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Shandong Hengtong Expansion Joint Manufacturing Co., Ltd. was established in 2001. It mainly develops and manufactures bellows expansion joints. It has successively obtained the certifications of five major classification societies: China TS, US ASME, EU PED, China CCS, US ABS, France BV, Korea Kr, Norway DNV. Expansion joint material: ferrous metal, stainless steel, duplex steel, Hastelloy, nickel and nickel-based alloy, titanium and titanium-based alloy, zirconium and zirconium-based alloy, tantalum and tantalum-based alloy, niobium and niobium-based alloy Expansion joint.