A method statement should be produced before any welding, brazing or soldering is allowed on the outside of equipment which contains or might contain a hazardous material or might be under pressure.

• 在允许在其中含有或可能含有有害物质或可能带压的设备外部进行任何电焊、铜焊或软焊接之前，应当编制相关施工方案。