STAND PIPES, PADS ETC.
Design of stand pipes.-The design of the branches and standpipe
shall be regulated in the following manner:
(a) in order to withstand the maximum working pressure or design
minimum thickness of branch and standpipe shall be
determined in accordance with the provisions specified in
sub-regulation (a) of regulation 338;
(b) compensation requirements for openings in the main pressure
parts shall be determined in accordance with the provisions of
(c) the additional thickness shall be considered to withstand
superimposed loading due to connecting pipe-work or fittings.
minimum thickness of the branch or stand-pipe shall be the
greatest of the values required above and shall not be less
than 0.015 do + 3.2 mm where do is the
outside diameter of the branch (in mm.):
that the provisions of the regulations shall not
apply to such tube stub which have been designated as tubes.