Hamid Alipoorian - Master of Civil Engineering, Shahid Beheshti University, Tehran
Abolfazl Keshtkar - Master of Political Geography, Islamic Azad University, Garmsar
Payam Soltan Sanjari - Master of Civil Engineering, Amirkabir University, Tehran
Pooriya Amirkhalily - Bachelor of Civil Engineering, Islamic Azad University, Semnan

In pipelines it is frequently necessary to position one or more pipes carrying a linemedium within a rigid outer casing. This carrier pipe within an outer casing arrangementis frequently provided for water and sewer mains within highway and railroad crossingpipe casings to maintain carrier pipe alignment, restrain the carrier pipe against floatationor other movement, or maintain the carrier pipe in a fixed position and orientation such asper grade requirements in the case of a gravity sewer. Casing spacers are for fixing pipesposition, isolating carrier pipe mechanically, and chemically from pipe casings. A casingspacer includes first and second elongated, steel shell members comprised of stainlesssteel or high strength steel with corrosion inhibiting coatings, with each shell memberhaving a semi-circular cross section for engaging and enclosing a carrier pipe within anouter casing. In this paper, the loading capacity of casing spacers in different types ofcarrier pipelines is calculated. As a case stay, the Qatar world cup championship stadiumsinfrastructure projects are evaluated. The result shows, the stainless-steel casing spacersloading capacity that used in mentioned projects are much more than the pipelinesweight.

Pipeline, Casing Spacer, pipe installation, loading Capacity