Insulation over tanks, columns, vessels, exchangers and equipment
Measurement shall be taken in square meter over the finished insulation surfaces. Any other unit of measurement may also be adopted if agreed between the purchaser and the applicator.
No deduction shall be made for any area required to be left uninsulated, the area of which is equivalent to a circle of 600 mm in diameter, or less.
In case of insulated nozzles,projections or manholes, such nozzle or projection or manhole is equivalent to the area to a circle of 600 mm in diameter or less than in addition to the area of such nozzle, projection, or manhole not being deducted from the insulation measurements of the tank, column, vessel, exchanger or equipment, as the case may be, the projection of such nozzle, projection or menhole, from the insulated surface around it shall be measured as pipe insulation of appropriate diameter. If the area of the nozzle, projection or manhole exceeds the area equivalent to a circle of 600 mm in diameter, then twice the actual insulated area of such nozzle, projection or manhole shall be considered for measurement and paid for as vessel insulation, after deducting the area of the tank, column vessel, exchanger or equipment covered by such nozzle, projection or manhole.
Insulated areas with different specifications shall be specified and measured separately, such as :
- Roof/tops of tanks and vessels incorporating hard setting composition and/or waterproofing layer.
- Sides of larger diameter tanks and vessels where corrugated aluminum sheets are to be used; measurements being taken over the crest of corrugated sheets.
- Insulation systems requiring special supports/structure to be provided by applicator prior to application of insulation.
- Insulation areas clad with different thickness of aluminium sheets
Insulated dished ends of vessels, columns or equipment shall be considered as twice the projected plan area of the dished ends for purpose of measurement.
Insulated equipment flanges shall be measured as prescribed in 9.3.
Any mode of measurement other than the above may also be adopted, if agreed to between the purchaser and the applicator.