The SB-631 A R1 (HD) Heavy-Duty Grey Cast-Iron Surface Box is manufactured in accordance with ASTM A48 material standards and fully complies with the BS EN 124 design requirements for manhole and handhole covers.

It features a cylindrical body with a large circular top cover, incorporating a recessed seating surface and a flanged base for stability. The unit has a clear opening of 330 mm Ø, an overall base diameter of 420 mm Ø, and a depth of 140 mm, designed to meet heavy-duty load capacity requirements.

Key operational features include a single key hole, a single vent hole (10 mm Ø), and a dual locking device for enhanced security. The cover is secured to the box with a stainless-steel chain, ensuring it remains attached during maintenance and operation.

For corrosion protection and extended service life, the product is coated with coaltar epoxy.

Each cover carries a permanent cast-in inscription indicating the manufacturer’s name, production batch number, utility identification (CO – Clean Out – صحية) in both Arabic and English, load class, applicable standard, and country of origin, ensuring proper identification and full traceability.

This product fully meets the specified project requirements in terms of material grade, dimensional conformity, load performance, protective coating, operational features, and permanent identification markings.