USACE / NAVFAC / AFCESA / NASA UFGS-23 22 26.00 20 (April 2006)
------------------------------
Preparing Activity: NAVFAC Replacing without change
UFGS-15183N (September 1999)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 23 22 26.00 20
STEAM SYSTEM AND TERMINAL UNITS
04/06
NOTE: This guide specification covers the requirements for provision of a complete
steam system within the building including steam, condensate, and terminal units
for heating.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
NOTE: This guide specification does not include steam boilers, feedwater treatment
equipment, or process steam terminal units, boiler feed, and blow-off piping.
NOTE: The following information shall be shown on the project drawings:
1. Extent of work including point of connection of new work to existing
2. General arrangement of the piping
3. Valve locations
4. Safety valve location, setting, pipe size, and method of termination
5. Valve clearances to permit proper valve operation in confined spaces
6. Floor stand, chainwheel operator, and power operator locations, when required
7. Floor stand details, when required
8. Electrical or compressed air power supply for power operators, when required
9. Expansion joints
10. Instrumentation
11. Condensate meters
12. Steam and air traps
13. Unit heaters, when required
14. Convertors, when required
15. Condensate return pumping units including pump capacity and electrical
characteristics for the pump motor
16. Radiation units including size and capacity
17. Location where cold-springing is permitted
18. Connections for future equipment, when required.
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[AIR-CONDITIONING, HEATING AND REFRIGERATION INSTITUTE (AHRI)AHRI 410(2001; Addendum 2002) Standard for Forced-Circulation Air-Cooling and Air-Heating Coils][AMERICAN WELDING SOCIETY (AWS)AWS Z49.1(2005) Safety in Welding, Cutting and Allied Processes][ASME INTERNATIONAL (ASME)ASME A13.1(2007) Scheme for the Identification of Piping SystemsASME B1.1(2003; R 2008) Unified Inch Screw Threads (UN and UNR Thread Form)ASME B1.20.1(1983; R 2006) Pipe Threads, General Purpose (Inch)ASME B16.11(2005) Forged Fittings, Socket-Welding and ThreadedASME B16.18(2001; R 2005) Cast Copper Alloy Solder Joint Pressure FittingsASME B16.20(2007) Metallic Gaskets for Pipe Flanges - Ring-Joint, Spiral Wound, and JacketedASME B16.21(2005) Nonmetallic Flat Gaskets for Pipe FlangesASME B16.22(2001; R 2005) Standard for Wrought Copper and Copper Alloy Solder Joint Pressure FittingsASME B16.24(2006) Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 400, 600, 900, 1500, and 2500ASME B16.3(2006) Malleable Iron Threaded Fittings, Classes 150 and 300ASME B16.34(2004) Valves - Flanged, Threaded and Welding EndASME B16.39(1998; R 2006) Standard for Malleable Iron Threaded Pipe Unions; Classes 150, 250, and 300ASME B16.5(2003) Standard for Pipe Flanges and Flanged Fittings: NPS 1/2 Through NPS 24ASME B16.9(2007) Standard for Factory-Made Wrought Steel Buttwelding FittingsASME B18.2.1(1996; Addenda A 1999; Errata 2003; R 2005) Square and Hex Bolts and Screws (Inch Series)ASME B18.2.2(1987; R 2005) Standard for Square and Hex NutsASME B31.1(2007; Addenda 2008) Power PipingASME B40.100(2005) Pressure Gauges and Gauge AttachmentsASME BPVC(2007) Boiler and Pressure Vessel CodesASME BPVC SEC IX(2007; Addenda 2008) Boiler and Pressure Vessel Code; Section IX, Welding and Brazing QualificationsASME BPVC SEC VIII D1(2007; Addenda 2008) Boiler and Pressure Vessel Code; Section VIII, Pressure Vessels Division 1 - Basic Coverage][ASTM INTERNATIONAL (ASTM)ASTM A 106/A 106M(2008) Standard Specification for Seamless Carbon Steel Pipe for High-Temperature ServiceASTM A 194/A 194M(2008b) Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure or High-Temperature Service, or BothASTM A 307(2007b) Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile StrengthASTM A 53/A 53M(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessASTM B 32(2008) Standard Specification for Solder MetalASTM B 88(2003) Standard Specification for Seamless Copper Water TubeASTM B 88M(2005) Standard Specification for Seamless Copper Water Tube (Metric)][COPPER DEVELOPMENT ASSOCIATION (CDA)CDA A4015(1994; R 1995) Copper Tube Handbook][MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS INDUSTRY (MSS)MSS SP-45(2003) Bypass and Drain ConnectionsMSS SP-58(2002) Standard for Pipe Hangers and Supports - Materials, Design and ManufactureMSS SP-69(2003; R 2004) Standard for Pipe Hangers and Supports - Selection and ApplicationMSS SP-80(2008) Bronze Gate, Globe, Angle and Check Valves][NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA ICS 2(2000; Errata 2002; R 2005; Errata 2006) Standard for Industrial Control and Systems: Controllers, Contractors, and Overload Relays Rated Not More than 2000 Volts AC or 750 Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control EquipmentNEMA ICS 6(1993; R 2006) Standard for Industrial Controls and Systems EnclosuresNEMA MG 1(2007; Errata 2008) Standard for Motors and Generators][U.S. DEPARTMENT OF DEFENSE (DOD)MIL-DTL-17813(Rev G) Military Standard for Expansion Joints, Pipe, Metallic BellowsMIL-E-17814(Rev F; CANC Notice 1) Expansion Joints, Pipe, Slip-Type, PackedMIL-V-18436(Rev F) Valves, Check, Bronze, Cast Iron, and Steel Body][U.S. GENERAL SERVICES ADMINISTRATION (GSA)CID A-A-50558(Basic) Valves, Pressure Regulating, SteamCID A-A-50559(Basic) Valves, Temperature-Regulating (Thermostatically Controlled)CID A-A-59617(Basic) Unions, Brass or Bronze, Threaded Pipe Connections and Solder-Joint Tube ConnectionsCID A-A-60001(Basic) Traps, SteamFS A-A-1689(Rev B) Tape, Pressure-Sensitive Adhesive, (Plastic Film)FS A-A-50494(Basic) Exhaust Head, SteamFS A-A-50543(Basic; Notice 1) Heaters, Convection, Steam or Hot WaterFS A-A-50544(Basic; Notice 1)Radiators, Heating, Steam and Hot Water, Cast IronFS A-A-50545(Basic; Notice 1) Radiator, Heating, Baseboard Panel, Steam and Hot WaterFS A-A-50568(Basic) Gages, Liquid Level Measuring, TankFS F-P-2908(Basic) pumping Units, Condensate, Return; and Boiler Feed PackageFS F-V-2906(Basic) Valves, Air Venting, SteamFS QQ-B-654(Rev A; Notice 1) Brazing Alloys, SilverFS S-R-2834(Basic) Radiators: Heating, Steel, Multifin TypeFS S-U-2833(Basic) Unit Heater, Air-Circulating, Steam - Hot WaterFS WW-H-191(Rev E) Heater, Fluid, Industrial (Instantaneous, Steam, Water Converter Type)FS WW-S-2739(Basic) Strainers, Sediment: Pipeline, Water, Air, Gas, Oil, or Steam]1.2 GENERAL REQUIREMENTS
Section 23 03 00.00 20 BASIC MECHANICAL MATERIALS AND METHODS, applies to this section, with the additions and
modifications specified herein. This section includes steam and condensate piping, [unit heaters,] [convertors,]
[condensate return units,] [radiation units,] [and steam coils] used for heating within the building. Steam
boilers, feedwater treatment equipment, process steam terminal units, boiler feed piping, and blow-off piping
are not covered in this section.
