232111 BOILER PLANT PIPING SYSTEMS seismic.pdf

UPGRADE EMERGENCY POWER IN BUILDING 138

VAMC, MARION, IN PROJECT: 610-16-104

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SECTION 23 21 11

BOILER PLANT PIPING SYSTEMS

PART 1 - GENERAL

1.1 DESCRIPTION

A. Piping systems for generator including fuel oil an d piping supports.

1.2 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS.

B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

C. Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREM ENTS.

D. Section 09 91 00, PAINTING.

E. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FO R NON-STRUCTURAL

COMPONENTS.

F. Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

G. Section 23 05 51, NOISE AND VIBRATION CONTROL FOR B OILER PLANT.

H. Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC.

I. Section 23 07 11, HVAC AND BOILER PLANT INSULATION.

J. Section 23 10 00, FACILITY FUEL OIL SYSTEMS

1.3 APPLICABLE PUBLICATIONS

A. The publications listed below form a part of this s pecification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standard will govern.

B. American Society of Civil Engineers (ASCE):

25-2006.................Earthquake-Actuated Automat ic Gas Shutoff

Devices

C. American Society of Mechanical Engineers (ASME):

B16.3-2011..............Malleable Iron Threaded Fit tings: Classes 150 and 300

B16.5-2013..............Pipe Flanges and Flanged Fi ttings: NPS 1/2

Through NPS 24 Metric/Inch Standard

B16.9-2018..............Factory Made Wrought Buttwe lding Fittings

B16.11-2016.............Forged Fittings, Socket-Wel ding and Threaded

B16.22-2018.............Wrought Copper and Copper A lloy Solder-Joint

Pressure Fittings

B16.34-2017.............Valves Flanged, Threaded an d Welding End

B31.1-2014(R2017).......Power Piping

B31.9-2014/.............Building Services Piping

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ASME Boiler and Pressure Vessel Code (BPVC):

BPVC Section I-2019.....Rules for Construction of P ower Boilers

BPVC Section VIII-2019 Rules for Construction of Pr essure Vessels

BPVC Section IX-2019 Welding, Brazing, and Fusing Q ualifications

D. ASTM International (ASTM):

A47/A47M-2018...........Standard Specification for Ferritic Malleable

Iron Castings

A53/A53M-2018...........Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and

Seamless

A105/A105M-2018.........Standard Specification for Carbon Steel

Forgings for Piping Applications

A106/A106M-2019.........Standard Specification for Seamless Carbon

Steel Pipe for High-Temperature Service

A193/A193M-2019.........Standard Specification for Alloy-Steel and

Stainless-Steel Bolting for High Temperature or

High-Pressure Service and Other Special Purpose

Applications

A194/A194M-2018.........Standard Specification for Carbon Steel, Alloy

Steel, and Stainless-Steel Nuts for Bolts for

High Pressure or High-Temperature Service, or

Both

A197/A197M-2019.........Standard Specification for Cupola Malleable

Iron

A216/A216M-2018.........Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, For High-

Temperature Service

A234/A234M-2018a........Standard Specification for Piping Fittings of

Wrought Carbon Steel and Alloy Steel for

Moderate and High Temperature Service

A269/A269M-2019.........Standard Specification for Seamless and Welded

Austenitic Stainless-Steel Tubing for General

Service

A395/A395M-R2018........Standard Specification for Ferritic Ductile

Iron Pressure-Retaining Castings for Use at

Elevated Temperatures

B62-2017................Standard Specification for Composition Bronze or Ounce Metal Castings

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B88-2016................Standard Specification for Seamless Copper

Water Tube

E. American Welding Society (AWS):

B2.1/B2.1M-2014.........Specification for Welding P rocedure and

Performance Qualification

Z49.1-2012..............Safety in Welding and Cutti ng and Allied

Processes

F. California Referenced Standards Codes (CRSC):

Title 24 Part 12-2016

G. Manufacturers Standardization Society of the Valve and Fittings

Industry (MSS):

SP-45-2014/.............Bypass and Drain Connection s

SP-58-2018..............Pipe Hangers and Supports - Materials, Design, Manufacture, Selection, Application, and

Installation

SP-80-2013..............Bronze Gate, Globe, Angle a nd Check Valves

SP-97-2019..............Integrally Reinforced Forge d Branch Outlet

Fittings – Socket Welding, Threaded, and

Buttwelding Ends

SP-127-2014a............Bracing for Piping Systems: Seismic – Wind –

Dynamic Design, Selection, and Application

H. National Fire Protection Association (NFPA):

30-2019.................Flammable and Combustible L iquids Code

31-2019.................Standard for the Installati on of Oil-Burning

Equipment

54-2019.................National Fuel Gas Code

85-2019.................Boiler and Combustion Syste ms Hazards Code

I. Pipe Fabrication Institute (PFI):

ES24-2016...............Pipe Bending Methods, Toler ances, Process and

Material Requirements

J. Department of Veterans Affairs (DVA):

H-18-8-2019.............Seismic Design Handbook

1.4 SUBMITTALS

A. Submittals, including number of required copies, sh all be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PR ODUCT DATA, AND

SAMPLES.

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B. Information and material submitted under this secti on shall be marked

“SUBMITTED UNDER SECTION 23 21 11, BOILER PLANT PIP ING SYSTEMS”, with applicable paragraph identification.

C. Manufacturer's Literature and Data including: Full item description and optional features and accessories. Include dimensio ns, weights, materials, applications, standard compliance, model numbers, size, and capacity.

1. Piping:

a. ASTM material specification number.

b. Grade, class or type, schedule number.

c. Manufacturer.

d. Intended service.

