Key points for installing titanium pipes
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① The prefabrication of titanium pipes should be carried out in a closed facility, separate from other pipe prefabrication tasks. The tools and equipment used must be free of iron ions or protective measures such as isolation must be implemented； ② The cleaning of contaminants from the surface of titanium materials should be carried out in accordance with specifications. ③ Non-metallic slings should be used for lifting; it is strictly prohibited to damage the pipes, and they must not come into contact with other materials. ④ Material cutting is carried out using mechanical methods (toothless saws or sawing machines). After cutting with a sawing machine, the surface is gently polished using ferrite-free corundum sandpaper of grade 120 or grinding wheels, so that the resulting surface is free of cracks, holes, severe scratches, and wrinkles. ⑤ Insulation plates are installed at the contact surface between the pipeline and the support as required by the design. ⑥ After the titanium tubes are installed, a warning sign should be placed stating: “It is strictly prohibited to strike sparks on the titanium tubes, use them as support bases, tie wires to them, erect scaffolding on them, or hang chain hoists on them.”
There is a lot to know about welding titanium pipes
The construction of titanium materials requires attention to the following aspects: 1. Since titanium is an active metal that is highly sensitive to contact with iron ions, it is necessary not only to coat the surface of the titanium material but also to clean any cracks as well as the welding materials used； 2. Titanium is highly susceptible to oxidation; the purity of argon should generally be above 99.999%. In addition to ensuring argon protection inside the tube, it is also necessary to install a proper trailing shield at the welding tip to provide argon protection ； 3. When welding titanium materials, it is essential to pay attention to the interlayer temperature. The degree of oxidation that occurs after welding must be determined accurately by examining the color of the surface metal; any issues detected during welding should be promptly removed by grinding ； 4. The non-destructive testing standards for titanium materials differ from JB4730, which is commonly used for pressure pipelines; instead, national standards are applied, and this is often a point that is easily mistaken.