1.2.1 Classes and Maximum Working Pressures
Equipment, piping, and piping components shall be suitable for use under the maximum working pressure indicated.
Except as modified herein, the pressure temperature limitations shall be as specified in the referenced standards
and specifications.
1.2.2 Standard Commercial Product
The terminal units provided shall, as a minimum, comply with the features specified herein and shall be the manufacturer's
standard commercial product. Additional or better features which are not specifically prohibited herein but
which are a part of the manufacturer's standard commercial product, shall be included in the terminal units being
furnished. A standard commercial product is a product which has been sold or is currently being offered for
sale, on the commercial market through advertisements or manufacturer's catalogs or brochures. Provide Institute
of Boiler and Radiator Manufacturer (IBR) or Steel Boiler Institute (SBI) rating for required capacity.
1.2.3 Welding Safety
AWS Z49.1.
1.2.4 Definitions
1.2.4.1 High Pressure Piping System
A system whose pressure is greater than 103 kPa (gage) 15 psig and shall conform to ASME B31.1.
1.2.4.2 Low Pressure Piping System
A system whose pressure is 103 kPa (gage) 15 psig or less.
1.2.4.3 Terminal Unit
An enclosed unit that provides heated air from a steam coil and includes natural convection units, radiation,
and forced air units.
1.2.4.4 Piping and Piping System
Includes pipe, tubing, flanges, bolting, gaskets, valves, safety valves, fittings, and pressure containing parts
of other piping components, hangers, supports, guides, expansion joints, anchors, and other equipment items necessary
to prevent overstressing the pressure containing parts.
1.2.4.5 Year 2000 Compliant
Year 2000 compliant - means computer controlled facility components that accurately process date and time data
(including, but not limited to, calculating, comparing, and sequencing) from, into, and between the twentieth
and twenty-first centuries, and the years 1999 and 2000 and leap year calculations.
1.3 SUBMITTALS
NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] The following shall
be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
SD-03 Product Data
Unit heaters
Convertors
Condensate return pumping units
Finned tube radiation units
Cast iron baseboard radiation units
Convectors
Steam to air heating coils
Valves
Valve operating mechanism
Steam meters
Traps
Strainers
Flash Tanks
Expansion joints
Instrumentation
SD-06 Test Reports
Steam piping tests
Copper tubing test
Valves tests
Expansion joints tests
Instrumentation tests
Pipe and pipe system
Unit heaters tests
Convertors tests
Condensate return pumping units tests
Radiation units tests
Steam to air heating coils tests
Submit reports of tests required by the reference specification and standards.
SD-07 Certificates
Welding procedure
Welder's Performance Qualification Record
List of welders and welder's symbols
SD-08 Manufacturer's Instructions
Unit heaters
Convertors
Condensate return pumping units
Include manufacturer's recommendations for equipment foundations.
1.4 QUALITY ASSURANCE
1.4.1 Welding Procedure
Submit welding procedure specification for metals included in the work, together with proof of the procedure's
qualifications as outlined in ASME B31.1.
1.4.2 Welder's Performance Qualification Record
Submit [to the Contracting Officer] the Welder's Performance Qualification Record in conformance with ASME B31.1
for each welder, showing that the welder was tested under the approved procedure specification submitted by
the Contractor. In addition, the Contractor shall submit list of welders and welder's symbols, assigned number,
or letter which shall be used to identify the work of the welder which shall be affixed immediately upon completion
of the weld. Welders making defective welds after passing a qualification test shall be required to take a requalification
test. Welders failing the requalification tests will not be permitted to work under this contract.
1.4.3 Previous Qualifications
Welding procedures, welders, and welding operators previously qualified by test may be accepted for this contract
without requalification subject to approval if the conditions specified in ASME B31.1 are met before a procedure
can be used.
PART 2 PRODUCTS
2.1 PIPE AND PIPE SYSTEM
2.1.1 High Pressure Steam Piping System (Over 103 kPa (Gage)Over 15 psig)
NOTE: Specify the operating pressures and temperatures.
ASME B31.1 for a steam working pressure of [_____] kPa (gage) psig and a temperature of [_____] degrees C F,
a condensate pressure f [__ ___] kPa (gage) psig, and a temperature of [_____] degrees C F.
2.1.1.1 High Pressure Steam Piping
NOTE: Specify Schedule 40 pipe for systems operating at 862 kPa 125 pounds
or less steam pressure. For systems operating at pressures greater than 862
kPa 125 pounds or where piping will be subjected to high stress, determine pipe
thickness required and specify the appropriate pipe schedule.
