.
Basket nut
Figure 3.1.2 Adjustable initial working load type pipeline vibration damper (MS-K type) Model representation method
The pipeline vibration damper model consists of the following partsMS
Pipeline vibration damper number (16)
Tie is round steel
Code 1
Code 2
Tie rod is steel pipe
Fixed initial working load type
Adjustable initial working load type
Pipeline vibration damper code||tt ||Code is G
Code is K
Example 1: MSG2-3
indicates the No. 3 pipe vibration absorber with fixed initial working load and tie rod as steel pipe. Example 2: MSK1-4
indicates the No. 4 pipe vibration absorber with adjustable initial working load and tie rod as round steel. 3.3
Outline dimensions and connection dimensions of pipe vibration absorber Outline dimensions and connection dimensions of pipe vibration absorber See Table 3.3 for the regulations. 5
0000090200
Pipeline vibration damper travel load
Pipeline vibration damper travel load series see Table 3.4 for the regulations. Pipeline vibration damper travel load series table
Degree, N/mm
Vibration damper number
136861
1464020345
9.208 25.568 94. 85
266.19369.9
Stiffness, N/mm
4.1.1 The material shall comply with the requirements of the drawing, and the material shall comply with the national standard or the standard of the Ministry of Metallurgy, and have a quality guarantee.
4.1.2 The spring material is 60Si2Mn, and the hardness after heat treatment is HRC45~50. 4.2 Manufacturing
4.2.1 The limit deviation of the unspecified tolerance size shall be processed in accordance with the provisions of GB1804 "Tolerances and Fits Limit Deviations of Unspecified Tolerance Sizes". 4.2.2 The overall welding and assembly welding parts of the pipeline vibration damper shall be welded. The joint structure shall comply with the relevant provisions in GB985 "Basic Types and Dimensions of Manual Arc Welding Joints", and the welding rod shall be 422.
Before welding, the slag, rust, oil stains and 4.2.3
debris that affect the welding quality in the weld area shall be removed.
The weld shall have good penetration and surface quality. The height of the fillet weld shall not be less than the minimum thickness dimension of the welded parts. The thread surface and rotating parts shall be coated with butter, and the thread shall be protected. The spring manufacturing shall comply with the relevant provisions in GB1239 "Ordinary Cylindrical Helical Spring". The load category of the spring design shall be classified as second.
The load accuracy of the spring shall be second.
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