Carbon steel A105N welding flange appearance why will have black skin and connection quality requirements
Carbon steel A105N welding flange appearance appears in black skin, usually when welding flange, especially non-standard welding flange, so the appearance of non-standard welding flange often has black skin, so how to explain such welding flange? The general Carbon steel A105N welding flange appearance of black skin is usually caused by two ways, The Carbon steel A105N welding flange is particularly thin, When processing by the welding flange manufacturer, So it is difficult for welding flange manufacturers to process the desired thickness, So the second kind of black skin is the black appearance of the Carbon steel A105N welding flange, which is the surface welding flange, when the manufacturer processes the welding flange, The appearance of the welded flange is particularly hard, So the appearance of this Carbon steel A105N welding flange is black. The selection of Carbon steel A105N welding flanges must meet the design requirements. When the design has no requirements, the appropriate forms and specifications should be comprehensively selected according to the working pressure, working temperature, working medium and the material number of the flange. Welding flange must be inspected before installation, the surface should be smooth, no sand holes, cracks, spots, burrs and other defects that reduce the strength of the flange, and there should be no penetrating sealing scratches on the sealing surface. When Carbon steel A105N welding flange and pipe assembly, apply the flange ruler to check the flange. When the parallel deviation size design of flange connection is not specified, it shall not be greater than 1.5% of the outer diameter of Carbon steel A105N welding flange, and not more than 2mm. When two flanges are not parallel and exceed the specified requirements, it must be rectified, and shall not be corrected with multiple spacers. Carbon steel A105N welding flange shall be welded on both sides according to the standard, and the foot height shall meet the requirements.
