Factory in 1988 with the Ministry of Communications jointly developed metal bellows, the product has absorbed the advantages of foreign products to industry-standard National Industry (JG/T3013-94), widely used in highways, bridges, railways, and large-span prestressed concrete construction industry, superior product quality, performance, safe and reliable.
Metal bellows material：K215-A(GB4175.)Sheathed galvanized steel strip(GB4175.2)
Metal bellows Appearance:Bellows look clean, no holes, no cracks, no release

Product Photos:

• Metal bellows
• Circular metal bellows
• Flat-type metal bellows

Technical parameters：

Circular metal bellows Specifications: Diameter OD Diameter OD Diameter OD Diameter OD Φ35 Φ42 Φ40 Φ47 Φ45 Φ52 Φ50 Φ57 Φ55 Φ62 Φ60 Φ67 Φ65 Φ72 Φ70 Φ77 Φ75 Φ82 Φ80 Φ87 Φ85 Φ92 Φ90 Φ97 Φ95 Φ102 Φ100 Φ107 Φ105 Φ112 Φ110 Φ117 Φ115 Φ122 Φ120 Φ127 Φ125 Φ132 Φ130 Φ137 Φ135 Φ142 Φ140 Φ147 Φ145 Φ152 Φ150 Φ157	Flat-type metal bellows inside the section size (according to formulate user requirements) a 19 22 b 60 70 90 65 74 90
Circular metal bellows mechanical properties(JG/T3013-94) Item Quality Standards Anti-concentrated load N(KgF) 890(100) Deformation is not more than 0.2D Anti-uniform Loads N(KgF) P＝πD＠Deformation is not more than 0.1D Vertical leakage Tested with more than mud tubes do not leak water slurry Axial tensile N(KgF) 2450(250)Bellows did not damage Anti-bending test R＝30D Without leakage	Flat-type metal bellows mechanical properties(JG/T3013-94) Item Quality Standards Anti-concentrated load N(KgF) 490(50)Deformation is not more than 0.2D Anti-uniform Loads N(KgF) P＝2（a＋b）Deformation is not more than 0.2D Vertical leakage Tested with more than mud tubes do not leak water slurry Axial tensile N(KgF) 980（100）Bellows did not damage