Stainless steel hose testing standards: tightness test: hose pressure test should be carried out after passing the tightness test test medium dry, clean air gas delivery industry standard metal hose, also need to use nitrogen or according to user other inert gas test equipment for the electric pump (or cylinder group), pressure gauge, specimen mount sink plug one end of the hose, the other end of the air intake phase, which leads to a pressure equal to the nominal pressure of the gas, the test pieces immersed in a water bath to remove adsorbed in the net put blisters Paul 10min inspection sample test pressure test without leakage pressure test medium for clean water, a chlorine ion content of not more than 25ppm test device for the electric or manual pump, pressure Table (range is 1.5 to 4 times the test pressure, the same below) will be placed flat sample gas delivery hose metal hose, plug one end of the installation with the exhaust valve, and the other end connected to the pump outlet pipe. Injecting water into the tube, drained air, close the exhaust valve, and then slowly increase the pressure to the specified value insurance 5min, check for any leaks in the sample, seal the surface appearance of the parts for damage detection hose connector does not allow cracks, within abrasions, burrs, trachoma, welding slag and other defects hose, the outer surface should be clean and dry, does not allow rust, iron and other residues are present nets should fit the bellows, the bellows surface allowed to have bumps, welding slag and other defects steel mesh sleeve off (default) the total number of roots in Table 5 wire steel mesh nets flowers should be evenly distributed gas delivery hose with metal promotional price, its surface should be smooth, it does not allow folding, twisting, etc. Defects stainless steel hose Model Specification how to choose Ning stainless steel tube Co., Ltd. to introduce a few simple products how to choose the best life you can use and how to avoid selecting an inferior product, the product uses the brunt of course, different use of the environment to determine the different materials, generally as 304 stainless steel, large diameter metal hose material: various types of pipeline compensation should be based on design requirements or corrosive medium, medium temperature in the selection of material, usually 321,304,316 , 316L stainless steel and other materials. 2, the pressure is also a consideration for the user, in the pressure of the product designed primarily for the thickness of the bellows, this is the industry's reluctance to customers, the internal structure designed to reduce the cost of products for industry and pressure range for the plumbing above is different, generally with 0.1-2.5MPA particular purpose can be customized, can reach 30Mpa 3, identification of materials, the industry's most simple way is to use a magnet to suck the gas delivery Industry leading metal hose, usually iron, carbon steel are other ways attraction: color identification, identification with the magnet used with copper sulfate to identify, for steel special properties, we need to take the following three approaches They were identified. Grinding flower identification, identification annealing method, the most straightforward way to identify chemical characterization method is to use stainless steel syrup 4, product assembly welder: This point and the company's professional equipment and professional gas delivery industry has a direct relationship with a metal hose Standard | gas transportation metal hose | hose Hopen Hopen by Ning County stainless steel metal hose Limited. Ning County Hopen stainless steel metal hose Limited (www.haopengguanye.com) (www.haopengguanye.com) strong, credible, in Dezhou hose industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hopen hose into the brilliant and you work for a better future!