Stainless steel pipe bend
Process characteristics of stainless steel pipe bend
If the processing technology of stainless steel pipe is not handled properly, it is possible to relax and damage the metal structure. This kind of damage is a kind of fine grain boundary crack, which will affect the mechanical properties and service life of the tube to a certain extent.
The heating range of stainless steel pipe bend’s pipe is very small, and the temperature inside and outside the pipe wall is also different. Chromium is the most basic element of stainless steel stamping pipe bend. When the chromium content in stainless steel reaches a certain level, it will react with oxygen in the air to form a layer of dense oxide film. To prevent further corrosion of the steel matrix.
Protection and passivation of stainless steel pipe bend
Protection of stainless steel pipe bend
After the production of stainless steel pipe how to protect it? First of all, after the completion of the production of stainless steel pipe bend’s pipe, one hundred percent of the mouth of the seal, and the pipe bend should be light. Followed by the passivation of the stainless steel pipe bend, the surface of the need to use three anti canvas binding, in order to increase the intensity of protection. The third point is that because of the temporary support and the stainless steel pipe fittings body is made of stainless steel, if using pressure or bending tool, so it is necessary to protect the plate placed in contact with each other in the possible position of the stainless steel and protection, the protection board is mainly made of stainless steel plate or sheet made of.
Also note that when the transport of stainless steel materials, to put it in a closed box, an open box must use the canvas cover, and must have a plastic cover plug in two stainless steel pipe.
The last is to be placed in stainless steel pipe was not affected by impurities such as carbon steel, in the storage time to try to put in the drying room, and prevent moisture, salt water, dust and other contaminants in contact.
Passivation of stainless steel pipe bend
First of all, the operator must clear the structure of all pickling equipment and washing requirements, and the need to master the safe operation of the operating procedures, to prepare the necessary pickling tools. Secondly, the workers must wear good protective clothing, at least two operators, the environment must meet the requirements of pickling. Stainless steel pipe and pipe with pipe, can be used for on-site treatment in the passivation paste inside the shop, the main method is to use stainless steel pipe after welding after brush on weld clearance, and then use the brush of passivation paste evenly on the surface of stainless steel pipe to be treated, in about 20-30 minutes use a clean cloth to wipe off the passivation paste by washing with water, then, until the other position of weld and pipe as the light so far.
First aid measures for stainless steel bend
Sometimes there are some defects in stainless steel pipe bend pipe, but it will have a great negative impact on the quality of bent pipe fittings. The pipe wall thickness, reduce the ability to withstand internal pressure certainly enough, its performance for tube bending distortion; section shape, not only makes the cross-sectional area smaller, increasing flow resistance, have a certain impact on the fitting function effect will affect the pipe wall wrinkling; pipe strength the normal use of the bending pipe will also have certain influence. Therefore, in order to produce high quality pipe fittings, some measures should be taken to avoid the occurrence of the above defects before bending.
For the stainless steel bending pipe with small radius, the outer side of the arc is the characteristic of the bending process
Source: China pipe bend Manufacturer – Yaang Pipe Industry (www.ugsteelmill.com)