This standard specifies the structural length and tolerance of various types of marine flange-connected metal valves to ensure interchangeable installation dimensions. This standard applies to marine metal valves with nominal diameter N10-800mm, nominal pressure PN0.1-6.4MPa, and flange connection dimensions in accordance with GB2501 "Marine flange connection dimensions and sealing surface (four-position)". GB 11698-1989 Structural length of marine flange-connected metal valves GB11698-1989 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Metal valves for use in marine flanged pipesystems --Face- to- face and centre-to-face dimensions
GB11698-89
This standard adopts [International Standard 1SO5752-1982 (E) "Structural Length of Flange-Connected Metal Valves". 1 Subject Content and Scope of Application
This standard specifies the structural length and tolerance of various marine flange-connected metal valves to ensure the interchangeability of the installation dimensions used. This standard is applicable to marine metal valves with nominal diameter D~10~800mm, nominal pressure P~0.1~6.4MPa, and flange connection dimensions in accordance with GB2501 "Marine Flange Connection Dimensions and Sealing Surfaces (Four-digit)". 2 Reference standards
GB2501 Marine flange connection dimensions and sealing surfaces (four-digit) GB1047 Nominal diameter of pipes and pipeline accessories GB1048 Nominal pressure and test pressure of pipes and pipeline accessories 3 Terms and diagrams
3.1 Terms
3.1.1 Structural length (for straight-through valves) The distance between the two planes perpendicular to the valve axis at the end of the valve body channel, expressed in mm. 3.1.2 Structural length (for right-angle valves) The distance between the plane perpendicular to the axis at one end of the valve body channel and the axis of the other end of the valve body, expressed in mm. 3.2 Diagrams
3.2.1 See Figure 1 for valves. bzxZ.net
a. Type gate valve
Approved by the State Administration of Technical Supervision on October 14, 1989
b. Parallel sliding gate valve
1990-0501 implementation
Free market
3.2.2 Wafer butterfly valve See Figure 2.
3.2.3 Plug valve and ball valve See Figure 3.
GB 11698-89
a, conical and cylindrical plug valves
3.2.4 Straight-through stop valve See Figure 4.
5 Right-angle stop valve See Figure 5.
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3.2.6 Lift straight-through check valve See Figure 6. 3.2.7 Lift right-angle check valve See Figure 7. 3.2.8 Swing check valve See Figure 8.
GB11698—89
Note: The figure is only an illustration of the valve type and cannot be used as a schematic diagram or structural diagram. Dimensions and tolerances
4.1 The basic series of structural lengths shall be in accordance with Table 1, and the tolerances shall be in accordance with Table 2. Marking authorization network ww.bEo8c.cn various marking industry data free download Dx
Nominal diameter
Basic series
Nominal diameter
Basic series
Structural length
>250～500
>500～800
800～1000
≥1000～1600
600 ~2 250
GB 11698—89
Basic series of structural length
Tolerance of structural length
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GB 11698-89
4.2 Structural length of various marine flange-connected metal valves The structural length of straight-through valves, rotary valves, ball valves, and swing check valves shall be based on the basic series (1). The structural length of right-angle valves shall be based on the basic series (2). The structural length of gate valves shall be based on the basic series (3) or (6). The structural length of wafer-type butterfly valves and wafer-type butterfly check valves shall be based on the basic series (4) or (5). Additional notes:
This standard was proposed by the Ship Standardization Technical Committee. This standard is under the jurisdiction of Dalian Shipyard.
This standard was drafted by Dalian Shipyard.
The main drafter of this standard is Qiu Jinquan.
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