1.Pneumatic pipe fragmentation
(1)Pneumatic pipe fragmentation refers to completion of pipe replacement by internally breaking an old pipe by impact force of pneumatic hammer, extruding broken pipeline fragments to their surrounding soil layer, and pulling or jacking a new pipe or casing from the back of pneumatic hammer.
Technical advantages:
a.The pipeline can be expanded for 30%-150% increasing the discharge capacity of pipeline.
b.Such difficulties as no pipe position during the pipeline replacement and pipe replacement not allowed in special roads have been better solved.
c.Cement pipes, ceramic pipes, cast iron pipes, nodular pipes, steel pipes, thermal insulation steel pipes and asbestos pipes can be replaced. Generally, the replaced pipe diameter increases capacity by around 30% and small diameter may increase capacity to as high as 150% where appropriate.
Representative projects:
Rainwater Pipeline Replacement and Expansion Project in No. 3 Yannan Road, Qujiang New District, Xi'an; Heat Distribution Pipeline Replacement and Expansion Project in Dazhai Road, Xi'an; Heat Distribution Pipeline Expansion and Replacement Project in No. 1 Keji Road, Xi'an, etc.
2.Pressure Plugging Technology
Pipeline pressure tapping and plugging is a safe, eco-friendly, economical and efficient in-service pipe maintenance and repair technology, applicable to normal repair and reconstruction and emergency repair of pipes of crude oil, refined oil, chemical medium, natural gas and other media (such as pressure repair, replacement of corrosive pipe section, device installation, and sub-transportation reconstruction). Plugging is classified by physical and mechanical means: stopper plugging, barrel plugging, folded plugging and bag plugging.
(1)Pneumatic pipe fragmentation refers to completion of pipe replacement by internally breaking an old pipe by impact force of pneumatic hammer, extruding broken pipeline fragments to their surrounding soil layer, and pulling or jacking a new pipe or casing from the back of pneumatic hammer.
(2)Static-tension pipe fragmentation
Technical advantages:
a.The pipeline can be expanded for 30%-150% increasing the discharge capacity of pipeline.
b.Such difficulties as no pipe position during the pipeline replacement and pipe replacement not allowed in special roads have been better solved.
c.Cement pipes, ceramic pipes, cast iron pipes, nodular pipes, steel pipes, thermal insulation steel pipes and asbestos pipes can be replaced. Generally, the replaced pipe diameter increases capacity by around 30% and small diameter may increase capacity to as high as 150% where appropriate.
Representative projects:
Rainwater Pipeline Replacement and Expansion Project in No. 3 Yannan Road, Qujiang New District, Xi'an; Heat Distribution Pipeline Replacement and Expansion Project in Dazhai Road, Xi'an; Heat Distribution Pipeline Expansion and Replacement Project in No. 1 Keji Road, Xi'an, etc.
2.Pressure Plugging Technology
Pipeline pressure tapping and plugging is a safe, eco-friendly, economical and efficient in-service pipe maintenance and repair technology, applicable to normal repair and reconstruction and emergency repair of pipes of crude oil, refined oil, chemical medium, natural gas and other media (such as pressure repair, replacement of corrosive pipe section, device installation, and sub-transportation reconstruction). Plugging is classified by physical and mechanical means: stopper plugging, barrel plugging, folded plugging and bag plugging.
