S02 - 8 Chase Riser and Pipe Size Details.pdf

This document is a technical detail sheet and specification guide for a steam and condensate piping system upgrade at a Department of Veterans Affairs facility. The project (Project #: 578-22-007, issued 10/19/21) involves installing new steam risers, condensate risers, isolation valves, finned tube heating elements, traps, and related components across four floors of a building with connections to an attic and tunnel.

The specification includes detailed pipe sizing requirements for vertical and horizontal runs throughout the building. Steam pipes range from 3 inches (attic to 4th floor) down to 1 inch (3rd to 4th floor), while condensate pipes range from 3/4 inches to 1 1/4 inches depending on location. Key installation details specified include: 8" type 'X' gypsum board on 3-5/8" metal studs spaced maximum 16" on center for fire protection; 18"x18" access panels at all valve locations; threaded rod deck penetrations with maximum 2" diameter and pipe hangers; new pipe insulation; firestopped floor penetrations; and 3-5/8" deep deflection tracks at the top of all door frames that remain unfastened to the top track. The drawings illustrate section and plan details for ceiling/deck and wall penetrations, as well as schematic diagrams showing the bottom-fed and top-fed steam riser configurations with trap and isolation valve placements at each floor level.