The allowable depth of stainless steel straight track is also required. For hot rolled and hot extruded steel pipes， stainless steel pipes with diameter less than or equal to mm and not greater than % of the nominal wall thickness， the large depth is less than or equal to .mm， and the cold drawn (rolled) stainless steel pipes are not greater than % of the nominal wall thickness and the large depth is less than or equal to .mm.
3B cold rolling shall be subject to heat treatment， pickling or similar treatment， workbench，316L stainless steel pipe utensils and medical instruments in the food industry The demand for tableware，30 stainless steelHow to better use towel hanging bracket and bracket of refrigerator in daily life is increasing.
The internal and external greasy dirt and sundries at the pipe end shall be completely removed to keep the pipe inside the pipe fittings clean.
YYamagataWhile Chinas exported steel pipes are frequently subject to foreign anti-dumping and countervailing investigations， the upper and lower jaw are fixed modules， and the pressure is set to output a constant pressure of MPa. The detection standard is to observe the seam of the upper and lower jaw and press it once or twice.
This kind of steel pipe can be divided into stainless steel seamless steel pipe and stainless steel welded steel pipe (slotted pipe). According to different manufacturing processes， it can be divided into several basic types: hot rolling， extrusion， cold drawing and cold rolling. According to the section shape， it can be divided into circular pipe and special-shaped pipe. Circular steel pipe is widely used， but there are also some square， rectangular，316L stainless steel pipe semi-circular， hexagonal Equilateral triangle， octagonal and other special-shaped stainless steel pipes.
In conclusion， when calculating the approximate weight of stainless steel pipe and multiplying it by the unit price， the price of m stainless steel pipe can be roughly obtained， which can be used in the project budget.
fRockwell hardness the Rockwell hardness test of stainless steel pipe is the same as Brinell hardness test. The difference is that it measures the depth of indentation. Rockwell hardness test is widely used at present， and HRC is second only to Brinell hardness Hb in steel pipe standards. Rockwell hardness can be used to measure metal materials from very soft to very hard， which makes up for the disadvantage of Brinell method， It is simpler than Brinell method and can read the hardness value directly from the dial of the hardness machine. However， due to its small indentation the hardness value is not as accurate as Brinell method.
UCold rolled non oriented silicon steel strip consists of nominal thickness (expanded by times) + code a + iron loss guarantee value (the value after expanding the iron loss value when the frequency is Hz and the large magnetic flux density is T by times). For example，316L stainless steel pipe a indicates that the thickness is .mm and the guaranteed value of iron loss is & le; cold rolled non oriented silicon steel strip.
MSincere serviceCorrosion test: the industrial corrosion-resistant steel pipes provided shall be tested for corrosion resistance according to the standard provisions or the corrosion agreed by both parties， and there shall be no tendency of intergranular corrosion.
tIThe surface quality，30 stainless steelHow to better use appearance and dimensional accuracy of cold rolled steel strip are better than those of hot rolled plate.
Batch size: a small number of single batch products will affect the unit price.
Stainless steel pipe national standard thickness in the stainless steel pipe industry， the quality of national standard and non-standard is similar， mainly due to the difference in thickness. A thickness of national standard is actually mm， but a thickness of non-standard is actually only .mm or other thickness less than mm. Non-standard is basically equivalent to winning the bid. Standard index size (mm) label number standard implementation standard gbt- non-standard specific thickness ratio outer diameter steel pipes are produced according to the standard. non-standard belongs to customized difference. Wood office says ha ha customized on demand. thickness area: the difference between standard， thickened， stainless steel American Standard and national standard mainly lies in C content and P content; The C content and P content of Chinese standards are lower than those of American Standard ASTM A@_@ The two important elements of material are chromium and nickel， normalizing not in the national standard. The corresponding national standard is crni.
Interpretation and observationuCarbon structure delivery status: delivered in heat treatment (annealing， tempering after normalizing，tisco stainless steel sheet,taigang stainless steel sheet,stainless steel sheet,stainless steel coil,stainless steel strip,stainless steel tube-TISCO Stainless Steel Co.,Ltd high temperature tempering).
VUsing CrO and hsoho as the main components and adding an appropriate amount of mnso.ho coloring solution， the chemical coloring of stainless steel industrial pipe was carried out. The effects of pretreatment process， coloring solution temperature， mass concentration and coloring time on the color film of stainless steel industrial pipe were discussed. Through a large number of experiments， a good formula and process range of coloring solution are obtained. With the increase of temperature and time， the film thickness increases， and the color changes are brown， blue， golden yellow， purplish red and green. After curing and sealing treatment， the colored film of stainless steel industrial pipe has more uniform surface color， good reproducibility， and significantly improved wear resistance and corrosion resistance.
Quality: different steel strip materials determine the quality of stainless steel， which is a major factor affecting the price of stainless steel at present.
y series & mdash; Ferritic and martensitic stainless steel.
iVWindproof and ventilation. Where there is wind， please take measures to block the net， and take appropriate ventilation measures indoors.
. Raw material problem of stainless steel pipe. If the hardness is too low， it is not easy to polish (BQ is not good). If the hardness is too low， orange peel is easy to appear on the surface during deep drawing， which affects BQ performance. BQ with high hardness is relatively good.