LONTAIN.LONTAIN was established on August 4, 2003, with its registered location in Jiangdu District, Yangzhou City. The company has an annual production capacity of 700,000 tons of seamless steel pipes, with product dimensions fully covering Φ19-Φ1422 × 2.5-150 mm. Pipeline steel grades reach up to X100, including low-temperature carbon steel for -75°C, high-temperature carbon steel, microalloyed high-strength steel, corrosion-resistant steel for high-sulfur environments, chromium-molybdenum and chromium-nickel high-temperature alloys, and stainless steel. These products are widely applied in ultra-supercritical thermal power generation, energy, and machinery manufacturing sectors. LONTAIN consistently implements internationally advanced quality control and assurance systems, adhering to continuous product improvement principles and the TÜV ISO9001-2008 quality management system. Yangzhou Longchuan Energy Equipment Co., Ltd., a wholly-owned subsidiary of Longchuan Steel Pipe, holds ISO14001:2004 Environmental Management System and OHSAS18001:2007 Occupational Health and Safety Management System certifications. The company holds international product certifications including API 5CT, API 5L, PED, CPR, AD2000, and IBR, along with factory certifications from multiple classification societies such as DNV-GL, ABS, LR, BV, and CCS. Primary product categories encompass: offshore engineering, pipeline systems, boilers, petrochemical and fertilizer equipment, engineering machinery, gas cylinders, oil casing and tubing, stainless steel pipes, and specialty products.
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