non-sparking starter pinion requirement?

[ivymike]

Hi,

I've noticed that many times someone will specify that they want a non-sparking starter pinion for the starter on a diesel engine to be used in a classified (Class 1 Zone 2) area... while I understand the reasoning behind such a request, I'm so far unable to figure out which standard(s) recommend that practice. does anyone know offhand which standards dictate the use of non-sparking starter pinions (like copper-beryllium)?

 

[danw2]

The people who sell starters provide some standards in their sales lit:

http://www.ipustarting.co.uk/en/downloads/static/downloads/airstart_turbines_for_diesel_engines.pdf

 

[ivymike]

It was this literature which prompted my question, since a careful reading of it shows that the listed standards do not require cu/be.

 

[ivymike]

(Also, I was thinking of US standards, but that's not critical - I'm curious either way)