GB/T 15185-2016Flanged iron and copper ball valves (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB/T 15185-1994, Cast Iron and Copper Alloy Ball Valves.

This Standard replaces the flanged ball valves part of GB/T 15185-1994; GB/T 8464-2008 replaces the threaded ball valves part of GB/T 15185-1994. Compared with GB/T 15185-1994, the major technical differences of this Standard are as follows.

-- it modifies the standard name (see cover and page 1; cover and page 1 of edition

1994);

-- it modifies the scope of nominal dimensions (Article 1; Article 1 of edition 1994);

-- it adds the correlation between pressure and temperature (see Article 1);

-- it modifies Figure 1 and Figure 2 (see Article 4; Article 4 of edition 1994);

-- it deletes the diagrams of the structures of ball valve body (5.2 of edition 1884);

-- it adds the measurement of valve body wall thickness (6.2.3);

-- it adds the mechanical property test (see 6.2.5);

-- it deletes the requirements for fire resistance (5.7 of edition 1994);

-- it deletes the requirements for cleanliness (5.8 of edition 1994).

1 Application Scope

This Standard specifies the structures, technical requirements, test methods, inspection rules and marking, packaging and storage of flanged iron and copper ball valves. This Standard applies to flanged iron and copper ball valves.

The parameters of applicable valves include. grey cast iron ball valves of nominal dimension DN50 ~ DN300, working temperature -10°C ~ 200°C and nominal pressure not greater than PN10; grey cast iron ball valves of working temperature -10°C ~ 100°C and nominal pressure not greater than PN16; spheroidal graphite cast iron ball valves of working temperature -10°C ~ 300°C and nominal pressure not greater than PN25; copper alloy ball valves of working temperature -40°C ~ 180°C and nominal pressure not greater than PN25.

The working media include water, non-corrosive liquid, gas and saturated steam and so on.

For ball valves of other connections, this Standard can also be used as reference.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this Standard.

GB/T 228.1, Metallic Materials - Tensile Testing - Part 1. Method for Test at Room Temperature

GB/T 12220, Industrial Valves - Marking

GB/T 12221, Metal Valves - Face to Face, End to End, Center to Face and Center to End Dimensions

GB/T 12223, Part-turn Valve Actuator Attachments

GB/T 12225, General Purpose Industrial Valves - Specification of Copper Alloy Castings

GB/T 12226, General Purpose Industrial Valve - Specification of Flake Graphite Iron Castings

GB/T 12227, General Purpose Industrial Valve - Specification of Spheroidal Graphite Iron Castings

GB/T 13927, Industrial Valves - Pressure Testing

GB/T 15530.1, Cast Copper Alloy Integral Flanges

GB/T 15530.8, Specifications for Copper Alloy and Composite Flanges

GB/T 17241.6, Integral Cast Iron Pipe Flanges

GB/T 17241.7, Specifications for Cast Iron Pipe Flanges

GB 26640, Specification for Minimal Thickness of the Shell of Valves

JB/T 5300, General Purpose Industrial Valves Material - Selection Guideline

JB/T 7928, Industrial Valves - Delivery Specification

3 Terms and Definitions

For the purposes of this document, the following terms and definitions apply.

4 Structures

The structures of ball valves can be classified into float ball valves and fixed ball valves.

The typical structures are as shown in Figure 1 and Figure 2.

6 Test Methods and Inspection Rules

6.1 If no other additional inspection requirements in the ordering contract, the inspection content of the purchaser is as follows.

a) inspection of valves during assembly using nondestructive test method;

b) examination of "manufacturing records", "heat treatment records" and so on; c) pressure test.