2. Pipe Fittings, Unions, Flanges:

a. ASTM material specification number.

b. ASME standards number.

c. Catalog cuts.

d. Pressure and temperature ratings.

e. Intended service.

3. Valves - Gate, Globe, Check, Plug, Butterfly, Ball:

a. Catalog cuts showing design and construction.

b. Pressure and temperature ratings.

c. Materials of construction.

d. Accessories.

e. Intended service.

4. Sight Flow Indicators:

a. Catalog cuts showing design and construction.

b. Pressure and temperature ratings.

c. Materials of construction.

d. Intended service.

5. Quick - Couple Hose Connectors:

a. Catalog cuts showing design and construction.

b. Pressure and temperature ratings.

c. Materials of construction.

d. Type of seal between couplings.

6. Pressure Reducing and Regulating Valves, Back Press ure Relief

Valves, Safety Valves, Relief Valves:

a. Catalog cuts showing design and construction.

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b. Service limitations (type of fluid, maximum pressur e and temperatures).

c. Materials of construction.

d. Flow capacity at required set pressure or different ial pressure.

7. Strainers:

a. Catalog cuts showing design and construction.

b. Pressure and temperature ratings.

c. Materials of construction.

d. Strainer basket or liner mesh size.

e. Pressure loss and flow rate data.

f. Intended service.

8. Emergency Safety Shutoff Valves:

a. Catalog cuts showing design and construction.

b. Maximum pressure rating.

c. Material of construction.

d. Pressure loss and flow rate data.

9. Flexible Connectors:

a. Catalog cuts showing design and construction.

b. Pressure and temperature ratings.

c. Materials of construction.

d. Maximum allowable lateral and axial movements.

e. Description of type of movement permitted, intermit tent offset or continuous vibration.

f. Intended service.

10. Pipe Support Systems: The contractor shall provide the following with submissions.

a. Credentials of technical personnel who will design the support systems.

b. Description of computer program for pipe support se lection indicating its capability and limitations. Provide documentation showing both program verification and validation re sults. List of projects where it was employed successfully.

c. Input and output data for pipe support selection pr ogram for all piping systems with pipe sizes 65 mm (2-1/2 inches) and above.

d. Hanger load calculation methods and results for pip ing systems with pipe sizes 50 mm (2 inches) and below.

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e. Piping layouts showing location and type of each ha nger support and anchors with unique identifiers that can be ref erenced back to the calculation results.

f. Catalog cuts showing design and construction of eac h hanger support and anchor and their conformance to MSS sta ndards.

g. Drawings showing arrangement and sizes of all compo nents comprising each spring-type hanger and support asse mbly.

h. Load rating and movement tables for all spring hang ers, and seismic shock absorbing devices.

D. Complete operating and maintenance manuals includin g wiring diagrams, technical data sheets, information for ordering rep lacement parts, and troubleshooting guide:

1. Include complete list indicating all components of the systems.

2. Include complete diagrams of the internal wiring fo r each item of equipment.

3. Diagrams shall have their terminals identified to f acilitate installation, operation and maintenance.

1.5 QUALITY ASSURANCE

A. Entire installation shall comply with ASME B31.1.

B. Boiler External Piping, as defined in the ASME BPVC Section I, shall be constructed and inspected in conformance with the A SME Code.

C. The products and execution of work specified in thi s section shall conform to the referenced codes and standards as re quired by the specifications. Local codes and amendments shall be enforced, along with requirements of local utility companies. The m ost stringent requirements of these specifications, local codes, or utility company requirements shall always apply. Any conflicts shal l be brought to the attention of the COR.

D. Welding Qualifications: Before any welding is perfo rmed, contractor shall submit a certificate certifying that welders comply with the following requirements:

1. Qualify welding processes and operators for piping according to ASME

BPVC Section IX, AWS Z49.1 and AWS B2.1/B2.1M.

2. Comply with provisions in ASME B31.1.

3. Certify that each welder and welding operator has p assed AWS qualification tests for welding processes involved and that certification is current and recent. Submit documen tation to the

COR.

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4. All welds shall be stamped according to the provisi ons of the

American Welding Society.

E. ASME Compliance: Comply with ASME B31.1 for materia ls, products, and installation. Safety valves and pressure vessels sh all bear appropriate

ASME labels.

1.6 DELIVERY, STORAGE AND HANDLING

A. All piping shall be stored and kept free of foreign material and shall be internally and externally cleaned of all oil, di rt, rust and foreign material. Deliver and store valves and pipe hangers in sealed shipping containers with labeling in place. Storage shall be in dry, protected location.

1.7 INFORMATION ON PRESSURE-TEMPERATURE DESIGN OF PIPING SYSTEMS

A. Fuel oil system pressures are determined by the req uirements of the burners and fuel trains. No. 2 oil systems are desi gned for maximum temperatures of 54 degrees C (130 degrees F), and p ressures of 1034 kPa

(150 psig).

B. Drips, drains, blowdown, water sampling, and chemic al treatment are designed, and materials and equipment are applied i n accordance with the maximum pressure and temperature of the system with which they are associated.

1.8 AS-BUILT DOCUMENTATION

A. Submit manufacturer’s literature and data updated t o include submittal review comments and any equipment substitutions.

B. Submit operation and maintenance data updated to in clude submittal review comments, VA approved substitutions and cons truction revisions shall be in electronic version on CD or DVD and ins erted into a three-ring binder. All aspects of system operation and ma intenance procedures, including applicable piping isometrics, wiring diagrams of all circuits, a written description of system desig n, control logic, and sequence of operation shall be included in the operation and maintenance manual. The operations and maintenance manual shall include troubleshooting techniques and procedures for emerg ency situations.

