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The flange should be checked on time
Flange connection refers to the two pipes, fittings or equipment, first of all fixed on a flange, between the two flanges, plus the pad, with bolts to fasten together to complete the connection. Some pipe products and equipment have their own flanges, also belong to the flange connection. Flanges are divided into threaded flanges and welded flanges, which are a kind of disc-shaped parts, which are the most common in piping works. Flanges are used in pairs. In the pipeline project in progress, the flange is mainly used for pipe connections. In the need to connect the pipeline, a variety of installation of a flange, low pressure pipe can use the wire flange, 4 kg above the pressure of the use of welding flange. Low-pressure small diameter with wire flange, high pressure and low pressure large diameter are used welding flange, different pressure flange thickness and the diameter and number of connecting bolts are different. Flange pieces are not corrosive, pitting, corroded or worn, and are one of the finest materials in building metal materials. Because stainless steel has good corrosion resistance, it allows the structural parts to permanently maintain the integrity of the engineering design.
Flange can not be stored for a long time, should be checked regularly, often on the exposed surface to be clean, remove dirt, cleanly stored in the indoor dry place, is strictly prohibited or open storage. Flange ball valve, globe valve, gate valve when used only for full open or closed, do not agree to do with the regulation of flow, so as to avoid the erosion of the sealing surface to accelerate wear. Flange easy to draw, easy to manufacture, low cost, widely used; but the rigidity is poor, it shall not be used for supply and demand, flammable, explosive and high vacuum requirements of the chemical process piping system and height, extreme hazards. Sealing surface type has a plane and auricle. Flange structure is simple, small size, light weight; close and reliable, the current ball valve sealing surface materials widely used plastic, good sealing, in the vacuum system has also been widely used; easy maintenance, ball valve structure is simple, the seals are generally activities Of the demolition and replacement are more convenient; in full or closed, the ball and the sealing surface of the valve seat and the media isolation.
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