Fire piping includes two systems: fire hydrant system and water sprinkler system. As far as the editor of Zhongxing Yide knows, the stainless steel fire protection piping system is a widely used fixed fire protection facility in China. Nowadays, 304 stainless steel pipes are used in fire water supply pipes in sprinkler systems. As we all know, the service life of stainless steel pipes is relatively long, which can reach 100 years, and the shortest is at least 70 years, which is as long as the life of the building. Furthermore, the most outstanding corrosion resistance among many pipes is stainless steel pipes, because stainless steel will passivate with oxidants, forming a protective film on the surface of stainless steel, which can prevent further oxidation reactions from occurring. In addition, stainless steel can be recycled without causing environmental pollution, so stainless steel waste also has great economic value. The tensile strength of 304 stainless steel pipes is very high, 2 times that of steel pipes and 8 to 10 times that of plastic pipes. It also has good ductility and toughness, so 304 stainless steel pipes can withstand vibration, impact, thermal expansion and contraction well. It does not leak, does...
With the rapid development of our country’s economy, especially with the steady development of China’s industrialization process, my country’s antibacterial stainless steel pipe industry has gradually entered a mature stage. Antibacterial stainless steel pipe is a versatile stainless steel that is widely used in manufacturing products that require good comprehensive The demand for equipment and parts with excellent performance (corrosion resistance and formability) is increasing day by day. Below we will introduce to you in detail the commonly used 304 antibacterial stainless steel pipes. There are many types of antibacterial stainless steel pipes, but the main uses are as follows: Classification of antibacterial stainless steel pipes 1. Classification according to production method: (1) Seamless tubes – cold drawn tubes, extruded tubes, cold rolled tubes; (2) Welded pipe; (3) Classification by process – gas shielded welded pipe, arc welded pipe, resistance welded pipe (high frequency, low frequency); (4) According to the welding seam – straight seam welded pipe, spiral welded pipe. 2. Classification according to cross-sectional shape: (1) Round steel pipe; (2) Rectangular tube. 3. Classification by wall thickness – thin-walled steel pipes, thick-walled steel pipes 4. Classification by use: (1) Civilian pipes are divided into round pipes, rectangular pipes, and...
Precision antibacterial stainless steel pipe is a kind of pipe fitting that has higher quality requirements than conventional pipe fittings. This high-quality requirement is mainly reflected in dimensional accuracy, pipe orifice roundness, pressure resistance, etc. This type of pipe is classified by pipe wall thickness, pipe orifice size, pipe cross-sectional shape and material, and the type of pipe directly affects use. 1. Pipe wall thickness According to the wall thickness, it can be divided into thin-walled pipes and thick-walled pipes. The ratio of wall thickness to outer diameter of thin-walled pipes is less than 6%. The thinner the pipe wall, the better the heat dissipation performance. It can generally be used as a heat exchange pipe. The inner pipe wall It is required to be smooth and not easy to scale; suitable for central air conditioners, boilers, refrigerators, etc. The ratio of wall thickness to outer diameter of thick-walled stainless steel pipes is greater than or equal to 6%, and the welds must be completely penetrated. They have good pressure resistance, mechanical properties, abrasion resistance, etc., and can be used for textile equipment, electroplating Equipment, parts and components of dyeing equipment. 2. Nozzle size According to the size of...
Stainless steel – spring steel 301L-LT Mechanical properties: The suitable cold working method has low strength, good flatness and large elongation after rolling. Applicable welding methods: arc welding heating has no effect on its mechanical properties, so both spot welding and arc welding can be applied. Applicable cold processing methods: stamping, stretch bending and bending processing of parts with low strength requirements 301L-DLT Mechanical properties: low strength, secondary rolling rate is controlled within the range of 3% to 8%, small residual stress, small creep at room temperature, and good surface flatness can be maintained. Applicable welding methods: Arc welding heating does not have much impact on its mechanical properties, so spot welding and arc welding are both acceptable. Cold working methods used: bending and drawing of parts with lower strength, especially those that do not use a flattening machine for rolling. 301L-ST Mechanical properties: Moderate strength, secondary rolling rate is controlled within the range of 6% ~ 12%, and the surface flatness after rolling is good. Applicable welding methods: The strength of the material does not decrease significantly after heating, so spot welding is the main method, and electromagnetic welding can be used. Applicable cold working methods: Suitable for stretch...
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