AIGI Environmental Inc.
AIGI Nickel Plated H-13 Disc Springs
AIGI Nickel Plated H-13 Disc Springs are heavy-duty live-loading springs for bolted flanges in chemical environments. A nickel-plated finish over the H-13 spring steel gives a hard, wear- and corrosion-resistant surface, so the spring keeps holding bolt preload where plain steel would pit and weaken.
Product Benefits
- Corrosion-resistant finish: The advanced nickel plating shields the spring from acidic and alkaline attack and can even withstand prolonged exposure to halogens.
- Protected surface: The coating guards the spring metal against scratching, so the protective layer stays intact in service.
- Longer life, steadier preload: That corrosion resistance dramatically extends disc spring life and strengthens its ability to hold preload over time.
- The stronger of the two: Of the two AIGI nickel-plated grades, H-13 offers the higher strength and handles the hotter end of the range.
Where It's Used
- Petrochemical flanges: Designed for petrochemical service, where bolted joints face aggressive process media and corrosive atmospheres.
- Joints that move: Disc springs earn their place wherever vibration, differential thermal expansion, gasket relaxation or bolt creep would otherwise let bolt load fall away.
- High-strength bolting: The H-13 grade is matched to high-strength alloy steel bolts such as grade 8.8 or SAE 8.
Good to Know
- Right load matters: Too little spring load lets the joint leak, while too much can crush the gasket, so the spring has to be chosen for the joint.
- Calculated selection: AIGI's Live-Loading Calculation Software (LLCS), available through authorised distributors, works out the live-loading stress and recommends the springs and installation torque.
- Tested batches: AIGI can supply a certified load-deflection curve for each batch of springs.
- Plain version available: Conventional H-13 disc springs without nickel plating are also available.
