Why Choose HDPE Geomembrane Liners for Engineering Leak Control

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Why Choose HDPE Geomembrane Liners for Engineering Leak Control

Jan 03, 2020

As a new type of impervious material, HDPE geomembrane liners has been increasingly utilized to a large number of projects. Ordinary utilization projects are included landfills, sewage treatment plants, canals lining,  reservoirs, chemical plants subgrade lining, fuel refineries foundation and oil tanks lining, etc.

Why do so many fields choose HDPE geomembrane liners as an impermeable material?
1.High cost performance of HDPE geomembrane liners
Compared with other impervious materials, the cost of HDPE geomembrane liners is low, equivalent to 20-30% of the cost of other impervious materials. For some small aquaculture enterprises, it is affordable; for large engineering enterprises, bulk purchases are more favorable.

2. Long service life of HDPE geomembrane liners
HDPE geomembrane liners has stable properties. High-quality HDPE geomembrane liners service life is up to 80 years without sunshin exposure. Impervious treatment of a large number of projects reduces the investment cost of enterprises.

3. HDPE geomembrane liners imperviousness feature and other excellent features
HDPE geomembrane liners are mainly used for anti-seepage treatment, and in the meantime it also plays a role of separation, protection, reinforcement and drainage.

4. Stable in tough environment impact
HDPE geomembrane liners have good performance in cold and high temperature.

Tips for HDPE geomembrane liners installation
1. Subgrade Preparation and Maintenance
Before the installation of HDPE geomembrane liners, the subgrade should be tamped, and there must be no uneven areas. Please check for sharp edges, embedded rocks, or other
foreign objects that may damage the HDPE geomembrane liners.

2. Placing HDPE geomembrane liners
Before placing HDPE geomembrane liners, it is firstly necessary to check whether the membrane is intact, whether there are any defects such as damage, rotten holes, etc. The anti-seepage HDPE geomembrane liners should be cut according to the onsite designed specifications. During the entire placing process, the HDPE geomembrane liners is not suitable for being pulled too tightly, and necessary flexible quantity must be reserved to save raw materials. 

3. Welding of impervious HDPE geomembrane liners
There should be no dust or mud stains at the interface between membranes. It must be cleaned and tidy before welding. Welding impervious HDPE geomembrane liners requires professional welding technicians, and the welding tool can be chosen a dual-track hot-melt welding machine.
Generally, the welding procedure is as follows: adjusting working pressure-setting temperature-design solution rate-checking the welding bar -putting HDPE geomembrane liners into feeding machine-power the welding machine. In the whole process of electric welding, we must keep an eye on the operation of the automatic welding machine anytime, anywhere.
HDPE geomembrane liners
HDPE geomembrane liners installation by extrusion welder

4. Anchoring of HDPE geomembrane liners
There are several ways of anchoring HDPE geomembrane liners, such as nailing bullet and steel bar anchoring, expansion screw and steel bar anchoring, plus pipe trench and steel bar anchoring. The applied anchoring way can be chosen based on onsite situation.
HDPE geomembrane liners
Nailing bullet and steel iron bar anchoring for hdpe geomembrane liners

5. Appearance inspection, non-destructive and destructive testing for HDPE geomembrane liners seaming
After all the work is completed, an inspection of anti-seepage HDPE geomembrane liners should be carried out. The new items to be inspected include appearance, welding seam, and surrounding environment.  Besides of assessing and inspecting the appearance, pressure tests and standard air pressure tests must also be performed on the welded joints of the impervious HDPE geomembrane liners. Finally, seam tensile strength test should be carried out, which should be cut out a part to be tested.