This standard specifies the classification, basic dimensions, requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of iron and copper gate valves, stop valves, ball valves, and check valves with internal thread connections for plumbing. This standard applies to iron and copper gate valves, stop valves, ball valves, and check valves with internal thread connections for plumbing with a nominal pressure PN not greater than 1.6MPa, a nominal diameter DN not greater than 100mm, and an operating temperature t not greater than 200℃. GB/T 8464-1998 Valve with internal thread connection for plumbing GB/T8464-1998 Standard download decompression password: www.bzxz.net

GB/T8464-1998
This standard is a revision of GB8464-87 "General Technical Conditions for Internally Threaded Gate Valves, Stop Valves, Ball Valves, and Check Valves" and GB8465.1~8465.8-87 "Basic Dimensions of Internally Threaded Gate Valves, Stop Valves, Ball Valves, and Check Valves". This standard has some changes from GB8464 and GB8465.1~8465.8 in the following major technical contents: 1. This standard adds the basic dimensions of some valve types of copper internally threaded valves; 2. This standard adds the technical contents of iron and copper internally threaded valves; 3. This standard re-compiles the inspection rules for internally threaded valves. This standard replaces GB8464-87 and GB8465.1~8465.8-87 from the date of implementation. This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Valve Standardization. The drafting organizations of this standard are: Hefei General Machinery Research Institute of the Ministry of Machinery Industry, Ningbo Ameco Copper Valve Co., Ltd., and Wafangdian Zhonghaimao Copper Valve Co., Ltd.
The main drafters of this standard are: Liu Yang, Li Yan, Li Shuzhun, Zheng Jinming, Rong Weihua, and Kong Liangliang. 200
1 Scope
National Standard of the People's Republic of China
Valves with female screw ends for water-heating system
Valves with female screw ends for water-heating systemGB/T 8464—1998
Replaces GB8464—87
GB 8465.1~8465.8:-87
This standard specifies the classification, basic dimensions, requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of iron and copper gate valves, stop valves, ball valves, and check valves with female screw ends for water-heating. This standard applies to iron and copper gate valves, stop valves, ball valves, and check valves (hereinafter referred to as internal thread connection valves) with nominal pressure PN not greater than 1.6MPa, nominal diameter DN not greater than 100mm, and working temperature t not higher than 200℃ for water heating. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T10471995 Nominal diameter of pipeline components GB1048—90 Nominal pressure of pipeline components
GB/T1184—1996 Tolerances of shape and position without tolerance value GB 2828--87
GB 2829--87
GB 3287 ---82
GB 4380—84
GB5938-86
GB 5944—86
GB 7306-—87
GB 7307---87
GB 12220—89
GB 12225--89
Batch inspection counting sampling procedure and sampling table (applicable to the inspection of continuous batches) Periodic inspection counting sampling procedure and sampling table (applicable to the inspection of the stability of the production process) Technical conditions for malleable cast iron pipe fittings
Methods for determining roundness error Two-point and three-point methods Corrosion resistance test methods for metal coatings and chemical treatment layers of light industrial products Neutral salt spray test (NSS) method Evaluation of corrosion resistance test results of metal coatings on light industrial products Pipe threads with threaded seals
Pipe threads without threaded seals
General valve marking
General valve
GB 12226-89
General valve
GB/T 13927-92
GB/T 15117-94
JB 308---75
JB/T 5300--91
JB/T 7928--95
3 Classification
3.1 Structural type
Technical conditions for copper alloy castings
Technical conditions for grey iron castings
Pressure test for general valves
Copper alloy die castings
Model compilation method
General valves
General valves
Supply requirements
3.1.1 The structural type of the internally threaded gate valve is shown in Figure 1. Approved by the State Administration of Quality and Technical Supervision on August 10, 1998, and implemented on July 1, 1999
GB/T8464—1998
1-valve body; 2-plate; 3-gasket; 4-valve cover; 5-tightening diagram; 6-packing; 7-pressure enclosure; 8-tightening nut; 9-valve stem; 10-handwheel; 11-nameplate; 12-nutFigure 1
3.1.2The structural type of the internal thread connection stop valve is shown in Figure 2. 12
1-valve body; 2-nut; 3-valve disc; 4-disc, 5-disc stem; 6-valve benefit; 7-packing, 8-packing gland, 9-valve stem, 10-nameplate + 11-nut: 12-handwheelFigure 2
3.1.3The structural type of the internal thread connection ball valve is shown in Figure 3. 202
GB/T 8464
1 valve body, 2—gasket, 3—valve cover; 4—ball; 5—valve seat; 6—valve stem; 7—packing pad; 8—packing; 9—packing gland; 10—pressure nut 11—handle 12—gasket; 13-nut Figure 3
3.1.4 The structural type of the internal thread connection check valve is shown in Figure 4. 1-valve body; 2-valve disc: 3-nut; 4-rocker; 5-pin nut; 6-pin; 7-pad; 8-valve covera) Swing type
3.2 Model
GB/T8464-1998
-valve body, 2-valve seat; 3-valve group; 4-wide coverb) Lift type
1-valve cover; 2-pressure diagram; 3-valve disc; 4-valve identification frame, 5-spring; 6-valve bodyc) Lift vertical type
Figure 4 (end)
The model compilation of internal thread connection valves shall comply with the provisions of JB308. 3.3 Parameters
3.3.1 The nominal diameter of internal thread connection valves shall comply with the provisions of GB/T1047. 3.3.2 The nominal pressure of internal thread connection valves shall comply with the provisions of GB1048. 4 Basic dimensions
4.1 Internally threaded gate valve
4. 1. 1 The basic dimensions of PN1MPa iron gate valves are shown in Figure 5 and Table 1. 4.1.2 The basic dimensions of PN1MPa copper gate valves are shown in Figure 5 and Table 2. 4.1.3 The basic dimensions of PN1.6MPa copper gate valves are shown in Figure 5 and Table 3. 204
l Effective
Not less than
Note: H, S, D. are reference dimensions.
