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 metal bellows. Prestressed metal bellows product performance: a rigid test: anti-concentrated load 0.75KN or uniform load when 1.5KN, radial deformation ≤0.1d. 2, permeability test: Spam or grout cement ratio of 0.5 for 30 minutes without leaking, leaking slurry. 3, tensile test: axial tension 5KN wall without damage. 4, anti-pull test: buried in concrete pullout pullout design for bolt bolt design for more than 2.3 times the pullout force. 5, bending experiment: 30d when bending radius of curvature, no leakage, leakage of plasma. I produced the prestressed metal bellows (prestressed metal spiral) quality to achieve Ministry of Transportation industry standard "with a metal bellows prestressed concrete bridge" provides JG225-2007, and has been widely used in highway bridges, railway bridges, building water conservancy , electricity and other key national projects.