LS is the FIRST one in China authorized with ASME U and U2 certificates, and National Licenses for designing and manufacturing of pressure vessels.

Over the past 50 years, LS accumulated abundant experiences by supplying over thousands of products to different industries, like: Double tube-sheet heat exchanger, rectifying tower, HCl/SiHCL synthetic furnaces, and other kinds of stainless steel vessels for PV polysillicon project and fine chemical industry; Gasifier, converter, intermediate heat exchanger, circulating water cooler, absorption tower and other kind of big-sized vessels for coal-chemical projects; Big-sized heat exchangers for PVC and salt-chemical projects; Digester, slurry auto-evaporater and other nonferrous vessels for Alumina projects.

The reliable quality, competitive price, punctual delivery and nice after-services made our products earned wide recognition and high credit on the market.