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Reg. 509, Reg. 510, Reg. 511
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMISER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
CAST IRON, TUBES AND HEADERS
Standard test piece |
|
The tensile test bar shall conform to the dimensions
shown in the following drawing. Bars may be tested with either
plain or screwed ends.
| B |
D |
A |
P |
R |
C |
E |
F |
Lp |
Ls |
|
In.
1.20
|
In.
0.798 |
Sq.in.
0.50 |
In.
2 |
In.
3-1/2 |
In.
2 |
In.
1-1/8
SF
1-1/8
SW |
In
1-1/8 |
In.
8-1/4 |
In.
5-7/8 |
The test bars shall be cast as cylindrical bars of the
diameters given in Col. B and machined to the dimensions
given in Cols. D & P in the above Table.
See Figure
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Reg. 510
STANDARD CONDITIONS FOR THE DESIGN AND
CONSTRUCTION
OF ECONOMIZER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
CONSTRUCTIONAL REQUIREMENTS
Cast Iron Economisers |
| |
|
The manufacturer shall, on the basis of design details,
satisfy the Inspecting Authority regarding the design
and the strength of all parts of cast iron economisers
subject to the following maximum working pressure:-
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Max. W.P. |
| (1) |
Ordinary Vertical Tube |
325 lbs. /sq. in. |
| (2) |
Ordinary Vertical Tube
with strengthened tubes |
375 lbs. /sq.in. |
| (3) |
Ring Stay Vertical Tube |
475 lbs./sq. in. |
| (4) |
Gilled Tube type approved
design |
45.7 kg/cm² (650
lbs./sq.in.) |
|
|
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Reg. 511
STANDARD CONDITIONS FOR THE DESIGN AND CONSTGRUCTION
OF ECONOMIZER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR
VESSELS
CONSTRUCTIONAL REQUIREMENTS
Joint bolts and studs for Cast Iron Economisers |
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| a) |
The maximum working pressure
for the bolts and studs shall be calculated by Regulation
518. |
| b) |
The use of studs tapped into
cast iron is permissible where:-
| (i) |
The studs and nuts are
not in the path of the flue gases. |
| (ii) |
The studs are carefully
threaded to gauge and fitted into tapped holes of
ample depth. |
For economiser of Gilled Tube type of approved design
made from 16.5 grade iron the limitation for a maximum
working pressure may be increased to 52.7 kg/cm²
(750 lbs./sq.in.) |
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