Transition joint reference standard

In the industrial and construction fields, transition joints are a very important connection method. It can connect pipes or fittings of different materials, diameters, shapes, and thicknesses. During use, the transition joint not only needs to have excellent sealing performance and corrosion resistance, but also needs to comply with corresponding standards to ensure its safety and stability during operation.

At present, there are various transition joint standards both domestically and internationally, among which the more common include American standards, European standards, Japanese standards, and Chinese national standards. In this article, we will provide a detailed introduction to these standards to help readers better understand the standards and specifications of transition joints.

1、 American standard transition joint standard

The American National Standards Institute (ANSI) is the national standardization organization of the United States. In the United States, the standard for transition joints usually uses ANSI standards, with common ones such as ANSI B16.5, ANSI B16.9, and ANSI B16.11. These standards cover various types of transition joints such as pipe fittings, flanges, elbows, and tees. Among them, the ANSI B16.5 standard specifies the size, pressure rating, and number and size of bolt holes for pipe flanges; The ANSI B16.9 standard specifies the dimensions and manufacturing processes of seamless and welded pipe fittings; The ANSI B16.11 standard specifies the dimensions and manufacturing process of threaded fittings made of forged steel.

Transition joint

2、 European standard transition joint standard

The European Organization for Standardization (CEN) is the standardization organization in Europe. In Europe, EN standards are commonly used for transition joints, among which common ones are EN 1092-1, EN 10253-1, EN 10253-2, etc. These standards cover various types of transition joints such as flanges, fittings, elbows, and tees. Among them, the EN 1092-1 standard specifies the dimensions and pressure ratings of steel and cast iron flanges; The EN 10253-1 standard specifies the dimensions and manufacturing processes of seamless and welded pipe fittings; The EN 10253-2 standard specifies the dimensions and manufacturing process of welded elbows and tees.

3、 Japanese standard transition joint standard

The Japan Industrial Standardization Organization (JIS) is the national standardization organization in Japan. In Japan, the standard for transition joints usually uses JIS standards, among which the more common ones are JIS B2220, JIS B2311, JIS B2312, etc. These standards cover various types of transition joints such as flanges, fittings, elbows, and tees. Among them, JIS B2220 standard specifies the size and pressure rating of steel and cast iron flanges; The JIS B2311 standard specifies the dimensions and manufacturing process of seamless steel welded pipe fittings; The JIS B2312 standard specifies the dimensions and manufacturing process of steel welded elbows and tees.

4、 Chinese National Standard Transition Joint Standard

The Chinese national standard is a standard formulated by the China Organization for Standardization (SAC). In China, the standard for transition joints usually uses GB/T standards, among which common ones include GB/T 9112, GB/T 12459, GB/T 13401, etc