ASTM A 106/A 106M or ASTM A 53/A 53M, Grade B, Schedule [_____], black steel, [electric-resistance welded] [or]
[seamless]. Use ASTM A 53/A 53M pipe for bending.
2.1.2 Low Pressure Steam Piping System
NOTE: Specify the operating pressures and temperatures.
ASME B31.1 for a steam working pressure of 103 kPa (gage) 15 psig or less, a condensate pressure of [_____] kPa
(gage) psig, and a temperature of [_____] degrees C F.
2.1.2.1 Low Pressure Steam Piping
a. Steel Piping: ASTM A 53/A 53M, Schedule 40, black, [electric-resistance welded] [or] [seamless].
Use ASTM A 53/A 53Mpipe for bending.
b. Copper Tubing: ASTM B 88M ASTM B 88, Type K.
2.1.3 Condensate Return Piping (690 kPa (gage)100 psig or Less)
2.1.3.1 Steel Piping
ASTM A 106/A 106M or ASTM A 53/A 53M, Grade B, Schedule 80, black, [electric-resistance welded] [or] [seamless].
2.1.3.2 Copper Tubing (103 kPa (Gage)15 psig or Less)
ASTM B 88MASTM B 88, Type K.
2.1.4 Fittings
Provide fittings compatible in all respects (material, size, pressure, and temperature limitations) with the
pipe being used and within any further limitations of ASME B31.1.
2.1.4.1 Fittings for Steel Pipe
a. Sizes 3 to 50 mm 1/8 to 2 inches:
(1) Steel Fittings: ASME B16.11, socket welding or threaded. Where pressure exceeds 103 kPa
(gage) 15 psig, provide socket-welding type only.
(2) Malleable Iron Fittings: ASME B16.3, threaded.
b. Sizes 65 mm 2 1/2 inches and larger:
(1) Steel Fittings: ASME B16.9, buttwelding or ASME B16.5, flanged.
(2) Bronze Fittings: ASME B16.24, flanged. Sizes larger than 200 mm 8 inches are not permitted.
2.1.4.2 Fittings for Copper Tubing
ASME B16.18, cast copper alloy or ASME B16.22, wrought copper, solder joint type. Flared or compression joint
type fittings for tube sizes not exceeding 50 mm 2 inches outside diameter (O.D.) may be provided as permitted
in ASME B31.1.
2.1.5 Unions
2.1.5.1 Unions for Steel Pipe
ASME B16.39, threaded.
2.1.5.2 Unions for Copper Tubing
CID A-A-59617, solder joint end type.
2.1.6 Flanges
Remove the raised faces on flanges when used with flanges having a flat face.
2.1.6.1 Steel Flanges
ASME B16.5, forged steel, welding type.
2.1.6.2 Bronze Flanges
ASME B16.24, threaded.
2.1.7 Valves
Shall conform to the following paragraphs. End connections shall conform to paragraph entitled "End Connections."
2.1.7.1 Gate Valves
a. Bronze Gate Valves: MSS SP-80, [Type 1 (solid wedge, non-rising stem)] [or] [Type 2 (solid
wedge, inside screw, rising stem)], 80 mm 3 inches and smaller, threaded or solder joint ends,
and not less than Class 150.
NOTE: When special trim material is required, revise latter portion of paragraph
to identify the special trim material.
b. Steel Gate Valves: ASME B16.34. Provide outside screw and yoke type with solid wedge or
flexible wedge disc, and with trim suitable for the service temperature and pressure.
2.1.7.2 Globe and Angle Valves
a. Bronze Globe and Angle Valves: MSS SP-80, Type 1 (metal disc, integral seat) or Type 3
(metal disc, renewable seat), 80 mm 3 inches and smaller, threaded or solder joint ends, Class
200 except that Class 150 with solder joint ends may be used for copper tubing. Valves shall
have renewable seats and discs, except solder joint end valves which shall have integral seats.
NOTE: When special trim material is required, revise latter portion of paragraph
to identify the special trim material.
b. Steel Globe and Angle Valves: ASME B16.34, with trim suitable for the service temperature
and pressure.
2.1.7.3 Check Valves
a. Bronze Check Valves: MSS SP-80, Type 3 (swing check, metal disc to metal seat), 80 mm 3
inches and smaller, threaded or solder joint ends, Class 200, regrinding type.
NOTE: When special trim material is required, revise latter portion of paragraph
to identify the special trim material.
b. Steel Check Valves: MIL-V-18436, with trim suitable for the service temperature and pressure.
(1) Swing Check Valves: Shall have bolted caps.
(2) Lift Check Valves: Shall have threaded or bolted caps.
2.1.7.4 Steam Pressure Reducing Valves
CID A-A-50558, Type [_____], Class [_____], Construction [_____], Load Characteristics [_____], cast iron prohibited.
2.1.7.5 Temperature Regulating Valves
CID A-A-50559, Type [_____], Style [_____], Class [_____], cast iron prohibited.
2.1.7.6 Air Vent Valves
FS F-V-2906, [with] [without] vacuum holding device, pressure rated for the intended service, and with a [capacity
of [_____] liter per secondcfm] [capacity based on manufacturer's standard for the connection size], cast iron
prohibited.
2.1.7.7 Radiator Valves
Provide angle or straightway pattern with packed or packless bonnet shutoff globe type designed especially for
steam heating system. Valve shall be constructed of copper alloy conforming to ASTM specifications for materials
with non-metallic renewable disc and plastic wheel handle for shutoff service.
2.1.7.8 Valve Operating Mechanism
NOTE: Show location of each floor stand, chainwheel, or power operator required
in the project. Delete paragraph entitled "Valve Operating Mechanism" and its
subparagraphs if these items are not required in the project.
Provide [floor stands] [chainwheels] [power operators] [and extension stems] where indicated and as specified.
NOTE: Show floor stand details including distance from centerline of valve
to top of floor, floor thickness, and handwheel height.
a. Floor Stands: Shall be cast iron or steel, constructed for bolting to the floor and shall
include an extension stem, an operating handwheel, and a position indicator for non-rising stems.
