This standard specifies the technical requirements, test methods, inspection rules, etc. for welded seal rings for mechanical seals. This standard applies to welded seal rings for mechanical seals. JB/T 6372-1992 Technical requirements for welded seal rings for mechanical seals JB/T6372-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 6372-1992
Overlay Welding Rings for Mechanical Seals
Technical Conditions
Published on July 15, 1992
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on January 1, 1993
Mechanical Industry Standard of the People's Republic of China
Overlay Welding Rings for Mechanical Seals
Technical Conditions
Subject Content and Scope of Application
JB/T6372-1992
This standard specifies the technical requirements, inspection methods, inspection rules, etc. for overlay welding rings for mechanical seals. This standard applies to overlay welding rings for mechanical seals. Cited standards
GB1184
GB1220
GB1958
GB2654
GB2828
GB3177
3 Technical requirements
Overlay welding rods
Shape and position tolerances
Provisions for unmarked tolerances
Stainless steel bars
Shape and position tolerances
Testing regulations|| tt||Welded joints and cladding metal hardness test methodBatch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection)Smooth workpiece size inspection
The base material of the cladding sealing ring is austenitic or martensitic stainless steel. The commonly used main grades are 1Cr18Ni9, 1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 0Cr13 and 1Cr13. Its chemical composition and mechanical properties should comply with the provisions of GB1220. 3.2 The cladding layer material of the cladding sealing ring is made of drill-based, nickel-based, chromium-based gas welding wire and electric welding rod. Its chemical composition should comply with the provisions of GB984 and relevant standards. bZxz.net
3.3 The thickness of the cladding layer of the cladding sealing ring shall not be less than 2mm. 3.4 The hardness of the cladding layer of the cladding sealing ring shall not be less than 42HRC. 3.5 Requirements for the sealing end face of the cladding sealing ring
3.5.1 The flatness tolerance is 0.0009mm, and the surface roughness parameter R. value is 0.2um3.5.2 The maximum diameter of the surface pores is not greater than 0.3mm, the distance between two adjacent holes is not less than 5mm, and the ratio of the total area of ​​the sealing surface pores to the sealing surface area is not greater than 0.3%.
3.5.3 The surface is not allowed to have scratches, cracks, slag inclusions, looseness, peeling and other defects that affect the performance. 3.6 The parallelism of the end face of the cladding sealing ring and the end face of the auxiliary sealing ring shall be in accordance with the 7th grade tolerance of GB1184. 3.7 The verticality of the outer circle or inner hole of the cladding sealing ring and the auxiliary sealing ring shall be in accordance with the 7th grade tolerance of GB1184. 3.8 The surface roughness parameter R. value of the part where the cladding sealing ring contacts the auxiliary sealing ring is 3.2um, and the outer circle or inner hole size tolerance zone is h8 or H8.
Approved by the Ministry of Machinery and Electronics Industry on July 15, 1992 and implemented on January 1, 1993
Inspection method
JB/T6372-1992
4.1 The hardness inspection of the sealing end face of the cladding sealing ring shall be carried out after mechanical cutting or rough grinding, and the test method shall comply with the provisions of GB2654.
4.2 The defects of the sealing end face of the cladding sealing ring shall be inspected by visual inspection. 4.3 The flatness of the sealing end face of the cladding sealing ring shall be inspected by the Class I plane flat crystal monochromatic light source interference method or other optical instruments. 4.4 The dimensional tolerance and form and position tolerance of the cladding sealing ring shall be inspected in accordance with the provisions of GB3177 and GB1958 respectively. 5
Inspection rules
5.1 Hardness inspection of weld overlay shall be conducted in accordance with the normal inspection one-time sampling plan, general inspection level 1, and qualified quality level (AQL) 4.0 specified in GB2828.
5.2 The dimension tolerance, shape and position tolerance and surface defects of weld overlay sealing ring shall be fully inspected. Packaging, marking, storage
The product shall have the manufacturer's mark.
6.2 The product packaging box shall indicate the product model, specification, manufacturer name and factory date. 6.3
The product shall be accompanied by the product certificate, registered trademark, manufacturer name, signature and date of the inspector when leaving the factory. The packaging shall be able to prevent damage and loss of parts during transportation and storage. 6.4
The packaging box shall be marked with "handle with care" and "moisture-proof" and other signs. 6.5
Additional Notes:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Zijia Mechanical Seals Factory. The main drafter of this standard was Wang Min.
People's Republic of China
Mechanical Industry Standard
Welding Sealing Ring for Mechanical Seal
Technical Conditions
JB/T 63721992
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×12301/16
Sheet 1/4Number of words 8.000
First printing in January 1993
First edition in January 1993
Print run 1-500
Price 3.00 Yuan
Mechanical Industry Standard Service Network: http=//www.JB.ac.cn69
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