The characteristics and application of sanitary manhole
1, atmospheric pressure hole is mainly used in pharmaceutical, beverage, food, cosmetics, fine chemicals and other industrial pressure vessels, such as fermentation tanks,sanitary ball valves.
2, health-level manhole is open-type manhole cover;
3, plastic hand wheel and stainless steel hand wheel customized according to customer needs;
4, the inner surface: Ra0.8um-0.5um;
5, the outer surface polishing, matte treatment, sandblasting (according to customer demand);
6, the pressure can be based on customer requirements;
7, gaskets: EPDM / NBR / SILICON.EPM meet FDA117.1600;
8, material 304, 304L, 316,316 L can produce non-standard products to map processing, atmospheric pressure relief valve manhole cover: 2mm, cylinder is 3mm, height is 95mm, weight is 6.6kg.
Three Major Characteristics of Sanitary Fittings
Sanitary fittings are very popular in life as well. Sanitary pipe fittings can be broadly divided into sanitary-grade pipe fittings, sanitary-grade welded pipe fittings and socket-type sanitary pipe fittings and other three categories, although we may have a little understanding of sanitary pipe fittings, but may not understand its characteristics.
Three major characteristics of Sanitary pipe fittings
1, corrosion resistance
Many stainless steel sanitary fittings in food corrosion resistance are very good, such as one, two types of tableware, kitchen utensils, water heaters, drinking fountains, etc., there are many foreign businessmen for sanitary pipe corrosion resistance also tested: NACL solution heated to boiling, drained solution for a period of time, suction clean drying, said weight loss, to determine the degree of corrosion.
Sanitary pipe fittings have different uses, the welding performance is also different. Some tableware on the welding performance does not require, including some pot enterprises. But the vast majority of production needs of raw materials, welding performance, such as the second category tableware, insulation Cup, pipe, water heaters, drinking fountains and so on.
3, polishing performance (BQ)
Sanitary pipe fittings polishing performance (BQ), at present, the stainless steel sanitary pipe fittings were polished in many industries, only a small number of products such as water heaters, drinking fountains, etc. do not need polishing. The raw material requirements are very important.
Factors affecting the polishing performance of sanitary pipe fittings:
① raw surface defects. Such as scratches, pitting, acid pickling.
② sanitary valves material quality problems. Hardness is too low, polishing is not easy to throw bright (BQ is not good), and hardness is too low, in the deep drawing surface prone to orange peel phenomenon, thus affecting the BQ. BQ hardness is relatively high.
③ After deep drawing products, the deformation of the surface area will be a great little black spots and RIDGING, thus affecting the BQ.
Stainless steel sanitary fittings need to be washed twice a year
As with other materials exposed to the atmosphere, stainless steel sanitary fittings are also dirty. The following sections analyze the design factors that impact maintenance and cleaning costs. However, there is a correlation between rain erosion, manual flushing, and dirty surfaces. Hygienic stainless steel fittings determine the effect of rain erosion by placing the same slab directly in the atmosphere and in a shed.
The effect of manual flushing was determined by manually scrubbing the right side of each panel with soapy water sponge every six months. As a result, it was found that dust and silt removal by rain washing and manual scrubbing had a favorable effect on the surface condition as compared with a slat placed in a shed and a place not washed. But also found that the status of surface processing has an impact on the smooth surface of the slab than the rough surface of the slab effect is better.
So the scrubbing interval has a variety of factors, the main influencing factor is the required aesthetic standards. Although many stainless steel sanitary fittings are only rinsed during the cleaning of the glass, in general, stainless steel sanitary fittings for external use are scrubbed twice a year.
Stainless steel seamless sanitary fittings and stainless steel welded sanitary pipe.
What are the differences?
Stainless steel welded sanitary pipe and welded steel pipe is mainly different forming process. General welded steel pipes such as tap water, usually by bending the plate after welding together, you can find a weld in the above; diameter is generally spiral weld. The seamless steel pipe is generally molten state of the molten steel through the annular slit back out by the tensile and other processing technology molding, so there is no weld. In terms of performance, especially pressure on the ability of welded steel pipe has greatly improved, it is often used for high-voltage equipment. Such as hydraulic equipment, piping connections. The welding seam of welded steel pipe is the weak link, and the quality of weld is also the main factor affecting its overall performance. Stainless steel welding health pipe in the north had lived in general have had water pipes or heating pipes in the winter was frozen explosion experience, explosive place are generally weld.
