Shuozhou 70/80/90 PRESTRESS scale light metal bellows [the lead] metal bellows is one post-tensioned concrete structure will be reserved pore materials, the company is based on the information at home and abroad, and with Each relevant institutions jointly developed product of its features are: new construction technology, fast, short, good quality, with pressure, resistance to penetration, flexibility and good, and therefore in a variety of medium-sized bridges, high-rise large span construction, curved, curved architectural engineering function widely used. scale light brand of metal bellows are not galvanized or galvanized sheet steel with a volume of the machine by the pressure wave, spiral folded seams made with weight Light, stiffness, bending easily connect simple, low friction coefficient and good adhesion to concrete, etc., is post-tensioned tendons Kong Daocheng type with an ideal material, size (diameter) are: 50,55,65,70 , 75,80,90,100,110,120,150,200,300mm etc. Bellows can follow the inner diameter of the calculation specifications, can also be considered in accordance with the outer diameter of the inner diameter of the majority of people in the industry according to the count, the inner diameter of the specifications are 50mm-100mm, (the whole ten coefficients), and of course 55mm bellows, as 100 above, a lot of places are not provided (not discussed). Industry standards and regulations of the country: in line with GB / T9647-2003 national standards, "prestressed concrete bridge with metal bellows" JG225-2007. Use areas: national key project roads and bridges, railway bridges, building water conservancy, electricity and other prestressed concrete bridge with metal bellows for road / rail bridge engineering, slope anchor spiral prestressed bellows, as a novel into a porous materials, it has not afraid of acid, alkali corrosion, sealing, no water seepage, leakage of plasma, ring stiffness, friction coefficient, anti-aging, anti-electric corrosion, flexible, easy to tamper Pizhen smashed, construction connection convenient, is 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.