GB/T 13295-2013 in English

《GB/T 13295-2013水及燃气用球墨铸铁管、管件和附件》由TC183（全国钢标准化技术委员会）归口，主管部门为中国钢铁工业协会。
本标准规定了经任何类型铸造工艺加工或由铸铁部件装配而成的水及燃气用球墨铸铁管、管件、附件及其接口的术语和定义、技术要求、试验方法、尺寸和公差、检验规则与质量证明书等,也给出了接口部件的型式试验要求。
本标准适用于包含有承口、法兰和插口,一般以内部和外部涂覆的状态交货的管、管件及附件,接口尺寸范围从公称直径DN40~DN2600,流体温度为0℃~50℃。
―――用于各种用途(饮用水、消防用水、造雪用水、灌溉用水、水电站用水等)不同类型水(例如:原水、处理过的水、回用水等)的输送;
―――有压或无压输送;
―――地下或地上铺设;
―――设计压力为中压A 级及以下级别的燃气(如人工煤气、天然气、液化石油气等)输送。
本标准不适用于冰点以下的温度(这并不排除产品用于较高温度)流体,不用于受到消防规范影响的区域。
管和管件依据壁厚等级系数K或允许工作压力C进行分级。

This standard specifies the terms and definitions, technical requirements, test methods, dimensions and tolerances, inspection rules and quality certificate of ductile iron pipes, fittings and accessories for water or gas applications cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints; it also specifies the type test requirements for joint components.
This standard is applicable to pipes, fittings and accessories which are manufactured with socketed, flanged or spigot ends and normally delivered internally and externally coated. The range of joint dimension is nominal size DN40~DN2600, and the fluid temperature is 0~50℃.
- To convey water of different types (raw water, treated water and recycle water) and for various purposes (potable water, fire water, snow-making water, irrigation water and hydropower station water);
- Operated with or without pressure;
- Installed below or above ground;
- To convey gas with design pressure of Grade A medium pressure and below (e.g. manufactured gas, natural gas and liquefied petroleum gas).
This standard is not applicable to the fluid under subfreezing temperature (relatively high temperature application of the product is not excluded) and the area under the effect of fire regulation.
Pipes and fittings are classified according to the wall thickness grade coefficient K or the allowable operating pressure C.
Note: in this standard, all pressures are relative pressures expressed in MPa.

Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements
5 Leaktightness Requirements
6 Test Methods
7 Type test
8 Inspection Rules and Quality Certificate
9 Tables of Dimensions
Appendix A (Informative) Comparison of Chapter and Article Numbers Between This Standard and ISO 2531:2009 (E)
Appendix B (Informative) Technical Differences Between This Standard and ISO 2531:2009 (E) and Their Reasons
Appendix C (Informative) The Dimension of Grade C Pipe as well as PN and Maximum DN for Flanged Joint Pipes and Fittings with Flange
Appendix D (Informative) Allowable Pressure
Appendix E (Informative) Wall Thickness, Diametral Stiffness and Diametral Deflection of Pipe
Appendix F (Informative) External Corrosion Protection
Appendix G (Informative) Internal Corrosion Protection
Appendix H (Informative) Safety Factors
Appendix I (Informative) Quality Assurance
Appendix J (Informative) Condenser Cylinder