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Trenching

HDPE Pipe technical guidance (High quality Polyethylene Pipes)
 

Are there any special trenching requirements advised by our customers for PE pipe?

No special trenching requirements are normally needed for PE compared to other materials and the preparation of trenches should follow national or local practices. Sharp stones should be removed from the base of the trench and where laying the pipe across rock or granular soil of angular consistency, such as gravel or cobbles, the trench should be excavated below the required depth to allow the pipe to be laid on imported compacted backfill. It is advisable that PE pipe be surrounded by good...

Are there any limitations on the depth at which PE pipe can be laid?

There are normally no depth limitations related to PE pipe material. The depth limitation to which PE pipe can be laid is not governed by the material properties but by the site conditions, soil type, level of water table, etc. This is no different from other pipe materials. The pipe should be designed to resist any additional forces from soil loading associated with deep excavations. Suitable precautions should be taken to prevent collapse of the trench walls for deep excavations and...

Is trench alignment critical when laying PE pipe?

No. The flexibility of PE allows it to be placed with some variations in alignment to suit local terrain if necessary. The alignment of the trench in the vertical plane is dependant on the application for which the pipe is being used. For example, gas and water PE distribution mains can be laid to follow the contours of the ground beneath which the pipe is being laid. PE gravity sewers, however, should be laid to the specified gradient to ensure their correct hydraulic function. In the...

Can PE pipe normally be installed by trenchless methods or methods using minimum excavation?

Yes. PE pipe is ideally suited to installation by trenchless or minimum excavation techniques and many of the common methods were initially developed for PE. The techniques used by installers that routinely use PE are: Pipe Bursting or Pipe Splitting This technique involves using a device which passes through the existing pipe and breaks it, forcing the fragments into the surrounding soil. The replacement PE pipe is pulled through behind the pipe bursting device. For the replacement of brittle...


Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKazanorgsintez PJSCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE

Top articles

Why choose PE compounds for pressure pipe ?

Simplicity or consistency The simplest way for any polymer producer to operate is to produce natural pellets for a wide range of applications...

Quality Materials List

PE100+ Quality Materials List is valid until December 2022. It is available online and a PDF version can be downloaded.

What range of pipe diameters is available?

PE100 can be manufactured in a wide range of polyethylene pipe diameters from 16mm to 2000mm. Even larger diameters are possible with the development...

What is SDR pipe and how does it influence the pressure rating of the pipe?

SDR pipe : "Standard Dimensional Ratio" The SDR pipe is the "Standard Dimensional Ratio" and refers to the geometry of the pipe. SDR is defined as...

Testing methods

Creep rupture strength - Internal pressure test Constant internal pressure at constant temperature The internal pressure test is standardised in ISO...

Pipe Bursting and Splitting

PIPE BURSTING / SPLITTING - TECHNIQUE Pipe bursting and pipe splitting are trenchless methods used to replace existing pipelines with PE100 in the...

Pipe Reaming

PIPE REAMING - TECHNIQUE Pipe reaming, also known as pipe eating, is a trenchless pipe replacement technique that removes the host pipe while at the...

Test Requirements

Requirements of the PE 100+ Association Firstly, the ready made compounds must conform to EN 1555-1 and ISO 4437, or EN 12201-1 and ISO 4427. Fully...

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