Pipe wall

What i understand is we can specify any schedule to any material pipeand fittings as long as it is easily available in market. It doesn't matter whether it follows a perticular standard or not. Many countries have there own systems and may have different practices too.

Sorry I think the problem was if the suffix S for CS is correct... I'm also agree with buying a pipe using a nominal thickness if the commercial sch do not apply with what I need. Is very common in high pressure.

Thanks hernan,
Sometimes clarification are known but needs to be tested. Thanks again