Welding Of Flange Connection Flanges For Seamless Steel Pipes

The flange connection of a seamless steel pipe is considered in terms of straight flanges and welded flanges of the pipe fittings, and all work contents for pre-assembly and installation have been taken into consideration. If a flanged valve is installed in the pipe, only the installation cost of the valve is calculated, and the installation cost of the flange should not be repeated.

The quota does not include the number of main materials for fittings, flanges and bolts and shall be separately calculated according to the design provisions: galvanizing inside and outside the seamless steel pipes and fittings and off-site transportation costs shall be calculated separately.