[Diy_efi] fuel tank fittings

[wdsmith]

Right in many cases.
It depends on the plastic. Some are not at all receptive, some are a bit 
reluctant and others almost make it seem easy.
I often think a Ph.D. in materials science would be a big help.
One thing I didn't mention is all plastics that are receptive should be 
"Veed" to full thickness  because of the problems you mention.
I'm guessing here but maybe the commercial units use such a small iron 
is to slow down the progress giving the HAZ more time to widen?????

Double right on being wary while working on a potential future bomb.
I'm not familiar with plastic automotive tanks. 
Some of us po' folk still drive an old Chevy truck with side saddle 
steel tanks.
And, yes, I am careful about cross traffic.<G>

ian wrote:
> On Wed, 2007-08-29 at 09:38 -0500, wdsmith wrote:
>
>   
>> Now, if you have read between the lines, you are probably wondering why 
>> you can't just grab an old soldering iron 9or a cheap new one) and get busy?
>>
>> I can't think of any reason.
>>     
>
> I would be very wary of welding plastic with a soldering iron - I've
> found that you get very little penetration if you can only heat the
> surfaces, and that the joints are quite brittle.
>
> I'd be wary of using such joins on a fuel system, especially for petrol.
>
>