Around 40 million tons of seamless tubes are produced worldwide every year, around half of them in high-grade PQF® quality. The main customer is the oil and gas industry, which uses OCTG tubes preferably made using the PQF® process. The reason: As the conditions for extracting fossil energy deposits become more and more extreme, the tubes must meet correspondingly high quality and load requirements. Structural tubes are another area of application for high-quality PQF® tubes. Here, further market shares can be gained through reduced manufacturing costs. Likewise, existing, old equipment for seamless tubes can be replaced by state-of-the-art, digitalized PQF® plants of the fourth generation, as conventional seamless tube lines cannot viably compete with the high-precision PQF® quality nor with the new productivity boost.