STAND PIPES, PADS ETC.
Stand Pipes and Pads
Stand pipes and settings for carrying mountings shall be made
of wrought, cast or fabricated steel. These shall take the form
of short stand pipes, pressed steel plate saddles, forged pads
or pads cut from round rolled bar as may be most convenient
and secured to the boiler by riveting or welding. Where short
stand pipes are used they shall be of solid forged, fabricated
or cast steel. They shall be carefully bedded to the shell before
attachment and where riveted the rivets shall be so pitched
as to ensure a tight joint. The jointing faces to which mountings
are to be bolted shall be machined. Pads shall have sufficient
thickness to allow the drilling of stud holes for mountings
without the inner surface being pierced and the length of the
screwed portion of the stud in the pad shall be not less than
the diameter of the stud.