6C8.3 6CT engine parts Hexagon Head Screw 3907769

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6C8.3 6CT engine parts Hexagon Head Screw 3907769

First, the concept of flange
Flange flange is one of the common connection methods for connecting pipelines or equipment, which is widely used in petroleum, chemical, shipbuilding, construction and other industries. It is characterized by simple structure, convenient connection, high reliability, long service life and so on. The connection mode of flange is divided into butt welded flange, thread flange, sleeve flange, etc., of which butt welded flange is the most widely used.
2. Common flange standards
In order to meet the needs of different industries and different countries, there are more types of flange standards, the following mainly introduces ASME, JIS, EN and other common standards.
1. ASME flange standard
ASME flange standards are developed by the American Society of Mechanical Engineers and are divided into two series B16.5 and B16.47. The B16.5 series is suitable for pressure grades up to 2500LB and the B16.47 series is suitable for pressure grades up to 400LB. ASME flange standard specifies the parameters of flange thread, size, pressure and so on.
2. JIS flange standard
JIS flange standard is a Japanese industrial standard developed, divided into B2220 and B2291 two series. The B2220 series is suitable for pressure levels below 10K, and the B2291 series is suitable for pressure levels above 10K. The parameters such as thread, size and pressure of the flange are also specified in the JIS flange standard.
3. EN flange standard
The EN flange standard is developed by European standards and is suitable for engineering design within Europe. It is divided into EN1092, EN1759 and other series, and specifies the tightness of the flange and other parameters.
3. Relevant parameters such as size and pressure in the standard
Flange standards specify a number of relevant dimensions and pressure parameters, which have a decisive impact on engineering design and selection. Common parameters include flange diameter (DN), screw hole number (N), screw hole diameter (d), flange thickness (H), screw hole center distance (L), center aperture (d1), etc. In terms of pressure grades, ASME standards usually stipulate 250LB, 300LB, 600LB, 1500LB, 2500LB, etc., while JIS standards stipulate 5K, 10K, 16K, 20K, 30K, etc.
In short, flange standards include ASME, JIS, EN and other series, each series has specified the corresponding size and pressure and other parameters, for engineering design and selection has great reference value. If you need to know more about the flange standard, you can refer to the relevant standards or consult professional manufacturers.