Spigot & Socket Joint Pipes (SANS 677)

Manufactured 100D, from 300 mm to 1 200 mm nominal diameter. Most sizes are supplied in a 2.4 m laying length; the 675 mm, 825 mm, 1 050 mm and 1 200 mm pipes are 2.5 m. Pipe classes outside 50D and 100D can be manufactured on request.

Wall thickness runs from 30 mm at 300 mm to 108 mm at 1 200 mm. Mass ranges from 98 kg/m (236 kg per pipe) up to 1 380 kg/m (3 450 kg per pipe), so check lifting capacity before the larger diameters arrive on site. Masses in the table are approximate and subject to manufacturing tolerances.

The table also lists socket diameter (N) and socket length (B) for every size — take those figures into account when setting out trench width and bedding, since the socket is wider than the barrel.

The joint is sealed with a rolling or sliding rubber ring, installed using a soft soap lubricant. Do not substitute a petroleum-based lubricant, and do not exceed the allowable joint deflection for the size being laid.

Maximum joint deflections are: 2.0° for 300–375 mm, 1.5° for 450–600 mm, 1.0° for 675–900 mm, 0.75° for 1 050–1 200 mm and 0.5° for 1 350–1 800 mm. Exceeding these figures compromises the seal, so curves should be set out to suit the deflection available rather than forced at the joint.

1. What is the difference between spigot & socket and interlocking joint pipes?

The spigot & socket joint is sealed with a rubber ring; the interlocking joint is not. Interlocking pipes are non-water-tight and keep a constant outside diameter, while socket pipes give a sealed joint with a wider socket at each connection.

2. Do you supply spigot & socket joint pipes in KwaZulu-Natal?

Yes. Global Precast Coastal supplies spigot & socket joint pipes from its factory in Port Edward to contractors, municipalities and consulting engineers across KwaZulu-Natal, with a sales office at 71 Old Main Road, Hillcrest for enquiries closer to Durban. Send your site location with your enquiry to confirm transport arrangements and lead times.

3. How much can the joint be deflected?

Between 2.0° on the smallest sizes and 0.5° on the largest. The allowance reduces as diameter increases; the full schedule is under Jointing and installation. A soft soap lubricant is needed to seat the rubber ring.

4. What sizes are available?

300 mm to 1 200 mm nominal diameter in class 100D as standard. Other sizes and pipe classes can be manufactured on request.