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Reg. 512, Reg. 513, Reg.
514
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMIZER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
Constructional
Requirements
Economiser water outlet temperature |
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The design conditions shall be such that the maximum
outlet water temperature of the economiser shall be
at least 40°F below the saturated steam temperature
in the boiler drum:
Provided that this requirement shall not apply to economisers
used on low pressure water heating systems working at
pressure less than 120 ft. head of water.
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Reg. 513
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMIZER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
STEEL ECONOMISER WITH OR WITHOUT CAST IRON SLEEVES ON
THE TUBES
Tubes: Construction |
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a)
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The tubes shall
be manufactured in accordance with Regulation 151. |
| b) |
Suitable provision
shall be made for supporting horizontal tubes at one or
more intervals in their length to relieve bending stresses
and these supports as well as the end connections must
permit free expansion. |
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Reg. 514
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMIZER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
STEEL ECONOMISER WITH OR WITHOUT CAST IRON SLEEVES ON
THE TUBES
Tubes: Working Pressure |
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| The working pressure of the tubes shall
be calculated in accordance with Regulation
338(a), but
the working metal temperature shall be taken as the maximum
water temperature for which the part of the element is
designed plus 11°C (20°F). |
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