GB/T 1856-1993 Marine flange cast iron single row discharge stop valve box GB/T1856-1993 standard download decompression password: www.bzxz.net

unt: 629. 12. 01 : 621. 646. 2U52
National Standard of the People's Republic of China
GB/T18541856--93
Marine flanged cast iron single arrangement box valve
National Technical Supervision Fan Release
W.bzsoso.cOINational Standard of the People's Republic of China
Marine flanged cast iron single arrangement exhaust slop box valve
1 Subject content and scope of application
GB/T 1856 --93
#GB18580
This standard specifies the product classification, technical requirements and test methods, inspection rules, marking and packaging of marine flange cast iron single-row discharge stop valve boxes (hereinafter referred to as discharge stop valve boxes) with flange connection dimensions in accordance with GB569 and GB2501. This standard applies to the marine piping system with seawater and fresh water as the medium. 2 Reference standards
GH569 Marine flange connection dimensions and sealing surface GB 600 General technical conditions for marine pipeline valves GH250) Marine flange connection dimensions and sealing surface (quadruple) GI3032 General specifications for marine pipeline attachments
ZB/TU52001 Wall thickness of marine casting valves
3 Product classification
3.1 The types of discharge stop valve boxes are specified as follows: R type - two-way discharge stop valve box with flange connection dimensions according to GB 69 RS type - two-way discharge stop valve box with flange connection dimensions according to GR2501 S type - three-way discharge stop valve box with flange connection dimensions according to GB569: SS type - three-way discharge stop valve box with flange connection dimensions according to GB 2501. 3.2 The basic parameters of the discharge stop valve box are as shown in Table 1. Table 1
Nominal pressure PN
R, RS
3.3 Dimensions of the junction box for the truncated valve.
3.3.1 The structural type and support position of the discharge stop valve box shall be in accordance with Figures 1 and 2. 3.3.2 The structural dimensions of the R type and S type discharge stop valve box shall be in accordance with Table 2. 3.3.3 The structural dimensions of the RS type and SS type discharge valve pin shall be in accordance with Table 3 Approved by the State Administration of Technical Supervision on July 21, 1993
Nominal diameter DN
40--1541
20--250
Implemented on March 1, 1994
W.14
CB/T 1856- 93
Figure 1 Discharge stop box
Figure 2 Support positionWww.bzxZ.net
(N250)
W.GB/T 1855 -- 93
W/.bzsoso.cOm93
GA/T1856
18-80g
81--21
W.GB/T1856-93
3.4 ​​Marking example
Nominal pressure is 1.0MPa, nominal diameter is 50mrEl. According to the flange connection size and tightness of GB569, the opposite side of the marine flange cast iron single-row double-row discharge mountain stop valve box:
Discharge stop valve pin R10050G3/T185693 nominal pressure is 0.6Mla. Nominal diameter is 200mm, according to the flange connection size of GB2501 and the cover (four-position selection> flange bell iron single-row triple discharge stop valve box: discharge stop box S56200 (G3/T1856-934 technical requirements
4.1 Technical requirements for discharge stop box according to GB6004.2 Discharge stop valve box parts materials according to Table 4. Table 4
Parts name
Body, valve
Teaching tin blue
Lead blue Zhao
Yan Qingtong
Hr 200
ZQSn5-5-5
QAIL-2
ZQ419-2
4.3 The flange connection and sealing of the discharge stop valve box shall be in accordance with GB569.GB2501. 4.4 The casting wall thickness of the discharge stop valve box shall be in accordance with ZB/TL:52001. 4.5 The test rules and methods of the discharge stop valve box shall be in accordance with the inspection rules of GB6GO5. 5.1 Inspection and testing
5.1.1 The discharge stop valve shall be inspected item by item before it can be installed in the factory. 5 1. 2.2 Inspection items shall be in accordance with Table 5.
5.2 Type inspection
5.2.1 Type inspection shall be carried out in any of the following cases: a. Trial production of new products or old products for transfer to other factories for type identification; b. After formal production, the process has changed significantly, which may affect the product performance; 5.2.2 Inspection items and requirements for type inspection shall be in accordance with Table 5. Type No.
G3 9435
W. Sequence
6 Marking and packaging
GB/T 1856—93
Inspection items
Determination of mechanical properties and chemical composition analysis of parts
Strength water pressure test
Seal pressure test
6.1 Marking of the end-of-line packaging shall be in accordance with GI 3032.6.2 The packaging of the discharge cut-off threshold box shall comply with GB 600. Additional remarks:
This standard is proposed by China State Shipbuilding Corporation: This standard is approved by the 603 Institute of China State Shipbuilding Corporation. Inspection requirements
Conform to GB 9139, CB 883
Greek Council (E 6CO
This standard is drafted by Yudao Valve Factory, and the main drafters of this standard are Liu Kaiyang, Sun Yinglin, Wu Shaozeng, and Mao Peifang. This standard is provided with the construction drawings.
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