Gas Pipeline Rehabilitation

Innovative Solutions with starline® Technology

We have developed specialized fabric liners, adhesives, and matching technical equipment for the following applications in gas pipe rehabilitation:

starline®HPL-G: Rehabilitation of High-Pressure Pipelines
starline®2000: Rehabilitation of supply lines
starline®200: Rehabilitation of service lines

Key steps in pipe rehabilitation using these methods include inspecting the pipeline via camera inspection, thorough cleaning, lining with the starline® fabric liner, pressure testing the rehabilitated pipeline, and, if necessary, accessing branch lines and connections using a robot from inside the pipeline.

By the way: Future maintenance and repair work can be performed using standard tools and does not require any special attachments.

starline®HPL-G

starline®2000 / starline®2000 EXPRESS

starline®200

starline® STRUCTURE-G

starline®HPL-G for Gas Transmission Pipelines

The starline®HPL-G processis used to rehabilitate high-pressure steel gas pipelines with an operating pressure of up to 30 bar using a high-strength fabric liner. Existing and future corrosion penetrations of up to 50 mm, which pose a significant risk, are efficiently, quickly, and permanently eliminated using this process.

Weld seam fracture resistance is increased. With the starline®HPLtechnology, developed specifically for the rehabilitation of transport pipelines, only a small excavation pit is required at intervals of up to 180 m for thorough cleaning of the pipeline, and installation lengths of up to 600 m are possible for the fabric liner. Since the diameter of the fabric liner is designed to match the inner diameter of the pipeline being rehabilitated, a wrinkle-free lining is achieved despite the high-strength, seamless fabric liner. Thanks to the full-surface bonding of the liner, migration is prevented, and the pipe can be drilled into later without any problems using conventional tools. It is even possible to weld on new branch lines, as the welding temperature has only a localized effect on the fabric liner.

starline®2000 and starline®EXPRESS for utility lines

This process is used in particular to permanently rehabilitate utility lines made of gray cast iron, steel, and ductile cast iron up to DN 600 and an operating pressure of up to 4 bar using a flexible fabric liner. For tight inner-city conditions, a mobile system is used that stands out for its speed, cost-effectiveness, reliability, and environmental friendliness. Combined with the innovative and globally unique starline®EXPRESS rapid curing process, service interruptions for gas customers are reduced to an absolute minimum. This technology is therefore particularly well-suited for standard pipe diameters and areas with a high density of connections. Within a single workday, sections of the pipeline are isolated, inspected, cleaned, rehabilitated, tested, branch connections opened without excavation, and the line returned to service. This eliminates the need for costly temporary supply measures and permanently restores the necessary operational safety within just one day. Since the special adhesive system cures without heating the entire pipeline, harmful thermal residual stresses within the pipe body are prevented.

starline®200 for gas service lines

The starline®200 methodis a durable rehabilitation technology for service lines in gas distribution systems, featuring a specially designed fabric liner and a corresponding installation technique. This method is used to rehabilitate steel service lines with diameters ranging from DN 20 to DN 65, lengths up to 60 m, and—depending on the dimensions—up to five 90° bends.

The key advantage of this method is that, depending on the dimensions, up to five 90° bends can be lined with virtually no creases and with complete coverage across the entire surface. This is made possible by a specially developed hose system featuring a unique weave and coating. The entire process sequence and the specialized process technology—including a very lightweight manual pressure drum—ensure that the customer’s gas supply is restored within a few hours. Depending on local conditions, this allows for the rehabilitation of more than one connection per workday. Typically, this requires only a small excavation at the supply line.

Rehabilitation of gas pipelines up to DN 600 at 30 bar

Innovative Solutions with starline® Technology

starline®HPL-G for Gas Transmission Pipelines