This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine flange bronze 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 250°C. GB/T 588-1993 Marine flange bronze stop check valve GB/T588-1993 standard download decompression password: www.bzxz.net

UDC 629. 12. 01 621. 646. 2U52
National Standard of the People's Republic of China
GB/T 588-93
Marine bronze flanged stop check valves
Marine bronze flanged stop check valves1993-05-24Promulgated
National Technical Supervision Bureau
1994-01-01Implementation
W.National Standard of the People's Republic of China
Marine bronze flanged stop check valvesSubject content and scope of application
GB/T588-93
Replaces GB58-84
This standard specifies the flange connection dimensions according to GB 569, GB Product classification, technical requirements, test methods, inspection rules, marking and packaging of 250I marine flange back copper stop check valve (hereinafter referred to as stop check valve). This standard is applicable to ship piping systems with media such as seawater, fresh water, lubricating oil, fuel oil and steam with a temperature not exceeding 250℃. 2 Reference standards
GB6° flange connection dimensions and sealing surface
GB600 General technical requirements for ship pipeline valves GB2501 Marine flange connection dimensions and sealing surface (four-digit) GB 3032 Marking of ship pipeline accessories
GB11698 Structural length of marine flange-connected metal valves ZB/T U52001 Wall thickness of marine casting valves
3 Product classification
3.1 The types of stop check valves are as follows: Type A - straight-through stop check valve with flange connection dimensions according to GB569; Type B - right-angle stop check valve with flange connection dimensions according to GB569; Type AS - true-through stop check valve with flange connection dimensions according to GB2501; Type RS - right-angle stop check valve with flange connection dimensions according to GB2501. 3.2 The basic parameters of stop check valves are as shown in Table 1. Table 1 Nominal length PN 3.3 Structural dimensions of type A and type B stop check valves are as per Figure 1, Figure 2 and Table 2. Approved by the State Technical Supervision Commission on May 24, 1993 Nominal diameter DN 125~150 15~150 65~-150 15~125 1994-01-01 Implementation W.bzsoso: com Nominal Figure 1 Type A, Type AS Overall dimensions Type A Type GB/T 588-93 Type B, RS Type
W. Nominal
Overall dimensions
FA type R type
GB/T58893
Continued Table 2
3.4AS type, BS type stop check width structural dimensions - according to Figure 1, Figure 2 and Table 3. Table 3
Overall dimensions
AS type 35 type AS type BS type
480225
M20280
A type Yanzhi
AS type BS type
W. Nominal
Overall dimensions
AS type
AS type BS type
3.5. Marking example
GB/T588—93
Continued Table 3
M20|250
M24280
AS type BS type
Nominal pressure is 2.5MPa, nominal diameter is 65mm, according to GB Marine flange straight-through stop check valve with flange connection dimensions and sealing surface of GB/T 569, stop check valve A25065GB/T 588-93 with nominal pressure of 1.6 MPs and nominal diameter of 150 mm, marine flange back-stemmed right-angle stop check valve with flange connection dimensions and sealing surface (read advance) of GB 2501; Stop check valve BS16150GB/T588-93 4 Technical requirements 4.1 Technical requirements for stop check valves shall be in accordance with GB 600. 4.2 The main parts and materials of stop check valves shall be in accordance with Table 4. Bag 4
Parts name
QSn10-21 or
ZQSn5-5-51
QA19-2
4:3 Flange connection dimensions of stop check valves shall comply with GB569 and GB2501 respectively. 4.4 The structural length of AS type and BS type stop check valves shall comply with GB11698. 4.5 The wall thickness of the stop check valves shall comply with ZB/TU52001. 5 Test methods and inspection rules
5. 1 The test method of stop check valve shall comply with GB 600. Song Ya number
CB 883
GB4429
W.bzsoso：com5. 2 The items of type inspection and factory inspection shall comply with Table 5. Sequence
GB/T 5B8—93
Chemical content inspection
Appearance inspection
Strength water pressure test
Sealing water pressure test
Each stop check valve shall be inspected item by item according to Table 5, and can be shipped only after passing the inspection5.3
6 Marking and packaging
6.1 The marking of stop check valves shall be in accordance with GB3032.
6.2 The packaging of stop check valves shall be in accordance with GB600.
Additional remarks:
This standard is proposed by China State Shipbuilding Corporation. This standard is under the jurisdiction of 603 Institute of China State Shipbuilding Corporation. This standard was drafted by Dalian Ship Design Institute with funding. 603 Institute and 6502 Institute participated in the drafting. The main drafter of this standard is Li Yu.
Complies with the provisions of CB883
Complies with the provisions of G600
This standard was formulated as the national standard GB 588-65 in 1965, revised for the first time as GB 588-76 in 1976, and revised for the second time as GB5B8-84 in 1984. Www.bzxZ.net
From the date of implementation of this standard, the foreign trade standards CBM 70-81 PN6 flange stop check valve, CBM 73-81 PN10 flange copper stop check valve, CBM 76-B1&PN16 flange bronze stop check valve, CBM 102--81&PN25 copper stop check valve are used as the national standard.
This standard is provided with a unified construction drawing.
W.
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