Requirements for the materials, dimensions and power provision for conveyors constructed of carbon steel and stainless steel in sizes from 100 mm to 1250 mm nominal diameter.Cross References:BS 970:Part 1BS 1449:Part 1BS 1449:Part 2BS 3733BS 3790BS 4409:Part 2BS 4506BS 6323:Part 1BS 6323:Part 3BS 6323:Part 8Institution of Electrical Engineers Regulations