This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine flange cast iron stop valves (hereinafter referred to as stop 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 590-1993 Marine flange cast iron stop valve GB/T590-1993 standard download decompression password: www.bzxz.net

rnc 629. 12. 01 : 621. 646- 2U52
National Standard of the People's Republic of China
GB/T 590—93
Marine flanged cast iron stop valve
Marine cast iron stop valve1993-05-24 issued
State Bureau of Technical Supervision
1994-01-01 implementation
National Standard of the People's Republic of China
Marine flanged cast iron stop valve
Main content and scope of application
GD/T 590-93
Agent GB5s0-84
This standard specifies the product classification, technical requirements, test methods, inspection rules, standard end and packaging of marine flanges (hereinafter referred to as flanges) according to GB550 and GB25(11). This standard applies to general pipeline systems with seawater, lubricating oil, fuel oil and steam with a condensation degree not exceeding 220. 2 Reference standards
GB559 New flange connection dimensions and sealing surface CB60 General technical specifications for ship pipelines B2501 Super flange connection dimensions and sealing surface CB3042
Marking of ship pipeline accessories bZxz.net
GB31598 Structural length of ship flange connection gold screen foot door ZBTU5201 Thickness of ship unfinished parts
3 Product classification
3.1 The types of stop valves are as follows:
A type - flange connection size according to GBE straight-through stop valve H type - standard connection size according to GH669 right-angle stop valve AS type - standard connection size according to G250 straight-through stop valve RS type
- flange connection size according to GR250 right-angle stop valve, 3.2 The main parameters of the stop valve are as shown in Table 1.
Japanese pressure JPN
|Nominal diameter DN
65--150
20-~-5k
50~309
3:3 Structural dimensions of type A and type B stop nets with diameter DN of 20150mn are derived from Figure 1. Figure 2 and Table 2. Approved by the State Bureau of Technical Supervision on May 24, 1993 and implemented on January 1, 1994
1A type, AS (EN215U)
Xue Ci only
GB,590
Figure R type BS type (n2t-15)
DN 20-300mm AS type, S type stop reading size refer to Figure 1 and Table 334
GH/T590-93
Figure 3A type (DN175~300)
Figure 4BS (DN) 75~9U0)
Outline size
A sss | tt||$66:27
A type FS type
42.5! 42 8
76.8176.3
11.D113.7
Nominal pressure 1.6M1u Nominal diameter 50mm, flange connection size and tightness according to GB69, generally use flange connection point lubrication
A165GB/590-3
Nominal pressure 1.0MP, nominal diameter 150mu According to flange connection size and tightness according to GB2501 (four-in-one flange solution with angle cut solution:
#BSI01CB/T5C93
Company technical requirements
4.1 Technical requirements according to GH500.4.2 The materials of the main parts prohibited from replacement are as follows: Table 4.4 The parts are not suitable for loading and unloading, and the flash salt is in accordance with the specific conditions. Aluminum code CB 590-93 ZQSn:0-2 2Q419-2 4.3 The connection dimensions of the stop valve shall be in accordance with GB56S and GB2561 respectively. 4.4 The ASBS stop valve system shall be in accordance with GH116S8. 4.5 The upper valve shall be in accordance with ZBTU52U01. 5 Test methods and inspection rules for the test of the whole process of GB600.
5.7 Type inspection and factory inspection Items shall be in accordance with Table 5
Determination of mechanical properties of parts
External inspection
Micro-variable water pressure test
Storage water pressure test
5.3、The check valve shall be inspected according to the items in Table>, and can be shipped after the inspection is completed. 6 Marking and packaging
6.1 The marking of the check valve shall be in accordance with GB3032.
The packaging of the check valve shall be in accordance with G600.
Additional instructions:
This standard can be purchased from China Shipbuilding Industry Corporation No. 603. This standard is drafted by Dalian Institute of Design and Reform, and No. 603 and the valve factory participated. The main drafter of this standard is Man Shiming.
This standard was formulated as national standard GH59-65 in 1955. Add standard number
GB8439
CER 883
Village and Taiwan GB9439
Production standard
White From the month when this standard is implemented, the original foreign trade standards CBM81-B15AV10 flange and HM84-812PN16 flange will be used as the standard.
This standard has unified implementation. 1 Drawing submission.
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