Addendum 1

Revision A

July 29, 1994

Contract #TW0592

SPECIAL SPECIFICATION

SECTION 15051-S

[PIPING SYSTEMS]{.underline}

Page

[PART 1 - GENERAL]{.underline}

1.01 Work Included 2

1.02 Quality Assurance 3

1.03 References 3

1.04 Submittals 4

PART 2 - PRODUCTS

2.01 Acceptable Manufacturers 5

2.02 Materials For Saturated Steam Systems 5

2.03 Materials For Space Heating, Chilled Water, Tower Water & Other
Hydronic Systems 7

2.04 Materials For Natural Gas Systems 10

2.05 Materials For Compressed Air Systems 10

12 2.07 Equipment 13

PART 3 - EXECUTION

3.01 Piping Installation 16

3.02 Tests 22

3.03 Commissioning 23

SPECIAL SPECIFICATION

SECTION 15051-S

[PIPING SYSTEMS]{.underline}

# PART 1 - GENERAL

## 1.01 [WORK INCLUDED]{.underline}

A. Materials and operations required for the installation of piping
systems including: pipe fittings, valves, equipment, joints, and tests
for the following systems:

1\. High Pressure Steam (HPS), Medium Pressure Steam (MPS), Low Pressure
Steam (LPS), Condensate (C), Pumped Condensate (PC), and Steam Vent (SV)

2\. Heating Water Supply (HWS) and Heating Water Return (HWR)

3\. Chilled Water Supply (CWS), Chilled Water Return (CWR), Tower Water
Supply (TWS), Tower Water Return (TWR), and Refrigeration Vent (RV)

a\. Aboveground

b\. Belowground

4\. Process Cooling Water Supply (PCWS), Process Cooling Water Return
(PCWR), High Temperature Cooling Water Supply (HCWS), and High
Temperature Cooling Water Return (HCWR)

5\. Natural Gas (G) (For Below Ground Natural Gas Piping, see Exterior
Gas Piping Systems, Section 15F (02685))

6\. Compressed Air (CA)

a\. Aboveground

B**.** Pipe and fittings to be used for modifications or additions shall
be the same material (steel or copper) as the existing systems being
modified, but shall conform to the following, unless otherwise indicated
on the applicable contract drawings.

## 1.02 [QUALITY ASSURANCE]{.underline}

A. Welding Materials and Procedures: Conform to ASME code for Pressure
Piping, ANSI/ASME B31.1, Power Piping.

B. Employ welders certified in accordance with ASME Boiler and Pressure
Code, as modified by ANSI/ASME B31.1, Power Piping

C. Brazing: Certify brazing procedures, brazers, and operators in
accordance with ANSI/ASME B31.1, Power Piping, for shop and jobsite
brazing of piping work.

D. Soldering: Conform to ANSI/ASME B31.1, Power Piping.

E. Natural Gas Piping and Equipment Installation: Contractor shall be
licensed by the State of New Mexico Regulation and Licensing
Department - Construction Industries Division, and shall use licensed
pipefitters.

## 1.03 [REFERENCES]{.underline}

The current editions of the following standards are a part of this
specification.

A. Sandia National Laboratories Standard Specifications:

1\. 01300 Submittals

2\. 02200 Earthwork

3\. 09900 Painting

4\. 15050-S General Material and Work Requirement - Mechanical

5\. 15200-S Vibration Limits and Control

6\. 15250-S Insulation - Mechanical Systems

B. American National Standards Institute (ANSI)

1\. ANSI B1.1 Unified Screw Threads

2\. ANSI B1.2 Gages and Gaging for Unified Inch Screw Thread

3\. ANSI B2.1 Standard Welding Procedure Specification

4\. ANSI B16.3 Malleable Iron Thread Fittings Classes 150 and 300

5\. ANSI B16.5 Pipe Flanges and Flanged Fittings

6\. ANSI B16.9 Factory-made Wrought Steel Buttwelding Fittings

7\. ANSI B16.22 Wrought Copper and Copper Alloy Solder-Joint Pressure
Fittings

8\. ANSI B16.24 Bronze Pipe Flanges and Flanged Fittings Class 150 and
300

9\. ANSI B31.1 Power Piping

C. American Society of Mechanical Engineers (ASME)

> ASME Boiler and Pressure Vessel Code

D. American Society for Testing and Materials (ASTM)

1\. ASTM A53 Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and
Seamless

2\. ASTM A126 Gray Iron Castings for Valves, Flanges, and Pipe Fittings

3\. ASTM A182 Forged or Rolled Alloy Steel Pipe Flanges, Forged Fittings
and Valves and Parts for High Temperature Service

4\. ASTM A193 Alloy-Steel and Stainless Steel Bolting Materials for High
Temperature Service

5\. ASTM A194 Carbon and Alloy Steel Nuts for Bolts for High Pressure
and High Temperature Service

6\. ASTM A234 Pipe Fittings of Wrought Carbon Steel and Alloy Steel for
Moderate and Elevated Temperatures

7\. ASTM A307 Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength

8\. ASTM B61 Standard Specification for Steam or Valve Bronze Casting

9\. ASTM B88 Seamless Copper Water Tube

E. American Welding Society (AWS)

> AWS A5.8 Specification for Brazing Filler Metal

F. International Association of Plumbing and Mechanical Officials
(IAPMO); International Conference of Building Officials (ICBO)

1\. UMC Uniform Mechanical Code

2\. UPC Uniform Plumbing Code

G. American Gas Association (AGA)

## 1.04 [SUBMITTALS]{.underline}

A. All required submittals shall be per Standard Specification, Section
01300.

B. All pipe materials, valves, equipment and accessories not listed in
this specification under [PART 2 - PRODUCTS]{.underline} shall be
submitted for approval.