Notes on all special systems or devices shall be in cluded. A List of recommended spare parts (manufacturer, model number , and quantity) shall be furnished. Information explaining any spec ial knowledge or tools the owner will be required to employ shall be inserted into the

As-Built documentation.

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C. The installing contractor shall maintain as-built d rawings of each completed phase for verification; and, shall provid e the complete set at the time of final systems certification testing. Should the installing contractor engage the testing company to provide as-built or any portion thereof, it shall not be deemed a confl ict of interest or breach of the ‘third party testing company’ require ment. Provide record drawings as follows:

1. Red-lined, hand-marked drawings shall be provided, with one paper copy and a scanned PDF version of the hand-marked d rawings provided on CD or DVD.

D. The as-built drawings shall indicate the location a nd type of all lockout/tagout points for all energy sources for al l equipment and pumps to include breaker location and numbers, valv e tag numbers, etc.

Coordinate lockout/tagout procedures and practices with local VA requirements.

E. Certification documentation shall be provided to CO R 21 working days prior to submitting the request for final inspectio n. The documentation shall include all test results, the names of indivi duals performing work for the testing agency on this project, detail ed procedures followed for all tests, and provide documentation/c ertification that all results of tests were within limits specified. Test results shall contain written sequence of test procedure with wri tten test results annotated at each step along with the expected outc ome or setpoint. The results shall include all readings, including but n ot limited to data on device (make, model and performance characterist ics), normal pressures, switch ranges, trip points, amp readings , and calibration data to include equipment serial numbers or individ ual identifications, etc.

PART 2 - PRODUCTS

2.1 FUEL PIPING

A. Fuel oil. Comply with ASME B3l.l.

B. Piping: Carbon steel, ASTM A53/A53M Grade B or ASTM A106/A106M Grade B, seamless or ERW, Schedule 40. Fuel oil piping shall be seamless downstream of burner automatic shutoff valves.

C. Joints:

1. Pipe sizes 65 mm (2-l/2 inches) and above: Butt-wel ded, no other types allowed.

2. Pipe sizes 50 mm (2 inches) and below: Socket-welde d.

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D. Fittings:

1. Butt-welded joints: Steel, ASTM A234/A234M, Grade B , ASME B16.9, same schedule as adjoining pipe.

2. Socket-welded joints: Forged steel, ASME B16.ll, 13 ,790 kPa (2000 psig class.

E. Unions on piping 50 mm (2 inches) and under: Forged steel, 13,790 kPa

(2000 psig) class or 20,685 kPa (3000 psig) class.

F. Flanges: Forged steel weld neck, ASME B16.5, ASTM A 105/A105M, 1034 kPa

(150 psig).

G. Companion flanges: Flanges and bolting shall confor m to ASME B16.5.

2.2 VENT LINES FROM TANKS AND SAFETY AND RELIEF VALVES

A. Pipe: Carbon steel, ASTM A53/A53M Grade B or A106/A 106M Grade B, seamless or ERW, Schedule 40.

B. Joints:

1. Pipe sizes 65 mm (2-l/2 inches) and above: Butt-wel ded, no other types are allowed.

2. Pipe sizes 50 mm (2 inches) and below: Threaded or butt-welded.

C. Fittings:

1. Welded Joints: Steel, ASTM A234/A234M, Grade B, ASM E B16.9, same schedule as adjoining pipe.

2. Threaded Joints: Steel, ASTM A234/A234M, Grade B, A SME B16.9, Schedule 80.

D. Unions: Forged steel, 13,790 kPa (2000 psig) class or 20,685 kPa (3000 psig) class.

E. Flanges: Forged steel weld neck, ASME B16.5, ASTM A 105/A105M, 1034 kPa

(150 psig).

2.3 MISCELLANEOUS PIPING

A. Instrument and Control Piping (Sensing Point to Tra nsmitter, Controller, or Other Instrument): Construction shal l be same as specified for main service.

B. Drain Piping (All Drain Piping Discharging to Floor Drain-From Drain

Valve to Floor Drain):

1. Pipe: Carbon steel, ASTM A53/A53M Grade B or ASTM A 106/A106M Grade

B, seamless or ERW, Schedule 40.

2. Fittings and Unions: Forged steel, ASME B16.ll, 13, 790 kPa (2000 psig class); or malleable iron, 1034 kPa (150 psig) , threaded.

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2.4 DIELECTRIC FITTINGS

A. Provide threaded dielectric unions for pipe sizes 5 0 mm (2 inches) and under. For 65 mm (2-1/2 inches) and above, provide steel flanges electrically isolated at gasket and by sleeves at b olts. Fittings on cold water and soft water lines shall be rated for 690 kPa (100 psig), 27 degrees C (80 degrees F). Fittings shall be rate d for the maximum pressure and temperature conditions of the service.

2.5 VALVES; GATE, GLOBE, PLUG, CHECK, BALL, VENT COCKS

A. Valves for particular services are generally specif ied as Type Numbers.

The Type Numbers are defined below. All valves of t he same type shall be the products of a single manufacturer. Comply wi th MSS SP-45, MSS

SP-80, and ASME B3l.l. Design valves for the servic e fluids and conditions. Pressure-temperature ratings listed are minimum requirements. Packing and gaskets shall not contain asbestos.

