Sekisui Expands Product Line-Up

October 2010 Vol. 65 No. 10
  • SPR is a spiral wound trenchless pipeline renewal process designed for rehabilitation of circular and non-circular pipelines ranging from 18-144 inches and larger. SPR utilizes a steel-reinforced, monolithic, interlocking PVC profile strip that is grouted in place with a manufacturer’s specified cementitious grout. SPR has the capability to negotiate bends and rehabilitate odd shaped pipelines because of the adaptability of the profile;
  • SPR PE is a steel-embedded, reinforced HDPE spiral pipe liner with a smooth internal surface. The liner is introduced at a fixed diameter and then the annular space is grouted. It is designed for use in pipes from 36 to 120 inches in diameter. The plastic profile that forms the liner is reinforced with steel that is fully encapsulated within the HDPE material. SPE PE is only introduced back in to the host pipe as a circular pipe. It can be wound into odd shapes as long as a circular pipe can be installed;
  • SPR EX can rehabilitate pipelines ranging from six to 30 inches. A range of standard PVC profiles is available. The appropriate profile is selected to provide a liner with sufficient stiffness to meet individual project design requirements. SPR EX is spirally wound into the host pipe at a fixed diameter. When the liner reaches the opposite manhole, it is fixed in place, and then expanded tight against the host pipe. SPR EX is unique because grouting is not required.

“All Sekisui SPR products can be installed without the requirement for chemicals that are potentially harmful to the environment,” Vaccaro said. “The grout we use is a cementitious grout. All three technologies are truly trenchless, and only require a manhole as an access point. They can be installed with minimal flow in the pipe, in some cases avoiding costly bypassing. All three processes offer a 100-percent structural design for the owner.”

Sekisui Chemical Co., LTD. Osaka, Japan, is the parent company of Sekisui SPR Americas.

Vaccaro said SPR EX and SPR PE were previously known in North America as Rib Loc Expanda and Ribline. Sekisui Chemical Co. LTD. purchased the Rib Loc company and products and markets them in North America under the name Sekisui SPR EX and SPR PE. Along with SPR, the three products have been used in the U.S. for gravity sewer and storm water pipelines.

“Adding the static SPR process rounds out the complete line of rehabilitation methods for Sekisui SPR Americas which markets them directly to contractors and system owners,” said Vaccaro. “The static SPR winding machines are available now, and several projects already have been completed with them.