C. All relief valves require submittals for approval.

# PART 2 - PRODUCTS

## 2.01 [ACCEPTABLE MANUFACTURERS]{.underline}

The manufacturers listed under this section suppy products of acceptable
type, quality, and performance.

## 2.02 [MATERIALS FOR SATURATED STEAM SYSTEMS]{.underline}

A. Piping:

1\. Steam - Schedule 40 black steel with butt welded joints, ASTM A53,
Grade B, Type S (seamless).

2\. Condensate - Schedule 80 steel, ASTM A-106, Grade B (seamless).

B. Fittings:

1\. Steam

a.. 1-1/2 Inches and Smaller: Screwed fittings, threaded tapered joints,
ANSI B31.1, ANSI B2.1.

b\. 2 Inches and Larger: Schedule 40 wrought steel, ASTM A234,
butt-weld, and ANSI B16.9.

2\. Condensate

a\. 1-1/2 inches and smaller: screwed fittings, 2000 lb, ASTM A-105 or
A-181, Class 70, ANSI B16.11.

b\. 2 inches and larger: steel, seamless, standard weight, ASTM A-234,
Grade WPB, butt-weld ends, ANSI B16.9, to match pipe.

C. Flanges:

1\. 1-1/2 Inches and Smaller: 150 pound forged steel, screwed, ANSI
B16.5.

2\. 2 Inches and Larger: 150 pound forged steel welding neck, ANSI
B16.5.

D. Gaskets: 0.175\" thick with 1/8\" solid-metal stay ring. Material is
304 stainless steel with chlorocarb graphite filler. Flexitallic, Style
CG or Lamons Spiraseal Style WR.

E. Bolts and Nuts: Bolts shall conform to ASTM A193, Grade B7. Nuts
shall conform to ASTM A194, Grade 2H.

F. Valves:

1\. Gate (30 to 125 psig service):

a\. 1-1/2 Inches and Smaller: Class 150, inside screw, backseated union
bonnet, rising stem, cast bronze construction per ASTM B61, solid wedge
disc, with threaded ends. Crane No. 431UB.

b\. 2 Inches and Larger: Class 150, cast steel, outside screw and yoke
(OS&Y), rising stem, and flanged ends. Trim shall be bronze per ASTM B61
or 316 stainless steel. Nibco CS-102.

c\. 4 Inches and Larger: Class 150, cast steel, OS&Y rising stem,
flanged ends, bronze trim per ASTM B61, or 316 stainless steel. Nibco
CS-102.

2\. Gate (under 30 psig):

a\. 1-1/2 Inches and Smaller: Class 125, bronze body, threaded ends,
rising stem, screwed bonnet and solid wedge disc. Crane No. 428.

b\. 2 to 3 Inches: Class 125, bronze body, threaded ends. Crane No. 428;
Class 125, iron body OS&Y, flanged ends. Crane No. 465-1/2.

c\. 4 Inches and Larger: Class 125, iron body, flanged ends, OS&Y. Crane
No. 465-1/2.

3\. Globe:

a\. 1-1/2 Inches and Smaller: Class 150, bronze body, union bonnet,
conforming with ASTM B61, tapered plug type, stainless steel disc and
seat, threaded ends. Crane No. 14-1/2P.

b\. 2 Inches and Larger: Class 125, iron body comforming to ASTM A126,
Class B, bronze trim, flanged ends, bolted bonnet, bronze disc,
replacable seats. Crane No. 351.

4\. Check: 1-1/2 Inches and Smaller: Class 125, bronze, swing check, Y
style bronze disc and screw caps, screwed ends. Crane No. 37.

5\. Needle: 1 inch and smaller: positive shut-off for gages and manual
air vents, brass. Whitey \"O\" Series.

G. Strainers:

1\. 1-1/2 Inches and Smaller: Class 250, screwed ends, Y pattern with
stainless steel screen - 20 mesh (0.033\" openings). Spirax-Sarco Type
\"IT\".

2\. 2 Inches and Larger Y Style: Class 250, cast iron, flanged, with
perforated stainless steel screen (2\" to 3\", 0.033\" perforations for
steam or water; 4\" to 6\", 0.045\" perforations for steam, .125\"
perforations for water; 8\" to 16\", 0.062\" perforations for steam,
0.125\" perforations for water). Spirax-Sarco Type CI-125 or AF-250.

H. Traps:

1\. Thermostatic, for saturated steam service: Angle, vertical or
horizontal, brass or stainless steel body, screwed union type, stainless
steel bellows, replaceable stainless steel seat. Spirax-Sarco Types
TS-25, T-65 and T-125.

2\. Float - Thermostatic, for saturated steam service: Class 200 iron
body, all stainless steel interior components, screwed. Spirax-Sarco
Types FT-10, FT-32 or FT-550 with ST-14 or ST-17 sensor chamber.

3\. Thermodynamic, for saturated steam service: Class 300 stainless
steel body, hardened stainless steel working surfaces, with integral 20
mesh stainless steel screen and 1/4\" blow down valve, screwed.
Spirax-Sarco TD-S-52 or TD-42 with ST-17 sensor chamber.

## 2.03 [MATERIALS FOR SPACE HEATING, CHILLED]{.underline} [WATER,]{.underline} [TOWER WATER, AND OTHER HYDRONIC SYSTEMS]{.underline}

A. Piping:

1\. Aboveground:

a\. 2 Inches and Smaller: Schedule 40 black steel, welded (Type E) or
seamless (Type S), ASTM A53, Grade A or B, or Type L hard drawn copper
tubing, ASTM B88.

b\. 2-1/2 Inches and Larger: Schedule 40 black steel, welded (Type E) or
seamless (Type S), ASTM A53, Grades A or B.

