Singapore legislation
Regulation 78
Regulation 78
Tests for elbows and valves
Subregulation 1
Elbows and valves attached to the shell plating; shoots for ashes, galley refuse, etc.; chests for ventilators, and other castings of a similar character shall be subjected to bending tests in the following proportions from the castings of each charge:
one in 12 for small castings, such as elbows, valves, chests for ventilators, etc.;
one in 4 for galley refuse shoots; and
one for each large casting, such as ash shoots.
Subregulation 2
The test-pieces shall withstand being bent cold, without fracture, through an angle of 60° if the tensile strength of the casting is between 35 and 40 tons per square inch and in the case of other castings through an angle of 90°.The internal radius of the bend shall not be greater than one inch.