Tenova LOI Thermprocess received an order from Russian’s JSC Pervouralsk Pipe Plant for a roller-hearth continuous furnace system for bright annealing stainless steel pipes in a 100% hydrogen atmosphere. The heat-treatment system is designed as a roller-hearth furnace for the bright annealing of 2,000 kg/hour of austenitic stainless steel and nickel-based alloy pipes. The solution annealing of these high-alloy steel grades is carried out in the temperature range of 2012-2192°F (1100-1200°C). The tubes are heat treated in this continuously operating system using a 100% hydrogen atmosphere as process gas.
Danieli Olivotto Ferrè started up a tube roller-hearth annealing furnace at Tenaris Tamsa in Veracruz, Mexico. The furnace is designed to treat steel tubes coming from cold or hot processing with a maximum throughput of 5 tons/hour. It is able to perform different heat-treatment cycles, including normalizing, annealing, tempering and stress relieving. The pipe to be treated has an OD range from 15-120 mm, thickness from 1.5-20 mm and length up to 16 meters (52.5 feet).
Saarstahl is investing approximately $19 million to expand heat-treatment capacity at Saar-Blankstahl, its subsidiary in Homburg, Germany. The investment includes a roller-hearth furnace for heat treatment; construction of a 4,300-square-meter hall with cranes; and a straightening machine with a corresponding packaging unit. The new heat-treatment plant is scheduled to begin operation in fall 2020.
SECO/WARWICK received an order for a roller-hearth tube heat-treatment furnace from Tube Investments of India Ltd., a leading Indian tube manufacturer. The furnace, which has been successfully commissioned, is custom-designed for bright annealing and normalizing of carbon-steel tubes (ERW and welded), cold-drawn welded precision steel tubes, mother hollow tubes and as-drawn tubes. It is equipped with single-ended, self-recuperative radiant-tube burners, automatic ignition system and flame monitoring system.
Check out the February 2020 issue of Industrial Heating, featuring an editorial on Nonferrous – Products and Their Processes, along with the Inspection and Maintenance Critical to Safe Fuel-Train Operation.