PostgreSQL Dump based backup using pipe

We were using named pipe to read dump data from 'pg_dump -Fc' (compressed format) on Windows. 

Restore was failing with 'corrupt dump data' error.  

Later found that pg_dump was performing 'illegal seek' on pipe to write the data, which was causing corrupt dump.

I've two questions.

1. With tar format ( -Ft ) I see that data is written in serial fashion so we are planning to  switched to this format. 

     Is it safe to use name pipe to read from 'pg_dump -Ft' (tar format) ?

2. On Linux also from strace output of 'pg_dump -Fc' (compressed dump) used with fifo file, I see 'illegal seek' performed on fifo file too. 

But restore doesn't have any issues. Is  it safe to use 'pg_dump -Fc' with output file as fifo on Linux ?

Thanks

Girish