x52 line pipe

Daily life lead to stainless steel rust factors are: the material not up to standard or shoddy products, production and processing technology is not mature, the external environment impact, stainless steel or corrosive residue deposited on the uns s32750 sheet surface of pollutants. The stainless steel staircase column rust spots, how should we deal with?
We can use the pickling paste or spray auxiliary rust part to passivation chrome oxide film formation, make its restore corrosion corrosion resistant ability. Application of water to wash after pickling, better to remove all contaminants and corrosive residue.
After treatment available to polishing polishing equipment. For local slight rusty spot available petrol, oil mixture combined with dishcloth rusty spot. Also can use the sand blasting. Glass or ceramic particles shot blast cleaning, annihilation, scrub and polishing. Z is under the condition of dry clean, avoid the material cause of contaminants from corrosion medium body. Clean up after the proposal to polished with polishing equipment.
Rolling flange غير مجاز مي باشدt lower than x56 line pipe forging. But some of the large flange forging is not to come out. Such products are mostly with theoretical weight for weight, in accounting, it is not the water line, check mouth, bolt hole and chamfering of lose weight. Tablet product prices low, but if have the process such as processing dovetail groove or special thin thickness of large flange price will be higher. Reason is a machining process complex and thin products and thick spent working procedure is the same. Theoretical weight is according to the following formula to accounting.
In the condition of use is given priority to with ferrite 321 stainless steel sheet organization of stainless steel. Chromium content in 11-30, with a body centered cubic crystal structure. This kind of steel is generally not containing nickel, sometimes also contains a few Mo, Ti, Nb element, this kind of steel with heat conduction coefficient is big, small expansion coefficient, good oxidation resistance, good resistance to stress corrosion and other features, more used in the manufacture of air, steam, water and oxidation resistance acid corrosion parts. This kind of steel is low plasticity, plastic and corrosion resistance decreased obviously after welding faults, so the restriction on the use of it. Pithy skills (AOD and VOD) outside the furnace can make the use of the gap element such as carbon, nitrogen drops greatly, so that this kind of steel is widely used.