Geomembrane Liner Installation and Seam Testing in Pakistan
Since 1996, Shahzada Industries has manufactured, supplied, and installed geomembrane lining systems for civil, environmental, industrial, water, agriculture, and containment projects across Pakistan.
Our end-to-end service connects material manufacturing with field installation. Shahzada teams can support project assessment, site preparation, liner deployment, thermal fusion and extrusion welding, seam testing, repairs, final inspection, and handover.
Liner Installation
Installation to Last a Lifetime
Since 1996, Shahzada Industries has provided impeccable installation service with teams of highly experienced and skilled technicians, U.S. trained site supervisors, and top tier seaming, welding, and testing equipment.
With more than 3 decades of experience in manufacturing and installing geosynthetics, we have dealt with almost all kinds of installation challenges and successfully offered solution through implementation of knowledge, experience, and empirical data. Our extensive clientele include some of Pakistan’s largest corporations across many different industries.
Our Expertise
We Know Liner and We Know it Well
Doing it Right Since 1996
With years of experience in the field, our skilled technicians, engineers and site supervisors are well-versed in the art of HDPE liner installation. We understand the unique challenges posed by different industries and tailor our approach to meet the specific demands of your project. Our team is equipped with the latest tools and technologies to ensure precise liner fabrication, testing, and installation.
Liner Seaming Methods
Thermal Fusion / Melt Bonding
Extrusion Welding
Thermal Fusion / Melt Bonding
Thermal fusion, aka Melt Bonding, is a crucial technique in the installation of HDPE liners. It involves the process of joining two HDPE sheets through controlled heating to create a strong, seamless, and impermeable connection. This method ensures that the liner functions as a unified barrier, effectively containing liquids, gases, or other materials within the containment system.
Benefits of Thermal Fusion
- Seamless Integrity
- Chemical Resistance
- Durability
- Environmental Integrity
- Strong Bonding
Extrusion Welding
Extrusion welding involves melting the edges of two HDPE sheets using a specialized extrusion welding machine. This machine combines heat and pressure to liquefy the HDPE material at the joint area. Simultaneously, a filler material, typically made from the same HDPE material as the liner, is introduced to further strengthen the connection. As the melted material cools and solidifies, it fuses the two sheets together, forming a robust bond.
Benefits of Extrusion Welding
- Strong and Secure Joints
- Chemical and Environmental Resistance
- Durability
Quality Control (Seam Testing)
Air Pressure Test
This method is tests 100% of the seam length for leaks. The (dual) weld track gap is pressurized by air injected through a needle inserted into the gap between weld tracks. The potential occurrence of leaks becomes evident through a reduction in pressure over a five-minute interval following the pressurization of the gap via manual pumping, subsequently sealed by a valve.
This approach allows for swift leak testing across lengthy seam sections, contributing to a highly efficient installation procedure. It’s important to note that following a successful pressure test, the pressure is released at the seam’s opposite end from the pump/gauge assembly, ensuring the seam’s continuity and confirming its 100% testing.
The Success of Your Project is a Direct Result of the Decision You Make!
Complete Geomembrane Supply and Installation
Shahzada provides more than liner placement. Each project is reviewed according to its application, selected geomembrane, surface conditions, geometry, access, weather, welding requirements, and testing plan.
- Project and site review: application, drawings, liner type, site access, and installation requirements.
- Material manufacturing and supply: coordination of the specified Shahzada geomembrane and compatible system components.
- Site and subgrade preparation: review and preparation of the surface before liner deployment.
- Panel layout and deployment: placement of liner panels to suit project geometry and installation sequencing.
- Seaming and detail work: hot-wedge or thermal-fusion welding for field seams and extrusion welding for suitable details, patches, and terminations.
- Seam testing and inspection: air-pressure, vacuum-box, and peel/shear testing as applicable to the seam type and project requirements.
- Repairs and retesting: identified defects are repaired and the affected area is tested again.
- Final inspection and handover: review of the installed lining system before completion.
Confirmed Geomembrane Seam-Testing Methods
Air-Pressure Testing
Air-pressure testing is used for suitable dual-track fusion seams. The enclosed channel between the parallel welds is pressurized and monitored for the specified test period. The far end is opened after the test to confirm that the tested air channel is continuous. A pressure change outside the permitted project criteria indicates that the seam requires investigation, repair, and retesting.
Vacuum-Box Testing
Vacuum-box testing is used on suitable extrusion welds, repairs, and seam areas that cannot be tested through an enclosed air channel. A leak-detection solution is applied and a transparent vacuum chamber is placed over the area. Visible bubble formation indicates a potential leak that must be marked, repaired, and tested again.
Peel and Shear Testing
Peel and shear testing evaluates the strength and quality of welded geomembrane seams. Prepared seam samples are tested to assess how the weld performs under peel and shear loading. Testing criteria and sampling requirements should follow the approved project specification and quality-control plan.
Manufacturing, Installation, and Testing Through One Team
Coordinating material manufacturing, compatible system components, site preparation, installation, welding, and testing through Shahzada reduces fragmented responsibility between separate suppliers and contractors. The project team can address material selection and installation requirements together, from the initial quotation through final testing.
Frequently Asked Questions
Does Shahzada provide both geomembrane material and installation?
Yes. Shahzada manufactures and supplies geomembrane products and provides site preparation, liner deployment, welding, seam testing, repairs, and final inspection as part of an end-to-end service.
Which geomembrane seam tests does Shahzada perform?
Shahzada performs air-pressure testing, vacuum-box testing, and peel/shear testing. The appropriate method depends on the seam type, liner material, accessible test area, and project requirements.
What information is needed for an installation quotation?
Useful information includes the project location, application, drawings and dimensions, total lining area, selected or proposed liner material and thickness, site and subgrade condition, slopes, penetrations and concrete connections, project schedule, and required testing.
Request a Geomembrane Installation Quotation
Send Shahzada your project location, drawings, application, estimated lining area, preferred liner material and thickness, site conditions, schedule, and testing requirements.
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