2\. Underground: Schedule 40 black steel, seamless Type S or welded Type
E, Grade A or B, ASTM A53.

a\. Joints: All joints in underground piping shall be welded, using
Schedule 40 forged steel butt-weld fittings. All welding shall conform
with the requirements of Standard Specification, Section 15050-S,
General Material and Work Requirement, Mechanical. Use of unions
underground is prohibited. Joints shall be wrapped with Scotchwrap No.
51 as manufactured by Minnesota Mining and Manufacturing Co.

b\. Protective pipe covering shall be mechanically applied in a factory
or field plant especially equipped for the purpose.

c\. Special fittings which cannot be coated mechanically shall have the
protective covering applied by hand. Hand-applied covering shall be
equal in coating thickness and coating effectiveness to that of the
mechanically applied covering. The pipe covering material shall be
Scotchkote No. 101 pipe coating resin, as manufactured by Minnesota
Mining and Manufacturing Co., or X-Tru Coat as manufactured by Standard
Pipe Protection, Inc.

B. Fittings:

1\. 2 Inches and Smaller: Class 150 banded malleable iron, screwed, ANSI
B16.3; wrought copper and bronze solder-joint, ANSI B16.22; or Schedule
40 wrought steel butt-weld fittings, ANSI B16.9.

2\. 2-1/2 Inches and Larger: Schedule 40 wrought steel butt-weld
fittings, ANSI B16.9.

C. Flanges: Butt-weld or slip-on, full face.

1\. 2 Inches and Smaller: Class 150, forged steel, screwed, ANSI B16.5.

2\. 2-1/2 Inches and Larger: Class 150, forged steel welding neck, ANSI
B16.5.

D. Gaskets: 0.175\" thick with 1/8\" solid-metal stay ring. Material is
304 stainless steel with chlorocarb graphite filler. Flexitallic, Style
CG or Lamons Spiraseal Style WR.

E. Bolts and Nuts: Bolts shall conform to ASTM A193, Grade B7. Nuts
shall conform to ASTM A194, Grade 2H.

F. Valves:

1\. Gate:

a\. 2 Inches and Smaller: Class 150, threaded ends, bronze body, rising
stem, screwed bonnet, solid wedge disc. Crane No. 428.

b\. 2-1/2 Inches and Larger: Class 150, flanged ends, OS&Y, iron body,
bronze trim, rising stem inside thread. Crane No. 465-1/2.

2\. Ball:

a\. 2 Inches and Smaller: Class 150, bronze body, blow-out proof captive
stainless steel stem, double teflon seals and seats, full ported
stainless steel ball. Nibco T-585, 2-piece, threaded ends; Nibco
S-595-Y-66, 3-piece, swing-out body, solder ends.

b\. 2-1/2 Inches and Larger: Class 150, flanged ends, carbon steel body
with 316 stainless steel trim, blow-out proof captive stainless steel
stem and ball, double teflon seals and seats. Nibco F510 Series.

3\. Globe:

a\. 2 Inches and Smaller: Class 125, screwed ends, bronze body, inside
screw, screw-in bonnet, renewable seat and disc. Nibco T-211.

b\. 2-1/2 Inches and Larger: Class 125, iron body comforming to ASTM
A126, Class B, bronze trim, flanged ends, bolted bonnet, bronze disc,
replacable seats. Crane No. 351.

4\. Plug:

a\. 2 Inches and Smaller: Class 150, iron body, threaded ends, resilient
PTFE sleeve and tapered plug for tight shut-off, non-lubricated. Xomox
Tufline Model 066.

b\. 2-1/2 Inches and Larger: Class 150, iron body, flanged ends,
resilient PTFE sleeve and tapered plug for tight shut-off,
non-lubricated. Xomox Tufline Models 067 or 067EG.

5\. Butterfly: 2-1/2 Inches and Larger: Class 200, iron body,
aluminum/bronze disc, stainless steel shaft, resilient seat, O-ring
seals, lug type for dead-end service, lever operator. Nibco LD 2000-5.

6\. Check, Swing:

a\. 2 Inches and Smaller: Class 125, threaded ends, bronze body, Y
pattern, screw cap. Crane No. 37.

b\. 2-1/2 Inches and Larger: Class 150, flanged, bolted bonnet,
B61-bronze trim or 316 stainless steel trim. Nibco F-938.

7\. Check, Vertical: 2 Inches and Smaller: Class 125, threaded ends,
bronze body, spring actuated, inline lift type, TFE seat ring. Nibco
T-480-Y.

8\. Needle: 1 inch and smaller, positive shut-off for gages, brass.
Whitey \"O\" Series.

G. Strainers:

1\. 2 Inches and Smaller: Threaded ends, cast iron body with screwed
cap, 20 mesh monel screen for water service. Spirax-Sarco Type \"IT\".

2\. 2-1/2 Inches and Larger: Flanged ends, cast iron body and bolted
cap, 20 mesh monel screen for water service. Spirax-Sarco Type CI-125.

H. Flexible Connectors:

1\. General

a\. 2 Inches and Smaller: Threaded ends, corrugated inner tube and wire
braid outer shield, Type 321 stainless steel. MetraFlex M/L or S/L.

b\. 2-1/2 Inches and Larger: Flanged ends, corrugated inner tube and
wire braid outer shield, Type 321 stainless steel. MetraFlex M/L or S/L.

2\. Coils

a\. 2 Inches and Smaller: Threaded ends, NPT solid male one end and NPT
female union on the other end, 24-inch length, type 321 stainless steel
hose with deep spiral, close pitch convolutions in welded base tube,
stainless steel wire braid (150 psi rating). McMaster-Carr #549OK52
(2-inch ID) to #549OK13 (1/4-inch OD).

