What is spiral finish flange?

Recently,there is an order from Argentina.The customer requires the flange surface to be made separately by smooth finish and spiral finish. What is spiral finished & smooth finished flange?What’s the difference between it and common flange?

Flange face finish is the flange with grooves.For the flange with the same sealing surface,if there are grooves on the sealing surface,the sealing effect is better and the applicable pressure is higher.

EN 1092 Q235 FF flat flanges

There is no specific standard for face finish,and it is generally self-defined processing,mainly divided into three types: smooth finish,concentric circle and spiral finish.The density of spiral is more,and the thinness of concentric circle is more than that of sprial.If conditions permit,1-3 channels.Generally,the structure is: inverted right triangle (section form),which is 2mm wide and 1mm deep according to the requirements.

Its function is to form a labyrinth seal when the flange is connected,so as to reduce the leakage of gas or liquid.In addition,if the flange connection adopts non-metallic sealing gasket,the sealing face is generally processed;if the metal gasket is used,the face is not processed.

ANSI ASME B16.5 class 150 threaded flange

Haihao Group manufacture forged flanges in different dimensions,standards,specifications,our flanges contain weld neck flanges,slip on flanges,blind flanges,threaded flanges,lap joint flanges,long weld neck flanges,orifice flanges and so on.If you want to know more about our forged flanges,please email to us:sales@haihaogroup.com