Factoryin1988withtheMinistryofCommunicationsResearchanddevelopmentofmetalbellows,theproducthasabsorbedtheadvantagesofforeigncounterparts,toreachthenationalindustryStand
Factory in 1988 with the Ministry of Communications Research and development of metal bellows, the product has absorbed the advantages of foreign counterparts, to reach the national industry Standards (JG/T3013-94), widely used in highways, bridges, railways, and large-span prestressed concrete construction industry, product quality excellent, safe and reliable performance.
Metal Corrugated Pipe Material: k215-a (GB4175.), Armored galvanized steel strip (GB4175.2), Q195 metal bellows appearance: bellows appearance clean, no holes, no cracking bite, no buckle
Technical Parameters
Round metal bellows specifications：
| Inner diameter | Outer diameter | Inner diameter | Outer diameter | Inner diameter | Outer diameter | Inner diameter | Outer diameter |
| 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 metal bellows section size (according to user requirements)
 |
a | 19 | 22 | ||||
| b | 60 | 70 | 90 | 65 | 74 | 90 | |
Circular metal bellows mechanical properties(JG/T3013-94)
| Project | Quality Standard |
| Anti - concentrated load（KgF） | 890(100)Deformation is not greater than0.2D |
| Anti-uniform cloth load N（KgF） | P＝πD＠Deformation is not greater than0.1D |
| Vertical leak | With the above test tube irrigation grout not slippery |
| Stretch axiallyN（KgF） | 2450（250）Corrugated pipe is not damaged |
| Anti-bending test | R = 30D without leakage |
Flat metal bellows mechanical properties(JG/T3013-94)
| Project | Quality Standard |
| Anti-concentrated loadN（KgF） | 490(50)Deformation is not greater than0.2D |
| Anti-uniform cloth loadN（KgF） | P＝2（a＋b）Deformation is not greater than0.2D |
| Vertical leak | With the above test tube irrigation grout not slippery |
| Stretch axiallyN（KgF） | 980（100）Corrugated pipe is not damaged |
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