I. Glycol-Resistant Materials: All materials installed in a system
containing a water/glycol solution shall be resistant to (compatible
with) glycol. Suitable materials include steel, iron, and bronze (red
brass).

## 2.04 [MATERIALS FOR NATURAL GAS SYSTEMS (Aboveground)]{.underline}

A. Piping: Schedule 40 black steel, seamless Type S or welded Type E,
ASTM A53, Grade A or B.

B. Fittings:

1\. 2 Inches and Smaller: 150-pound banded malleable iron, screwed, ANSI
B16.3.

2\. 2-1/2 Inches and Larger: 150-pound banded malleable iron, screwed,
ANSI B16.3, or Schedule 40 wrought steel butt-weld fittings, ANSI B16.9.

C. Valves:

1\. Plug: Class 150, iron body, flanged or threaded ends, resilient PTFE
sleeve and tapered plug for tight shut-off, non-lubricated. Xomox
Tufline Models 066, 067, or 067EG.

2\. Needle: 1 inch and smaller, positive shut-off for gages, brass.
Whitey \"O\" Series.

D. Flexible Connectors: Stainless steel, corrugated, AGA certified for
indoor and outdoor use. Dormont Manufacturing Co., SSC Series, N and NP.

## 2.05 [MATERIALS FOR COMPRESSED AIR SYSTEMS (200 psig and under)]{.underline}

A. Piping:

1\. Aboveground:

a\. 2 Inches and Smaller: Schedule 40 black steel, seamless Type S or
welded Type E, Grade A or B, ASTM A53; or Type L hard-drawn copper
tubing, ASTM B88.

b\. 2-1/2 Inches and Larger: Schedule 40 black steel, seamless Type S or
welded Type E, Grade A or B, ASTM A53.

B. Fittings:

1\. 2 Inches and Smaller: Class 150 banded malleable iron, screwed, ANSI
B16.3; Schedule 40 wrought steel butt-weld fittings, ANSI B16.9; or
wrought copper and bronze braze-joint, ANSI B16.22, ASTM B88.

2\. 2-1/2 Inches and Larger: Schedule 40 wrought steel butt-weld
fittings, ANSI B16.9.

C. Flanges:

1\. Flanges 2 inches and smaller shall be Class 150 bronze flanges, ANSI
B16.24, or Class 150 forged steel flanges conforming to ANSI B16.5.

2\. Flanges 2-1/2 inches and larger shall use Class 150, forged steel
flanges conforming to ANSI B16.5 limitations on bolting in 5.3, 6.4, and
on gaskets in 5.4, and are properly aligned and assembled. See also 2.4,
Temperature Considerations.

D. Gaskets:

1\. For steel flanges: 0.175\" thick with 1/8\" solid-metal stay ring.
Material is 304 stainless steel with chlorocarb graphite filler.
Flexitallic Style CG or Lamons Spiraseal Style WR.

2\. For bronze flanges: 0.175\" thick with 1/8\" solid-metal stay ring.
Material is copper with chlorocarb graphite filler. Flexitallic Style CG
or Lamons Spiraseal Style WR.

E. Bolts and Nuts: Bolts shall conform to ASTM A193, Grade B7. Nuts
shall conform to ASTM A194, Grade 2H.

F. Flexible Connectors:

1\. 2 Inches and Smaller: Threaded ends, corrugated inner tube and wire
braid outer shield, Type 321 stainless steel. MetraFlex M/L or S/L.

2\. 2-1/2 Inches and Larger: Flanged ends, corrugated inner tube and
wire braid outer shield, Type 321 stainless steel. MetraFlex M/L or S/L.

G. Valves:

1\. Gate:

a\. 2 inches and smaller: Class 150, threaded ends, bronze body, rising
stem, union bonnet. Crane No. 431.

b\. 2-1/2 inches and larger: Class 150, flanged ends, iron body, bronze
trim, bolted bonnet, rising stem. Nibco CS-102.

2\. Globe:

a\. 2 Inches and Smaller: Class 150, threaded ends, bronze body, rising
stem, union bonnet. Crane No. 7TF.

b\. 2-1/2 Inches and Larger: Class 150, flanged ends, cast steel, OS&Y,
bolted bonnet. Nibco CS-132-U.

3\. Plug: Class 150, iron body, flanged or threaded ends, resilient PTFE
sleeve and tapered plug for tight shut-off, non-lubricated. Xomox
Tufline Fig. 066, 067 or 067EG.

4\. Check Valves: Nupro Series C, CP. Series P used for manual purge of
manual vent.

5\. Ball:

a\. 2 Inches and Smaller: Class 150, bronze body, blow-out proof captive
stainless steel stem, double teflon seals and seats, full ported
stainless steel ball. Nibco T-585, 2-piece, threaded ends; Nibco
S-595-Y-66, 3-piece, swing-out body, solder ends.

b\. 2-1/2 Inches and Larger: Class 150, flanged ends, carbon steel body
with 316 stainless steel trim, blow-out proof captive stainless steel
stem and ball, double teflon seals and seats. Nibco F510 Series.

6\. Needle: 1 inch and smaller, positive shut-off for gages, brass.
Whitey \"O\" Series.

## 

## 

## 

##  

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 

## 2.07 [EQUIPMENT]{.underline}

A. General: Equipment required for installation on this contract shall
be as specified on the applicable contract drawings and shall be
furnished complete with all accessories normally supplied with the
catalog item listed and all other accessories necessary for a complete
and satisfactory operating system.

B. Compressed Air Receivers:

1\. Receiver shall conform to the ASME Boiler and Pressure Vessel Code
requirements for unfired pressure vessels including the following
specific requirements:

a\. Joint efficiencies, E, used in the design of the receiver shall be
selected in accordance with UW-12(c).

b\. Welded joints shall be examined radiographically for their full
length in accordance with UW-51.

