Foreword
This document is drafted in accordance with the provisions of GB/T 1.12020 "Guidelines for Standardization Part 1: Structure of standardized documents and drafting rules.
This document replaces GB/T 8464-2008 "iron and copper threaded connection valves" compared with GB/T 8464-2008, in addition to editorial changes, the main technical changes are as follows.
a) The addition of stainless steel valves (see Chapter 1, Chapter 1 of the 2008 edition).
b) increased the "wrench" terminology and definitions (see 3.1).
c deleted the parameter requirements (see 32) c) of the 2008 edition
d) Changed the minimum wall thickness requirement for the valve body (see 6.5, 4.2.7)d of the 2008 edition)
e) Changed bonnet requirements (see 6.6, 4.3 of the 2008 edition)
f) Changed gate requirements (see 6.8, 4.4 of the 2008 edition)
g changed stem requirements (see 6.11, 4.7 of the 2008 edition); g
h Removed the ball passage diameter requirement and changed the ball surface corrosion resistance requirement (see 6.12,2, 4.8.24.8.3 of the 2008 edition).
i changed the sealing performance requirements (see 6.17, 4.14 of the 2008 edition).
jChanged metal contaminant precipitation requirements (see 6.18, 4.15 of the 2008 edition)0
k change the ball valve ball surface corrosion resistance test method (see 7.10.2, 2008 edition of 5.8); k)
l changed the inspection rules (see Chapter 8, Chapter 6 of the 2008 edition)
m) Changes in marking, packaging, transport and storage (see Chapter 9, Chapter 7 of the 2008 edition) Please note that some of the contents of this document may relate to patents. The issuing body of this document does not assume responsibility for identifying patents This document is presented by the China Machinery Industry Federation.
This document is attributed to the National Technical Committee for the Standardization of Valves (SAC/TC188).
1 Scope
This document specifies the iron, copper and stainless steel threaded connection of the gate valve, globe valve, ball valve, on the return valve structure type, materials, technical requirements, test methods, inspection rules, and signs, packaging, transportation and storage.
This document applies to.
Nominal pressure is not greater than PN16, nominal size is not greater than DN100 gray cast iron valves.
Nominal pressure of not more than PN25 nominal size of not more than DN100 malleable iron valves and ductile iron valves.
Nominal pressure not greater than PN40 nominal size not greater than DN100 copper alloy valves and stainless steel valves
Operating temperature is not higher than 180 "C, working medium for water, non-corrosive liquids, air, saturated steam, etc.
Note 1: This document refers to the valve threaded connection gate valve, globe valve, ball valve or check valve.
Note 2: Nominal size greater than or equal to DN50 valve working medium does not include air saturated steam
2 normative reference documents
The following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the referenced documents, only the date of the corresponding version applies to this document; do not note the date of the referenced documents, the latest version (including all the change orders) applies to this document.
GB/T 700 carbon structural steel
GB/T 1176 casting copper and copper alloy
GB/T 1184-1996 shape and position tolerances without tolerance values
GB/T 1220 stainless steel bar
GB/T 2828.1-2012 Counting sampling inspection procedures Part 1 by receiving quality limit (AQL) retrieval of batch-by-batch inspection sampling plan
GB/T 4380 roundness error assessment of two-point, three-point method
GB/T 5750.6 standard test method for domestic drinking water metal indicators
GB/T 6461-2002 metal and other inorganic coverings on the metal matrix after corrosion testing of specimens and test pieces rating
GB/T 7306 (all parts) 55 "sealed pipe thread
GB/T 12221 metal valve structure length
GB/T 12224 steel valves general requirements
GB/T 12225 general valve copper alloy castings technical conditions
GB/T 12226 general valve gray cast iron parts technical conditions
GB/T 12227 general valve ductile iron parts technical conditions
GB/T 15530.8 Copper alloy and composite flange technical conditions
GB/T 29528 Technical conditions for copper alloy forgings for valves
GB/T 35741 Industrial valves with stainless steel forgings technical conditions
QB/T 5257 polytetrafluoroethylene (PTFE) sheet
3 terms and definitions
The following terms and definitions apply to this document
Wrench wrench
Valve and pipe installation clamping, installation tools and valve pipe thread head contact parts
4 Structure type
Typical structure of threaded connection gate valve is shown in Figure 1
5 Material
5.1 iron, copper and stainless steel valve main parts materials recommended for selection see Table 1 ~ Table 3. In the conditions of ensuring product performance, other materials are allowed to replace.
