GB/T 589-2015 English PDF (GBT589-2015)

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GB/T 589-2015: Marine bronze flanged check valves
GB/T 589-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 47.020.30
U 52
Replacing GB/T 589-1993
Marine bronze flanged check valve
ISSUED ON. JULY 3, 2015
IMPLEMENTED ON. OCTOBER 1, 2015
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Classification and marking ... 5 
4 Requirements ... 11 
5 Test methods ... 12 
6 Inspection rules ... 14 
7 Packaging and storage ... 15 
Foreword
This Standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This Standard replaces GB/T 589-1993 Marine bronze flanged check valves.
Compared with GB/T 589-1993, the main technical modifications are as
follows.
- modified marking method;
- modified processing requirements.
This Standard was proposed by China Shipbuilding Industry Corporation.
This Standard shall be under the jurisdiction of National Technical Committee
on Marine Machinery of Standardization Administration of China (SAC/TC
137).
The drafting organizations of this Standard. Dalian Shipbuilding Heavy
Industry Group Co., Ltd., Dalian Golden Valve Co., Ltd.
Main drafters of this Standard. Li Jing, Liu Xiaopeng, Ma Yulong, Liu Jian,
Zhang Hezhi, Yu Changpeng.
Versions of standard substituted by this Standard are.
- GB 589-1965, GB 589-1976, GB 589-1984, GB/T 589-1993.
Marine bronze flanged check valve
1 Scope
This Standard specifies the classification and marking, requirements, test
methods, inspection rules, packaging and storage for marine bronzel 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,
seawater, lubricating oil, fuel and temperature does not exceed 250°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 1176-2013, Casting Copper and Copper Alloys
GB/T 1184-1996, Geometrical tolerancing--Geometrical tolerance for
features without individual tolerance indications
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
GB/T 3927, Direct-current potentiometers
CB/T 4196, Marine pipe flanges-connection dimensions and mating face
reference with furnace number. The shelf life shall not be less than 3 a.
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 of check valve shall comply with the requirements
of CB/T 3927; the wall thickness tolerance 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 H 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.
5 Test methods
5.1 Materials
The chemical composition and mechanical properties of castings shall be
carried out according to the method specified in GB/T 1176-2013. Other
materials shall be inspected by means of inspection material designation and
material quality certificate. The results shall meet requirements of 4.1.
5.2 Strength
The strength test method of check valve shall be carried out according to the
provisions of 4.12.3 in GB/T 600-2008. The results shall meet requirements of
4.3.
5.3 Sealability
The sealability test method for check valve plate and seat shall be carried out
according to the method specified in 4.13.3 of GB/T 600-2008. The results
shall meet requirements of 4.4.
5.4 Size and dimensional tolerance
5.4.1 The wall thickness tolerance of check valve shall be measured by
thickness gauge, caliper or ruler. The results shall meet requirements of 3.3
and 4.5.1.
5.4.2 The check valve size and linear dimension tolerance shall be
measured by corresponding level of measuring tool. The results shall meet
requirements of 3.3 and 4.5.2.
5.4.3 The structural length tolerance of check valve shall be measured by
steel ruler or vernier caliper. The results shall meet requirements of 3.3 and
4.5.3.
5.5 Geometric tolerance
The geometric tolerance of check valve shall be measured according to the
provisions of GB/T 1958. The results shall meet requirements of 4.6.
5.6 Appearance
Use visual inspection to check the check valve’s appearance. The results
shall meet requirements of 4.7.
5.7 Mass
Place the check valve on a weighing instrument of which the scale value is
not more than 0.01 kg. The results shall meet requirements of 4.8.
5.8 Mark
Use visual inspection to check the check valve’s mark. The results shall meet