# The Smoke Control Areas (Authorised Fuels) Regulations 1991, Paragraph 16

Extent: E+W+S
Status: prospective

Pureheat ovoids, manufactured by Applied Industrial MaterialsCorporation (AIMCOR) at Rotterdam, the Netherlands, which—
(a) comprise petroleum coke (as to 60 to 75 per cent of the totalweight), bituminous coal (as to 10 to 20 per cent of the total weight),limestone (as to 6 to 10 per cent of the total weight) and a coal tarpitch binder (as to the remaining weight);
(b) were manufactured from those constituents by a process involvingroll-pressing, carboni-sation for 30 minutes at 550°C to 600°Cand hardening in sand at about 500°C for a further 30 minutes;
(c) are ovoids with two indentations on one side and one indentation onthe other side running parallel to the longest side and have an averageweight of 90 grammes; and
(d) have a sulphur content not exceeding 1.5 per cent of the totalweight.

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Source: https://www.legislation.gov.uk/uksi/1991/1282/schedule/1/paragraph/16 (the official version)
Page: https://openlegislation.uk/smoke-control-areas-authorised-fuels-regulations-1991/schedule-1/paragraph-16
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.