B. Valve Type Designations:

1. Gate Valves:

a. Type 101: Cast steel body ASTM A216/A216M WCB, rate d for 1034 kPa at 260 degrees C (150 psig at 500 degrees F), ll.5 to l3 percent chromium stainless steel flexible wedge and hard fa ced (stellite) or nickel copper alloy seats, 1034 kPa (150 psig) A SME flanged ends, OS&Y, rising stem, bolted bonnet.

b. Type 102: Cast steel body ASTM A2l6/A216M WCB, Clas s 300, ll.5 to l3 percent chromium stainless steel flexible wedge and hard faced

(stellite) alloy seats, ASME flanged ends, OS&Y, ri sing stem, and bolted bonnet.

c. Type 103: Cast steel body ASTM A2l6/A216M WCB, Clas s 300, ll.5 to l3 percent chromium stainless steel flexible wedge and hard faced

(stellite) alloy seats, ASME flanged ends, OS&Y, ri sing stem, and bolted bonnet.

d. Type 105: Forged steel body ASTM A105/A105M, rated for 2070 kPa at 216 degrees C (300 psig at 420 degrees F) minimu m, Class 4138 kPa (600 psig) or Class 5515 kPa (800 psig), harden ed stainless steel or stellite wedge and seats, threaded ends, O S&Y, rising stem, bolted bonnet.

2. Globe Valves:

a. Type 201: Cast steel body ASTM A216/A216M WCB, rate d for 1034 kPa at 260 degrees C (150 psig at 500 degrees F), 11-1/ 2 to 13 percent chromium stainless steel or stellite disc a nd seat, 1034

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b. Type 205: Forged steel body ASTM A105/A105M, rated for 2070 kPa at 216 degrees C (300 psig at 420 degrees F) minimu m, Class 4138 kPa (600 psig) or Class 5515 kPa (800 psig), stainl ess steel disc, stellite seat, threaded ends, OS&Y, rising st em, bolted bonnet.

3. Plug Valves: Cast steel body ASME B16.5 Class 150, one-fourth turn to open. 861 kPa (125 psig) ASME flanged ends for p ipe sizes above

50 mm (2 inches), threaded ends for pipe sizes 50 m m (2 inches) and under. All components designed for service to which applied: natural gas, LP gas (propane), or fuel oil. Furnish lever h andle for each valve.

a. Type 301: Two-way valves up through 100 mm (4 inche s) pipe size.

Eccentric action, non-lubricated plug with resilien t seal molded into groove on plug face providing bubble-tight shu t off. O-ring stem seal, corrosion-resistant bearings, corrosion- resistant seat coating, seal materials as recommended by valve man ufacturer for the service. Valves on natural gas service AGA appr oved.

4. Check Valves:

a. Type 401: Not used.

b. Type 402: Swing-type, cast steel body ASME B16.34, rated for 1724 kPa (250 psig) saturated steam, 3447 kPa (500 psig) WOG, bronze or bronze-faced disc and seat, 1724 kPa (250 psig) ASME flanged ends, bolted cover, renewable disc and seat.

c. Type 403: Swing-type, cast steel body ASME B16.34, rated for 861 kPa (l25 psig) saturated steam, 1380 kPa (200 psig) WOG, bronze or bronze-faced disc and seat, 861 kPa (l25 psig) A SME flanged ends, bolted cover, renewable disc and seat.

d. Type 405: Lift-type, forged steel body ASTM A105/A1 05M, rated for

2070 kPa at 216 degrees C (300 psig at 420 degrees F) minimum

(Class 4138 kPa (600 psig) or 5515 kPa (800 psig)), hardened stainless steel disc, hard faced seat, bolted cover , threaded ends.

e. Type 406: Swing-type, Type 316 stainless steel body , disc and hanger, rated for 1724 kPa at 182 degrees C (250 ps ig at 360 degrees F) minimum.

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f. Type 408: Silent spring-loaded wafer type, cast ste el ASTM

A216/A216M WCB body, rated for 2070 kPa (300 psig) water, 121 degrees C (250 degrees F), stainless steel trim.

5. Ball Valves: Reduced port permitted for bypass (thr ottling) service;

full port required for all other services, one-four th turn to open.

a. Type 501: Type 316 stainless steel body, ball and s tem, rated for

1034 kPa at 185 degrees C (150 psig at 365 degrees F), 4138 kPa at 93 degrees C (600 psig at 200 degrees F); reinfo rced TFE seat, stem seal and thrust washer; end entry, threaded en ds.

b. Type 502: Steel body, rated for 1034 kPa at 185 deg rees C (150 psig at 365 degrees F), 1724 kPa at 121 degrees C ( 250 psig at

250 degrees F), reinforced TFE seat, stem seal and thrust washer;

end entry, threaded ends, UL-listed for natural or LP gas shut off service when used on those services.

c. Type 503: Carbon steel body, steam service, rated f or 1380 kPa at

200 degrees C (200 psig at 392 degrees F), stainles s steel ball and stem, Polyfil seat, live-loaded or adjustable s tem seal, threaded ends.

d. Type 504: Carbon steel body, saturated steam servic e, rated for

1034 kPa (150 psig), stainless steel ball and stem, Polyfil seat, live-loaded stem seal, ASME flanged ends.

6. Valves in Drain Lines from Steam Stop Check Valve, Water Column, Gauge Glass, Low Water Cut-offs:

a. Gate valves, two inches and under: Type 105.

b. Check valves, two inches and under: Type 405.

