Distance between pipe supports

Calculation of spans between movable supports of pipelines

DN - The diameter of the pipeline
Maximum temperature of water or steam
Maximum water or steam pressure
Laying method
Type of compensators

Distance between pipe supports is chosen based on the strength and deflection calculations, which depend on the pipeline's laying method, hot water parameters, and pipeline diameter. This program uses tabular data from the designer's handbook 'Design of Heat Networks,' edited by A.A. Nikolaev.

The program calculates the following distances between movable pipeline supports:

  • Maximum span based on strength calculation on straight sections
  • Maximum span based on deflection on straight sections
  • Recommended distance between pipe supports on straight sections
  • Distance between pipeline supports in areas adjacent to compensators and bends

The locations of fixed pipeline supports depend on the schematic features of heat networks. Fixed supports are typically installed in pipeline branches, near shut-off fittings, and on straight sections based on the compensating capacity of compensators and self-compensating sections.

Restrictions During Calculation

  • The pipeline is made of steel pipe according to the 'Assortment for Heating Networks.'
  • The pipeline is filled with water or steam.
  • The slope of the pipeline is i=0.002.
  • The pipeline has no additional loads.

Choice of Movable Support

The following types of movable supports are used in heat networks:

  • Sliding supports
  • Roller supports
  • Suspended supports

Sliding supports are used for pipelines with diameters from DN25 to DN150 and for all heat network laying methods. For pipes with a diameter of DN200-1200 mm, sliding supports are used when laying in non-passable and semi-passable channels, as well as for the lower row of pipes in tunnels.

Roller supports are used for pipelines with diameters greater than DN200 when laying pipelines on low and high free-standing supports, along the walls of buildings, and in tunnels on frames and brackets. Roller supports are not used during the laying of pipelines in impassable channels.

When laying pipelines above ground on overpasses with a span structure, both sliding and roller supports are used for conventional pipe passages with DN>200 mm. Roller supports are installed in the event that the use of sliding supports leads to the aggravation of the purlins.

Suspended supports are used for overhead laying on overpasses with stretchers, when hanging pipes, in self-compensation areas, or when installing U-shaped compensators. When using U-shaped compensators, it is recommended to install guide supports at a distance of 40*DN. Suspended supports cannot be installed in areas of pipeline laying without ducts.

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