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Reg. 502, Reg. 503, Reg. 504
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMISER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
ECONOMISERS
Modification of formula |
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Where no certificates are produced, the working pressure
as found by formula will be reduced by 10%. When the
workmanship is, however, in any way doubtful and the
Chief Inspector is not satisfied that any of the foregoing
conditions would be sufficient to meet the circumstances
he may at his discretion reduce the working pressure
by such percentage as he deems fit.
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Reg. 503
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMISER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
ECONOMISERS
Maker’s Certificates for Steel Economisers |
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The Maker shall furnish the Inspecting Officer with
a certificate in the following form:-
“We hereby certify that the material described
below has been made by the Open Hearth or an Electric
process acid/basic and has been satisfactorily tested
in the presence of the Inspecting Officer/our Test House
Manager in accordance with the Standard Tests.”
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Reg. 504
STANDARD CONDITIONS FOR THE DESIGN AND CONSTGRUCTION
OF ECONOMISER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
ECONOMISERS
Hydraulic test for new economisers |
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For all new economisers the hydraulic test must be
applied as shown below:-
On Components before assembly
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Design pressure lbs/sq. in.
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Hydraulic test pressure lbs./sq.in.
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Cast iron tubes, headers and bends
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Twice working pressure minimum pressure, 700.
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Steel tubes and bends
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500 or less
Above 500 but not exceeding 1,000
Above, 1000
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1,000
Twice the working pressure
1,000 above the working pressure.
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| Headers
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Below 1,000
Above 1,000
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Twice the working pressure.
Working pressure plus 1,000 lbs./sq.in.
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For all assembled sections the Hydraulic Test pressure
shall be not less than 1 ½ times the working
pressure.
“Working pressure” shall be the highest
pressure at which the economiser relief valves are to
be set.
The above test pressure shall be held for a minimum
period of ten minutes.
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