Technical data

01

Nominal size	DN15 – DN2000
Pressure rating	PN6 – PN100
Standard	DIN · JIS · ANSI
Connection type	Slip-on
Design	EN 1092-1EN 1092-1Flanges — steel flanges, PN designated DIN 2501DIN 2501Flange connection dimensions (former DIN series; superseded by EN 1092) ISO 7005-1ISO 7005-1Metallic flanges — steel flanges
End connection standard	EN 1092-1EN 1092-1Flanges — steel flanges, PN designated DIN 2501DIN 2501Flange connection dimensions (former DIN series; superseded by EN 1092) ISO 7005-1ISO 7005-1Metallic flanges — steel flanges

The standards listed apply to stocked products. Contact us for other standards.

Material

02

Material	SS316SS304Rg5St37A105

Features

03

Considerations

Choose the material and type to suit the application.
The gasket must match the flange facing (flat face, raised face, ring joint, etc.).
Tighten bolts evenly during installation; overstressing can cause cracks.
Take protective measures against corrosion and vibration.

Main functions of flanges

Securely connect pipes, valves, pumps and equipment.
Prevent leaks when used with gaskets or seals.
Make maintenance and replacement easy.
Provide durable joints under high pressure, temperature and chemical exposure.

Materials

Carbon steel (St37, ASTM A105): the most common choice for general-purpose piping.
Stainless steel (AISI 304, AISI 316): high corrosion resistance; ideal for food, pharmaceutical and chemical plants.
Cast iron (GG25, GGG40.3): low cost; used in water and steam lines.
Bronze & copper alloys (Rg5, CuSn10): suitable for seawater and special chemical environments.

Standards and dimension systems

Manufactured to international standards such as DIN, ANSI, BS and JIS.
Pressure ratings usually range from PN 10 to PN 100 or from Class 150 to Class 2500.
Dimensions, number of bolt holes and facing are defined by these standards.

Flange type	Characteristics	Applications
Slip-on	Slipped over the pipe and welded in place.	Water and HVAC installations
Weld neck	Strong joint at high pressure/temperature.	Petrochemicals, power plants
Threaded flange	Connects without welding.	Small-diameter gas or water lines
Blind flange	Closes off the end of a pipe.	Line termination or test lines

Accessories

04

Compressed fibre gasket

Compressed fibre gaskets are asbestos-free seals made of mineral fibres pressed with special binders. They withstand high temperatures (typically up to 300 °C) and pressures (PN10–PN40) and are widely used in water, steam, gas, mild chemical and oil systems.