This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine cast steel vertical check valves. This standard is applicable to marine piping systems for seawater, fresh water, fuel oil and lubricating oil. GB/T 11696-1996 Marine cast steel vertical check valve (four-position) GB/T11696-1996 Standard download decompression password: www.bzxz.net

EC'S.47.020.30
National Standard of the People's Republic of China
GB/T11696—1996bzxz.net
Marine cast steel erect check valves
Marine cast steel erect check valvesPublished on 1996-03-28
Implemented on 1996-11-01
Published by the State Bureau of Technical Supervision
W.National Standard of the People's Republic of China
Marine cast steel erect check valves
Marlne cast aleel erect check valvesSubject content and applicable scope
GB/T 11696-1996
Replaces G3 1169689
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine cast steel erect check valves (hereinafter referred to as check valves).
This standard applies to marine pipe systems for seawater, water, fuel and lubricating oil. 2 Reference standards
GB 569-65 Marine flange connection dimensions and sealing surface GH 600-91 General technical conditions for temporary marine pipe fittings GB2501-B9 Marine flange connection dimensions and sealing surface (four-digit) GB3032-B9 Marking of general marine pipe accessories ZB/T U52 001-89 Wall thickness of marine static valves 3 Product classification
3.1 Check valve types are specified as follows:
Type A - flange reverse connection dimensions are in accordance with the check valve of GB 569: AS
Flange connection dimensions are in accordance with the check valve of GB 2501. 3.2 Basic parameters of check valves are as per Table 1. 3.3 Structure and basic dimensions of type A check valves are as per Figure 1 and Table 2. Approved by the State Bureau of Technical Supervision on March 28, 1996 P 100~300 1996-11-01 Implementation W. Nominal diameter GE/T 11696--1996 3.4 Structure and basic dimensions of type AS check valves are as per Figure 1 and Table 3. Nominal diameter given in Table 3 W. 3.5 Marking examples GB/T 11696---1996
Nominal pressure is 1.0MPa, nominal diameter is 100mm, according to GB and 59 flange connection size and sealing surface of cast copper vertical check valve: Check valve A1010GGB/T116961996
Nominal pressure is 1.0MPa, nominal diameter is 100mm. According to GB2501 flange connection size and sealing surface (four-digit> cast steel vertical positive return width:
Check valve AS10100GB/T 11696-19964 Technical requirements
4. 1 The materials of the main parts of the check valve shall be in accordance with Table 4. Table 4
Female body, valve cover
Broad plate, upper and lower sleeves
Cast pot copper
4.2 The flange connection size and sealing surface of the check valve shall be in accordance with GB569 or GB2501. 4.3 The thickness of the check valve shall be in accordance with ZB/T U52 001. 4.4 Other technical requirements of the check valve shall be in accordance with GB 600.5 Test methods and inspection rules
5.1 The test method of the positive return valve shall be in accordance with GB600, 5.2 The items of the factory inspection of the positive return valve shall be in accordance with Table 5 Table 5
Mechanical properties and chemical composition of cast steel
Appearance inspection
Strength and material tightness test
Liquid tightness test
5.3 Each check valve can be shipped after passing the inspection item by item in Table 5. 6 Marking and packaging
6.1 The marking of the check valve shall be in accordance with GB 3032.
6.2 The packaging of the check valve shall be in accordance with GB 600.
Additional remarks:
This standard was issued by China Shipbuilding Industry Corporation. This standard was under the jurisdiction of China Shipbuilding Industry Corporation 6(13). This standard was also drafted by Dalian Ship Design Institute. The main contributors to this standard are Wu Hengen and Qiu Jin Pump. This standard is provided with a unified construction sample.
ZG: 230-450
ZQST10-2
Biaodihao
CB 772—86
(R88383
Comply with Article 4.2
According to the provisions of GR SGO
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