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Shandong Hengtong expansion joints manufacturing Co., LTD is located at the foot of mount Tai, Taian city, Shandong PR. China. Our company is exporter of bellows expansion joint and ISO 9001 certified manufacturer. ASME(U) approved, and national patent certificate(No.:ZL200520124753X) of “thick wall multi-convolution hydraulic forming bellows expansion joint” awarded. People’s Republic of China Manufacture license of special equipment (pressure piping accessories) authorizes. Our bellows are formed by hydraulic press of 22 000T，12 000T, 2 400T, 2 000T, 1 200T, 350T, and roll forming method also can be used. A bellows (DN3950x42 Thk.) was fabricated hydraulically. Manufacturing capacity ND(nominal diameter)≤20000mm Thickness≤60mm Corrugation 1-16
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