，这篇文章介绍 Stop Valves Standard（一）
Stop Valves Standard (One)
Stop valves can provide a much better method to shut off the flow of a fluid or gas than other devices such as globe or gate valves. When closed properly, a stop valve can definitely prevent the passage of fluids through a pipe. In this article, we will discuss the common stop valves standards.
First, the American National Standards Institute (ANSI) is the best-known standards body in the US. A standard issued by the organization usually covers the dimensions, materials and pressure ratings of the valve. ANSI standards are broken down into three categories: classes, component categories, and materials. Each class covers a particular type of valve such as stop valves, gate valves, globe valves, or butterfly valves. Component categories specify the design of the valve, including its body design, seat, stem, and seals. Material categories describe the materials used in the valve construction.
The Association for Standardization of Automation and Measuring Systems (ASME) is another important standards organization. It issues standards which describe the construction and quality characteristics of various types of valves. ASME standards also include safety requirements for valves.
Finally, the British Standards Institute (BSI) is the UK-based standards organization. It issues standards defining the various components of valves, the performance characteristics, and the requirements for testing. BSI standards also include requirements for certification and marking of valves.
In conclusion, stop valves are an effective way to shut off a fluid or gas flow, and using these valves in accordance with standards helps ensure their safe, reliable operation. Standards issued by the ANSI, ASME, and BSI define the dimensions, materials, safety requirements and testing requirements of stop valves, so designers, engineers and purchasers can be confident that their stop valves meet their needs and conform to the applicable standards.
