Ultracor PVC-U Multi-layer Sewer & Drain SANS 1601

Ultracor has smooth inner and outer walls separated by a dense cellular foam core. The multi-layer construction is engineered to deliver all the expected attributes of a world class sewer pipe.

• A smooth inner wall for optimal flow and lower cost
• A smooth outer wall which makes the product compatible with all SABS joining systems
• Low pipe mass that contributes to competitive pricing and economic use
• Ultracor carries the SABS 1601:mark of approval

Pipe Stiffness
The introduction of structured wall pipes to the South African market led to the preparation of the SANS 1601 specification. This introduced the concept of the pipe stiffness rating as a pipe classification. The use of kPa rating (100, 200 and 400 kPa) is often confused with the pressure class rating, but in fact relates to the amount of pressure to deform the pipe by 5% of its diameter.
The solid wall specification (SANS 791) has two pipe stiffness classes being class 51 (normal duty) and class 34 (heavy duty). These relate to 100 kPa and 300 kPa respectively (see below table).
From the table we see that a SANS 1601 structured wall 400kPa pipe has a greater pipe stiffness than a SANS 791 solid wall heavy duty Class 34 pipe.