(a) Process of manufacture.- The steel used for castings
shall be made by the open hearth or electric furnace or any
other process which gives steel having equivalent properties.
(b) Chemical analysis:- The ladle analysis shall conform
to the following requirements, namely:-
A carbon content not exceeding 0.30% may be accepted subject
to the agreement between the boiler maker and the Inspecting
(c) Heat Treatment.- All castings shall be supplied
in the heat-treated condition. The heat-treatment shall consist
of annealing, annealing and normalising, normalising, normalising
and tempering, or hardening and tempering, either at the discretion
of the manufacturer or the Inspecting Officer and shall be
carried out at suitable temperatures to give the mechanical
properties specified in Regulation
(d) Fettling and Dressing.- All castings shall be
properly fettled and dressed and all surfaces shall be satisfactorily
cleaned for inspection purposes.
(e) Freedom from Defects.- All castings shall be free
from injurious defects. In the event of any casting proving
defective in the course of preparation, machining or erection,
such casting may be rejected notwithstanding any previous
certification of satisfactory testing.