TranSystems Corporation - LGM Construction

501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11
connection to equipment served. Install piping, check valves, strainers, and shut-off valves in
equipment outlet or return lines beyond dirt pockets the size of the equipment connection.
G. Install bell and spigot pipe, such that spigot ends point in direction of flow.
H. Branch take-offs shall be from top of mains or headers at either 90 or 45-degree angle above the
horizontal plane for gas, steam, or airlines, and from the bottom, or 45-degree angle below the
horizontal plan for liquids. Top branch take-offs for liquids shall be allowed for non-circulating
liquids (potable water) and for recirculating liquids if branch contains air vents.
I. Where galvanizing has been burned off due to welding, clean surfaces and paint with one coat of
rust inhibiting metal primer, and when dry, one coat of zinc rich paint.
J. Installed pipe shall be new and shall be straight, true, and free from defects. Pipe shall be reamed
out full size before erection. Remove all scale prior to assembly. Pipe and tubing shall be cut
accurately to measurements established at the site and shall be worked into place without
springing or forcing. Particular care shall be taken to avoid creating, even temporarily, undue
loads, forces or strains on valves, equipment or building elements with piping connections or
piping supports.
K. Piping shall be installed with sufficient flexibility to adequately provide for expansion and
contraction due to temperature fluctuation inherent in its operation.
L. Care shall be taken to insure that bracing and supports will not restrain expansion and contraction
nor set up excessive stresses at joints and at equipment.
M. Provide flanged connections or unions at each piece of equipment so it can be easily removed for
service without disturbing the piping system.
N. Unless noted otherwise, exposed vertical piping shall be installed perfectly plumb.
O. No more than 3/16 inch additional metal shall be deposited on a weld. Wherever leaks manifest
themselves in welded piping, the weld metal shall be ground out to parent metal and the joint
rewelded with no more than 3/16 inch excess metal deposited. After welding, piping shall be
tested as elsewhere specified.
P. No piping shall be run concealed in walls or partitions, nor underground nor under the floor, except
as shown. Where pipe passes through building structure, pipe joints shall not be concealed, but
located where they may be readily inspected.
Q. Pipes to be insulated shall be run as shown and as required with sufficient clearance to permit
application of insulation.
R. Burrs on the pipe due to cutting or other causes shall be completely removed by reaming prior to
erection.
S. Solder joints shall be made with soft solder filling the entire void between the tube and fitting, and
filling the solder hole in the valves and fittings. Flux shall be used to insure that an intimate bond
of solder appears. Solder containing lead shall not be permitted.
BASIC MATERIALS AND METHODS 15050-12