Hengshui City Value Optical Engineering Rubber Co., the predecessor of Taocheng scale light Rubber Products Factory, the company specializes in the production of a bridge with a prestressed corrugated plastic pipe, prestressed corrugated metal pipe, ultrasonic test tube (Acoustic Pipe), embedded bolt corrugated tube, pipe, flat tube, rubber ...... specification is complete quality assurance! The company has passed ISO9001: 2000 international quality system certification, the products are widely used in bridges, roads, concrete works! Prestressed concrete bridge with metal bellows for road / rail bridge engineering, slope anchor spiral prestressed bellows into the hole as a new material, it has not afraid of acid, alkali corrosion, sealing, no leakage , plasma leakage, high ring stiffness, friction coefficient, anti-aging, anti-electric corrosion, flexible, easy to tamper Pizhen smashed, construction convenient connections, not afraid to step on the pressure, easy to transport, etc. stored in custody. Appearance of product quality, structure, size, ring stiffness, local lateral loads, flexibility and other technical indicators, in line with GB / T9647-2003 national standards, JT / T529-2004 transportation industry standards, our products through a national authority in the form of inspection. Metal bellows are galvanized or galvanized sheet steel with a volume of the machine by the pressure wave, spiral folded seams made with light weight, stiffness, bending easily connect simple, low coefficient of friction and concrete bonding good, etc., is an ideal material for post-tensioned tendons 孔道成 type of use, size (diameter) have: 50,55,65,70,75,80,90,100mm like.