Grade 12 titanium welded pipe development status and environmental protection

1. Titanium - titanium alloy straight seam welded pipe (also known as "titanium - welded pipe") is a coil or thick plate rolled into a pipe by coiling, and then welded a pipe product. At present, the U.S. production of titanium alloys are mainly Gr.1, Gr.2, Gr.12, etc., the domestic production of TA1, TA2, TA10 and so on.

2. Titanium welded pipe cost and environmental advantages are obvious

Titanium seamless pipe process is relatively complex, generally using three-roll or multi-roll mill, drawing machine for a specific specification of the billet for a number of rolling or drawing system, and ultimately through the reduction of the diameter of the wall to produce seamless pipe. The productivity and yield of this process are very low. Titanium tube from titanium sponge to pipe, by rolling or drawing, material waste is greater, the rate of material is only about 50%, and can not realize the mass production, the production cycle is long.

This paper describes the development of an automatic continuous production line using cold-formed sections, welded sections, on-line heat-treatment sections, sizing and straightening sections, non-destructive testing sections, and air-tightness testing sections. The material utilization rate of welded pipe manufactured by titanium sponge is generally about 80%, and if titanium coil is used as raw material, the material utilization rate can reach more than 95%. Accompanied by the rapid development of China's titanium industry and the increasing maturity of welding technology, the production efficiency of titanium welded tubes will be greatly improved, the stability of product quality, consistency and production efficiency will be higher, according to the customer requirements of the fixed-size cutting length, shorten the delivery time, improve the material utilization rate, reduce unit costs.

Titanium tube is generally produced by rolling, drawing and other processes. A large amount of rolling oil, drawing oil, etc. will be used in the production, the production site is seriously polluted. Titanium tube by rolling, drawing process, need to degrease the tube inside and outside the surface of the grease, dirt, etc., pickling, pickling process is more polluting to the environment. In order to safeguard the health of the operator and protect the environment, it is necessary to increase the protective equipment and protective measures, thus increasing the capital investment and raising the cost of product production. However, titanium alloy tubing through the automatic production line continuous, mass production, stable quality, high production efficiency, the production process, in addition to a certain amount of water and electricity and other energy consumption, there is no pollution of the environment.
With the deepening of people's understanding of titanium welded pipe, titanium welded pipe in the petrochemical industry will be recognized by the market, and its application scope and market share will continue to expand. Compared with ordinary fluid transport pipelines, titanium welded pipe, although the investment is larger, but the cost is lower than titanium seamless pipe, and from the service life and maintenance cycle of the two aspects of the analysis, you can make up for the use of titanium welded pipe in pipeline system investment, reduce the number of regular maintenance, shorten the downtime, improve the quality of the product, and extend the service life of the pipeline, so as to reduce the cost of production.