Circular pipe with fittings

Dear all
I am going to design a storage tank fire fighting cooling ring. The company has specified that the ring shall be circular or bent pipe with fittings.
Is there any possibility to design such a pipe in Pdms?
Thank you in advance

 

But, How can we extract isometric, any proper method by using pipe or macro ? anybody plz suggest and help to guide.

Bend --atta--bend ---atta