This standard specifies the product classification, technical requirements, test methods, inspection rules, marking and packaging of marine flange cast iron double-row stop valve boxes with flange connection dimensions in accordance with GB569 and GB2501. This standard is applicable to pipeline systems with seawater and fresh water as the medium. GB/T 2499-1993 Marine flange cast iron double-row stop valve boxes GB/T2499-1993 Standard download decompression password: www.bzxz.net

1'D;629. 12- C1 : 621. 646. 2152
National Standard of the People's Republic of China
GE/T 2499—93
Marine cast iron flange dual-raw slop valves-case1993-05-24 Issued
State Bureau of Technical Supervision
1994-01-01 Implementation
National Standard of the People's Republic of China
Marine cast Tron Flange dual-row stop valve box
valves-case1 Subject Content and Scope of Application
GB/T2499-93bZxz.net
This standard specifies the product classification, installation requirements, testing, inspection regulations, labeling and packaging of marine flange cast double-row valve boxes (hereinafter referred to as valve boxes) with flange connection dimensions in accordance with GB569 and GB2501. This standard is applicable to pipeline systems with seawater and water as the medium. 2 Reference standards
GB569 Marine flange connection dimensions and sealing surface GB2500 General technical conditions for pipeline valves GB2501 Marine flange connection dimensions and sealing surface (four-digit) GB3032 Marking of ship pipe fittings
ZB/TU52001 Casting flange connection dimensions for cylinders
3 Product classification
3.1 The types of flanges are defined as follows:
The connection dimensions are based on the two-way flange of GB569: RS type - flange connection dimensions are based on the two-way flange of GH2501; S type - flange connection dimensions are based on the three-way flange of GB560: SS type - flange connection dimensions are based on the three-way flange of GR2601. 3.2 The basic parameters of the valve box shall be in accordance with Table 1.
3.3 Structural dimensions of the valve box
Nominal pressure P
3.3.1 The configuration and support positions of the valve box shall be in accordance with Figure 1 and Figure 2. 3.3.2 The structural dimensions of the valve box of R type shall be in accordance with Table 2. 3.3.3 The structural dimensions of the valve box of RS and SS types shall be in accordance with Table 3. Approved by the Technical Supervision and Sales Bureau on May 24, 1993, nominal diameter DN, /N,
40/50~~150/200
200/250~250/300
1994-01-01 actual bottle
NM4b/o~Bn/tu
GI/T 2499---93
./LW, 10ry125 an/300
GR/T2499-93
alt oe
public production
CB/T 2499-
International limit
3.4 ​​Marking example
GD/12499-93
Nominal pressure is 1.0MPa. Nominal diameter is DN, imm, DN80m. According to GB569 common flange connection size and sealing surface, the double-jointed marine flange effect is intended for double-holding condensation and stuffy box: brush box R10065/80GB/T2493-93
Nominal end 0. 6MPz, nominal diameter N, 200mm, ND, 25m. Three-way marine flange steel double row stop box with GB2501 flange connection dimensions and sealing surface (four-position): SS6200/250GB/T2499-93
4 Technical requirements and test methods
4.1 Technical requirements for box according to GB600
4.2 The main parts and materials of the box according to Table 4. Table 4
Parts name
Aluminum system
Paste system
Stop the discussion
4.3 Method reverse connection dimensions and sealing installation GB569, GB2501. The wall thickness of the cage shall be in accordance with ZB/TU52001
4.5 Test method G600.
5 Inspection rules
5.1 Factory inspection
5.1.1 Each group of cages shall be inspected in succession and can only be shipped out after passing the inspection. 5.1.2 Inspection items shall be checked in accordance with Table 5.
5.2 Type inspection
5.2.1 Type inspection shall be carried out in the following cases: a.
New products or old products are produced by the factory and the type is determined: Material
Standard No.
ZASn5 E-5
Take Sr.1021F
2QA15-2
After formal production, if the process is greatly changed, which may affect the product performance: When the national quality supervision agency proposes the requirement for type inspection, 5.2.2
Items of elastic compensation shall be in accordance with Table 5.
GB9439
CB B83
GB4429
CB 883
6 Marking and packaging
CB/T2499-93
Mechanical properties of express delivery, external reverse test
Water resistance test
6.1 The marking of the bundle box shall be in accordance with GB3032
6.2 The packaging of the box shall be in accordance with GB600
Additional instructions:
This standard is proposed by China Shipbuilding Industry Corporation. English
9 in accordance with GH 439, CRK83
Conforms to GBSGO
This standard is also under the jurisdiction of the National Marine Machinery Standardization Technical Parts Committee Pipeline Annex Sub-Technical Committee. This standard was drafted by Jiangnan Shipyard, with participation from 603 Institute. The main drafters of this standard are Zhou Dexing and Lin Yizhun. The standard is provided with the unified drawing.
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