We see many ductile iron well covers and resin composite well covers every day. Today, let's talk about these two models together. Let's take a look together. Let's first take a look at the thickness standards for ductile iron manhole covers.

  Ductile iron manhole cover

  Thickness standards for ductile iron manhole covers:

  According to GB/T 23858-2009, A15 should be no less than 20mm for green belts;

  2. B125 should be no less than 30mm for sidewalks and non motor vehicle lanes;

  The thickness of C250 should not be less than 30mm for residential communities;

  The thickness of D400 should not be less than 50mm for urban highways;

  4. The thickness of E600 should not be less than 50mm for freight terminals;

  5. The thickness of F900 should not be less than 50mm for aircraft runways;

  According to GJ/T 121-2000, nodular cast iron manhole covers are relatively heavy, with a thickness of not less than 70mm. The technical parameter test load is 400KN (D400) in weight, 250KN (C250) in general, 125KN (B125) in weight, and no less than 50mm in thickness in general; Lightweight thickness not less than 20mm.