Floor stand shall be not less than 762 mm 30 inches high. Handwheel shall identify rotation
direction for closing the valve and shall be of such diameter as to permit operation of the
valve with a force of not more than 178 Newton 40 pounds.
b. Chainwheel Operator: Shall be fabricated of cast iron or steel and shall include a wheel,
an endless chain, and a guide to keep the chain on the wheel. Provide galvanized steel endless
chain extending to within 914 mm 3 feet of the floor.
NOTE: Show electric or compressed air power supply required to operate the
power operators.
c. Power Operators: Shall be [electric] [pneumatic]. Power operated valves shall open and
close at rates no slower than 254 mm 10 inches per minute for gate valves and 100 mm 4 inches
per minute for globe and angle valves. Valves shall open fully or close tightly without requiring
further attention when the actuating control is moved to the open or close position. A predetermined
thrust exerted on the stem during operation resulting from an obstruction in the valve shall
cause the motor to automatically stop. Power operators shall be complete with all gearing and
controls necessary for the size of valve being provided. Power operators shall be designed
to operate on the [electric] [compressed air] power supply indicated.
d. Extension Stem: Shall be corrosion resisting steel designed for rising and non-rising stems,
as applicable, and for connection to the valve stem by a sleeve coupling or universal joint.
Provide in length required to connect the valve stem and the [handwheel] [operating mechanism]
and of sufficient cross section to transfer the torque required to operate the valve.
2.1.7.9 Safety Valves
NOTE: The designer shall ensure that safety valves are installed for proper
personnel protection. Vent piping shall be sized to minimize back pressure.
The pipe sizes and the method of termination shall be shown on the drawings.
NOTE: Consult reference document to determine Type, Class, and Style as appropriate
for the project.
MIL-V-18436, Type 1, Class [____], Style [_____], and sized in accordance with ASME BPVC. Set point shall be
as indicated, cast iron prohibited.
2.1.8 End Connections
2.1.8.1 Steel Piping
Sizes 50 mm 2 inches and smaller threaded or socket welded; sizes 65 mm 2 1/2 inches and larger flanged or butt
welded.
a. Threaded Joints: ASME B1.20.1.
b. Flanged Joints: Flanges shall conform to paragraph entitled "Flanges." Bolting and gaskets
shall be as follows:
NOTE: For temperature limitations on the use of these bolts, consult ASME B31.1.
(1) Bolting: Material used for bolts and studs shall conform to ASTM A 307, Grade B; and material
for nuts shall conform to ASTM A 194/A 194M, Grade 2. Dimensions of bolts, studs, and nuts
shall conform to ASME B18.2.1 and ASME B18.2.2 with threads conforming to ASME B1.1coarse type,
with Class 2A fit for bolts and studs, and Class 2B fit for nuts. Bolts or bolt-studs shall
extend completely through the nuts and may have reduced shanks of a diameter not less than the
diameter at root of threads. Carbon steel bolts shall have American Standard regular square
or heavy hexagon heads and shall have American Standard heavy semifinished hexagonal nuts, conforming
to ASME B18.2.1 and ASME B18.2.2.
(2) Gaskets: Gaskets shall be as follows:
Working Conditions Material
Saturation
[_____] kPa (gage) [_____] degrees C Composition or Copper
Superheated Steam
Less Than 400 degrees C Metal-Jacketed Composition,
[_____] kPa (gage) [_____] degrees C Monel, Steel, or Soft Steel
Working Conditions Material
Saturation
[_____] psig [_____] degrees F Composition or Copper
Superheated Steam
Less Than 750 degrees F Metal-Jacketed Composition,
[_____] psig [_____] degrees F Monel, Steel, or Soft Steel
Gaskets shall be as thin as the finish of surfaces will permit. Metal or metal-jacketed non-asbestos
gaskets shall be used with small male and female or small tongue-and-groove flanges or flanged
fittings; they may be used with steel flanges with lapped, large male and female, large tongue-and-groove,
or raised faces. Full faced gaskets shall be used with flat-faced bronze flanges. Lapped steel
flanges, or raised-face steel flanges shall have ring gaskets with an outside diameter extending
to the inside of the bolt holes. Widths of gaskets for small male and female and for tongue-and-groove
joints shall be equal to the widths of the male face or tongue. Gaskets shall have an inside
diameter equal to or larger than the port openings. Rings for ring joints shall be in accordance
with dimensions in ASME B16.20, suitable for the service conditions encountered, and shall be
softer than the flanges. Dimensions for non-metallic gaskets shall be in accordance with ASME B16.21
.
c. Butt Weld Joints: ASME B31.1. The use of backing rings shall conform to ASME B31.1. Ferrous
rings shall be of good weldable quality and shall not exceed 0.05 percent sulfur; for alloy
pipe, backing rings shall be of material compatible with the chemical composition of the parts
to be welded and preferably of the same composition. Backing rings shall be continuous machined
or split band type.
d. Socket Weld Joints: ASME B31.1.
2.1.8.2 Joints for Copper Tubing
a. Solder Joints: ASTM B 32, alloy grade Sb5 solder for steam pressure 103 kPa (gage) 15 psig
or less.
b. Brazed Joints: FS QQ-B-654 for steam pressure 827 kPa (gage) 120 psig or less.
2.1.9 Expansion Joints
2.1.9.1 Packless Type
NOTE: Consult reference document to determine Type, Class, and Style as appropriate
for the project.
MIL-DTL-17813, Type [_____], Class [_____], located as indicated. Bellows material shall be [_____]. Expansion
joint shall be designed for [_____] cycles of movement.
2.1.9.2 Guided Slip-Tube Type
NOTE: Consult reference document to determine Type, Class, and Style as appropriate
for the project.
MIL-E-17814, Type [_____], Style [_____], Class [_____], locate as indicated. Expansion joint material shall
be [_____].
2.1.10 Instrumentation
2.1.10.1 Pressure and Vacuum Gages
ASME B40.100 with restrictor, locate as indicated. Provide scale range for intended service. Scale range not
to exceed two times (2X) the indicated pressure of piping.
2.1.10.2 Tank Gages
FS A-A-50568, locate as indicated.
