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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

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.



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
 

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.”

 



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
 

For all new economisers the hydraulic test must be applied as shown below:-

On Components before assembly
Design pressure lbs/sq. in.
Hydraulic test pressure lbs./sq.in.
Cast iron tubes, headers and bends
  Twice working pressure minimum pressure, 700.

Steel tubes and bends

500 or less

Above 500 but not exceeding 1,000

Above, 1000

1,000

Twice the working pressure

1,000 above the working pressure.

Headers Below 1,000

Above 1,000

Twice the working pressure.

Working pressure plus 1,000 lbs./sq.in.

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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