![]() The steam main will be operating at a higher temperature than that of the condensate main, and the two connection points will move relative to each other during system warm-up. Here, the difference between the expansions of the two pipework systems must be taken into account. In other installations, however, it will be necessary to incorporate some means of achieving this required flexibility.Īn example on a typical steam system is the discharge of condensate from a steam mains drain trap into the condensate return line that runs along the steam line (image below). In many cases the flexibility of the pipework system, due to the length of the pipe and number of bends and supports, means that no undue stresses are imposed. The pipework system must be sufficiently flexible to accommodate the movements of the components as they expand. More detailed information about allowance for expansion is given at the International website of This will create stress upon certain areas within the distribution system, such as pipe joints, which, in the extreme, could fracture. It follows that they expand, especially in length, with an increase from ambient to working temperatures. Pipes carrying hot fluids such as water or steam operate at higher temperatures. Steam System Expansion Pipe expansion and supportĪny steam system must be fully supported, able to expand during operation and sufficiently flexible to allow movement as a result.Īllowance for expansion All pipes will be installed at ambient temperature. ![]()
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