2.1.10.3 Indicating Thermometers
Thermometers shall be dial type with an adjustable angle suitable for the service. Provide thermowell sized
for each thermometer in accordance with the thermowell specification. Fluid-filled thermometers (mercury is
not acceptable) shall have a nominal scale diameter of 125 mm 5 inches. Construction shall be stainless-steel
case with molded glass cover, stainless-steel stem, and bulb. Stem shall be straight, length as required to
fit well. Bimetal thermometers shall have a scale diameter of 90 mm 3 1/2 inches. Case shall be hermetic.
Case and stem shall be constructed of stainless steel. Bimetal stem shall be straight and of a length as required
to fit the well.
2.1.11 Miscellaneous Pipeline Components
2.1.11.1 Steam Meters
[a. Rotary Axial-Turbine Steam Meter
1. Provide rotary axial-turbine totalizing type designed for mounting directly in the steam
line (for sizes up to 100 mm 4 inches inclusively) or in a bypass piping arrangement with orifice
plate in the main line (for sizes 125 mm 5 inches and up). Bypass meter shall be furnished
for horizontal or vertical upward flow or vertical downward flow.
2. The meter shall be self-contained and self-operating requiring no mercury, pressure piping,
compressed air, or electrical connections except for operation of accessory contacts where required
or desired. The meter shall include a dampened fan shaft assembly, fixed internal orifice,
and magnetically driven counter of [dial and pointer type] [cyclometer type]. Stuffing box
shall not be allowed.
3. Materials of construction shall be [cast iron body with 113 kg 250 pounds flanged ends
for pressures up to 1724 kPa 250 psig and temperatures up to 232 degrees C 450 degrees F] [cast
steel body with 136 kg 300 pounds flanged ends for pressures up to 2070 kPa 300 psig and temperatures
up to 400 degrees C 750 degrees F]. Wear parts shall be of monel or stainless steel with graphite
top bearing and jewelled bottom bearing.
4. Meter shall be direct reading in pounds of steam over a 10 to 1 range, with continuous
overload capability up to 150 percent of rated capacity and temporary overload capability up
to 200 percent of rated capacity.
5. Accuracy shall be within plus or minus 2 percent of actual flow over the entire 10 to 1
range at flow rates and pressures within the limits set forth in the capacity tables.
[6. Meter shall be equipped with pressure compensating counter for automatically and continuously
correcting meter readings to compensate for line pressure variations. The counter shall be
self-contained and self-operating and require no connections other than a single tap to the
steam main. Pressure compensation range shall be [_____] to [_____] kPa psi.]
[7. Meter counter shall be equipped with electric contactor to operate a remote totalizer,
or for providing impulses for interfacing with an energy monitoring system. Contacts or impulses
to be proportional to pressure compensated steam flow.]]
[b. Variable Orifice Steam Meters
1. Provide spring loaded variable orifice principle type steam meters, density compensated,
to ensure accuracy within plus or minus 2 percent of actual flow rate independent of line pressure
changes.
2. Provide a computer to display totalized flow, flow rate, temperature, pressure, time, and
date.
3. The computer shall be capable of providing high and low flow rate and temperature alarm
set points, four independent timers to store peak flow rate and total flow, a 4 to 20 mA output
and a communication port for energy management interface.]
2.1.11.2 Air Traps
CID A-A-60001 for float-operated steam traps (non-thermostatic), except that the valve mechanism shall be inverted
so as to be closed, not opened, by rising water. Arrange float-controlled valves to close promptly when water
enters the traps. Locate traps as indicated.
2.1.11.3 Steam Traps
NOTE: Consult reference document to determine Type, Class, and Style as appropriate
for the project.
CID A-A-60001, Type [_____], Style [_____], thermostatic and non-thermostatic steam traps. Provide traps with
separate strainers and locate as indicated.
2.1.11.4 Strainers
FS WW-S-2739, Style Y (Y pattern) for Class 125 and 250 piping in sizes 15 to 200 mm 1/2 to 8 inches, inclusive,
locate as indicated, cast iron prohibited.
2.1.11.5 Exhaust Heads
FS A-A-50494, for atmospheric discharge of exhaust steam.
2.1.11.6 Hangers, Supports, Spacing Requirements, and Attachments
MSS SP-58 and ASME B31.1 for materials, design, and manufacture. MSS SP-69 for selection and application.
2.1.11.7 Flash Tanks
Construct of steel for a minimum working pressure of 862 kPa 125 psig. Provide the tank with a vent and valved
drain.
2.2 UNIT HEATERS
FS S-U-2833, [propeller] [centrifugal] fan type with [horizontal] [vertical] air delivery and with capacity as
indicated for the design conditions. Fans shall be dynamically balanced only.
2.3 CONVERTORS
FS WW-H-191, steam to hot water convertors, with capacity as indicated for the design conditions. Design convertor
for support by [system piping] [separate pipe hangers], and provide [temperature regulator] [air vent valve]
[air and steam trap].
2.4 CONDENSATE RETURN UNITS
NOTE: The discharge pressure limitations for condensate pumping unit with hexahedral
or vertical receiver is 69 to 517 kPa (gage) 10 to 75 psig, for horizontal receiver,
it is 69 to 1379 kPa (gage) 10 to 200 psig.
[2.4.1 Condensate Return Pumping Units
FS F-P-2908, with [hexahedral, floor-mounted receiver,] [horizontal, cylindrical, stand-mounted receiver,] [vertical,
cylindrical, underground receiver], and a [single] [duplex] pump unit, with capacity as indicated.
]2.4.2 Pump Motors
NEMA MG 1, suitable for the electrical characteristics as indicated. Motors shall be [open] [splash proof] [totally
enclosed] type.
2.4.3 Motor Starters
NOTE: The motor control requirements should be coordinated with Section 26
20 00, INTERIOR WIRING SYSTEMS and will depend on field conditions. The following
types of motor starters should be used as a guide only. When electrical equipment
is connected to heavily loaded power circuits, the starting current may cause
an excessive voltage drop on the circuit.