GB/T 8464 - 1998
Table 1PN1MPa Basic dimensions of iron gate valves
lEffective
Not less than
GB/T 8464—1998
PNIMPa Basic dimensions of copper gate valves
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. H, D, S are reference dimensions.
3L1, Hi, D. are applicable to cast copper gate valves; L2, H2, Da2 are applicable to die-cast copper gate valves. H
Table 3PN1.6MPa Basic dimensions of copper gate valves
Not less than
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. 1
2 H, D., S are reference dimensions.
4.2Internal thread connection stop valve
4.2.1The basic dimensions of PN1.6MPa iron stop valve are shown in Figure 6 and Table 4. 4.2.2The basic dimensions of PN1MPa copper stop valve are shown in Figure 6 and Table 5. 4.2.3The basic dimensions of PN1.6MPa copper stop valve are shown in Figure 6 and Table 6. 206
1Effective
Not less than
Note: H, S, D. are reference dimensions. wwW.bzxz.Net
Not less than
GB/T 8464 --- 1998
Table 4Basic dimensions L of PN1.6MPa iron stop valve
Table 5Basic dimensions of PN1MPa copper stop valve
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. 2H, D, S are reference dimensions.
3Li, HI are suitable for cast copper stop valves, L2, H, are suitable for die-cast copper stop valves. H
Not less than
GB/T 8464 1998
Table 6PN1.6MPa copper stop valve basic size L
If the user needs, the L value can be adjusted appropriately.But it must be indicated in the order contract. 1
2D, H, S are reference dimensions.
4.3 Internally threaded ball valve
4.3.1 The basic dimensions of PN1.6MPa iron ball valve are shown in Figure 7 and Table 7. 4.3.2 The basic dimensions of PN1MPa copper ball valve are shown in Figure 7 and Table 8. 4.3.3 The basic dimensions of PN1.6MPa copper ball valve are shown in Figure 7 and Table 9. f
L Soil Science
Table 7 Basic dimensions of PN1.6MPa iron ball valve
(effective
not less than
Note: HS, 1. are reference dimensions.
1 Effective
not less than
GB/T8464-1998
Table 8PN1MPa Basic dimensions of copper ball valves
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. 1
2H, S, L. are reference dimensions.
PN1.6MPa Basic dimensions of copper ball valves
Not less than
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. 1
2H, S, L. are reference dimensions.
4.4 Internal thread connection check valve
4.4.1 The basic dimensions of PN1.6MPa iron check valves are shown in Figures 8, 9 and Table 10. 4.4.2 The basic dimensions of PN1MPa copper check valves are shown in Figures 8, 9 and Table 11, 4 .4.3 The basic dimensions of PN1.6MPa copper check valves are shown in Figures 8, 9, 10 and Table 12. 旺
La士8
lValid
Not less than
Note: He, Ha, S are reference dimensions.
Not less than
GB/T8464—
Table 10 PN1.6MPa iron check valve basic dimensions L
Table 11 PN1MPa copper check valve basic dimensions L
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. 2H., Ha, S are reference dimensions.
1Valid
Not less than
GB/T 8464 --- 1998
Table 12 Basic dimensions of PN1.6MPa copper check valves L
If the user needs, the L value can be adjusted appropriately, but it must be indicated in the order contract. 1
2H. , Ha, S, are reference dimensions.
5.1 Shell and sealing performance
After the pressure test of iron and copper valves, the results shall comply with the relevant requirements of the shell and sealing test regulations in GB/T13927. The maximum allowable leakage of the check valve with metal sealing pair shall comply with the requirements of Table 13. Table 13 Maximum allowable leakage of check valves
Nominal diameter DN
5.2The maximum allowable working pressure of the valve shall comply with the provisions of Table 14. Table 14 Maximum allowable working pressure of valves
Maximum allowable discharge volume
cm°/min
Temperature rating
Nominal pressure
5.3 Pipe thread
≤120
>120～150
Maximum allowable working pressure
5.3.1 The thread size and accuracy of the two ends of the internal thread connection valve shall comply with the provisions of GB7307 and GB7306. >150～200
5.3.2 The surface roughness R of the pipe thread shall not exceed 6.3μm, and the surface quality shall comply with the provisions of Article 1.1 of GB3287-82. 5.3.3 The angular deviation of the axis of the pipe thread at both ends shall not exceed 1°. 5.4 Parts
5.4.1 The sealing surface of the internal threaded valve should not have cracks, pores and other defects. The roughness R of the sealing surface of the ball valve and check valve should not be greater than 0.8um, and the roughness R of the sealing surface of the gate valve and stop valve should not be greater than 1.6um. 5.4.2 The surface of the steel ball and valve stem should be treated with rust prevention. After 24h continuous spray test, it should reach the assessed corrosion resistance level, 7 level 211
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