UFC 4-150-02
12 May 2003
3-1.3.2
Protection. For steam and condensate piping under a pier or wharf, or in
a drydock where submergence may occur, piping should be encased in a pressure-
testable, prefabricated conduit system. Corrosion-resistant conduit coatings should be
selected, and polyethylene heat-shrinkable sleeves and/or high temperature tape
wrapping must be used at joints and fittings. Provide pipe hangers and associated
support assemblies in accordance with paragraph 2-4.1.3. Hangers should be designed
based upon the maximum potential weight of the steam system; that is, the piping is full
of water. Identify piping and outlets and color-code in accordance with Chapter 6.
3-1.4
Location and Arrangement of Piping Mains and Branches. As a
general rule for all active berthing piers, provide a single main with cross-branch piping
to outlets. For repair piers, provide a main on each side of the pier and a cross
connection at the outboard end of the pier. Coordinate piping with structural conditions
and arrange mains for the best combination of versatility, security, and overall cost. It is
normally more desirable operationally to provide a looped main rather than an
equivalent single main. Provide isolation valves at appropriate locations for reliability of
service during emergency repairs. For graving drydocks, refer to UFC 4-213-10. The
location of ships steam connections may be found in SCDB. For discussion of methods
to be used to establish shore utility-station spacing on piers and wharves, refer to
Chapter 2.
3-1.5
Outlet Design. See Figure 3-1. Naval facilities use 50.8 mm (2 in) hoses
(from 1 to 10 per ship) almost exclusively for ship-to-shore steam connections. At
locations where 38.1 mm (1-1/2 in) and 25.4 mm (1 in) hoses are used, design for 50.8
mm (2 in) hoses and utilize reducing fittings at hose connections. Total numbers of
shipboard steam connections are found in SCDB. The number of hoses actually
connected to shore per ship varies with the severity of the climate. For facilities in the
coldest climates (see Appendix C, Figure C-1, Regions I and II), assume that all ships
connections will be connected to shore. For warmer climates, obtain the demand for
the appropriate design temperature; divide by 2500 for 50.8 mm (2 in) hose and by
1250 for 38.1 mm (1-1/2 in) hose. For existing facilities, the maximum number of hose
connections actually made for the ships to be berthed may be obtained from the
cognizant NAVFAC EFD/EFA OR USACE DISTRICT. Refer to Chapter 2 for a general
description of the arrangement and spacing of utility outlets.
3-1.5.1
Steam Outlet Assemblies. The design of steam outlet assemblies is to
include the following conditions.
Provide a shut-off valve for each riser assembly. The valve must be easily
accessible.
Provide a welded steel header after the riser shut-off valve. The header
must serve the hose connections.
The designer is responsible for determining the number of hose
connections required at each outlet assembly.
3-4
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