LONTAIN.LONTAIN, established in 2003 and located in Jiangdu District, Yangzhou, is a specialized manufacturer of seamless steel pipes with an annual production capacity of 700,000 tons. Its product range covers dimensions from Φ19 to Φ1422 × 2.5 to 150 mm. The company manufactures high-strength steel pipes up to pipeline grade X100, encompassing diverse materials including low-temperature and high-temperature carbon steel, high-strength microalloyed steel, corrosion-resistant steel, chromium-molybdenum/chromium-nickel high-temperature alloys, and stainless steel. These products are extensively utilized in ultra-supercritical thermal power generation, energy, and machinery manufacturing sectors. LONTAIN strictly implements internationally advanced quality control systems, holding certifications including TÜV ISO9001, ISO14001, and OHSAS18001 management systems. It has also obtained product certifications such as API 5CT, API 5L, PED, CPR, AD2000, and IBR, along with factory approvals from multiple national classification societies. Its wholly-owned subsidiary, Longchuan Energy Equipment Co., Ltd., further expands the company's business qualifications. Key product lines include offshore engineering, pipelines, boilers, petrochemicals, construction machinery, gas cylinders, oil casing and tubing, stainless steel, and special-purpose steel pipes.
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