|Reg. 216, Reg. 217, Reg. 218, Reg. 219
BOILER AND SUPERHEATER TUBES SUBJECT TO INTERNAL PRESSURE
The maximum working pressure for the tube shall be determined
by equation No.87 (see Regulation
The maximum thickness of the tubes shall comply with the
table given in Regulation
HEADERS AND SECTION BOXES OF WATER TUBE BOILERS
See Eqn.(88), Reg. (340).
BOILER TUBES (SMOKE ) SUBJECT TO EXTERNAL PRESSURE
Steel and Wrought Iron Tubes - (a) The maximum working pressure
for the tubes shall be : -
||100 (t - 6)
t = the thickness of the tubes in 100ths of an inch,
D = the external diameter of the tubes in inches.
(b) No tube shall be less than 12 S.W.G.(.104") thick.
HEADERS AND SECTION BOXES OF WATER TUBE
Brass and Copper Tubes
The thickness of tapered brass and copper smoke tubes for
locomotive boilers shall, in the case of tubes of an external
diameter of 1-1/2 to 1-7/8 inches inclusive, be not less than
12 S.W.G. (.104inch) at the smoke-box end and10 S.W.G.(.128
inch) at the other end in the case of tubes of an external
diameter of 2 to 2-3/8 inches inclusive, the thickness, at
the smoke-box end shall not be less than 11 S.W.G. (.116 inch)
and at the other end not less than 9 S.W.G. (.144 inch).