# Construction and repair

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## Product description

Practical work 1. Determination of the wall thickness of the pipeline

Purpose of work: Determination of the wall thickness of the pipe section of the main pipeline with an outer diameter of Dn.
Initial data:
category of land - B,
internal pressure - p = 5.0 MPa,
pipe wall temperature during operation - te = 4ºС,
fixation temperature of the design scheme of the pipeline - tf = -33ºС,
reliability coefficient for pipe material - k1 = 1.4
reliability coefficient for the load - the internal working pressure in the pipeline n = 1,1,
working pressure p = 5.0 MPa
the outer diameter of the pipe Dn = 530 mm
standard resistance to tensile (compression) of the pipe metal, is taken equal to the ultimate strength вр = 510 MPa
coefficient of pipeline operating conditions m = 0.75
reliability coefficient for the purpose of the pipeline kн = 1
reliability coefficient for load - internal working pressure in the pipeline n = 1,1
Physical characteristics of steel α = 1.2 · 10-5, E = 2.06 · 105, μ = 0.3
Practical work №2
Determining the step of the placement of goods during installation
waterlogged pipelines

Purpose of work: Calculate the spacing of reinforced concrete or cast-iron cargoes when laying a pipeline through a swamp. The initial data for the calculation: the outer diameter of the pipe - Dн, wall thickness, type of cargo, its mass and dimensions.