Frequently Asked Questions

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Ask any HDPE or pipe related question and we will attempt to answer.

We have attempted to gather some of the most frequent questions that we are asked. If you have any further questions, please ask us!

What is the difference between HDPE and LDPE pipe?

  • HDPE = High Density Polyethylene. When ordering PE100 pipes customers usually provides the Outside Diameter (OD), Standard Dimension Ration (SDR) and/or Pressure Nominal Rating (PN). Uses fittings based on the Outside Diameter. Fittings generally used are compression fittings (screw-on fittings), electro-fusion fittings, fabricated fittings and stubs. Used for high pressure lines such as boreholes and fire hydrant lines.
  • LDPE = Low Density Polyethylene. Dimensions based on the Inside Diameter (ID). Fittings presses into the pipe. Used for low pressure lines such as irrigation. PipeFlo does not manufacture LDPE pipes, but can supply at competitive rates.

How do I know what bar pressure the pipe should be?

It is important to remember every 10m decent or ascend in the water line adds 1 bar pressure to the line – if your borehole is 100m and at a Head height of 30m you will require at least a 16bar pipe due to the 13bar added pressure to the line excluding the bar presser the pump in the borehole pumps at.

Contact us for your pipeline design considerations, we can assist.

How do I connect the pipes?

There are a few ways of connecting the pipes, namely:

  • Compression fittings – sizes 16mm to 110mm, up to specific pressure ratings
  • Stubs and flanges – usually size 50mm till 450mm
  • Butt-welding – all sizes
  • Electro fusion – all sizes

Please feel free to contact PipeFlo should you require more information about the different connection types.

Why can't you coil a class 6 pipe?

Due to the evolution of material quality from PE63 to PE100, the pipe no longer needs a very thick wall thickness for the pressure it was designed for. Class 6 and Class 8 pipe`s wall thickness is usually too thin to coil without bending the pipes during manufacture, storage and/or transportation.

Can the pipe be used for Sewerage?

Yes, the pressure will just have to be confirmed.

Do you sell to the public?

Yes, everyone is welcome to buy from us!

What lengths do you sell?

Our pipes are manufactured in standard lengths 6/9/12 m lengths or coils of 50/100/200/300m depending on their Outside Diameter and PN rating.

We can also manufacture pipes to your requirements, but applications and transportation should also be considered.

Do you have another branch?

We sell directly from our factory in Koedoespoort Industrial in Pretoria.

How do you connect UPVC to HDPE?

Converting coupler, also known as a flange adapter. The fitting has a UPVC connection on one side and a galvanize flange on the other. You will have to stub and flange the HDPE pipe with the same flange as the Flange adapter and then you can bolt and nut the two flanges together.

Do you deliver?

Yes, we do deliver countrywide. We have a fleet of trucks and weekly routes. Please contact our office to confirm delivery prices.

We can also refer you to reputable pipe transporters should you want to arrange your own transport.

Do you Export?

We can assist with export documentation as we do have a exporters code, but the customer will have to arrange his/her own transport.

Does your pipe have a coloured line?

No, our pipes are uniform black. All our pipes are printed with OD, SDR and PN values and batch numbers. The batch numbers enables us to have full traceability from raw material to final customer.

Can your pipe be used for air or gas?

Our HDPE pipes certified with SANS4427-2:2008 which is designed for pipes and fittings for water supply.

Can your pipe be used for warm water?

Our HDPE pipe`s bar pressure is only certified up to 20°C. Higher temperatures  will reduce the pressure the pipe can handle. Contact us for assistance.

What are the properties of HDPE?

  • Black appearance and a waxy surface feel.
  • Little to no stress cracking.
  • No inside encrustations or build-up of materials.
  • Internally and externally resistant to corrosion.
  • Non-toxic and has a high impact- and chemical resistance.
  • HDPE ignites on contact with a flame and continues to burn with the removal of the flame.
  • HDPE forms no corrosive gasses /residues when burned.

Let PipeFlo help you with your HDPE Pipe needs