Motor kW Voltage Type Starter
Up to 5.50 208-230 Across-the-line-magnetic
5.50 to 11 208-230 Across-the-line-magnetic, part winding
or wye-delta
Motor h.p. Voltage Type Starter
Up to 7 1/2 208-230 Across-the-line-magnetic
7 1/2 to 15 208-230 Across-the-line-magnetic, part winding
or wye-delta
NEMA ICS 2, [manual] [across-the-line magnetic,] [reduced voltage-start] [part-winding] [wye-delta] type with
NEMA ICS 6 [general purpose] [weather-resistant] [water tight] enclosure.
2.5 RADIATION UNITS
2.5.1 Finned Tube Radiation Units
[FS S-R-2834, steel tube with steel fins,] [FS A-A-50545, copper tube with aluminum fins,] [with an adjustable
damper,] size and capacity not less than indicated.
2.5.2 Cast Iron Baseboard Radiation Units
FS A-A-50545, size and capacity not less than indicated.
2.5.3 Convectors
FS A-A-50543, FS A-A-50544, design and capacity not less than indicated.
2.6 STEAM TO AIR HEATING COILS
NOTE: For LANTNAVFACENGCOM projects, refer to LANTNAVFACENGCOM regional 15700,
"Heating, Ventilating and Cooling Systems."
Heating and ventilating units for steam system shall be as specified in [Section 23 00 00 AIR SUPPLY, DISTRIBUTION,
VENTILATION, AND EXHAUST SYSTEMS,] except that steam coils shall be provided in lieu of water coils. Coils for
factory fabricated air handlers and reheat coils shall be constructed as follows: Construct steam distribution
(nonfreeze type) coils of cast semi-steel, welded-steel, or copper headers, red brass or copper tubes, and copper
or aluminum fins mechanically bonded or soldered or helically wound to tubes. Roll and bush, braze, or weld
tubes into headers. Condensing tubes shall be not less than 16 mm 5/8 inch outside diameter. Distributing tubes
shall be not less than 10 mm 3/8 inch outside diameter, with orifices to discharge steam to condenser tubes and
shall be held securely in position. The maximum length of a single coil shall be limited to 120 times the outside
diameter of the tube. Coil casings and tube support sheets, with collars of ample width, shall be not lighter
than 16 gage 1.6129 mm thick 0.0635 inch thick galvanized steel, formed to provide structural strength. When
required, provide multiple tube supports to prevent tube sag. The finned tube and header section shall float
within the casing to allow free expansion of tubing for coils subject to high pressure steam service. Factory
test coils at 1724 kPa (gage) 250 psig hydrostatic test pressure or under water at 1724 kPa (gage) 250 psig air
pressure. Coils shall be suitable for 1379 kPa (gage) 200 psig steam working pressure. Test rate coils in accordance
with AHRI 410.
PART 3 EXECUTION
3.1 INSTALLATION
Work material and equipment into a complete, convenient, and economical system or systems; and provide apparatus,
parts, materials, and accessories which are necessary to accomplish this result.
3.1.1 Piping
Fabricate, assemble, weld, solder, braze, and install piping and pipe system in accordance with ASME B31.1 and
as further qualified herein. Piping shall follow the general arrangement shown. Cut piping accurately to measurements
established, for the work shown, by the Contractor, and work into place without springing or forcing, except
where cold-springing is indicated. Locate piping and equipment within buildings entirely out of the way of lighting
fixtures, conduit, and doors, windows, and other openings. Run overhead piping in buildings in the most inconspicuous
positions. Provide adequate clearances from walls, ceilings, and floors to permit the welding of joints; at
least 150 mm 6 inches for pipe sizes 100 mm 4 inches and smaller, 250 mm 10 inches for pipe sizes larger than
100 mm 4 inches, and in corners provide sufficient clearance to permit the welder to work between the pipe and
one wall. Make provision for expansion and contraction of pipe lines. Do not bury, conceal, or insulate piping
until it has been inspected, tested, and approved. Do not conceal piping in walls, partitions, underground,
or under the floor except as indicated. Where pipe passes through building structure, do not conceal pipe joints,
but locate where they may be readily inspected and not weaken building structure. Run insulated pipe as shown
and as required with sufficient clearance to permit application of insulation. Use flanged joints only where
necessary for normal maintenance and where required to match valves and equipment. Gaskets, packing, and thread
compounds shall be suitable for the service. Apply joint compound or tape on male thread only. Use long radius
ells wherever possible to reduce pressure drops. Pipe bends may be used in lieu of welding fittings where space
permits. Pipe bends shall have a uniform radius of at least five times the pipe diameter and shall be free from
any appreciable flattening, wrinkling, or thinning of the pipe. Mitering of pipe to form elbows, notching straight
runs to form full sized tees, or any similar construction shall not be used. Make branch connections with welding
tees except factory made forged welding branch outlets or nozzles having integral reinforcements conforming to
ASME B31.1 may be used, provided the nominal diameter of the branch is at least one pipe size less than the nominal
diameter of the run. Run piping as indicated, and avoid interference with other piping, conduit, or equipment.
Run vertical piping plumb and straight and parallel to walls, except where specifically shown otherwise. Do
not trap lines, except where indicated. Use reducing fittings for changes in pipe sizes. The use of bushings
is prohibited. In horizontal lines 65 mm 2 1/2 inches and larger, use reducing fittings of the eccentric type
to maintain the bottom of the lines in the same plane for steam lines and to maintain the top of the lines in
the same plane for condensate lines except where a trap or pocket would result. Provide suitable size sleeves
for lines passing through building structure. Install piping connected to equipment to provide flexibility for
thermal stresses and for vibration. Support and anchor pipe so that strain from weight and thermal movement
of piping is not imposed on the equipment. Thoroughly clean each section of pipe, fittings, and valves of foreign
matter before erection. Before placing in position, clean the inside of black steel pipe by rapping along its
full length to loosen sand, mill scale, and other foreign matter; pipe 50 mm 2 inches and larger shall have a
wire brush of a diameter larger than that of the inside of the pipe drawn through its entire length several times.