C. Fuel Oil: Discharge side of pumps. Conform to NFPA 30 and NFPA 3l.

1. Gate valves, 50 mm (2 inches) and under: Type 105.

2. Gate Valves, 65 mm (2-l/2 inches) and above: Type 1 01 or 102.

3. Globe valves, 50 mm (2 inches) and under: Type 205.

4. Plug valves, 100 mm (4 inches) and under: Type 301. (Tank isolating valve on return line.)

5. Check valves, 50 mm (2 inches) and under: Type 405 or 408.

6. Check valves, 65 mm (2-l/2 inches) and above: Type 402 or 408.

7. Ball valves, 50 mm (2 inches) and under: Type 502.

D. Fuel Oil: Suction side of pumps and tank fill lines where tank is below fill point. Conform to NFPA 30 and NFPA 3l.

1. Gate valves, 50 mm (2 inches) and under: Type 105.

2. Gate valves, 65 mm (2-l/2 inches) and above: Type 1 03.

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3. Plug valves, 100 mm (4 inches) and under: Type 301.

4. Check valves, 50 mm (2 inches) and under: Type 405.

5. Check valves, 65 mm (2-l/2 inches) and above: Type 403.

6. Ball valves, 50 mm (2 inches) and under: Type 502.

E. Fuel Oil: Tank fill lines where tank is above fill point.

1. Gate valves, 50 mm (2 inches) and under: Type 105.

2. Gate valves, 65 mm (2-1/2 inches) and above: Type 1 03.

3. Check valves, all sizes: Type 408.

F. Instrumentation and Control Piping: Ball valves, 50 mm (2 inches) and under: Type 502.

2.6 GAUGES, PRESSURE AND COMPOUND

A. ASME B40.100, Accuracy Grade 1A, (pressure, vacuum, or compound), initial mid-scale accuracy 1 percent of scale (Qual ify grade), metal or phenolic case, 115 mm (4-1/2 inches) in diameter, 6 mm (1/4 inch) NPT bottom connection, white dial with black graduation s and pointer, clear glass or acrylic plastic window, suitable for board mounting. Provide red "set hand" to indicate normal working pressure.

B. Provide steel, lever handle union cock. Provide ste el or stainless-steel pressure snubber for gauges in water service.

C. Pressure gauge ranges shall be selected such that t he normal operating pressure for each gauge is displayed near the midpo int of each gauge’s range. Gauges with ranges selected such that the no rmal pressure is displayed at less than 30 percent or more than 70 p ercent of the gauge’s range are prohibited. The units of pressure shall be psig.

2.7 SIGHT FLOW INDICATORS

A. Provide, where shown, to allow observation of flow in piping systems.

B. Type: In line, dual portholes on opposite sides, wi th safety shield, with or without rotor as shown on the drawings. Whe re provided, rotor shall have minimum of three vanes.

C. Construction: Carbon steel body, tempered borosilic ate window, PTFE seals (except Buna-N on oil service), threaded ends on pipe sizes under

65 mm (2-1/2 inches), flanged ends on sizes 65 mm ( 2-1/2 inches) and above. Pressure and temperature ratings shall be eq uivalent to requirements for valves on the same pipelines.

D. Safety Shield: Transparent wrap-around overlap cove ring entire sight flow indicator, designed to protect personnel from failure of indicator. Shield shall fit the indicator tightly a nd be suitable for

1034 kPa, 150 degrees C (150 psig, 302 degrees F).

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2.8 QUICK-COUPLE HOSE CONNECTORS

A. Provide on all Y-strainer drains and where shown to allow quick connection of length of hose to piping drain or blo woff so that discharge fluid can be conveyed to a drainage syste m.

B. Type: Straight through, plug and socket, screw type or cam locking connections, all units 20 mm (3/4 inch) pipe size. Integral shut-off devices not required.

C. Service: Design for water and steam at 103 kPa (15 psig), 154 degrees C

(309 degrees F).

D. Spare Parts: Furnish one socket and one plug.

2.9 FLEXIBLE CONNECTORS

A. Provide flexible connectors as shown to allow diffe rential movements of pumps and piping systems subject to thermal expansi on and to serve as vibration isolators.

2.10 PIPING SUPPORT SYSTEMS

A. Provide an engineered piping support system with al l hangers, supports and anchors designed and located by experienced tec hnical pipe support specialists, utilizing piping system design and ana lysis software. The system design shall be completely documented and su bmitted for review.

B. All pipe hangers and supports, and selection and in stallation shall comply with MSS SP-58 and MSS SP-127.

C. All pipe hanger and support devices shall be in com pliance with specified MSS SP-58 type numbers, have published lo ad ratings, and be products of engineered pipe support manufacturers.

D. All pipe stresses and forces and moments on connect ing equipment and structures shall be within the allowances of the AS ME B31.1, applicable building codes, and equipment manufacturer’s design limits.

E. Piping that expands and contracts horizontally shal l be supported by roller or sliding type hangers and supports except when long vertical hanger rods permit sufficient horizontal movement w ith the vertical angles of the rods less than 4 degrees.

F. Piping that expands and contracts vertically includ ing generator exhaust shall be supported by engineered variable s pring and spring cushion hangers. Utilize MSS SP-58 selection requir ements and guidelines. Vibration isolator hanger types are pro hibited.

G. Seismic braces and shock absorbers shall be provide d. Comply with MSS

SP-127 design requirements and guidelines. Piping s hall remain fully connected and supported under the design seismic ev ents. Piping and

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H. Piping system anchors shall be engineered and locat ed to control movement of piping that is subject to thermal expan sion.

I. Prior to construction, submit complete engineering calculation methods and results, descriptions of all devices with MSS n umbers, sizes, load capabilities and locations. Submit calculations on all moments and forces at anchors and guides, all hanger loads, all pipe stresses that are within 20 percent of the code allowable or exce ed ASME B31.1 code allowable, all pipe movements at supports.

