Unless you have Transco's gas go seaker equipment which must cost thousands you might aswell forget them. Other methods (one of which is now deemed to endanger members of the public so we won't talk about that one ) are always better, ldf applied competently and watched for sufficinet length of time will find most leaks.
But wait a minute a drop test is perfectly adequate, with a smell of gas there is no tollerance (apart from the discernible bit, but if you want to be pedantic you can omitdiscernable aswell, and chalk line the meniscus, watch it for aslong as you like (after stabilisation) if there is no leak it will not budge. Then your smell is not a gas leak prior to the operating controls of the appliance.
You cannot test beyond that point with a tightness test, when the appliance is in use all amounts of gas could escape between the control and the flame. Pilot bundy tubes all the little nuts on small pipework in fires cookers and and hobs are downright dangerous.
If there is no drop at all then it isn't in the service pipework. If there is a drop and you can't locate it, phone the esp number I gave you they will attend with suitable gas seaking equipment to locate the area strongest amount of gas is hanging around. They'll not fix it for you, they'll tofo you and you will be back to relying on one of us again, but at least you'll have a pointer as to where the leak is.
But wait a minute a drop test is perfectly adequate, with a smell of gas there is no tollerance (apart from the discernible bit, but if you want to be pedantic you can omitdiscernable aswell, and chalk line the meniscus, watch it for aslong as you like (after stabilisation) if there is no leak it will not budge. Then your smell is not a gas leak prior to the operating controls of the appliance.
You cannot test beyond that point with a tightness test, when the appliance is in use all amounts of gas could escape between the control and the flame. Pilot bundy tubes all the little nuts on small pipework in fires cookers and and hobs are downright dangerous.
If there is no drop at all then it isn't in the service pipework. If there is a drop and you can't locate it, phone the esp number I gave you they will attend with suitable gas seaking equipment to locate the area strongest amount of gas is hanging around. They'll not fix it for you, they'll tofo you and you will be back to relying on one of us again, but at least you'll have a pointer as to where the leak is.