Iron valve main parts material 1
5.2 gray cast iron parts should meet the technical requirements of GB/T12226, malleable iron parts should meet the technical requirements of GB/T 9440, ductile iron parts should meet the technical requirements of GB/T 12227, copper alloy castings should meet the technical requirements of GB/T 12225, copper alloy forgings should meet the technical requirements of GB/T 29528 The technical requirements of stainless steel castings should comply with the provisions of GB/T 12230, the technical requirements of stainless steel forgings should comply with the provisions of GB/T 35741.
6 Technical requirements
6.1 Pressure - temperature rating
6.1.1 pressure-temperature rating by the valve body and internal parts material smaller pressure-temperature rating to determine
6.1.2 Pressure-temperature rating of iron valves in accordance with the provisions of GB/T 17241.7.
6.1.3 copper alloy valve pressure - temperature rating in accordance with the provisions of GB/T 15530.8
6.1.4 stainless steel valves pressure-temperature rating in accordance with the provisions of GB/T 12224
6.2 Structure length
The structure of the valve length in accordance with the provisions of GB/T 12221, or in accordance with the requirements of the order contract
6.3 Connection end
6.3.1 The pipe threads at both ends of the valve should comply with GB/T 7306 (all parts) GB/T 7307, GB/T 12716
6.3.2 The surface roughness Ra of the pipe thread should be no greater than 6.3 The surface of the thread should be smooth and free from obvious defects such as broken teeth.
6.3.3 The deviation of the axis angle of the pipe thread at both ends shall be no more than 1.
6.4 Minimum flow diameter
The minimum diameter of the valve flow channel should be not less than the provisions of Table 4
7 test method
7.1 Structure length
With the corresponding accuracy of the gauge test
7.2 Connection end
7.2.1 Pipe thread accuracy
Detected with the corresponding precision pipe thread gauges
7.2.2 Surface roughness
Check with "surface roughness standard block" for comparison.
7.2.3 Deviation of pipe thread axis angle
Checked with a pipe thread mandrel
7.3 Minimum runner diameter
Detected with corresponding precision gauges.
7.4 Minimum wall thickness of valve body and cover
Valve body, valve cover wall thickness measured by thickness gauge or special calipers
8 inspection rules
8.1 Inspection classification
Product inspection is divided into factory inspection and type test
8.2 Factory inspection
8.2.1 Inspection items
Factory inspection items include 6.8.16.1316.15 to 6.17 listed in the project
8.2.2 Group lot and sampling principles
With the same category, the same species, the same type of product grouping, factory inspection of the samples required from the group lot extraction. Sampling according to the provisions of GB/T2828.1-2012, the use of special test level S3, the normal test a sampling program.
8.2.3 Judgment rules
Factory inspection items, receiving quality limit (AQL) in accordance with the provisions of Table 13
9 logo, packaging, transportation and storage
9.1 logo
The valve should be marked as follows.
a) manufacturer's name or trademark.
b) nominal size.
c) nominal pressure.
d) check valves need to mark the media allowed flow arrow.
e) signs should be obvious and clear, not easy to erase
Appendix A (normative) metal contaminant precipitation detection method
Foreword
1 Scope
2 normative reference documents
3 terms and definitions
4 Structure type
5 Material
6 Technical requirements
7 test method
8 inspection rules
9 logo, packaging, transportation and storage
Appendix A (normative) metal contaminant precipitation detection method
Foreword
This document is drafted in accordance with the provisions of GB/T 1.12020 "Guidelines for Standardization Part 1: Structure of standardized documents and drafting rules.
