Item specifice

Specification of manhole cover:

1. Material: ductile iron QT500-7/GG20

2. Grade: B125 C250 D400

3. Loading test: KN125 KN250 KN400

4. Tensile strength: 500 N/2MM

5. Elongation rate: 7%

Usage:

The strength of ductile iron is comparable to the cast steel, and most of them are used in municipal areas to protect the safety of vehicles and pedestrians.

Features of Ductile Iron Manhole cover:

   1. Medium load testing and strength, they have very good toughness and ductility while have a overwhelming advantage on stretch recovery and less noise and lower vibration transmissions. 

   2. Against theft and safety options

 * Zero theft value, reducing potential accident and futher maintenance cost caused by     thieves.

 * Surface anti-slip thread to guarantee safe road condition even in extreme weather.

 * Lock are available as an option mold into the grate to improve the security rate.

 * Non-electricity conduction and non-heat conduction.

3. Light weight

 * Compared with cast iron manhole cover and grates, duction iron are more than 50%       lighter than it.

 * Lighte weight allows more lading per vehicle, more convenient transportation and       economical saving.

 * Allows a safer working condition, which a single worker is enough when installation     without risk of injury.

4. Durable service life

 * More than 30 years service life without crack and color fading, comparing to 5 years of   cast iron.

 * Anti corrosion, water, dust and pets tight, wellsealed prevent poisonous gas leaking     out.

 * Without displacement, freely radio signal passing.

 * Higher and lower temperature tolerance with the range minus 40 degree and plus 200     degree.

 * Wear indicators available when thread depth is in a danger value.

5. Free design

 * You can just offer the photoes or size then we will design it for you because we have our R&D team.

6. Package

 * Iron pallet or wooden pallet or according to customer's requirements.