bids are invited for block cl s for by 159 and sh 31 to 36 std sr pp blk clmp _w_ 6od pipe din3015 , 6 od heavy series block cl , std sr pp blk clmp _w_ 8od pipe din3015 , 8 od heavy series block cl , 10 od heavy series block cl , std sr pp blk clmp _w_ 12od pipe din3015 , 12 od heavy series block cl , std sr pp blk clmp _w_ 15od pipe din3015 , 15 od heavy series block cl , 16 od heavy series block cl , std sr pp blk clmp _w_ 18od pipe din3015 , 18 od heavy series block cl , std sr pp blk clmp _w_ 22od pipe din3015 , 22 od heavy series block cl , 25 od heavy series block cl , std sr pp blk clmp _w_ 28od pipe din3015 , 28 od heavy series block cl , std sr pp blk clmp _w_ 35od pipe din3015 , 35 od heavy series block cl , std sr pp blk clmp _w_ 42od pipe din3015 , 42 od heavy series block cl total quantity : 5319