2\. Receiver shall be National Board registered and so stamped.

3\. Receiver shall be equipped with shut-off valve, ASME-rated pressure
relief valve, automatic drain valve, manual-bypass drain valve, pressure
gage with cock, pressure switch, and any other appurtenances required
for satisfactory operation. Size and capacity shall be as listed on the
drawings.

4\. Two copies of the manufacturer\'s data report shall be submitted to
the Sandia Delegated Represenative (SDR).

5\. See Drawing Schedule for additional information.

C. Pressure Relief Valves: Valves shall be ASME stamped and National
Code certified. The valves shall be factory set to maintain an operating
or standby pressure as directed or noted.

D. Thermometers and Thermowells: Thermometers shall be the molecular
sieve, bourdon tube type, direct or remote mounted with a stainless
steel case. Each thermometer shall be provided with a separable
thermowell consisting of a 3/8\" stainless steel bore, plug, and chain.
The well shall be the length required for accurate reading of the
thermometer. Where thermometers occur in the insulated piping systems,
or on insulated equipment, extension necks shall be provided so that the
thermometer casing will be outside of the insulation. Ashcroft Duratempe
Type 600.

E. Gages: Gages shall be safety-type with rear blowout plug or panel,
clear plastic cover, and sides and front consisting of one integral
part. Range shall be at least 1.2 times the system relief pressure.
Gages shall be installed with snubbers and 1/4\" bronze needle valves.
All gages for steam systems shall be provided with siphon tubes and
snubbers.

F. Pressure Powered Pumps: Pressure powered pumps shall be simplex type
by Spirax-Sarco or approved equal. Packaged unit shall include
prepiping, receiver, cycle counter, insulation cover, stainless steel
check valves, and gage glass with brass cocks. See Drawing Schedule for
additional information.

G. Air Compressor: Air compressor shall be electric motor driven, single
stage, rotary screw compressor, completely piped, wired and base-plate
mounted. The air compressor shall be self-contained. The air compressor
shall include the following: duplex tapered roller bearing at the
air-end, two-stage coolant separation system, ODP induction motor,
v-belt drive idler-tensioning, full-voltage starter, start/stop
switches, 75 dBA finished enclosure according to ANSI S5.1, air filter
indicator, air-cooled coolant cooler with fan drive, steel baseplate for
fork truck operation, minimum pressure check valve, air/coolant pressure
relief valve, mounted and prepiped combination separator and drain trap,
and digital control system. The digital control system shall include a
digital display, touch panel and alarm annunciation. The display shall
show: discharge pressure, discharge temperature, sump pressure,
separator pressure, and running and loaded hours. The touch panel shall
permit: set off-line and on-line pressure, set automatic restart time,
and set maximum discharge air temperature. The alarm annunciation shall
identify the following situations: motor starter malfunction, motor
overload, low voltage, high discharge air temperature, high discharge
air pressure, pressure sensor malfunction, microprocessor malfunction,
and temperature sensor malfunction. See Drawing Schedule for additional
information.

H. Refrigerated Air Dryer: The refrigerated air dryer shall meet NFPA
codes. The refrigerated air dryer shall have a direct expansion
(noncycling) type refrigeration system. The refrigerated air dryer shall
be equipped with thermostatic control, hot gas by-pass valves,
air-cooled condenser, inlet air pre-cooler/reheater heat exchanger, heat
exchanger, system monitor, finished enclosure, filter/dryer, and
insulation. The system monitor shall provide a 16-character LED display
identifying the following temperatures: inlet air, refrigerant suction,
refrigerant discharge, and ambient air. The system monitor shall be used
to set the automatic drain valve. The system monitor shall alarm
nonstandard (factory set) temperature conditions. The system monitor
shall have the following additional indicators: normal operation, check
operating conditions, service due, and system alarm. The refrigerated
air dryer shall be provided with a 2-year warranty. See Drawing Schedule
for additional information.

I. Compressed Air Filters: The compressed air filter shall be provided
to remove solid particles, liquid water, liquid oil, and oil mists. The
filter shall have a theoretical efficiency greater than 99.9999 percent
and be capable of removing particles as small as 0.01 microns. The
compressed air filter shall consist of a polypropylene support core and
multiple layers of polyester and borosilicate coalescing medium. Initial
pressure drop of the compressed air filter at 100 psig and rated flow
shall not exceed 1.0 psi. The compressed air filter shall be provided
with a maintenance indicator for indication of element replacement. The
air flow direction within the element shall be from inside to outside.
Maximum design pressure shall be 150 psig, and the element shall
withstand 30 psi differential surges. The minimum element differential
burst pressure shall be 100 psi. A relief valve connection shall be
provided. See Drawing Schedule for additional information.

J. Automatic Drain Valve (compressed air system): The automatiac drain
valve shall not require operator attention. The automatic drain valve
shall provide drain cycle frequency and drain cycle duration
adjustments. The automatic drain valve shall have the following
features: 1/4-inch NPT air connections, 3-wire grounded power cord, 115
Volt requirement, weatherproof/dust-proof construction, nonclogging
full-port drain orifice, 35 to 180 degrees F operating fluid
temperature, 35 to 120 degrees F ambient air conditions, operating
pressure of 3 psig, and a maximum pressure of 300 psig. Deltech Series
1700 or approved equal.

K. Vacuum Pump: The vacuum pump shall have the following features: 110
scfm, 6 inches Hg, 4 inches OD Inlet, 6 inches OD Outlet, 39 square foot
filter area, 460 V/3 φ/60 Hz, 5 hp TEFC motor. Provide two, 1
1/2-inch-diameter, 20-foot-long hoses. Spencer SA-505A or approved
equal.

