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Jiangsu Gabriel Alloy Technology Co.,Ltd

Address:North Ring Road 168, Xishan District, Wuxi City, Jiangsu Province, China

Tel:86-510-83795887

Fax:86-510-83795887

Email:export@gabriel-stainlesssteel.com


316L Stainless Steel Pipe Seven Advantages

1. Excellent weather resistance, prolonged use without aging, deterioration phenomenon, no cracks and peeling caused by aging phenomenon.

2. Excellent heat resistance, temperature 316L stainless steel pipe products can be used in the temperature range of -193 to 350 degrees Celsius, high temperature resistant products with a greater temperature range.

3. High pressure resistance, due to 316L stainless steel pipe body using high-quality stainless steel, diameter 10mm hose can withstand 20Mpa pressure; diameter 300mm hose can withstand 1Mpa pressure.

4. Long life, improved after the ring series of stainless steel pipe repeated bending fatigue life is more than 4 times the standard.

5. Quality and stability, the appropriate quality assurance and management system to establish, so that the quality of products stable and reliable.

6. Minimum bending radius, the same bending performance as the straight pipe, the minimum bending radius of the steel pipe assembly with the net.

7. Moderate price, high quality and stable material source, reasonable manufacturing system, the production price of moderate products.

310S stainless steel pipe with gas reaction

Hydrogenation may occur in ammonia synthesis, hydrodesulfurization and petroleum refining. Carbon steel is not suitable for high pressure hydrogen devices above 232 ° C. Hydrogen can diffuse into the steel and react at the grain boundary or in the pearlite zone and the iron carbide to produce methane. Methane (gas) can not diffuse out of the steel and gather together. The 310S stainless steel pipe produces white spots and cracks in the metal or one. In order to prevent the generation of methane, the cementite must be replaced with stable carbides, and chromium, vanadium, titanium or diamonds must be added to the steel. It is noted that increasing the chromium content allows higher temperatures and hydrogen pressures to be formed in these steels Chromium carbide, and 310S stainless steel pipe encountered hydrogen is stable. Chromium steel and austenitic stainless steels with a chromium content greater than 12% are resistant to corrosion in all known applications under harsh conditions of use (temperatures above 593 ° C).

Most metals and alloys at high temperatures do not react with molecular nitrogen, but atomic nitrogen reacts with many steel. And penetrates into the steel to form a brittle nitride surface layer. Iron, aluminum, titanium, chromium and other alloying elements may be involved in these reactions. The main source of atomic nitrogen is the decomposition of ammonia. Ammonia converter, ammonia plant production heater and in 371 ℃ ~ 593 ℃, an atmospheric pressure ~ 10.5Kg / mm2 nitriding furnace operation are ammonia decomposition. In these atmospheres, chromium carbide appears in the 310S stainless steel pipe. It may be corroded by atomic nitrogen to produce chromium nitride and release carbon and hydrogen to produce methane, as mentioned above, where it may produce white spots and cracks, or one of them. However, if the chromium content exceeds 12%, the carbides in these 310S stainless steel pipes are more stable than chromium nitride, so the previous reaction does not occur, so the stainless steel is now used in the hot environment of hot ammonia.

310S stainless steel pipe in the state of ammonia depends on the temperature, pressure, gas concentration and chromium nickel content. Field test results show that the corrosion rate of ferrite or martensitic stainless steel (altered metal depth or carburizing depth) is higher than that of austenitic stainless steel, the higher the nickel content is, the better the corrosion resistance. As the content increases, the corrosion rate increases.

310S stainless steel pipe in high temperature halogen vapor, corrosion is very serious, fluoride than the corrosion of chlorine greater role. For high Ni-Cr stainless steels, the upper limit of temperature is used in the drying gas, the fluorine is 249 ° C and the chlorine is 316 ° C.