J. Hangers and Supports - Products:

1. Factory-built products of a manufacturer specializi ng in engineered pipe supports. All components shall have published load ratings. All spring type supports shall have published spring ra tes and movement limits. All support assemblies shall include thread ed connections that permit vertical position adjustment. Supports shall comply with

MSS SP-58 Type Numbers as listed below.

2. Upper Attachments to Building Structure: Types 18, 20, 21, 22, 23, 29, and 30.

3. Roller Supports: Types 41, 43, and 46. Provide vert ical adjustment for Type 41 with threaded studs and nuts adjacent t o the roller.

4. Variable Spring Hanger Assembly:

a. Type 51 variable spring, with Type 3 pipe clamp or Type 1 clevis.

Type 53 variable spring trapeze may also be used. L ocate Type 51 variable spring within 300 mm (1 foot) above pipe a ttachment.

Attach rod to top of variable spring with Type 14 c levis.

b. Typical features of variable spring hangers include spring rates under 150 lb/in, enclosed spring, load and travel i ndicator, sizes available with load capabilities ranging from 50 lb to multiples of 10,000 lb.

5. Spring Cushion Hanger Assembly: Double Rod: Type 41 and 49.

6. Light Duty Spring Hanger Assembly: Type 48 light du ty spring, with

Type 3 pipe clamp or Type 1 clevis. Locate Type 48 light duty spring within 300 mm (1 foot) above pipe attachment.

7. Clevis Hangers: Type 1.

8. Wall Brackets: Type 31, 32, and 33.

9. Pipe Stands: Type 38.

10. Riser Clamps: Type 42.

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11. Roller Guides: Type 44. Construct guides to restrai n movement perpendicular to the long axis of the piping. All m embers shall be welded steel.

12. Trapeze Supports: May be used where pipes are close together and parallel. Construct with structural steel channels or angles. Bolt roller supports to steel to support piping subject to horizontal thermal expansion. Attach other piping with U-bolts .

13. Pipe Covering Protection Saddles: Type 39. Provide at all support points on insulated pipe except where Type 3 pipe c lamp is provided.

Insulation shields are prohibited. Refer to Section 23 07 11, HVAC

AND BOILER PLANT INSULATION.

14. Sliding Supports: Type 35. Welded steel attachments to pipe and building structure with Teflon or graphite sliding surfaces bonded to the attachments. Provide steel guides, except at expansion bends, to prevent lateral movement of the pipe.

15. Piping Anchors: Provide engineered designs to accom modate the calculated loads.

16. Seismic Restraints:

a. Comply with MSS SP-127.

b. Bracing: Provide as determined by engineering calcu lations.

c. Shock Absorbers: Type 50. Mechanical or hydraulic t ype rated for shock loads. Pipe attachments shall be Type 3.

2.11 PIPE AND VALVE FLANGE GASKETS

A. Non-asbestos, designed for the service conditions.

2.12 THREAD SEALANTS

A. As recommended by the sealant manufacturer for the service. Teflon tape of any type is prohibited on fuel oil systems.

2.13 PIPE SLEEVES

A. Service: For pipes passing through floors, walls, p artitions.

B. Construction: Steel pipe, schedule 10 minimum.

C. Sleeve Diameter: Not less than 25 mm (1 inch) large r than the diameter of the enclosed pipe and thermal insulation, vapor barrier, and protective covering for insulated pipe; sleeves for un-insulated pipe shall be not less than 25 mm (1 inch) larger than t he diameter of the enclosed pipe.

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PART 3 - EXECUTION

3.1 GENERAL

A. If an installation is unsatisfactory to the COR, th e Contractor shall correct the installation at no additional cost or t ime to the

Government.

3.2 ARRANGEMENT OF PIPING

A. The piping arrangement shown is a design based on c urrently available equipment. The plans show typical equipment to scal e and show practical arrangement. Modification will be necessary during construction, at no additional cost or time to the Government, to adapt the equipment layout and piping plans to the precise equipment pu rchased by the

Contractor. Accessibility for operation and mainten ance shall be maintained.

B. All piping shall be installed parallel to walls and column centerlines

(unless shown otherwise). Fully coordinate work of each trade to provide the designed systems without interference b etween systems. All piping shall be accurately cut, true, and beveled f or welding. Threaded piping shall be accurately cut, reamed and threaded with sharp dies.

Copper piping work shall be performed in accordance with best practices requiring accurately cut clean joints and soldering in accordance with the recommended practices for the material and sold er employed.

Compression type fittings are prohibited.

C. All piping shall be pitched for drainage at a const ant slope of 25 mm in 12 m (1 inch in 40 feet). Exhaust and drain pipi ng shall pitch down in direction of flow. Service water, pumped condens ate, pumped boiler feedwater, oil, shall pitch up in direction of flow . Provide valved air vents at top of rise and valved drains at low point s.

D. Valves shall be located and stems oriented to permi t proper and easy operation and access to valve bonnet for maintenanc e of packing, seat and disc. Valve stems shall not be below centerline of pipe. Refer to plans for stem orientation. Where valves are more t han 2.1 m (7 feet) above the floor or platform, stems shall be horizon tal unless shown otherwise.

E. Provide union adjacent to all threaded end valves.

F. Provide valves as necessary to permit maintenance o f a device or sub-system without discontinuing service to other eleme nts of that service or system.

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3.3 WELDING

A. The contractor is entirely responsible for the qual ity of the welding and shall:

1. Conduct tests of the welding procedures used on the project, verify the suitability of the procedures used, verify that the welds made will meet the required tests, and also verify that the welding operators have the ability to make sound welds unde r standard conditions.

