GB/T 586-2015Marine cast steel flanged check valves (English PDF)
船用法兰铸钢止回阀
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 3, 2015
Implementation date
October 1, 2015
Scope
GB/T 586-2015 is the English-translated version of 船用法兰铸钢止回阀.
GB/T 586-2015 is the Chinese standard "Marine cast steel flanged check valve".
Its scope clause reads: This Standard specifies the classification and marking, requirements, test methods, inspection rules, packaging and storage for marine cast steel flanged check valve of flange connection size and sealing surface according to GB/T 4196, GB/T 2501 (hereinafter referred to as check valve).
This Standard is applicable to the design, manufacture and acceptance of check valve for steam piping system of which the mediums are fresh water, lubricating oil, fuel and temperature does not exceed 300°C. Its clauses include classification and marking; requirements; test methods; inspection rules; packaging and storage.
It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on JULY 3, 2015 and took effect on OCTOBER 1, 2015.
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Document preview — GB/T 586-2015
National Standard of the People's Republic of China
- ICS
- 47.020.30
- Classification
- U 52
- Replacing
- GB/T 586-1999
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative references4
- 3 Classification and marking5
- 4 Requirements9
- 5 Test methods11
- 6 Inspection rules12
- 7 Packaging and storage13
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 586-1999 Marine cast steel flanged check valves. Compared with GB/T 586-1999, the main technical modifications are as follows.
- added AS type, BS type PN16, DN65 and DN80;
- changed valve body, bonnet, valve plate materials;
- changed valve body, bonnet sealing surface surfacing materials;
- modified structure size according to construction drawings;
- modified marking method;
- modified flange sealing surface size and bolt hole number according to GB/T 2501;
- modified processing requirements according to GB/T 600.
1 Scope
This Standard specifies the classification and marking, requirements, test methods, inspection rules, packaging and storage for marine cast steel flanged check valve of flange connection size and sealing surface according to GB/T 4196, GB/T 2501 (hereinafter referred to as check valve).
This Standard is applicable to the design, manufacture and acceptance of check valve for steam piping system of which the mediums are fresh water, lubricating oil, fuel and temperature does not exceed 300°C.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 600-2008, General specifications for marine piping valves and fittings
GB/T 699-1999, Quality carbon structural steels
GB/T 983-1995, Stainless steel covered electrodes
GB/T 1184-1996, Geometrical tolerancing--Geometrical tolerance for features without individual tolerance indications
GB/T 1220-2007, Stainless steel bars
GB/T 1804-2000, General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications
GB/T 1958, Geometrical product Specifications (GPS) - Geometrical tolerance - Verification prescription
GB/T 2501, Connection dimensions and mating face of marine flanges
GB/T 3032, Marks for Marine Piping Valves and Fittings
GB/T 11698, Metal valves for use in marine flanged pipe systems - Face-to-face and center-to-face dimensions surface steel Bushing Stainless steel 20Cr13 GB/T 1220-2007
4 Requirements
4.2 Casting
The check valve castings per furnace shall be at least 3 test bars for reference with furnace number. The shelf life shall not be less than 3a.
4.3 Strength
The check valve body strength, at 1.5 times design pressure of hydraulic pressure, shall have no leakage.
4.4 Sealability
The check valve is in the reverse state. There shall be no leakage between valve plate and valve seat when the sealing surface is reduced from 1.1 times the design pressure to 0.3 MPa.
4.5 Dimensional tolerance
4.5.1 The wall thickness tolerance of check valve shall meet requirements of 3.4 in GB/T 600-2008.
4.5.2 The unnoted linear dimensional tolerance of check valve shall meet requirements of grade m in GB/T 1804-2000.
4.5.3 The structural length tolerance of check valve shall meet requirements of GB/T 11698.
4.6 Geometric tolerance
The geometric tolerance of check valve shall meet requirements of grade K in GB/T 1184-1996.
4.7 Appearance
The check valve appearance shall meet requirements of 3.10 in GB/T 600-2008.
4.8 Mass
See Table 2, Table 3 for check valve mass. The positive deviation of its mass shall not exceed 4% of the theoretical mass.
4.9 Mark
The mark for check valve shall meet requirements of GB/T 3032.
6 Inspection rules
6.2.3 Quantity of inspection sample
The sample quantity for check valve type inspection shall be 3.
6.2.4 Determination rules
When all inspection items of check value meet requirements, the type inspection shall be qualified. If material has unqualified check valve, the type inspection shall be determined as unqualified. If there are other unqualified items, it shall double sampling for re-inspection. If the re-inspection meets requirements, the type inspection of check valve shall be determined as qualified. If there is still unqualified item in re-inspection, the type inspection of check valve shall be determined as unqualified.
6.3 Exit-factory inspection
6.3.1 Inspection items and sequence
The exit-factory inspection items and sequence of check valve shall be in accordance with the provisions of Table 5.
6.3.2 Inspection quantity
For inspection items of check valve, the material inspection shall be carried out in batches; other inspection items shall be carried out in products one by one.
6.3.3 Determination rules
The check valve of which all inspection items meet requirements shall be determined as qualified in exit-factory inspection. If the material of the check valve does not meet requirements, this batch shall be unqualified in exit-factory inspection. For inspection of other item, if there is unqualified check valve, the re-inspection shall be carried out after rework. If the re-inspection meets the requirements, this check valve shall be determined as qualified in exit-factory inspection. If the re-inspection still does not meet requirements, this check valve shall be determined as unqualified in exit-factory inspection.
7 Packaging and storage
7.1 Packaging
The packaging of check valve shall be carried out according to the provisions
8 Mark - - 4.9 5.8
NOTE - for inspection item required; - for inspection item not required. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 600-2008General specifications for marine piping valves and fittings
- GB/T 699-1999Quality carbon structure steels
- GB/T 983-1995Covered electrodes for manual metal arc welding of stainless and heat-resisting steels
- GB/T 1184-1996Geometrical tolerancing. Geometrical tolerance for features without individual tolerance indications
- GB/T 1220-2007Stainless steel bars
- GB/T 1804-2000General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
Similar standards
Editions of GB/T 586
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 586-2015 | Marine cast steel flanged check valves | current edition | Current |
| GB/T 586-1999 | Marine cast steel flanged check valves | previous edition | Superseded |
This page sells the current edition, GB/T 586-2015. Earlier editions are listed for reference only.
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Related Standards
GB/T 11698-2008 — Metal valves for use in marine flanged pipe systems -- Face-to-face and center-to-face dimensions
GB/T 1184-1996 — Geometrical tolerancing. Geometrical tolerance for features without individual tolerance indications
GB/T 1220-2007 — Stainless steel bars
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