This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine flange cast iron stop check valves (hereinafter referred to as stop check valves) with flange connection dimensions in accordance with GB569 and GB2501. This standard is applicable to marine piping systems with media such as seawater, fresh water, lubricating oil, fuel oil and steam with a temperature not exceeding 220°C. GB/T 591-1993 Marine flange cast iron stop check valve GB/T591-1993 standard download decompression password: www.bzxz.net

D 621.646.24 : 621.643. 212
National Standard of the People's Republic of China
GB/T 591—93
Marine cast iron flanged stop check valves1993-10-16 Issued
1994-07-01 Implementation
National Technical Supervision Bureau Issued
National Standard of the People's Republic of China
Marine cast iron flanged stop check valves1Production content and scope of application
GB/T 591—93
Generation G591-8+
This standard specifies the flange connection size according to GB569, GB250T marine cast iron stop flange (hereinafter referred to as stop flange) product classification, technical requirements, test square teeth, inspection rules, marking and packaging. This standard is applicable to toxic water, fresh water, lubricating oil, fuel oil and hot steam with a temperature not exceeding 220°C. 2 Reference standards
G=69 General monthly delivery and connection dimensions and sealing surface GB absorption some original reading parts use technology multiple times
G2501 flange connection dimensions and your cover four busy ) Ship pipeline parts memory
QB3C32
GB1169S Marine flange is made according to the structural length of the golden screen net door 20/T1J2001 Intelligent pin making wall parts
3 Product classification
3.1 The stop valve type is specified in the following regulations: Type B---Flange connection size is in accordance with the direct load stop valve standard GB669: Type AS--Flange connection size is in accordance with the direct load stop valve standard GB2501, Type BS
Flange connection size is in accordance with the direct type micro stop valve standard GB2501. 3.2 The specifications of the standard for the cutting room shall be as per Table 1.
Nominal pressure PN
Normal diameter DN
65~15:
G: -~350
3.3 The sizes of A and B type cutting machines with diameter DN of 20~150mm shall be as per Figures 1, 2 and 3. Home Technical Supervision and Advisory Bureau 1993-10-16 approved 1994-07-01 implementation
AAS (DN20--150)
Nominal public capital
1251463
Outline dimensions
GL/T 591-93
123104
Figure 2 Type BS Type (D20--50)
18.4 :i6.2
GB/T 59193
3.4 ​​45 type BS check valve with diameter DM of 2~31mm uses 1-Figure 4 and Table 3 for total international
outward diameter:
outward dimension
Ass type
85h375
x:15e0
750,733
1201:15
:50536
3.5 marking example
s0hzra
CB/T 591--93
255232
125·122
166133
24.6: 23-..bzxZ.net
34. ?132.5
79, 4 : 73. 5
The nominal stop force is: .5MPa, the nominal diameter is 5nmm. According to the flange connection size of GE9 and the required cover of the marine Darrant titanium straight-through super-mountain check valve,
Huangzhiguo valve
416C50C8/T551--93
GH/T591-93
The nominal pressure is 1.0MPa, the public registration is 150mm. The flange connection size and sealing surface (chuan advance) of B2501 are used for marine flange angle cutting check valve:
Stop check valve H51F150G/51-93
4 Technical requirements
4.1 The installation requirements of the stop limit are 60.
42. The materials for the replacement of the previous check valve must be in accordance with 4. Table 1
Part name
Network rest, blue
Easy to write steel
4.3 The dimensions of the check flange shall be in accordance with GB565.GH2501.44A5, the length of the check flange shall be in accordance with GB1169B
4.5 The thickness of the check flange shall be in accordance with ZB/TUs2Gril. Test methods and inspection rules
Test standard for the width of the check flange shall be in accordance with G0
Test standard shall be in accordance with the inspection standard of the island 5,
Determination of the performance of the check flange
Appearance inspection
Strong water pressure test
Width water pressure test
5.3 Each check flange shall be inspected item by item in Table 6 before it can be used in the factory. Marking and packaging
6.1 The marking on the base shall be in accordance with GB3032.62 The marking shall be in accordance with GB600,
2QSn1c-2
2QA1-2
Marking number
C883-83
GE4I-84
CB683-83
Specially in accordance with 9130
GPE is currently transported
Additional instructions:
This standard is in accordance with the provisions of the new industry company. B591-93
This standard is under the jurisdiction of the ship pipe system accessories sub-technical committee: This standard is drafted by Dalian General Ship Design and Research Institute. U3 Institute, back island network door reference. The main drafter of this standard is Weng Chugong: This standard was established in 1965 as standard 591-6. From the date of implementation of this standard, the original foreign capital will promote CBM928 cast iron stop valve and M-8 PN16 flange cast iron stop valve. This standard is provided in the unified standard sample,
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