2. Perform all welding operations required for constru ction and installation of the piping systems.

B. Qualification of Welders: Rules of procedure for qu alification of all welders and general requirements for fusion welding shall conform with the applicable portions of ASME B31.1, AWS B2.1/B2. 1M, AWS Z49.1, and also as outlined below.

C. Examining Welder: Examine each welder at job site, in the presence of the COR, to determine the ability of the welder to meet the qualifications required. Test welders for piping fo r all positions, including welds with the axis horizontal (not rolle d) and with the axis vertical. Each welder shall be allowed to weld only in the position in which he has qualified and shall be required to ide ntify his welds with his specific code marking signifying his name and n umber assigned.

D. Examination Results: Provide the COR with a list of names and corresponding code markings. Retest welders who fai l to meet the prescribed welding qualifications. Disqualify welde rs, who fail the second test, for work on the project.

E. Beveling: Field bevels and shop bevels shall be don e by mechanical means or by flame cutting. Where beveling is done b y flame cutting, surfaces shall be thoroughly cleaned of scale and o xidation just prior to welding. Conform to specified standards.

F. Alignment: Provide approved welding method for join ts on all pipes greater than 50 mm (2 inches) to assure proper alig nment, complete weld penetration, and prevention of weld spatter reachin g the interior of the pipe.

G. Erection: Piping shall not be split, bent, flattene d, or otherwise damaged before, during, or after installation. If t he pipe temperature falls to 0 degrees C (32 degrees F) or lower, the p ipe shall be heated to approximately 38 degrees C (100 degrees F) for a distance of 300 mm

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(1 foot) on each side of the weld before welding, a nd the weld shall be finished before the pipe cools to 0 degrees C (32 d egrees F).

H. Non-Destructive Examination of Piping Welds:

1. Perform radiographic examination of 50 percent of t he first 10 welds made and 10 percent of all additional welds made. T he COR reserves the right to identify individual welds for which th e radiographic examination must be performed. All welds will be vi sually inspected by the COR. The VA reserves the right to require te sting on additional welds up to 100 percent if more than 25 percent of the examined welds fail the inspection.

2. An approved independent testing firm regularly enga ged in radiographic testing shall perform the radiographic examination of pipe joint welds. All radiographs shall be reviewed and interpreted by an ASNT Certified Level III radiographer, employ ed by the testing firm, who shall sign the reading report.

3. Comply with ASME B31.1. Furnish a set of films show ing each weld inspected, a reading report evaluating the quality of each weld, and a location plan showing the physical location where each weld is to be found in the completed project. The COR and the commissioning agent shall be given a copy of all reports to be ma intained as part of the project records and shall review all inspect ion records.

I. Defective Welds: Replace and reinspect defective we lds. Repairing defective welds by adding weld material over the de fect or by peening are prohibited. Welders responsible for defective w elds shall be requalified prior to resuming work on the project.

J. Electrodes: Electrodes shall be stored in a dry hea ted area, and be kept free of moisture and dampness during the fabri cation operations.

Discard electrodes that have lost part of their coa ting.

3.4 PIPING JOINTS

A. All butt-welded piping shall be welded at circumfer ential joints, flanges shall be weld neck type; slip-on flanges, s crewed flanges may be applied only with written approval of the COR.

B. Companion flanges at equipment or valves shall matc h flange construction of equipment or valve. Raised face sha ll be removed at all companion flanges when attached to flanges equipped for flat face construction.

C. Gaskets and bolting shall be applied in accordance with the recommendations of the gasket manufacturer and bolt ing standards of

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ASME B31.1. Strains shall be evenly applied without overstress of bolts. Gaskets shall cover entire area of mating fa ces of flanges.

D. Screw threads shall be made up with Teflon tape exc ept gas and oil piping joints shall utilize specified joint compoun d.

3.5 BRANCH INTERSECTION CONNECTIONS

A. Factory-built reinforced tees and laterals are requ ired.

3.6 EXPANSION AND FLEXIBILITY

A. The design includes provision for piping expansion due to pressure, thermal, weight and seismic effects. It is the Cont ractor's responsibility to avoid reduction in flexibility an d increase in stress in piping systems. Major deviation will be shown by submittal for review of scale working drawings and stress calcula tions for the piping systems. Contractor shall provide any necessary add itional construction and materials to limit stresses to safe values as d irected by the COR and at no additional cost or time to the Government .

3.7 PIPE BENDING

A. Pipe bending shall be in accordance with the recomm ended practices of

PFI ES24. Only ASTM A106/A106M seamless pipe may be bent. Sizes below

50 mm (2 inches) may be bent in field; sizes 65 mm (2-1/2 inches) and larger shall have factory-fabricated bends. Minimum radii and tangent lengths for field bent piping are shown in the foll owing table:

Size Minimum Radius Minimum Tangent

15 mm (1/2 inch) 65 mm (2-1/2 inches) 40 mm (1-1/2 inches)

20 mm (3/4 inch) 70 mm (2-3/4 inches) 45 mm (1-3/4 inches)

25 mm (1 inch) 125 mm (5 inches) 50 mm (2 inches)

32 mm (1-1/4 inches) 159 mm (6-1/4 inches) 50 mm (2 inches)

40 mm (1-1/2 inches) 191 mm (7-1/2 inches) 65 mm (2 -1/2 inches)

3.8 SIZE CHANGES

A. Piping size changes shall be accomplished by use of line reducers, reducing ell, reducing tee. Apply eccentric reducti on in all piping requiring continuous drainage. Concentric reduction may be applied in run of piping involving pressure water systems exce pt at pump inlets.

Use concentric increasers where flow is in directio n of increased size.

