Langfang DingYang

Introduction of Common Connection Ways and Production Requirements of Flanges

fittingflange | 26 October, 2018 13:49

Flange plays a very important role in pipeline construction, so there are many key points to master when using flange. Especially carbon steel flange manufacturers in the production of flanges, must meet the requirements of specifications, otherwise in the use of the process of some problems, resulting in some accidents, then the loss is more tragic. Flange connection is an important connection way in pipeline construction. Flange connection is easy to use and can withstand great pressure. Flange connections are widely used in industrial pipelines. In the family, the diameter of the pipe is small, and it is low pressure, so the flange connection is not visible. If in a boiler house or production site, there are flanged pipes and equipment everywhere. Flange geometry includes outer diameter, inner diameter and wall thickness. It is also required to control the radius of curvature. For example, if the radius is 1.5D, the radius of curvature must be within the required tolerance. Because most of these flanges are used for welding, in order to improve the quality of welding, the end of the car groove, leaving a certain angle, with a certain edge, this requirement is also more stringent, edge thickness, angle and deviation range are stipulated, geometric size than the flange many items. The surface quality and mechanical properties are basically the same as those of pipes. For welding convenience, the type of steel that is connected to the pipe is the same. All stainless steel flanges are surface treated, and the oxide scale on the inner and outer surfaces is sprayed off by shot peening, and then coated with anticorrosive paint. This is not only for export needs, but also for the convenience of domestic transport to prevent corrosion and oxidation, we must do this work. Packaging requirements for small flanges, such as exports, need to be made into wooden boxes, about 1 cubic metre, stipulating that the number of elbows in such boxes can not exceed about a ton, the standard allows a package, that is, a large set of small, but the total weight generally can not exceed 1 ton. For large parts, it is necessary to have a single package, like 24 ". Another is the packaging mark. The marking is to indicate the size, steel number, batch number and manufacturer's trademark. The alloy steel flanges should be stamped with a packing list and warranty. Flange surface treatment is also an important process, this step can be very good to prevent flange in the transport process of oxidation problems.

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