Specifies requirements for the design and manufacture, including materials and design stresses, workmanship, inspection, testing, documentation and marking, valves, gauges and fittings of: (a) water-tube steam generating plant subject to internal pressure; (b) parts of steam and water heating plant used in association with steam generating plant.

? British Standards Institution 2013

Amendment notes:
AMD 5171
AMD 5496
AMD 5582
AMD 5701
AMD 5901
Enquiry Case 1113/2
Enquiry Case 1113/3
Enquiry Case 1113/4
Enquiry Case 1113/5
Enquiry Case 1113/1 Free of charge incorporated
Generally, enquiry cases remain extant until incorporated into the standard. 1113/3 has been reissued

BS 1113:1989