L. Basket Strainer: Basket Strainer shall have 8-inch flanged
connections and 20-mesh screen. Strainer shall be floor mounted with
bottom drain plug and top flanged opening for lifting basket. Armstrong
SU-2 or approved equal.

M. Air Separators: Chilled water system, heating water system, and
process cooling water system air separators shall have tangential inlet
and outlet nozzle connections, bottom blowdown connection, galvanized
steel strainer, perforated stainless steel air collector tube with top
connection to compression tank. Bell and Gossett Rolairtrol R-Series or
approved equal.

N. Expansion Tanks: Chilled water system, heating water system, and
process cooling water system expansion tanks shall be ASME rated
precharged diaphragm-type pressure vessels. Tank shall be carbon steel
and equipped with heavy duty butyl rubber diaphragm. Bell and Gossett
Series "D" pressurized horizontal expansion tank or approved equal.

O. Water Filters: Process cooling water filters shall have carbon steel
ASME designed and stamped housings internally coated with a rust
preventative and externally coated with oil-resistant paint. Housing
shall have 3-inch flanged connections and Viton "A" gaskets. Housing
shall contain four 40-inch polypropylene filter cartridges. Filter
cartridges shall remove 100 percent of 40-micron particles and 99.9
percent of 35-micron particles. Pall Profile P04 series housings with
Pall Profile II filter elements or approved equal. PART 3 - EXECUTION

## 3.01 [PIPING INSTALLATION]{.underline}

A. General: Piping installation shall be coordinated, with respect to
space available, with heating, ventilating, air conditioning, exhaust,
and electrical system installation. In every instance where there is a
conflict in the routing of the piping and the ducting, the routing of
the ducting shall govern. Installed piping shall not interfere with the
operation or accessibility of doors or windows; shall not encroach on
aisles, passageways, and equipment; and shall not interfere with the
servicing or maintenance of equipment. Pipe shall be cut accurately to
measurements established at the construction site and shall be worked
into place without springing or forcing, properly clearing all openings
and equipment. Cutting or weakening of structural members to facilitate
piping installation is not permitted. Pipes shall have burrs removed by
reaming and shall be so installed as to permit free expansion and
contraction without damage to joints or hangers. Piping above ground
shall be run parallel with the lines of the building unless otherwise
noted on the drawings. Unless otherwise shown on the drawings,
horizontal piping shall pitch down in the direction of flow with grade
of not less than 1 inch in 40 feet. Service pipe, valves, and fittings
shall be located a sufficient distance from other work to permit the
installation of the finished covering not less than 1/2 inch from such
other work, and not less than 1/2 inch between the finished covering on
the different services.

B. Reducers: Reduction in pipe sizes shall be made with one-piece
reducing fittings. Forged bushings will be acceptable ONLY when there is
no room for reducing couplings or swagged nipples and the reduction of
at least two pipe sizes. Bushings shall not be used for fuel gas
service. Only eccentric reducers will be permitted in steam
applications. Cast bushings ARE NOT acceptable.

C. Unions: All piping unions shall be of the ground joint type,
constructed from materials equivalent in alloy composition and strength
to other fittings specified with which they are used. Union pressure
classes and end connections shall be the same as the fittings used in
the lines with the unions.

1\. Steel unions shall have hardened stainless steel seating surfaces on
both faces.

2\. Dielectric unions shall be used to connect dissimilar metals (such
as steel to copper) to prevent electrolytic action.

D. Installation of Valves: Valves shall be installed at the locations
shown on the drawings and where specified. Gate valves shall be used
unless otherwise shown, specified, or directed by the Sandia Delegated
Representative (SDR). All valves shall be installed with their stems
horizontal or above and with sufficient clearance to allow the
inspection and repair of two-piece and three-piece valves in place. All
screwed valves shall be installed with a down stream union.

E. Hangers and Anchors:

1\. All piping shall be rigidly supported from the building structure
(WELDING TO BUILDING STRUCTURE WILL NOT BE PERMITTED, except as shown on
the pipe support drawings.) Where pipes run side by side, support on rod
and angle iron trapeze hangers. Hanger spacing shall be as follows:

a\. Horizontal:

> [Steel Piping]{.underline} [Maximum Spacing]{.underline}
>
> 3/8\" and smaller 4\'-0\"
>
> 1/2\" through 1\" 7\'-0\"
>
> 1-1/4\" through 4\" 10\'-0\"
>
> 5\" through 8\" 16\'-0\"
>
> 10\" and larger 20\'-0\"
>
> [Copper Piping]{.underline} [Maximum Spacing]{.underline}
>
> 3/8\" and smaller 4\'-0\"
>
> 1/2\" through 3/4\" 6\'-0\"
>
> 1\" through 1-1/2\" 8\'-0\"
>
> 2\" and larger 10\'-0\"

b\. Vertical: Steel and copper piping shall be supported at 10\'-0\"
intervals, maximum.

2\. Round rods supporting the pipe hangers shall be of the following
dimensions:

> 3/8\" to 2\" pipe 3/8\" rod
>
> 2-1/2\" to 3\" pipe 1/2\" rod
>
> 4\" to 5\" pipe 5/8\" rod
>
> 6\" pipe 3/4\" rod
>
> 8\" through 12\" 7/8\" rod
>
> 14\" through 16\" 1\" rod

3\. Rods for trapeze hangers shall be a minimum of 3/8 inch and shall
have the equivalent cross section, listed in 3.01.E.2, per pipe
supported. The use of pipe hooks, chains, perforated iron strapping or
wire for pipe supports will not be permitted.

