What is a MPSP pipe?

A Multiple Pass Sleeve Port (MPSP) Pipe is manufactured for the underground transportation of grout, liquids, or other substances. The transportation of grout down a drilled bore hole, known as “curtain grouting”, can be used in a multitude of applications including the establishment of an underground barrier or strengthening of foundations to increase structural load.

A MPSP is a long, smooth pipe, with carefully spaced drilled holes, referred to as ‘ports’, along the tube. These ports can be drilled at any desired diameter and location down the pipe. A rubber sleeve is placed over the ports, acting as a non-return pressure valve for the substance or grout being pumped through the pipe. This pressure valve enables the adequate dispersion of the substance. 

A reinforced Nylon bag or packer bag can also be placed on the pipe, so when inflated with cement a blockage is created, isolating segments down the hole. Steel clamps are primarily used to secure the bags to the pipe. The material of the bag must have a certain permeability, as it requires water to seep out of the cement, therefore promoting a high early strength and nil possibility of bag shrinkage post inflation. With the correct size of nylon bag, inflation can be done to any diameter required.

What are MPSP pipes used for?

Grouting of underground land as well as fissured or granulated rock can be conducted through an upstage or downstage grouting method. Armstrong Energy specialises in manufacturing pipes for “upstage grouting”. This is where a hole is drilled, and the injection of grout is injected progressively from the bottom upwards by a down the hole packer system. The advantages of upstage grouting include the ability to drill in one pass, ease of grouting, limited material waste, and often cheaper.

What materials are used for MPSP pipes?

The commonly used pipe material is PVC due to its cost effectiveness and availability. Alternatively, stainless steel or extruded plastics can be manufactured to suit. Pipes can be supplied in lengths up to 6m, otherwise machined to specification in our local machine workshop. 

Where are MPSP pipes machined?

All machining and assembly of the MPSP pipes is completed at one of AE’s machining centres in Western Australia, providing a local and cost-effective solution for our customers.

How do I find out more information on MPSP pipes?

To find out more information on MPSP pipes, contact AE at [email protected] or (08) 9361 2272.