Razan Technical Tight 20 Inch Transmission Line Project


Razan Technical Tight 20 Inch Transmission Line Project


Construction of a 20-inch gas transmission line

Project size

Construction of a 20-inch gas transmission line with an approximate length of 75 km


Iran Gas Engineering and Development Company

Year of implementation


Project description

Execution work related to the complete installation of about 75 km of 20-inch gas transmission pipelines

Carrying out civil and structural works such as drilling to prepare canals and leveling the runway of construction operations in the places required for trench correction

Construction of technical buildings, embankments, slope correction, construction and installation of concrete weights, technical buildings required for concrete or stone, including bridges, water features, retaining walls and guarantors according to drawings and technical specifications

Construction of a canal in the axis of the pipeline route based on drawings

Perform welding of pipes and fittings and radiography of welded

Delivery of load in transporting pipes and fittings is the responsibility of the employer to the necessary points in the piping route

Cleaning the outer surface of parts without pipe cover according to SHOT BLAST or CRIT BLAST method

Hot tubing in a fixed workshop, welding welds, fittings for side accessories to the system with a tape cover for the worker

Align the pipes along the channel along the path to the thickness of the pipes at the points shown in the route maps.

Bend pipes at required points

Repairing the cover of pipes whose cover has been damaged for any reason and insulating all pipes and fodder connections inside the stations

Laying the pipe on the trench floor and on a bed of soft sand or aerated sand

Pour soft screened soil or aerated sand on the pipes or increase hand soils caused by digging a trench to fill the trench and create fish dust on the canal

Installation of pipe markings and measuring points of cathodic protection potential according to the map along the path

Cleaning the route and transporting excess soils from canal digging

Carrying out the necessary operations to pass pipes through rivers, aqueducts .... Plastic and concrete cover

Carrying out operations to cross underground obstacles such as pipes, telephone cables ...

Perform operations to cross the pipe through main and secondary roads

Performing hydrostatic pressure test of transmission line and stations

Covering all underground installations and painting installations on the ground

Mapping the route of the line after its construction and drawing ASBUILT drawings for the approval of the supervising engineer