A legacy of quality and trust

A legacy

of quality and trust

Formed in 2004, the Southern African Plastic Pipe Manufacturers Association (SAPPMA) is committed to advancing the benefits of high-quality plastic pipe systems. IMIESA talks to CEO Jan Venter about key trends since the first products started to become available in the 1960s.

What are some of the major R&D milestones?

JV There are many, of which the following are of great significance: − The quality of polymers has increased greatly. In HDPE, the popular pipe grade has gone from PE 50 to

PE 100. This has resulted in an increase in design stress and a consequent reduction in design wall thickness, which in turn has meant a reduction in cost. Furthermore, it enabled the extrusion of much larger diameters than before. More recently, solid-wall HDPE of 3 500 mm in diameter has been achieved. − In the PVC arena, the development of OPVC is of great significance, enabling higher pressure capability in large diameters. − Similar improvements have been made in equipment. The output of extruders has greatly improved, with better-designed screws and extrusion heads, and electronic control systems.

An output of 2 000 kg per hour is not unusual anymore, which creates quite a logistical challenge!

How has SAPPMA helped to change perceptions about plastic pipe?

For the past 16 years, SAPPMA has been promoting the benefits and use of plastic pipe. This has been done through personal contact with design engineers and contractors, as well as making available useful and objective design information. We’ve been constantly familiarising the market with these materials.

How does South Africa compare with the world in terms of plastic pipe specifications?

Pipe specifications in South Africa are based on ISO standards and hence on par with most developed countries. Theoretically, the quality of a specific pipe in South Africa should be equivalent to one made in Europe. Where we fall short is in terms of production volumes and hence profitability. In turn, this has a negative effect on capital expenditure.

Are there any limitations when it comes to infrastructure services?

I’m not aware of any limitation in terms of product range. Our limitation is linked to the lack of required expenditure in water and sewage systems.

Do engineers understand the benefits of plastic pipe?

Generally, yes; however, there remains a gap in the curricula of engineering students in terms of plastic pipe materials. We have recently engaged with the Department of Civil Engineering at the University of Pretoria by providing some basic technical info, to be presented to third-year students.

Can plastic pipes be recycled and reused?

Indeed yes, and it is done to a great extent, given the high price of polymers.

Are some plastics superior to others?

Horses for courses: the two most popular materials in South Africa are HDPE and PVC, each of which fulfils very specific needs.

What assurances do specifiers have?

If the design of the pipeline is correct, and if the specifiers ensure their tender documents cover the required product standards, the certification of the manufacturer and an acceptable quality assurance plan, they can rest assured the product will meet the design life, which can easily exceed 50 years.

What are SAPPMA’s plans for 2021?

Much of the same – with a focus on product standards, quality, technical

information, marketing and training. We will continue to interact with all role players in this crucial industry and fulfil a much-needed role of watchdog and coordinator.

Jan Venter, CEO, SAPPMA