Are there any reservations regarding the establishment of boundary conditions in the construction of new facilities and technological upgrades?
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As the title suggests: When installing new units or carrying out technical upgrades to existing units, it is necessary to specify clear boundary conditions for the general contractor. These conditions include: boundary steam pressure, boundary gas pressure, boundary circulating water pressure (supply and return), pressure of purified and unpurified air at the boundaries, pressure of medium-pressure and low-pressure nitrogen at the boundaries, pressure of heat transfer water at the boundaries (supply and return), pressure of heating water at the boundaries, and so on... However, since these boundary conditions are bound to change after the unit starts operating, will people be cautious when specifying them? Otherwise, it will be difficult to resolve disputes through litigation; if the boundary condition for the circulating water is 0.45 MPa (for feedwater), then the value to be provided to the design institute should be 0.4 MPa
The final content must take precedence
It is necessary to meet the boundary conditions specified in the design; otherwise, the design agency will surely raise objections, arguing that the provided conditions are not suitable and that it is not a design issue. The amount reserved should not be excessive, as having too much excess can also cause problems when pressure is applied.
The original poster: It shouldn’t really be called a reservation; in my opinion, \"deviation\" is a more appropriate term. For the boundary conditions of utility systems in new installations, the design parameters for those utilities are determined during the foundation design phase. As for the area surrounding the new installation, there will be deviations, but they won’t be very significant. For the installation of new equipment in existing plants or the renovation of existing equipment, the design of the plant’s utility systems is fully used as a reference, and the actual conditions are communicated to the relevant party; although there are differences between the two, the deviation is not significant.