Durodrain Solid Wall Sewer and Drain Pipe
PVC-U (unplasticised polyvinyl chloride) is selected as a pipe material internationally because of its excellent performance characteristics:
- Resistance to abrasion and scouring.
- Resistance to attack from acid or alkaline soils.
- Impervious to chemicals found in all sewerage.
- Good flow characteristics.
- Not damaged by modern cleaning methods.
- Good impact properties, an important factor in installation, transportation and use.
Specifications are written to ensure that products perform the way that they were designed. The correct use of products that comply with recognised specifications will save unnecessary expense when remedial work is carried out due to failure or rejection by the authorities.
ISO 9001 - SUSTAINED QUALITY
DPI Plastics' two manufacturing sites in South Africa have the ISO 9001 accreditation demonstrating the company's intent and capability as a supplier of world class plastic pipe and fitting systems.
DPI Plastics' quality policy is relevant to its organizational goals and the expectations and needs of its customers.
Class 51 Solid Wall (normal duty) Pipe - 100 kPa pipe stiffness
|Pipe ends||Minimum wall
|110||4 & 6||plain end||2.2||1.143||U110/4,01 &||U110/6,01|
|160||4 & 6||plain end||3.2||2.514||SE160/4,01 &||SE160/6,01|
|200||4 & 6||integral joint||3.9||3.802||SE200/4,01 &||SE200/6,01|
The introduction of structured wall pipes to 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 100kPa and 300kPa respectively.
|SANS Specification||Normal Duty||Medium Duty||Heavy Duty|
|class||stiffness kPa||class||stiffness kPa||class||stiffness kPa|
Class 34 Solid Wall (heavy duty) Pipe - 300 kPa pipe stiffness
|110||4 & 6||plain end||3.0||1.546||U110/4HD,01 &||U110/6HD,01|
|160||4 & 6||plain end||4.7||3.665||SE160/4HD,01 &||SE160/6HD,01|
|200||4 & 6||plain end||5.9||5.633||SE200/4HD,01 &||SE200/6HD,01|