External storage of hydrogen Cylinders

[mariner]

Looking for some advice reference guidance docs on external requirements of hydrogen cylinders, small cage on concrete hard standing well ventilated area, however near a boiler system which is protected by fire proof wall enclosed with sufficient AFD, only 5 small cylinders to be used, no mixed storgae. Understand has to be 4mts away on external wall, any advice appreciated   

[deaconj999]

British Compressed Gas Association CODE OF PRACTICE 33 Bulk Storage of Gaseous Hydrogen at Users’ Premises is possibly what you need.

Have a look here http://www.bcga.co.uk/preview/products.php?g1=3ff921&n=3