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Aboveground storage tank liners for energy applications
June 1st, 2022
FIGURE 1 Wooden oil tank near Odessa, Texas. Photograph courtesy of the author Over the past 20 years, hydraulic fracking rules and regulations have become increasingly stringent, and oil and gas (O&G) producers have become progressively more concerned with environmental stewardship. Quality, factory-fabricated geomembrane liners for the aboveground storage tank (AST) market have become a […]
Eric Blond nominated chairman of ASTM D35.10 Subcommittee on Geomembranes
May 12th, 2022
Photo courtesy of Eric Blond. Eric Blond has been nominated chairman of the American Society for Testing and Materials (ASTM) Subcommittee D35.10 on Geomembranes. The ASTM Subcommittee D35.10 develops standard test methods, specifications, guides and practices dealing with geomembranes. ASTM International is one of the world's largest international standards developing organizations and is considered a […]
Your extrusion welding rod matters
May 3rd, 2022
Solmax discusses why choosing your extrusion welding rod matters, and the best ways to perform an extrusion weld on a geomembrane. Circular geomembrane extrusion weld. Photograph courtesy of Solmax Extrusion welding is a highly effective seaming method that’s primarily used for detailed patching work on polymeric geomembranes such as high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE). It also works well […]
Landfill closure best practices
April 19th, 2022
AGRU America Inc. explores landfill closure regulations and requirements, highlighting landfill closure best practices from the perspective of a geosynthetics manufacturer. In partnership with Watershed Geosynthetics LLC, AGRU America Inc. has manufactured more than 1,500 acres (607 ha) of ClosureTurf engineered landfill closure systems. Photograph courtesy of AGRU America Inc. Landfill containment is a complicated […]
Inspecting a six-year-old geomembrane
April 14th, 2022
Seaman Corp. describes a rare opportunity for inspecting a 6-year-old geomembrane at the Knoxville, Tenn., World’s Fair Park. By Felon Wilson, Industrial Fabrics Business Director, Seaman Corp. WFP Park and lake in Knoxville, Tenn. Photograph courtesy of Seaman Corp. The lake at the Knoxville, Tenn., 1982 World’s Fair Park was relined with the XR-5 geomembrane in […]
Selecting a textured geomembrane
April 11th, 2022
Solmax makes the case for selecting a textured geomembrane, like the company’s FrictionFlex, based on the type of application. By Aparna Jayakumar, Technical Manager, EMEA, Solmax Textured geomembrane. Photograph courtesy of Solmax Choosing a textured geomembrane largely depends upon the type of application in which the geomembrane is being used. The amount of interface friction […]
Welding HDPE geomembranes with biogas present
April 1st, 2022
Q: We are a Brazilian company specializing in biogas plants. We have built a big lagoon biodigester with a high-density polyethylene (HDPE) geomembrane cover. Now the cover is leaking liquid contained in the lagoon: We are organizing the repair procedure, and we would like to first investigate state-of-art practices and procedures for welding HDPE geomembranes […]
NSF 61-certified HDPE geomembranes
April 1st, 2022
Q: Hi, we are looking for options for NSF 61-certified high-density polyethylene (HDPE) liners for installation in a potable water tank, 95th-percentile concentration of free chlorine in the tank is 1.2 ppm (1.2 mg/L). The current liner (60-mil [1.5-mm] textured HDPE, installed in 1999) is damaged and needs to be repaired or replaced. We are […]
Methane gas geomembrane permeability
April 1st, 2022
Q: What is the least permeable geomembrane to methane gas? Regarding the permeability of geomembranes to methane gas, could you send me some technical guidelines? A: High-density polyethylene (HDPE) geomembranes are denser (more crystalline) than linear low-density polyethylene (LLDPE) geomembranes and less permeable. The water vapor, solvent and methane transmission (diffusion) of an HDPE barrier […]
Scratch impact on HDPE liners
April 1st, 2022
Q: I have a project where multiple and extensive scratches were created on the high-density polyethylene (HDPE) liner for a reservoir due to poor construction practices. (See the following Figures 2–4.) FIGURE 2 Construction equipment that caused scratches at crest of slope FIGURE 3 Overview of scratches in 60-mil (1.5-mm) high-density polyethylene (HDPE) conductive liner […]