What is the standard of flange coefficient for FRP ducts?
Negotiations did not consider, people reported flange you have to consider, 15% below have been used to see your negotiating skills, there is no standard specification! The above said I have used, and now I generally talk about n yuan / square meter, including the wind pipe, pipe fittings, flanges and valve components to connect the flange are included in
That quota said: glass steel duct, pipe fittings, flange and reinforcing frame are in accordance with the finished preparation, only the wind pipe and the valve flange connection, before the implementation of the equipment support within the 20kg section, multiplied by the coefficient 1.4. Glass fiber reinforced plastic wind pipe is finished product: when it is made, there are moulds. According to the design of the drawing, the mould is made. The flange and the air duct are one! Remove the mold and install the hole on the flange! In general negotiations with the manufacturers directly n yuan / square meter (production, installation), whether it involves the number of flanges, such as included, there is no need to re count, direct calculation of the inner diameter of the air duct is the expansion area!
Can be explained in this way, the flange width is generally 50, on both sides that is 100, flange thickness is calculated as two times the thickness of the pipe, or 200. The duct length is 2000 knots, and 200 is 2000 of the 10%