Protection Measures 316L Sanitary Fittings
316L sanitary pipe fittings have been favored by the water supply equipment industry, single-layer, multi-storey, skyscrapers, factories, warehouses, waiting rooms, waiting rooms are widely used steel. 316L sanitary pipe fittings is a non-burning building materials, it has seismic, bending and other characteristics. In practice, the steel can not only increase the load capacity of buildings, but also to meet the aesthetic needs of architectural design aesthetic, but also to avoid the concrete and other building materials can not bend, stretch defects.
However, the steel as a building material in the fire, there are some unavoidable defects, its mechanical properties, such as the yield point, tensile and elastic modulus, etc. will be due to the temperature rise sharply. 316L sanitary pipe fittings in the 450 ~ 650 ℃ temperature will lose the carrying capacity, great deformation, resulting in steel columns, steel beam bending, the result of deformation is too large can not continue to use, generally without protection of the steel structure Fire resistance is about 15 minutes. The length of this time also depends on the rate at which the component absorbs heat.
In order to make the steel structure material overcoming the fireproof insufficiency in the practical application, must carry on the fire prevention processing, its purpose is to enhance the fireproof limit of the steel structure to the design specification stipulation limit scope. To prevent the 316L health-class pipe rapid fire temperature deformation deformation collapse, the measures are varied, the key is to take different methods according to different situations, such as the use of insulation, refractory material block the flame directly burning steel structure, reduce heat transfer Of the temperature to delay the temperature rise of steel, the strength of the weakened time. But no matter what approach, the principle is the same.
316L sanitary pipe fire protection measures Outer cladding is to add the outer surface of the steel structure can be cast in situ, you can also use spray method. Cast-in-place solid concrete cladding is usually reinforced with steel wire mesh or rebar to limit shrinkage cracks and to ensure the strength of the shell. Spraying method can be applied to the surface of the steel structure in the construction site to smear sand pump to form a protective layer, 316L sanitary pipe fittings can be lime cement or gypsum mortar, can also be mixed with perlite or asbestos.
316L sanitary pipe fittings welding
316L sanitary pipe fittings with good welding performance. All standard welding methods can be used for welding. Welding can be based on use, respectively 316Cb, 316L or 309Cb stainless steel filler rod or welding rod. For the best corrosion resistance, the 316 section sanitary pipe welding sections need to be post-weld annealed. If 316L stainless steel is used, no post-weld annealing is required.
316 stainless steel, its corrosion resistance, atmospheric corrosion resistance and high temperature strength is particularly good, can be used under harsh conditions; with its excellent work hardening. Sanitary valves are widely used in machinery, equipment, chemicals, dyes, paper, oxalic acid, fertilizers and other production equipment; photography, food industry, coastal facilities, rope, CD rods, bolts, nuts.
Acid and Alkali Resistance of 316L Stainless Steel Sanitary Pipe Fittings and Its Application
316L stainless steel sanitary tube contains less 50% of iron and 10.5% of chromium, and also added such as nickel, titanium, molybdenum, etc., according to the composition of the suspension with different metals, the microstructure is also different included type, ferritic, austenitic, biphasic, precipitation hardening stainless steel. 316L sanitary stainless steel pipe fittings also have different materials.
Sanitary pipe support
General industrial commonly used more tube austenitic stainless steel materials. Optional 316L stainless steel fittings sanitary and fluid medium type, concentration, temperature, pressure, flow rate, and other factors.
316L sanitary valves stainless steel pipe fittings are widely used in the pharmaceutical, food, beer, drinking water, biological engineering, chemical engineering, air purification, aviation, nuclear industry and other areas, the national economic construction has been widely applied to the national production and life, has significant Impact.
Heat treatment process of 316L sanitary stainless steel pipe
Annealing is performed at a temperature in the range of 1850 to 2050 ° C, followed by rapid annealing and then rapid cooling. 316L stainless steel can not be overheated for hardening. 316L sanitary stainless steel pipe has good welding performance. The workpiece will automatically produce intergranular cracking.
In the 304 stainless steel stamping process, generally must be between the process of softening annealing, that is, intermediate annealing.