Casing
pipes are used for casing for oil and gas wells. Steel casing pipes and
tubing are applied to furnishing and installing cased tunnels, where
they indicate to pass other utilities or obstructions without open
excavation. Steel casing pipes and tube have smooth wall and a minimum
yield strength of 35,000 psi. Corrosion-proofing water-based paint is
applied on the outside pipe surface to protect against atmospheric
corrosion during transportation and storage. The pipes can be delivered
with metal or composite caps at both ends for thread protection.
Casing pipes are manufactured out of steel are smelted in the electric
furnace, treated with synthetic slags and cast by continuous casters.
The applied steel making process ensures the achievement of chemically
pure steel with reference to sulphur and phosphor contents providing
high tensile, ductility and corrosion resistance properties of pipes to
be operated at low temperatures in various corrosion media. Pipes are
heat-treated in a computerized walking beam furnace. Steel grades and
heat treatment regimes applied allow high-strength pipe to be obtained.
