Titanium threaded flange as a commonly used connection equipment, its long-term use process due to mechanical damage, media chemical erosion erosion, sealing surface cracks bubble, sealant quality is not good, etc., then there will be titanium threaded flange surface damage, flange combined with the location of leakage and other issues. Damage to the flange surface can be repaired by manual on-site grinding after local overlay welding, machining repair or replacement, or polymer composite materials can be used for on-site repair.
In the petrochemical industry, because there is an annular metal pad at the combination of titanium threaded flanges, high temperature resistant sealants are often used for repair. High temperature sealant has excellent temperature resistance, the highest temperature resistance up to 900 ℃; good pressure resistance, under steam pressure to withstand 25Mpa, no seal ring flange to withstand 45Mpa; excellent sealing performance, because the product has a good plastic change, heat will not curing, sealing film will not be destroyed, thus ensuring the sealing surface of the machine parts; products are easy to remove, the used sealing surface can be used The used sealing surface can be easily wiped off with anhydrous ethanol or acetone without adhering to the sealing surface. The use of high-temperature sealant is as follows: first use anhydrous ethanol to clean the metal gasket and titanium flange bonding surface, so that the surface is free of dirt, after the high-temperature sealant will be evenly applied to the metal gasket surface and flange bonding surface, to ensure the thickness, and finally tighten the bolt to ensure that the material will be filled with the bonding position dense.
Chemical industry, repair titanium threaded flange using polymer composite materials, it can be carried out on site flange end damage repair, can be convex flange and flat flange or different forms of end sealing surface overhaul, polymer composite material is polymer in essence, with chemical corrosion resistance and high temperature resistance, the material has a strong bonding force and pressure resistance performance, this process is more independent of the special environment The more complex the environmental conditions, the more the superiority of the technology can be highlighted.
