This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine flange cast iron single-row suction stop valve boxes (hereinafter referred to as suction stop valve boxes) with flange connection dimensions in accordance with GB 569 and GB 2501. This standard is applicable to marine piping systems with seawater and fresh water as the medium. GB/T 1854-1993 Marine flange cast iron single-row suction stop valve boxes GB/T1854-1993 Standard download decompression password: www.bzxz.net

UDC 629. 12. 01 : 621. 646. 2u 52
National Standard of the People's Republic of China
GB/T 1854~~1856---93
Marine flanged cast iron single arrangement box valve
Promulgated by the State Administration of Technical Supervision
W.National Standard of the People's Republic of China
Marine flanged cast iron single arrangement box valve
1 Subject content and scope of application
GB/T 185493
#GB18-
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine flange cast iron single row inlet stop valve boxes (hereinafter referred to as inlet stop valve boxes) with flange connection dimensions according to GB569.GB2501. This standard applies to marine piping systems with seawater and fresh water as the medium. 2 Reference standards
GB 569 Size and sealing surface of flange connection for lead-acid gas pipeline GB 600 General technical conditions for valves for marine pipelines GB 2501 Size and sealing surface of flange connection for marine vessels (four-digit) GB 3032 Marking of marine pipeline accessories
ZB/TU52001 Wall thickness of marine casting valves
3 Product classification
3.1 The types of suction stop valve boxes are specified as follows: R type -
Flange connection size is in accordance with GB569 for two-way suction stop valve box; flange connection size is in accordance with GB 2501 for two-way suction stop valve pin; flange connection size is in accordance with GB 569 for one-way suction stop valve box; flange connection size is in accordance with GB2501 for three-way suction stop valve box. SS type -
3.2 Basic parameters of suction stop valve box are in accordance with Table 1. Table 1
3.3 Structural dimensions of inlet stop valve boxes.
Nominal pressure PN
3.3.1 The structural type and support position of the inlet stop valve box shall be in accordance with Figures 1 and 2. 3.3.2 The structural dimensions of the R and S type suction stop valve boxes shall be in accordance with Table 2. 3.3.3 The structural dimensions of the RS and SS type suction stop valve boxes shall be in accordance with Table 3. Approved by the State Technical Supervision Bureau in 1993-0524
Nominal diameter DN/DN:
40/50~15r:/20
200/250-~250/300
1994-0101 implementation
W.(JN40/50-
GE/T 1854-- 93
[Figure suction stop valve box
Figure 2 support seat reservation
(DN100/125 ~250/300)
W.GB/T 1854—93
g·191
st8 gt
Wall thickness "
Combustion-assisted fire prevention
W.93
GB/F1854
81—8
W.GB/T 1854
3.4 ​​Marking example
Nominal pressure is 1.0MPa, nominal diameter is 1N, 50mn, DN.65mm, according to the flange connection size and case of GB569, the flange cast iron single row single suction cut-off valve box: Suction cut-off alarm box R10050/65 (B/T1851—93 nominal pressure is 0.6MPa nominal diameter is DN200mm, DN2250mm, according to (B2501 flange connection size Inch and mil surface (four-position) marine flange single row flange suction stop valve box: suction stop valve box SS6200/250GB/T1854-934 technical requirements
4.1 Technical requirements for suction stop valve box in accordance with GB600. 4.2 Suction stop valve box should be made of cold parts according to length 4. Length 4
Parts name
Muffle, wide dish bzxZ.net
Gear pot special copper
Aluminum
Aluminum bronze
11 20n
Standard number
G13 24398x
ZQSrb-5-5
7QA19-2
4.3 The flange connection and sealing direction of the suction cut-off valve box shall be in accordance with GB569 and GB25CI:4.4 The casting wall thickness of the suction cut-off valve box shall be in accordance with ZR/TL52(1014.5 The test rules and methods of the suction cut-off valve box shall be in accordance with B6005 inspection rules
5.1 Factory inspection
5.1.1 The suction cut-off valve box shall be inspected item by item and can only be shipped after passing the inspection. 5.1.2 Factory inspection items are as shown in Table 5. 5.2 Type inspection 5.2.1 Type inspection should be carried out in any of the following cases: Trial production and identification of new products or old products transferred to the factory for production: After formal production, if there are major changes in the process that may affect product performance: When the national quality supervision agency proposes a requirement for type inspection. 5.2.2 Type inspection items and inspection requirements are as shown in Table 5. 8883
Ci13 44208.T
C 8833
W. Standard
6 Marking and packaging
GB/T185493
Inspection items
Primary performance test and chemical analysis of external spot check
Strength water test
Secret taste water pressure test
6.1 The marking of the inhalation stop reading box shall comply with GB3032. 6.2 The packaging of the inhalation stop reading box shall comply with GB 600 Additional instructions:
This standard is proposed by China Shipbuilding Industry Corporation: Inspection requirements
Conform to G39435.CH883
Conform to G13 601
This standard is under the jurisdiction of China Shipbuilding Industry Corporation 603. This standard is issued by the Ministry of Shipping! The 603 Institute of the National Ship Auction Industry Corporation participated in the drafting. The main drafters of this standard are Liu Kaixiang, Sun Yinglin, Wu Shaozeng, and Mao Peifang. This standard is implemented in a unified manner. The above drawings are provided.
W.
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