Before final connections are made to the apparatus, thoroughly wash out the piping interior with water. Blow
out steam piping with high-pressure steam, if available, or compressed air, removing rust, oil, chips, sand,
and other material. Plug or cap open ends of mains during shutdown periods. Do not leave lines open at any
place where any foreign matter might accidentally enter pipe.
3.1.1.1 Welding
a. Welding of Piping: Welding of joints in piping, butt welds, fillet welds, bends, loops,
offsets, and preparation and cleaning of pipe shall be in accordance with ASME B31.1. Welds
shall be visually examined and meet acceptance standards indicated in Chapter VI of ASME B31.1
.
b. Quality of Welds: Quality of welds, correction of defects, stress relieving, and preheating
shall be in accordance with ASME B31.1.
c. Arc Welding and Gas Welding: In accordance with ASME BPVC SEC IX.
3.1.1.2 Brazing and Soldering
a. Brazing and soldering procedure qualification shall conform to ASME B31.1. Brazing procedure
for joints shall be as outlined in the CDA A4015.
b. Soldering, soldering preparation, and procedures for joints shall be in accordance with
ASME B31.1 and as outlined in the CDA A4015.
c. Copper Tube Extracted Joint: An extracted mechanical tee joint may be made in copper tube.
Make joint with an appropriate tool by drilling a pilot hole and drawing out the tube surface
to form a collar having a minimum height of three times the thickness of the tube wall. To
prevent the branch tube from being inserted beyond the depth of the extracted joint, provide
dimpled depth stops. Notch the branch tube for proper penetration into fitting to ensure a
free flow joint. Braze extracted joints using a copper phosphorous classification brazing filler
metal. Soldered joints shall not be permitted.
3.1.1.3 Hangers and Supports
Unless otherwise indicated, horizontal and vertical piping attachments shall conform to MSS SP-58. Continuous
inserts and expansion bolts may be used.
3.1.1.4 Grading and Venting of Pipe Lines
Unless otherwise indicated, install horizontal lines of steam and return piping to grade down in the direction
of flow with a pitch of not less than 25 mm in 9 meters one inch in 30 feet, except in loop mains and main headers
where the flow may be in either direction. When counterflow of condensate within the steam pipe occurs in a
portion of a pipeline, pitch up in the direction of steam flow a minimum of 150 mm per 30 meters 6 inches per
100 feet and increase pipe diameters by one standard pipe size. Steam mains pitched away from the boiler shall
contain drip connection and air vent valves at the extreme end. Air vents shall be provided at the highest point
of any vertical riser. Drip connections shall not be interconnected above the water line of the boiler.
3.1.1.5 Pipe Sleeves
NOTE: Specify flanges and clamping rings where waterproofed construction is
required.
Provide pipe sleeves where pipes and tubing pass through masonry or concrete walls, floors, roofs, and partitions.
Use Schedule 40 galvanized steel pipe sleeves in outside walls below and above grade, in floor, and in roof slabs.
Sleeves in partitions shall be zinc-coated sheet steel having a weight of not less than 4.43 kg per square meter
0.907 psf. Space between pipe, tubing, or insulation and the sleeve shall be not less than 25 mm 1 inch. Hold
sleeves securely in proper position and location before and during construction. Sleeves shall be of sufficient
length to pass through entire thickness of walls, partitions, or slabs. Sleeves in floor slabs shall extend
50 mm 2 inches above the finished floor. Pack space between the pipe or tubing and the sleeve firmly with oakum
and caulk both ends of the sleeve with elastic cement. [Furnish sleeves in waterproofed construction with flanges
and clamping rings].
3.1.1.6 Floor, Wall, and Ceiling Plates
NOTE: Provide floor, wall, and ceiling plates for buildings other than power
plants and heating plants.
Secure plates to the pipe with enough clearance for thermal expansion of pipe. Use chromium-plated steel or
nickel-plated cast iron plates on pipes passing through floors and partitions of toilet rooms and where indicated;
use painted cast iron, malleable iron, or steel for all other plates.
3.1.1.7 Flashing for Buildings
Provide tight waterproof flashing where pipes pass through building roofs and outside walls.
3.1.1.8 Unions and Flanges
Provide unions and flanges where necessary to permit easy disconnection of piping and apparatus, and as indicated.
Provide a union for each threaded end valve. [Place unions or flanges no farther apart than 30 meters 100 feet
.] [Place unions or flanges as indicated.] Use unions on piping smaller than 50 mm 2 inches in diameter, and
use flanges on piping 50 mm 2 inches and larger in diameter. Provide dielectric unions or flanges between ferrous
and non-ferrous piping, equipment, and fittings; except that bronze valves and fittings may be used without dielectric
couplings for ferrous-to-ferrous or non-ferrous to non-ferrous connections. Dielectric fittings shall utilize
a non-metallic filler which will prevent current flow. The spacer shall be suitable for the pressure and temperature
of the service. The fittings shall otherwise conform to the requirements of paragraph entitled "Fittings."
3.1.1.9 Traps and Connections
Traps shall be of the type and capacity for the service and shall be properly supported and connected. Except
for thermostatic traps in pipe coils, radiators, and convectors, install traps with a dirt pocket and strainer
between it and the piping or apparatus it drains. When necessary to maintain in continuous service apparatus
or piping which is to be drained, provide a three-valve bypass so that the trap may be removed and repaired and
condensate may drain through the throttled bypass valve. Provide a check valve on the discharge side of the trap
whenever the trap is installed for lift or operating against a back pressure, or discharges into a common return
line. When a thermodynamic trap is used, a check valve is not required or recommended. Provide test connections
on the discharge side of the high and medium pressure traps when they are specifically required. The test connection
shall include a 15 mm 1/2 inch globe valve with uncapped nipple.
3.1.1.10 Connections for Future Equipment
Locate capped or plugged outlets for connections to future equipment as indicated.
3.1.2 Valves
3.1.2.1 General
Install valves in conformance with ASME B31.1, ASME BPVC SEC VIII D1, and as required herein, at the locations
indicated and elsewhere as required for the proper functioning of the system. Use gate valves unless otherwise
directed. Install stop valves in the supply lines equipped or located so as to permit operation from floor level,
or provided with safe access in the form of walkways or ladders. Install valves in positions accessible for
operation and repair. Provide gate valves 200 mm 8 inches and larger with globe-valved bypass in accordance
with MSS SP-45.
