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American Standard » Class 150 Flanges
DIMENSIONS OF CLASS 150 FLANGES (ANSI B 16.5) (in mm)
Note: Thickness ‘C’ is exclusive of Raised Face Thickness of 6.25 MM. For Class 900
A class 150 flange can be created from various materials like stainless steel, carbon steel, ductile iron, cast iron, etc and is resistant to abrasion & corrosion with high durability. Flanges such as American standard flanges, British standard flanges and German standard flanges created using above mentioned materials have separate pressure ratings.
The pressure rating of flanges depends on various factors which we will look at in the following section.
Flanges are able to resist different pressure values at different & varied temperatures. With increase in temperature pressure rating of a flange decreases. Let us take an example to illustrate what happens; Class 150 flanges rates to about 270 PSIG (in ambient conditions), at 400 F a PSIG of 180, at 600 F a PSIG of 150 & 75 PSIG at 800 F. So it all depends on the fluid’s operating temperature.
Different types of Class 150 Flanges:
- Welding neck flanges
- Slip on flanges
- Blind flanges
- Threaded flanges
- Lap joint flanges
- Socket weld flanges
American Standard » Class 300 Flanges
DIMENSIONS OF CLASS 300 FLANGES (ANSI B 16.5) (in mm)
Note: Thickness ‘C’ is inclusive of Raised Face Thickness of 1.65 MM. For Class 300
• Welding Neck Flanges
• Slip on Flanges
• Blind Flanges
• Threaded Flanges
• Lap Joint Flanges
• Socket Weld Flanges
American Standard » Class 600 Flanges
DIMENSIONS OF CLASS 600 FLANGES (ANSI B 16.5) (in mm)
Note : Thickness ‘C’ is exclusive of Raised Face Thickness of 6.25 MM. For Class 600
American Standard » Class 900 Flanges
DIMENSIONS OF CLASS 900 FLANGES (ANSI B 16.5) (in mm)
Note: Thickness ‘C’ is exclusive of Raised Face Thickness of 6.25 MM. For Class 900
American Standard » Class 1500 Flanges
DIMENSIONS OF CLASS 1500 FLANGES (ANSI B 16.5) (in mm)
Note: Thickness ‘C’ is exclusive of Raised Face Thickness of 6.25 MM. For Class 900
DIMENSIONS OF CLASS 2500 FLANGES (ANSI B 16.5) (in mm)
DIMENSIONS OF CLASS 2500 FLANGES (ANSI B 16.5) (in mm)
Note: Thickness ‘C’ is exclusive of Raised Face Thickness of 6.25 MM. For Class 2500
American Standard » Schedule of Weldneck Flanges & Weights
ANSI FLANGES WEIGHT (KGS)
Weldneck flanges
Weldneck flanges have drilled wall thickness which is of equally same dimension existing for matching pipe. Bore will be larger if the pipe is lighter and opposite will be true if pipe is heavier and the bore will be small.
Erosion as well as turbulence is significantly reduced in pipeline as bores of flange & pipe match. Due to these reasons weldneck flanges are chosen for critical applications where high pressure and hot-cold temperatures are prevalent. The different kinds of weldneck flanges available are:
• Weld neck flanges – raised face
• Weld neck flanges – flat face
American Standard » Tolarence of Flanges
DIMENSIONS TOLERANCES OF FLANGES (in mm)
