Welding Flange

Welded flanges

Parts where tubes are connected to each other

The welded flange is the part where the pipe is connected to each other and is connected to the pipe end. There are holes on the welded flange, and the bolts make the two flanges tightly connected. Sealed with intermittent gaskets. A welded flange is a disc-shaped part that is most commonly found in plumbing.

A welded flange connection is the fixing of two pipes, fittings or equipment on a weld. Between the two welds, a flange pad is added, which is fastened together with bolts to complete the connection. Welding is an important connection method for high-pressure pipeline construction. The welded flange connection is easy to use and can withstand large pressures. Welding flanges are widely used in petroleum, chemical, natural gas, power stations, metallurgical pipelines and other fields.

Standard system for welded flanges

There are two main systems of international pipe flange standards, namely the European pipe flange system represented by the German DIN (including the former Soviet Union) and the American pipe flange system represented by the American ANSI pipe flange. In addition to this, there are Japanese JIS pipe flanges, but they are generally only used for public works in petrochemical plants and have little international influence. The flanges of various countries are briefly introduced as follows:

(1) The European system represented by Germany and the former Soviet Union is a flange

(2) The American system pipe flange standard, represented by ANSI B16.5 and ANSI B 16.47

(3) British and French pipe flange standards, each country has two sets of pipe flange standards.

To sum up, the international pipe flange standards can be summarized into two different and non-interchangeable pipe flange systems: one is the European pipe flange system represented by Germany, and the other is the American pipe flange system represented by the United States.

IOS7005-1 is a standard issued by the International Organization for Standardization in 1992, which is actually a pipe flange standard that combines two series of pipe flanges from the United States and Germany.