3.1.2.2 Globe Valves
Install globe valves so that the pressure shall be below the disk. Install globe valves with the stems horizontal
on steam and exhaust lines.
3.1.2.3 Steam Pressure-Reducing Valves
NOTE: The designer shall ensure that safety valves are installed for proper
personnel protection. Vent piping shall be sized to minimize back pressure.
The pipe sizes and the method of termination shall be shown on the drawings.
NOTE: The bypass valves shall be located in bypass piping. The valve and piping
shall be sized to restrict the capacity to approximately that of the reducing
valve and the sizes shall be indicated on the drawings.
NOTE: Provide a drip trap upstream of the pressure reducing valve to preclude
the build-up of condensate and potential water hammer through the valve and
downstream piping.
Provide the steam line entering each pressure-reducing valve with a strainer. Provide each pressure-reducing
valve unit with two cutout valves and with a globe or angle bypass valve and bypass piping. Provide each pressure-reducing
valve unit with an indicating steam gage to show the reduced pressure, and a safety valve on the low pressure
side with sufficient capacity to relieve the high pressure steam.
3.1.2.4 Valves for Radiators
Install a radiator valve on each radiator.
3.1.2.5 Safety Valves
Provide with drip pan elbows.
3.1.3 Pressure Gages
Install a shutoff valve or petcock between each pressure gage and the line, and gages on steam lines shall have
a syphon installed ahead of the gage.
3.1.4 Thermometers
Provide thermometers and thermal sensing elements of control valves with a separable socket. Install separable
sockets in pipe lines in such a manner to sense the temperature of the flowing fluid and minimize obstruction
to flow.
3.1.5 Steam Meters
Provide steam meters with a suitable three-valve bypass to permit dismantling and inspection without interference
with the service.
3.1.6 Strainers
Provide strainers with meshes suitable for the services where indicated, and where dirt might interfere with
the proper operation of valve parts, orifices, and moving parts of equipment.
3.1.7 Equipment Foundations
Design equipment foundations of sufficient size and weight to provide isolation and to preclude shifting of equipment
under operating conditions. Foundations shall meet the requirements of the equipment manufacturer. When required
by the Contracting Officer, the equipment manufacturer's approval of the foundation design and construction for
the equipment involved shall be obtained.
3.1.8 Equipment Installation
Install equipment as specified and in accordance with the manufacturer's installation instructions. Grout equipment
mounted on concrete foundations before piping is installed. Install piping in such a manner as not to place
a strain on any of the equipment. Do not bolt flanged joints tight unless they match. Adequately extend expansion
bends before installation. Grade, anchor, guide, and support piping without low pockets.
3.1.9 Cleaning of System
As installations of the various system components are completed, clean before final closing. Remove foreign
matter from equipment and surrounding areas. Preliminary or final tests shall not be performed until the cleaning
is approved.
3.1.10 Cleaning and Painting of Piping and Equipment
NOTE: When the project specification does not have a section on field painting,
the requirements for cleaning and painting of pipe and equipment, contained
in Section 09 90 00, PAINTS AND COATINGS, shall be included in this section.
Clean and paint piping and equipment in accordance with Section [09 90 00 PAINTS AND COATINGS].
3.1.11 Identification of Piping
Labels for pipes 20 mm 3/4 inch diameter and larger shall bear printed legends to identify contents of pipes
and arrows to shown direction of flow. Labels shall have color coded background to signify levels of hazard
in accordance with ASME A13.1. Legends and type and size of characters shall also conform as ASME A13.1. Make
labels of plastic sheet FS A-A-1689 with pressure sensitivity suitable for the intended applications, or they
may be premolded of plastic to fit over pipe. For pipe smaller than 20 mm 3/4 inch diameter, provide brass identification
tags 40 mm 1 1/2 inches in diameter with legends in depressed black filled characters.
3.2 FIELD TESTS AND INSPECTIONS
NOTE: For Contractor Quality Control projects, include field inspections.
NOTE: Coordinate with Division 1 concerning the availability of water and electric
power.
Field [inspections, field] tests, and trial operations specified in this section shall be performed by the Contractor.
The Contractor shall provide gas, oil, labor, equipment, and incidentals required for testing[, except that in
accordance with Division 1 the Government will provide water or electric power required for tests]. The Contractor
shall give the Contracting Officer [_____] days' advance written notice of the dates and times scheduled for
tests and trial operations.
3.2.1 Field Inspections
Inspect piping system prior to initial operation, for conformance to drawings, specifications, and ASME B31.1
. Equipment, material, or work rejected because of defects or non-conformance with drawings, specifications,
and ASME B31.1 shall be replaced or corrected by the Contractor, as directed by the Contracting Officer.
3.2.2 Field Tests
Conduct the following tests after completion of the piping installation and prior to initial operation.
3.2.2.1 Piping System
Test piping system hydrostatically using water not exceeding 38 degrees C 100 degrees F. Conduct tests in accordance
with the requirements of ASME B31.1 and as follows. Test the piping system after the lines have been cleaned
as herein specified and before any insulation covering has been applied. Test piping system at 1 1/2 times the
system pressure or 345 kPa (gage) 50 psig whichever is greater. Before performing tests, remove or valve off
from the system, gages, traps, and other apparatus which may be damaged by the test pressure. Install a calibrated
test pressure gage in the system to observe any loss in pressure. Maintain the required test pressure for a
sufficient length of time to enable an inspection to be made of joints and connections. Perform tests after
installation and prior to acceptance.
3.2.2.2 Start-Up and Operational Test
Start-up the system and initially operate with components operating. During the test, periodically clean the
various strainers until no further accumulation of foreign material occurs. Exercise care so that minimum loss
of [water] [steam] occur when strainers are cleaned. Adjust safety and automatic control instruments as necessary
to place them in proper operation and sequence.
3.2.2.3 Extent of Field Tests
After installation and before acceptance, subject the work of this section to necessary field tests, including
those herein specified, and in Section 23 05 93 TESTING, ADJUSTING AND BALANCING.