The methods of jointing depend on when the boat’s keel was first laid. If the keel was laid before March 2001, the requirements of PD 5482-3 - Code of practice for domestic butane and propane gas-burning installations should be followed. If the keel was laid before March 2001, the requirements of EN ISO 10239 - Small craft - Liquefied petroleum gas (LPG) systems should be followed.
- Generally the jointing requirements for both standards are similar:
· Compression fittings should be made of copper or copper alloy to BS EN 1254-2 with annealed olives, in the case of stainless steel pipework, stainless steel olives should be used. The fittings should be galvanically compatible with the pipework.
· Where cutting rings are used on copper tube, a brass insert sleeve should be used.
· Where braised connections are used, they should be in accordance with BS 1723, using filler metals to BS EN 1044, with a melting point of not less than 450oC. Note: Soft soldered joints are not acceptable.
In the case of jointing materials:
· Washers and gaskets should be suitable for LPG (where appropriate). Note: Fibre washers and hemp should not be used.
· PTFE tape should conform to BS EN 751-3 - Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water. Unsintered PTFE tapes. PTFE tape to BS 7786 should not be used.
Jointing compounds should comply with BS EN 751-2 - Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water. Non-hardening jointing compounds.