steel tube

　　1. When other metals are attached to the surface of the stainless steel pipe , the chance of rust will be greater. 　　The rust caused by the adhesion of other metals on the stainless steel pipe-generally not serious, we can use a sponge or cloth to remove the rust on the stainless steel pipe with a neutral detergent, toothpaste or soapy water. 　　2. When there are many harmful substances in the exhaust gas, stainless steel pipes are also prone to cause rust. 　　For example, in factories or urban streets where there is a lot of traffic, there will be more harmful substances in the air, and the appearance of stainless steel pipes will be easily polluted. Stainless steel pipes that have been in this condition for a long time may have small rust spots. If the stainless steel pipe is lightly polluted, you can use the previous method. If it is more serious, you can use stainless steel rust remover to scrub it. It is particularly recommended to consult whether it needs to be replaced. ...

　　In recent years, zinc steel guardrails have been mentioned more and more times, and everyone has accepted this simple way of assembling guardrails. But when many people think of guardrails, most of the materials that they can think of are stainless steel materials, so who has the advantage compared with the two? 　　First: In terms of appearance, stainless steel is monotonous, and zinc steel guardrails can be sprayed with various colors that customers like. 　　Second: In terms of shape, stainless steel and iron art are both welded connections, and installation of magma solder joints is easy to break.Zinc steel is made by phosphating treatment and then spray-painted. It uses punching type, connection accessories and screw connections throughout the process. When installing, you only need to cut the material according to the size and connect the accessories. 　　Third: In terms of service life, iron art generally falls off in 3-5 years. Zinc steel is usually treated for about 10 year...

　　According to GB / T3092 "Welded steel pipes for low-pressure fluid transport", the nominal diameter of the welded pipe is 6 ~ 150mm, the nominal wall thickness is 2.0 ~ 6.0mm, and the length of the welded pipe is usually 4 ~ 10 meters. The ruler length is shipped from the factory. 　　The surface quality of erw steel pipe should be smooth, and no defects such as folding, cracking, delamination, and overlap welding are allowed. 　　On the surface of erw steel pipe, minor defects such as scoring, scratches, weld misalignment, burns, and scarring that do not exceed negative wall thickness deviations are allowed. Wall thicknesses at the welds and weld bead in the seams are allowed.

　　Cold drawn precision seamless steel pipe has the characteristics of no oxide layer on the inner and outer walls, high pressure without leakage, high precision, high smoothness, no deformation during cold bending, no flaring and no cracks, and antirust treatment on the surface. It is mainly used for mechanical structures. , Hydraulic equipment and pneumatic or hydraulic components of automobiles and motorcycles, such as air cylinders or oil cylinders. 　　The basic production process of cold drawn precision seamless steel pipe is: 　　Hot rolled capillaries—> capillary tube inspection and dressing—> capillary acid pickling—> capillary acid pickling re-inspection—> cold drawing—> straightening before finishing drawing—> acid washing and lubrication—> finishing—> before finished product Processing —> storage. 　　Production needs attention to control: 　　1. Capillary 　　The capillary wall thickness should be uniform, and the internal and external surface def...

　　Based on experience, we describe several common rust conditions of stainless steel pipes as follows: 　　First, stainless steel has peeling trachoma and other rust. Substandard materials will cause rust. 　　Second, the annealed stainless steel strip becomes black, and the ammonia leak from the perforation of the furnace tube will cause rust. 　　Third, the welding seam of the stainless steel control pipe factory is rough, and the black line will cause rust. 　　Fourth, do not pay attention to the protection of stainless steel pipes during transportation, mix stainless steel pipes with chemical products that can pollute and corrode, or rainy transportation to allow two waters to penetrate into the packaging film will cause rust. 　　Fifth, when the processing manufacturer cuts stainless steel or iron when installing and manufacturing the product, splashing iron filings on the surface of the stainless steel pipe may cause rust. 　　Sixth, the use of users in highly pollu...