This standard specifies the product classification, technical requirements, inspection rules, marking and packaging of marine drinking water tank injection joints. This standard applies to pipe joints that connect ship pipes to drinking water supply system pipes. GB/T 5742-1999 Marine drinking water tank injection joints GB/T5742-1999 Standard download decompression password: www.bzxz.net

1ics 47.020.30
National Standard of the People's Republic of China
GB/T5742.1999
Filling connection for drinking water tanks on ships1999-04+15 Issued
1999-12-01 Implementation
National Quality and Technical Supervision Bureau Issued
W.GB/T 5742—1999
This standard is based on IS0 5620-:,1992 Shipbuilding and offshore structures Drinking water tanker filling connection Part 1 Part of the general requirements, IS05620-2:1992 Shipbuilding and marine structures Water tank injection joints Part 2 Parts ≥. This standard is a revision of GB/T5742-1985. It is equivalent to the international standard in terms of technical content. In terms of abbreviation format, it is a non-equivalent international standard, and the two standards are combined into one standard. When revising this standard, the small water supply flange of "Part 2" is listed in the body of this standard, which is a part used in conjunction with the injection joint. The main technical differences between this standard and GB/T57412
21985 are as follows:
Add the chain of the connected padlock.
Sealing material selection (J33588-1994% marine flange non-asbestos gasket\. Add reference control according to the installation method and serve as a reminder appendix. The permanent flange will be listed separately in the article... for users to choose. The water supply legal interest is installed on the water supply source pipeline to connect with the standard injection joint.
This standard shall be replaced by GB/T57421985 from the date of implementation. bZxz.net
This standard This standard was proposed by China State Shipbuilding Corporation. This standard was drafted by Liaoning Jianhai Shipyard and China Shipbuilding Corporation Comprehensive Technology and Economic Research Institute. The main drafters of this standard are: Chu Yuzhen, Hu Zhengwen and Wu Shaozeng. This standard has unified functions.
W.1 Scope
National Standard of the People's Republic of China
Filing connection for drinking water tanks on shipsGB/T 5742-1999
(GB/T57421985
This standard specifies the product classification technical requirements, inspection rules, marking and packaging of marine drinking water injection joints (hereinafter referred to as injection joints).
This standard applies to pipe joints that connect ship pipelines to drinking water supply system pipelines. 2 Reference standards
The following standards contain texts. By citing them in this standard, they constitute the provisions of this standard. When this standard is published, the indicated standards are valid. All standards are valid. All will be revised, and the parties using this standard should discuss the possibility of using the latest version of the following standards. CB/Z343-1984 Hot-dip galvanizing general process
3 Product classification
3.1 The basic parameters of injection joints and water supply flanges are shown in Table 1. Table 1 Basic parameters of witness joints
Injection head
Water supply flange
Nominal pressure PN
3.2 The structure and basic dimensions of injection joints are shown in Figure 1. State Administration of Quality and Technical Supervision 1999-04-15 Approved nominal diameter DN
Avoided medium
Recovered water
1999-12-01 implementation
WT
GB/T5742-1999
/ Injection joint open when the difference in the amount of culture
1 - water flange; 2 when the flange, 3-nut: 4-stud screw 5-toxic gasket F 5---locking, 7-hook; 8-chain Figure 1 Structure and basic dimensions of injection joint 3.3 Basic dimensions of water supply flange See Figure 2.
Figure Basic dimensions of water supply flange
4 Marking example
Nominal diameter 65mm, nominal positive force 1.6 MP marine boat witness joint - marked as: injection joint 65GB/T5742-1999
Nominal diameter 65 mm. The water supply flange with a nominal pressure of 1.6 MPa is marked as: Water supply flange G65GBT57421999
W.bzsoso:com5 Technical requirements
5. 1 The materials of the main parts of the injection joint are shown in Table 2. GB/T 5742—1999
Table 2 Materials of main parts of injection joints
Part name
Water injection flange
Baikuai flange
Water supply flange
Aramid flange
Note: For sealing materials, non-toxic sealing materials suitable for drinking water are allowed to be used, material
Q235-A
KQC-002
5.2 The surface of each part of the injection joint should be smooth, and there should be no defects that reduce strength and affect sealing performance. Standard enzyme number
GB/T 7001988
CB:T :RR.
5.3 The pin parts should be hot-dip galvanized according to CB/2313, and the coating thickness is 20~-30μmt. 5.4 After the injection joint is assembled, a hydraulic sealing test shall be carried out at p1-2.0MPa. The pressure time shall not be less than 5min. There shall be no leakage.
5.5 The injection joint shall be equipped with a control pin that can resist corrosion. When in use, it shall be sealed with a plate and locked, see Figure 1. 5.6 The injection joint and the water supply flange are connected by a special five-hole method. The injection flange is installed on the potable water tank of the ship pipeline for easy use: the water supply flange is installed on the pipeline leading from the supply source, see Figure 3 and Appendix A (Reminder Appendix). To the pipe value of the water supply ticket or the sensitive pipe water supply Nolan double head
Yangshui flange
To the pipeline of the water danger
Figure 3 Note the connection mode of the joint
W. Inspection rules
GB/T 5742—1999
Note the joint should be checked piece by piece according to the unified construction drawings for size and appearance quality. 6.1
6.2 Note the joint manufacturer's technical inspection department to accept and issue a certificate of conformity. 7
Marking and packaging
The following marks should be on the nameplate of the joint: a) manufacturer's name;
b) product name and standard number;
c) production date;
d) inspection seal.
7.2 Products are shipped in batches! When processing the surface oil seal, pack it with non-toxic oil paper and put it into wooden box, and press it with soft lining strips. 4
W.bzsosocom41 The installation position of the injection joint is shown in Figure Al
GB/T5742—1999
Appendix A
Appendix of Tips)
Injection joint installation position
Figure A1 Injection joint installation position
W.
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