This document replaces GB/T 8464-2008 "iron and copper threaded connection valves" compared with GB/T 8464-2008, in addition to editorial changes, the main technical changes are as follows.
a) The addition of stainless steel valves (see Chapter 1, Chapter 1 of the 2008 edition).
b) increased the "wrench" terminology and definitions (see 3.1).
c deleted the parameter requirements (see 32) c) of the 2008 edition
d) Changed the minimum wall thickness requirement for the valve body (see 6.5, 4.2.7)d of the 2008 edition)
e) Changed bonnet requirements (see 6.6, 4.3 of the 2008 edition)
f) Changed gate requirements (see 6.8, 4.4 of the 2008 edition)
g changed stem requirements (see 6.11, 4.7 of the 2008 edition); g
h Removed the ball passage diameter requirement and changed the ball surface corrosion resistance requirement (see 6.12,2, 4.8.24.8.3 of the 2008 edition).
i changed the sealing performance requirements (see 6.17, 4.14 of the 2008 edition).
jChanged metal contaminant precipitation requirements (see 6.18, 4.15 of the 2008 edition)0
k change the ball valve ball surface corrosion resistance test method (see 7.10.2, 2008 edition of 5.8); k)
l changed the inspection rules (see Chapter 8, Chapter 6 of the 2008 edition)
m) Changes in marking, packaging, transport and storage (see Chapter 9, Chapter 7 of the 2008 edition) Please note that some of the contents of this document may relate to patents. The issuing body of this document does not assume responsibility for identifying patents This document is presented by the China Machinery Industry Federation.
This document is attributed to the National Technical Committee for the Standardization of Valves (SAC/TC188).
1 Scope
This document specifies the iron, copper and stainless steel threaded connection of the gate valve, globe valve, ball valve, on the return valve structure type, materials, technical requirements, test methods, inspection rules, and signs, packaging, transportation and storage.
This document applies to.
Nominal pressure is not greater than PN16, nominal size is not greater than DN100 gray cast iron valves.
Nominal pressure of not more than PN25 nominal size of not more than DN100 malleable iron valves and ductile iron valves.
Nominal pressure not greater than PN40 nominal size not greater than DN100 copper alloy valves and stainless steel valves
Operating temperature is not higher than 180 "C, working medium for water, non-corrosive liquids, air, saturated steam, etc.
Note 1: This document refers to the valve threaded connection gate valve, globe valve, ball valve or check valve.
Note 2: Nominal size greater than or equal to DN50 valve working medium does not include air saturated steam
2 normative reference documents
The following documents constitute the essential provisions of this document through the normative references in the text. Among them, note the date of the referenced documents, only the date of the corresponding version applies to this document; do not note the date of the referenced documents, the latest version (including all the change orders) applies to this document.
GB/T 700 carbon structural steel
GB/T 1176 casting copper and copper alloy
GB/T 1184-1996 shape and position tolerances without tolerance values
GB/T 1220 stainless steel bar
GB/T 2828.1-2012 Counting sampling inspection procedures Part 1 by receiving quality limit (AQL) retrieval of batch-by-batch inspection sampling plan
GB/T 4380 roundness error assessment of two-point, three-point method
GB/T 5750.6 standard test method for domestic drinking water metal indicators
GB/T 6461-2002 metal and other inorganic coverings on the metal matrix after corrosion testing of specimens and test pieces rating
GB/T 7306 (all parts) 55 "sealed pipe thread
GB/T 12221 metal valve structure length
GB/T 12224 steel valves general requirements
GB/T 12225 general valve copper alloy castings technical conditions
GB/T 12226 general valve gray cast iron parts technical conditions
GB/T 12227 general valve ductile iron parts technical conditions
GB/T 15530.8 Copper alloy and composite flange technical conditions
GB/T 29528 Technical conditions for copper alloy forgings for valves
GB/T 35741 Industrial valves with stainless steel forgings technical conditions
QB/T 5257 polytetrafluoroethylene (PTFE) sheet
3 terms and definitions
The following terms and definitions apply to this document
Wrench wrench
Valve and pipe installation clamping, installation tools and valve pipe thread head contact parts
4 Structure type
Typical structure of threaded connection gate valve is shown in Figure 1
5 Material
5.1 iron, copper and stainless steel valve main parts materials recommended for selection see Table 1 ~ Table 3. In the conditions of ensuring product performance, other materials are allowed to replace.
