Geomembrane Panel, Drop-In Liner and Pipe Boot Fabrication

Large panels and shaped drop-in liners

Panel fabrication starts with the material grade, thickness, plan geometry, transport limits and deployment method. Panel and seam IDs link cutting and welding records to the approved drawing. Packing is arranged to preserve identification and allow controlled unfolding on site.

Drop-in liners are shaped for the measured internal dimensions of tanks, sumps, bunds or other supported containment structures. Corner allowances, perimeter fixings, base transitions and penetrations are resolved before cutting. The substrate and structural vessel remain part of the overall containment design.

Pipe boots, connectors and interfaces

Pipe boots and collars are fabricated around the pipe outside diameter, penetration angle, liner material and restraint arrangement. The drawing distinguishes the connection to the field liner from the seal or clamp at the pipe. Movement, settlement, support and access for inspection are considered at the interface.

Custom components can include prefabricated corners, flanged connections, termination details, reinforcement patches and transition pieces. Welding compatibility is confirmed for the materials being joined; a mechanically restrained connection may be required where direct welding is unsuitable.

Production weld qualification and controls

The fabrication procedure identifies weld type, equipment, surface preparation, environmental limits, trial seams and the required inspections. Trial seams establish the working settings for the material and equipment before production, with additional checks following relevant changes.

Records can identify the operator, machine, material batch, seam reference, settings, test results and any repair. Destructive samples are taken and repaired according to the inspection plan. Test frequencies and acceptance criteria are established for the project rather than implied by a general quality statement.

Seam tests matched to the joint

ASTM D6392 is a reference for peel and shear testing of nonreinforced thermofusion geomembrane seams. Dual-track seams can be assessed by air-channel testing to ASTM D5820 where applicable; suitable accessible seams can be examined by vacuum-chamber testing to ASTM D5641. The material, seam configuration and test procedure determine applicability.

Destructive and non-destructive tests serve different purposes. A pressure hold or vacuum check does not replace seam-strength testing. The release dossier identifies inspected seams, test locations, repairs and retests, with any site completion work clearly marked.

Material selection and factory-to-site continuity

Liquid chemistry, concentration, temperature, exposure and mechanical loading determine the appropriate membrane. Potable-water duties need the approved grade. Protection layers, support conditions and leak-detection requirements are coordinated with the lining design.

Supply and installation can be included with fabrication. The site method covers substrate acceptance, deployment, final seams, pipe interfaces and the required completion tests. Factory records and site CQA records are assembled into the agreed project handover package.

Manufacturing inspection and release

Applicable methods, sampling frequencies, acceptance limits and independent testing requirements are agreed for the supplied grade and manufacturing scope.