quality hot rolled astm a479 316l stainless steel bar

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Q:Advantages and disadvantages of PPR lined stainless steel pipe and PPR aluminium plastic pipe
1 、 aluminum plastic composite pipe including lap welding aluminum plastic composite pipe and butt welding aluminum plastic composite pipe, butt welding, the thickness of the aluminum strip and welding process requirements are relatively high.2, the existence of lap welding aluminum layer, increased the modulus of the pipe, and the wall thickness is more thick, installation of pipe is more difficult to bend, need to use more pipe fittings for connection, therefore, field construction is more difficult than PP-R. And the plastic aluminum steady state composite tube must first strip off the outer protective layer, the adhesive layer and the aluminum layer before welding, and then can connect. If the adhesive layer is not clean, it will lead to welding unreliable and leak point.
Q:What kind of stainless steel square tube is used in ordinary square tubes?
Stainless steel square tube is a kind of hollow long strip steel, because the section is square, so it is called square pipe. As the pipe conveying fluid, such as oil, gas, water, gas, steam, in addition, the bending and torsional strength of the same, the weight is light, so it is widely used in the manufacture of machinery parts and engineering structures.
Q:Does stainless steel pipe belong to hardware?
It belongs to me. Stainless steel pipe belongs to the category of hardware in the steel, and stainless steel pendants, flat iron is more hardware. All belong to steel alloy.
Q:What's the easiest way to distinguish between stainless steel 202 and 304?
304# and 202# are American Standard grade 304 is 0Cr18Ni9202shi 1Cr18Nn8Ni5N
Q:Disadvantages of stainless steel tubes
Galvanized iron pipe is the most widely used material at present. Because of the corrosion of galvanized iron pipe, the content of heavy metals in water is too high, which affects the health of human body.
Q:What are the differences in the properties of hot-rolled and cold-rolled stainless steel tubes?
Stainless steel tube with hot and cold points, hot rolling is made by stainless steel tube billet heated to red state, through processing a mold, which is cold-rolled stainless steel pipe billet collocation through different mould at room temperature, finally by drawing rolling method, stainless steel tube working together the size of the need to.
Q:How can the inner walls of stainless steel tubes be polished?
After polishing, because the surface oxide layer received damage, it is best to use acid solution surface passivation treatment, otherwise it is easy to rust.
Q:What are the connecting methods of stainless steel pipes for indoor water pipes?
Card type features: easy to install, connecting the external pipe, the internal rubber ring is evenly compressed into hexagonal. Scope of application: cold water system, pipe direct drinking water system, and more suitable for pipe installation. The utility model has the advantages that the connection is simple and convenient, the working hours are short, and the cost is moderate. Drawback is the single application, the maintenance of trouble, both the pipe sealing ring in aging and need to be replaced more trouble, because the connection was stuck, replacement is the need to both ends of the pipe to replace the sawing.
Q:What is the difference between the stainless steel tube and tube rolling
We usually say the hot-rolled seamless slide into thermal expansion, is to use tools of the pipe up, supporting circle. Cold is the opposite, a fixed mould outside the inner hole of the fixed mandrel, from the outside to make him thinner. Annealing is required before hot rolling, without cold rolling. In hot rolling billet after annealing, stainless steel seamless pipe, wall production minus a broaching machine after reaming compression capability, good flexibility, technological properties were superior to those of ordinary tube ligation.Now the Zhejiang area in the production of stainless steel seamless pipe is widely used cold production technology, but higher production efficiency of 2 roller cold rolling mill, a lot of strength of the manufacturers are equipped with, because the price of the purchase quantity not more general factory. It is commonly used in conjunction with cold drawn units to increase efficiency and reduce production costs.It is precisely because of their differences in production and processing technology, but also makes the hot-rolled stainless steel and cold-rolled pipe has the following differences:A: seamless pipe and tube rolling produced products, though they are working with the tube, but the application is different, generally used for mechanical drawing, heat exchanger pipe, pipe and tube rolling engineering, generally used for fluid transport in pipeline construction;Two: seamless pipe and tube rolling process and product quality; slide processing, low defect, high precision, uniform grain size;Three: two different prices, the price to slide rolling ratio is more expensive;Four: the stainless steel tube ligation can only in diameter 38-159 pipe, or other drawing process. Because of the production process, the tube size is relatively accurate. In the purchase of steel tubes, or tube rolling is drawing, but also the actual situation needs to choose.
Q:Why can't stainless steel tubes be cut with acetylene?
That is because the iron element in the high temperature, if the above 99,6% will occur on the oxygen oxidation phenomenon is very strong, because of the heat transfer cycle, in order to make the cutting to continue uninterrupted, continuous heating it when cutting calories.

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