Iron valve main parts material 1
5.2 gray cast iron parts should meet the technical requirements of GB/T12226, malleable iron parts should meet the technical requirements of GB/T 9440, ductile iron parts should meet the technical requirements of GB/T 12227, copper alloy castings should meet the technical requirements of GB/T 12225, copper alloy forgings should meet the technical requirements of GB/T 29528 The technical requirements of stainless steel castings should comply with the provisions of GB/T 12230, the technical requirements of stainless steel forgings should comply with the provisions of GB/T 35741.
6 Technical requirements
6.1 Pressure - temperature rating
6.1.1 pressure-temperature rating by the valve body and internal parts material smaller pressure-temperature rating to determine
6.1.2 Pressure-temperature rating of iron valves in accordance with the provisions of GB/T 17241.7.
6.1.3 copper alloy valve pressure - temperature rating in accordance with the provisions of GB/T 15530.8
6.1.4 stainless steel valves pressure-temperature rating in accordance with the provisions of GB/T 12224
6.2 Structure length
The structure of the valve length in accordance with the provisions of GB/T 12221, or in accordance with the requirements of the order contract
6.3 Connection end
6.3.1 The pipe threads at both ends of the valve should comply with GB/T 7306 (all parts) GB/T 7307, GB/T 12716
6.3.2 The surface roughness Ra of the pipe thread should be no greater than 6.3 The surface of the thread should be smooth and free from obvious defects such as broken teeth.
6.3.3 The deviation of the axis angle of the pipe thread at both ends shall be no more than 1.
6.4 Minimum flow diameter
The minimum diameter of the valve flow channel should be not less than the provisions of Table 4
7 test method
7.1 Structure length
With the corresponding accuracy of the gauge test
7.2 Connection end
7.2.1 Pipe thread accuracy
Detected with the corresponding precision pipe thread gauges
7.2.2 Surface roughness
Check with "surface roughness standard block" for comparison.
7.2.3 Deviation of pipe thread axis angle
Checked with a pipe thread mandrel
7.3 Minimum runner diameter
Detected with corresponding precision gauges.
7.4 Minimum wall thickness of valve body and cover
Valve body, valve cover wall thickness measured by thickness gauge or special calipers
8 inspection rules
8.1 Inspection classification
Product inspection is divided into factory inspection and type test
8.2 Factory inspection
8.2.1 Inspection items
Factory inspection items include 6.8.16.1316.15 to 6.17 listed in the project
8.2.2 Group lot and sampling principles
With the same category, the same species, the same type of product grouping, factory inspection of the samples required from the group lot extraction. Sampling according to the provisions of GB/T2828.1-2012, the use of special test level S3, the normal test a sampling program.
8.2.3 Judgment rules
Factory inspection items, receiving quality limit (AQL) in accordance with the provisions of Table 13
9 logo, packaging, transportation and storage
9.1 logo
The valve should be marked as follows.
a) manufacturer's name or trademark.
b) nominal size.
c) nominal pressure.
d) check valves need to mark the media allowed flow arrow.
e) signs should be obvious and clear, not easy to erase
Appendix A (normative) metal contaminant precipitation detection method
Contents of GB/T 8464-2023
Foreword
1 Scope
2 normative reference documents
3 terms and definitions
4 Structure type
5 Material
6 Technical requirements
7 test method
8 inspection rules
9 logo, packaging, transportation and storage
Appendix A (normative) metal contaminant precipitation detection method
