# The Ammonium Nitrate Materials (High Nitrogen Content) Safety Regulations 2003, Paragraph 2


Materials
(a) Plastic explosive containing 83 to 86% penthrite (Note 2)
Density: 1,500 to 1,600 kg/m3
Detonation velocity: 7,300 to 7,700 m/s
Mass: 500 ± 1 gram.
(b) Seven lengths of flexible detonating cord with non-metallic sleeve
Filling mass: 11 to 13 g/m
Length of each cord: 400 ± 2 mm.
(c) Compressed pellet of secondary explosive, recessed to receive detonator
(d) Explosive: hexogen/wax 95/5 or tetryl or similar secondary explosive, with or without added graphite.
Density: 1,500 to 1,600 kg/m3
Diameter: 19 to 21 mm
Height: 19 to 23 mm
Central recess to receive detonator: diameter 7 to 7.3 mm, depth 12 mm.
(e) Seamless steel tube as specified in ISO 65 of the International Organisation for Standardisation (carbon steel tubes suitable for screwing in accordance with ISO 7-1 -Pipe threads where pressure tight joints are made on threads)—Heavy Series, with nominal dimensions DN 100 mm
Outside diameter: 113.1 to 115.0 mm
Wall thickness: 5.0 to 6.5 mm
Length: 1,005 (± 2) mm.
(f) Bottom plate
Material: steel of good weldable quality
Dimensions: 160 × 160 mm
Thickness: 5 to 6 mm.
(g) Six lead cylinders
Diameter: 50 (± 1) mm
Height: 100 to 101 mm
Materials: soft lead, at least 99.5% purity.
(h) Steel block
Length: at least 1,000 mm
Width: at least 150 mm
Height: at least 150 mm
Mass: at least 300 kg if there is no firm base for the steel block.
(i) Plastic or cardboard cylinder for booster charge
Wall thickness: 1.5 to 2.5 mm
Internal diameter: 92 to 96 mm
Height: 64 to 67 mm.
(j) Detonator (electric or non-electric) with initiation force 8 to 10
(k) Wooden disc
Diameter: 92 to 96 mm. Diameter to be matched to the internal diameter of the plastic or cardboard cylinder.
Thickness: 20 mm.
(l) Wooden rod of same dimensions as detonator.
(m) Dressmaking pins (maximum length 20 mm).

---
Source: https://www.legislation.gov.uk/uksi/2003/1082/schedule/2/part/2/paragraph/2 (the official version)
Page: https://openlegislation.uk/ammonium-nitrate-materials-high-nitrogen-content-safety-regulations-2003/schedule-2/part-2/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.