4\. Hanger rods shall be galvanized carbon steel per ASTM A307, Grade B,
threaded per ANSI B1.1 coarse thread series, Class 2A fit:

a\. Hanger rods shall have minimum 6\" threaded ends.

b\. All hanger rod connections shall use double nut fastening.

5\. Hanger rods shall be installed vertically. No offset in hanger rod
will be permitted.

6\. Place a hanger within 1\'-0\" of each horizontal elbow.

7\. Use hangers which are vertically adjustable 1-1/2\" minimum after
piping is erected.

8\. Use copper straps on copper pipe and ferrous hangers on ferrous
pipe.

9\. Soft copper tubing, where permitted, shall be fastened to the
building structure with Unistrut type clamps and spaced not more than
4\'-0\" apart.

10\. On 4\" and larger piping, install hangers adjacent (within 1\'-0\"
on each side) to all horizontal elbows, strainers, check valves, valves,
and all flanged items.

11\. Do not use \"C\" clamp style hanger..

F. Piping Equipment Supports and Fastenings: Fixtures and equipment
shall be solidly supported and securely fastened. Installation shall
include suitable backing to anchor all hanging fixtures and equipment.

G. Air Vents (For Closed Water Systems):

1\. Manual: Where air vent locations are 8\'-0\" or more above the
floor, 1/4-inch O.D. copper tubing shall be installed at the point of
venting and extended down with the needle valve installed 7\'-0\" above
the floor for easy access.

2\. Automatic Air Vents: Automatic air vents shall be size 1/2 inch, 150
psi maximum operating pressure. A manual shutoff valve shall be
installed [ahead]{.underline} of each automatic air vent. Body of brass,
for use on hot or cold water, with threaded outlet for 1/4\" O.D. copper
tube.

3\. Each branch and main system high point shall be vented with a manual
vent, after installation, as required to permit removal of all air from
the system.

H. Equipment Connections: All piping connections to pumps and other
equipment shall be installed without strain at the pipe connection of
the equipment. The Contractor shall be required as directed by the
Sandia Delegated Represenative (SDR) to remove the bolts in flanged
connections or disconnect piping to demonstrate that the piping has been
so connected. Pipe connections to equipment shall be made with unions or
flanged fittings.

I. Joints:

1\. Flanged Joints: All flanged joints shall be face matched. Raised
face flanges shall not be mated to flat-faced cast-iron flanges on
valves or equipment. The raised face must be machined flush. All flange
bolt holes shall straddle the horizontal and vertical centerlines unless
otherwise noted. Bolting shall comply with ANSI/ASME B31.1, Power
Piping. Torque values and tightening sequence for bolts shall be in
accordance with flange manufacturer\'s instructions.

> Install insulating kits on flanges connecting dissimilar metals (such
> as steel to copper) to prevent electrolytic action.
>
> The following procedure shall be followed when making final assembly
> of a bolted flange joint.

a\. Install the gasket on the gasket seating surface and bring the cover
flange in contact with the gasket.

b\. Install all bolts, making sure they are free of dirt and grit, and
are well lubricated.

c\. Run-up all nuts finger tight.

d\. Develop the required torque in each bolt in a minimum of four steps:

1\) The first sequence shall set the bolts at 30% of the required
torque. Damage to the gasket can result beyond this amount for the first
sequence.

2\) The second sequence shall set the bolts at 60% of the required
torque.

3\) The third sequence shall set the bolts at 90% of the required
torque.

4\) The fourth sequence shall set the bolts at 100% of the required
torque. A final tightening should be performed in a clockwise
bolt-to-bolt sequence to ensure that all bolts have been evenly
stressed.

> By following the above steps, a reasonably even compressive force can
> be exerted on the gasket. For low-pressure applications, exacting
> torque values for bolts are not required. Instead, it is much more
> important that each bolt is fairly evenly stressed.

2\. Screwed Joints: Screwed pipe joints shall have American Standard
Taper Pipe Threads ANSI-B1.2. Care shall be taken that the inside of
pipe is thoroughly clean and free of cutting oil and foreign matter
before installation. Metal screwed pipe joints shall be made leak-tight
by the use of Teflon tape and approved Teflon thread sealing and
lubricating compound.

3\. Nitrogen Purge: A dry nitrogen purge is required inside piping or
tubing during brazing.

a\. Purge manifold shall be fabricated to the same specification as the
piping system.

b\. For continuous runs of piping, brazing shall begin at the purge port
area and continue through the system. The purge connection shall not be
changed. Use purge restrictor at end of piping run. Stainless steel
compression fittings with nylon ferrules can be used for temporary
restriction on tees and tube ends.

c\. Do not begin brazing until piping is fully purged of air.

d\. While brazing, the minimum purge rate shall be 15 SCFH for 1/4 inch
piping, 25 SCFH for piping through 3/4 inch, and 35 SCFH for larger
piping.

e\. Purge shall continue after conpletion of braze until joint is cool
enough to touch with bare hands.

4\. Brazed/Solder Joints:

a\. Cut tube ends square. Ream, remove burrs, and size.

b\. All joints, in compressed air service, greater than 60 psig or
service temperatures (any media) greater than 200oF, shall be brazed.

c\. Brazed copper to copper joints shall be made with a silver brazing
alloy conforming to AWS A5.8, BCuP-5 (15% silver). Joints shall comply
with ANSI/ASME B31.1 Power Piping.

d\. Brazed copper to brass, or copper to stainless steel joints shall be
made with a silver brazing alloy conforming to AWS A5.8, BAg-7 (45%
silver). Joints shall comply with ANSI/ASME B31.1 Power Piping.

e\. All solder joints, for copper tubing, shall be made with 95-5
tin-antimony solder with the following exception:

> Solder containing antimony SHALL NOT be used to join metals containing
> zinc (e.g., galvanized iron, galvanized steel, and brass).

f\. Solder end valve: Use two-piece gate or globe valve or three-piece
ball valve for solder end valves. When joining a gate or globe solder
end valve, ensure valve is fully open. Apply heat to tube first.
Transfer as much heat as possible through the tube to the valve. Avoid
prolonged heating of valve. Use a non-corrosive paste flux and solid
wire solder suitable for the service temperatures and pressures
expected.

g\. Use sand cloth or a steel wire brush to clean surfaces to be joined.
Steel wool IS NOT permitted.

