You can make a wide shelving unit, or an L shape 2 tiers shelf with this set of brackets, or in anyway you can do.

Selling: Industrial DIY 2 Tiers Ceiling Hung Pipe Shelf Brackets
(Pipes and Fittings Only) Color: Silver
Height: 77cm Depth: 37cm Weight: 5.4kg Pipe Diameter: 2.5cm
Flange Diameter: 8.5cm Material: Galvanized Iron
What will include in the package:
Flange x 12 Tee x 4 90 degree elbow x 4 32cm pipe x 16
Timber and otheraccessoriesnot included.