Posted on 11 Oct 2010
Düsseldorf, October 11, 2010
Major order for PWS
New spiral pipe welding plant for Shengli cuts energy consumption by 30 percent
The Shandong Shengli Steel Pipe Co., Ltd., China, placed an order with PWS a part of SMS Meer, both Germany, for the supply of a complete two-stage (off-line) spiral pipe welding plant.
PWS is to supply an integrated plant solution consisting of spiral pipe forming and tack welding machine for forming and prewelding of the hot-rolled steel strip and the downline finish-welding stands. Shengli will thus be able in the future to produce high-quality pipes from 24 to 64 inches in diameter from high-alloy steels. The pipes will be employed predominantly for natural gas and oil pipelines. The company from Shandong Province can produce up to 240,000 t of spiral-welded pipes per year. Commissioning is scheduled for September 2011.
The highlights of the plant include the energy-saving welding tech-nology from PWS. PWS Managing Director, Michael Stark explains: "For our welding technology we employ welding current sources with-out transformers. The important parameters for a stable welding pro-cess that are normally generated by means of electrical components in the welding current source are now modulated flexibly by power electronics. Through the elimination of the welding transformer and other electrical components in our welding technology, we achieve efficiencies of over 90 percent. The result is an energy saving of over 30 percent compared with the older technology."
The technology also enables a significant increase in the welding speed with the same stability of the welding process. This result is obtained through modern current source technology and process control. The Shandong Shengli Steel Pipe Co., Ltd. forms part of the Shengli Oil and Gas Pipe Holdings Limited and supplies pipes predominantly for the nearby Shengli oilfield, the second-largest petroleum base in China. The field is located near the city of Dongying in the eastern Chinese province of Shandong. The petroleum reserves of the Shengli oilfield are estimated at around 4.8 billion t and the natural gas reserves roughly 230 billion cubic meters.
The technology also enables a significant increase in the welding speed with the same stability of the welding process. This result is obtained through modern current source technology and process control.
The Shandong Shengli Steel Pipe Co., Ltd. forms part of the Shengli Oil and Gas Pipe Holdings Limited and supplies pipes predominantly for the nearby Shengli oilfield, the second-largest petroleum base in China. The field is located near the city of Dongying in the eastern Chinese province of Shandong. The petroleum reserves of the Shengli oilfield are estimated at around 4.8 billion t and the natural gas reserves roughly 230 billion cubic meters.
