But you are over thinking the job. These are specs for the material used
What you need is the high pressure and low pressure** LPG hose to BS 3212 Type 2 and type 1 respectively and the fittings for them from a supplier such as SOCAL ( Southampton Calor Centre), BES ( BES.co.uk | Next Day Delivery On 15,000 + Plumbing Supplies } or your local caravanning supplies shop.
( beware of local suppliers with small sales levels though or your hose will be well into its 5 year life before you fit it )
If you need made up hoses or armoured hoses SOCAL or BES again
**You can use the HP hose throughout but it is less flexible and a bit more difficult to get onto low pressure (Fulham) nozzles than the LP hose.