Understanding DIN and ASME Flange Standards

Understanding DIN and ASME Flange Standards

Flanges are manufactured according to different international standards. Two of the most common are DIN and ASME.

DIN flanges are mainly used in Europe and many international industrial projects. Pressure ratings are identified by PN values such as PN10, PN16, and PN40.

ASME flanges are widely used in North America and many oil and gas projects. Pressure ratings are expressed as Class 150, Class 300, Class 600, and higher.

The main differences include:

• Dimensions
• Bolt hole patterns
• Pressure rating systems
• Applicable standards

Selecting the correct standard ensures compatibility with the entire piping system.

Professional China steel flange manufacturers usually supply both DIN and ASME standard products to meet global customer requirements.