|Reg. 362 A, Reg. 362 B, Reg. 362 C
Branches, Bosses and Drain pockets
Branches, bosses and drain pockets welded to the pipes
shall conform to the requirements of regulations
249 to 253.
Branches shall not be welded to any main at an angle
of less than 60°.
Reg. 362 B
If the thickness of the main or branches of a single
or multiple branch piece is less than that given by
the equation 91-A external reinforcement shall be provided.
Such reinforcement may take the form of multiple radial
plates of horse shoe form or the form of
collars or other reinforcement, approved by the Chief
Inspector, applied to or around the junction between
the branch and the main.
Reg. 362 C
Thickness where no external reinforcement is provided
Where more than one branch is attached to a pipe the
opening of each branch shall be projected perpendicularly
on the axis of the main and the distance between each
pair of these projections measured. If the distance
so measured between two branches is less than the sum
of their bores, the two branches are deemed to affect
each other; if this distance is equal to or greater
than the sum of their bores, the two branches are deemed
not to affect each other.