5\. Welded Joints: All pipe surfaces shall be thoroughly cleaned before
welding. Each joint, except socket-weld joints, shall be beveled before
being welded. The Contractor shall provide an approved, non-asbestos mat
or blanket to protect the structure and adequate fire protection
equipment at all locations where welding is done. Welding sockets or
weldolets may be used in lieu of reducing outlet tees for branch
connections up to one-half the size of the main run. On connections
larger than one-half the size of the main run, welding tees shall be
used. The use of fittings formed from welded pipe sections IS NOT
PERMITTED.

J. System Drains: Drains indicated on the drawings in connection with
water distribution systems shall be 1/2\" bronze valves (gate) with
bronze caps or plugs, unless otherwise noted. Additional drains shall be
installed at low points on the hot water, chilled water, process cooling
water, and tower water piping to insure proper draining of the system,
and all piping shall pitch to the drains. Hose bibbs (3/4\") shall be
provided as drain valves at low points.

K. Discharge from pressure relief valves shall be piped full-size and
extended to the outside of the building structure, unless otherwise
shown on the drawings.

L. Insulation of all pipes, valves, fittings, and equipment shall be in
accordance with Standard Specification, Section 15250-S, unless noted
otherwise on the drawings.

M. Identification and Labels: All piping systems shall be labeled and
identified in accordance with Standard Specification, Section 15050-S.

N. Cross-Connection Prevention:

1\. A backflow prevention device approved by the Foundation for Cross
Connection Control and Hydraulic Research, University of Southern
California (USC-FCCCHR) and IAPMO shall be installed at all piping,
equipment, and temporary fill connections that establish a
cross-connection between a potable water system and a polluted or
contaminated system such as a drainage system, ethylene glycol solution,
or fire protection system.

2\. All hose bibbs shall be protected with an approved (USC-FCCCHR and
IAPMO) integral vacuum breaker device.

3\. All piping downstream of any backflow prevention device shall be
labeled \"Non-Potable Water\" or NPW in accordance with Standard
Specification, Section 15050-S.

4\. All backflow prevention devices installed under this contract shall
be tested by a \"Certified Backflow Assembly Tester\" who possesses a
current (within three (3) years from date of issuance) certificate that
confirms successful completion of an approved (USC-FCCCHR or Colorado
Environmental Training Center, Golden, Colorado) training course.

5\. The Contractor shall provide testing of all backflow prevention
devices installed under this contract and submit documentation of
testing to the Sandia Delegated Represenative (SDR).

O. Compressed Air Receivers: Install receiver with sufficient clearance
to allow access to manhole or armhole.

## 3.02 [TESTS]{.underline}

A. General:

> Before insulation is applied, all piping, equipment,and accessories
> installed under this contract shall be inspected and pressure tested
> by the Contractor in the presence of the Sandia Delegated
> Representative (SDR) and approved before acceptance. All labor,
> material, and equipment required for testing shall be furnished by the
> Contractor. The Contractor shall be responsible for all repairs and
> retesting as required. All instruments and other equipment whose safe
> pressure range is below that of the test pressure shall be removed
> from the line or blanked off before applying the tests. Prior to
> performing tests, all lines shall be blown free of all loose dirt and
> foreign particles. The lines shall then be thoroughly flushed with
> water (liquid lines only) or compressed air (for gas lines) at a
> sufficient flow rate and period of time to insure complete cleaning on
> the line of all dirt, scale, and foreign matter. Cleaning and flushing
> of the lines shall be subject to approval by the SDR. After testing
> and flushing lines, all filters and strainers shall be cleaned: all
> fine-mesh throw-away start-up strainers at suction diffusers shall be
> removed, and all cooling tower pump strainers shall be removed..

B. Testing:

1\. Steam, condensate, heating water, chilled water, process cooling
water, high temperature cooling water, and tower water piping shall be
tested hydrostatically at the test pressures specified and shall show no
drop in pressure in a 2-hour period.

2\. Natural gas and compressed air piping shall be tested using
compressed air or dry nitrogen, as indicated at the test pressures
specified and shall show no drop in pressure in a 2-hour period; gas
leaks shall be located by soap testing.

C. Test Pressures:

> Unless otherwise specified, hydrostatic test pressure shall be 1.5
> times the system operating pressure, pneumatic test pressure shall be
> 1.25 times system operating pressure, or as noted below.

TEST PRESSURE (psig)

[SYSTEM]{.underline} [Hydrostatic]{.underline} [Pneumatic]{.underline}

> Steam System (125 psig) 225 \--
>
> Steam System (30 psig & less) 50 \--
>
> Condensate System 100 \--
>
> Space Heating Water, Chilled
>
> Water, Tower Water,
>
> Process Cooling, and High
>
> Temperature Cooling Water
>
> Systems 100 \--
>
> Natural Gas System \-- 25
>
> Compressed Air System \-- 250

## 3.30 [COMMISSIONING]{.underline}

A. Provide labor, material, equipment, etc., required to facilitate the
commissioning process. Perform form tests and verification procedures
required by the commissioning process when requested by the
Commissioning Authority and directed by the General Contractor. See
Section 15995.

END OF SECTION