Sanitary stainless steel pipe use scenario is rich, food, beverage, alcohol, bioengineering and other production equipment and production lines are widely used in the field, in addition, The quality standards of stainless steel sanitary pipe products must meet the main indicators requirements of the state (B/T17219-2001 "Safety Evaluation Standards for Drinking Water transmission and distribution water Equipment" and CJ/T151-201 "Thin-walled stainless Steel water pipes". Water pipe main materials and pipe fittings need to be made of high-quality 304 stainless steel materials to ensure that the use of pipes in the process of health, non-toxic, pollution-free effect. Therefore, the quality standard requirements of sanitary stainless steel pipes are also very high, and by no means can be met by ordinary decorative pipe production processes.
In the process of producing stainless steel sanitary pipes, what should we pay attention to?
1. Adopt high protective gas protection
When welding sanitary stainless steel pipe, the chromium and nickel on the surface of the stainless steel are easy to oxidize, resulting in a decrease in the quality of the welded pipe, so we should use argon arc welding and plasma welding and other welding modes with gas protection in the production process, to maximize the retention of the original characteristics and corrosion resistance of stainless steel.
After the sanitary stainless steel pipe is formed and welded, it must be treated with a solid solution of 1050 degrees to eliminate the internal stress caused by the deformation of the sanitary stainless steel pipe, reduce stress corrosion, restore the intercrystalline changes in the welding process of the stainless steel pipe, and also make the carbide in the welding heat sensitive zone dissolve in dry austenite to prevent adverse effects on the performance of the impregnable steel pipe.
The pickling passivation process can make the sanitary stainless steel pipe and the inner and outer walls produce a thin, dense and hard passivation layer, which can isolate the influence of the external environment on the pipe during the use of the pipe, so the passivation layer process has brought an important guarantee for the corrosion protection of the sanitary stainless steel pipe.
What are the advantages of stainless steel sanitary pipes?
1. meet the health requirements, sanitary grade stainless steel is the most safe and sanitary water pipe material, thin-walled stainless steel water pipes will not cause secondary pollution to water quality, to meet the needs of the national direct drinking water quality standards.
2. The replacement of water pipes and fittings caused by water system maintenance will not produce waste that is difficult to dispose of.
3. The performance strength of stainless steel sanitary pipe is very high, which greatly reduces the probability of water leakage caused by external influence of water pipe, saving water resources and the possibility of maintenance.
4. Stainless steel pipes can withstand high-speed water erosion of up to 30 meters/second, and the thin and dense chromium-rich oxide film on the surface of stainless steel makes stainless steel pipes have good corrosion resistance in all water quality, including soft water.
Every time the finishing tube is rolled, it must go through the process of solution treatment. Ta ensure that the performance of the steel pipe meets the technical requirements. and to provide guarantee for the post-process processing or use. Bright solution treatment process of ultra-long seamless steel pipe has always been a difficulty in the industry.
Traditional electric furnace equipment is large,covers a large area, has high energy consumption and large gas consumption, so it is difficult for realize bright solution process. After years of hard work and innovative development, the use of current advanced induction heating technology and DSP power supply. Precision control of heating temperature to ensure that the temperature is controlled within t2C,to solve the technical problem of inaccurate induction heating temperature control. The heated steel pipe is cooled by "heat conduction"in a special closed cooling tunnel, which greatly reduces the gas consumption and is more environmentally friendly.
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