Eccentric reduction, top flat, at all pump connecti ons.

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3.9 MINOR PIPING

A. Minor piping associated with instrumentation and co ntrol is generally not shown. Interconnection of sensors, transducers, control devices, instrumentation panels, combustion control panel, b urner control panels is the responsibility of the contractor. Small pipi ng associated with water cooling, drips, drains and other minor piping may not be shown to avoid confusion in the plan presentation but shall be provided as part of contract work.

3.10 DIELECTRIC CONNECTION

A. Where copper piping is connected to steel piping pr ovide dielectric connections.

3.11 INSTALLATION – SIGHT FLOW INDICATORS

A. Locate to permit view from floor or platform.

3.12 INSTALLATION - QUICK COUPLE HOSE CONNECTORS

A. Install male plugs on each piping drain.

3.13 INSTALLATION - VIBRATION ISOLATORS IN PIPING

A. Install on pump connections as shown.

3.14 INSTALLATION - PIPE SLEEVES

A. Accurately locate and securely fasten sleeves to fo rms before concrete is poured; install in walls or partitions during th e construction of the walls.

B. Sleeve ends shall be flush with finished faces of w alls and partitions.

C. Pipe sleeves passing through floors shall project 2 5 mm (1 inch) minimum above the finished floor surface and the bo ttom of the sleeve shall be flush with the underside of the floor slab .

3.15 INSTALLATION – PIPE SUPPORT SYSTEMS

A. Coordinate support locations with building structur e prior to erection of piping. Also refer to approved shop drawings of equipment and approved piping layout and hanger layout drawings w hen locating hangers. Arrangement of supports shall facilitate o perating, servicing and removal of valves, strainers, and piping specia lties. Hanger parts shall be marked at the factory with a numbering sys tem keyed to hanger layout drawings. Layout drawings shall be available at the site.

B. Upper attachments to Building Structure:

1. New Reinforced Concrete Construction: Concrete inse rts.

2. Existing Reinforced Concrete Construction: Upper at tachment welded or clamped to steel clip angles (or other construct ion shown on the

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23 21 11 - 22 drawings) which are expansion-bolted to the concret e. Expansion bolting shall be located so that loads place bolts in shear.

3. Steel Deck and Structural Framing: Upper attachment s welded or clamped to structural steel members.

C. Expansion Fasteners and Power Set Fasteners: In exi sting concrete floor, ceiling and wall construction, expansion fas teners may be used for hanger loads up to 1/3 the manufacturer's rated strength of the expansion fastener. Power set fasteners may be used for loads up to 1/4 of rated load. When greater hanger loads are encoun tered, additional fasteners may be used and interconnected with steel members combining to support the hanger.

D. Special Supports:

1. Secure horizontal pipes where necessary to prevent vibration or excess sway.

2. Where hangers cannot be adequately secured as speci fied, (for example, support for flow metering sensing lines, c ontrol piping) special provisions shall be made for hanging and su pporting pipe as directed by the COR.

3. Pipe supports, hangers, clamps or anchors shall not be attached to equipment unless specifically permitted by the spec ifications for that equipment or unless COR gives written permissi on. Attachments to boiler casings are prohibited.

E. Spring Hangers: Locate spring units within one foot of the pipe, breeching or stack attachment except in locations w here spring assemblies interfere with pipe insulation. Adjust s prings to loads calculated by hanger manufacturer.

F. Seismic Braces and Restraints: Provide is accordanc e with Section 13 05

41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS. Do not insulate piping within one foot of device until device has been inspected by COR.

3.16 CLEANING OF PIPING AFTER INSTALLATION

A. Flush all piping sufficiently to remove all dirt an d debris. Fill piping completely. Velocity shall be equivalent to that experienced during normal plant operation at maximum loads. Dur ing flushing, all control valves and pumps shall be disconnected from the system. After cleaning is complete, remove, clean and replace all strainer baskets and elements. Reconnect all equipment. Provide safe points of discharge for debris blown from pipes. Flushing of the system s shall be witnessed

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23 21 11 - 23 by the COR or their representative. Provide documen tation of system flow rates to flushing flow rates and for how long was the flow maintained.

3.17 TESTING

A. Testing of piping components is not required prior to installation.

Valves and fittings shall be capable of withstandin g hydrostatic shell test equal to twice the primary design service pres sure except as modified by specifications on fittings, ASME B16.5. This test capability is a statement of quality of material. T ests of individual items of pipe, fittings or equipment will be requir ed only on instruction of COR and at Government cost, except w here required by the specifications for specific equipment such as the b oilers.

B. After erection, all piping systems shall be capable of withstanding a hydrostatic test pressure of 1.5 times design press ure, as stipulated in ASME B31.1. Hydrostatic tests will be required o n piping when operating tests described are unsatisfactory, or wh en inspection of welds shows poor workmanship and is subject to ques tion by the COR.

When hydrostatic tests show leaks, the COR will req uire necessary welding repairs, in accordance with ASME B31.1, at the Contractor's cost.

C. Perform operating test as follows:

1. Test oil systems under service conditions at pressu re equal to highest setting of safety and relief valves in the individual systems.

2. Make corrections and retests to establish systems t hat have no leaks. Replace or recut any defective fittings or d efective threads.

Soldered material shall be thoroughly cleaned prior to resoldering.

Back welding of threads is prohibited.

D. Prepare and submit test and inspection reports to t he COR within 5 working days of test completion and prior to coveri ng the pipe.

E. All tests shall be witnessed by the COR, their repr esentative, or the commissioning agent and be documented by each secti on tested, date tested, and list or personnel present.

F. Generally, insulation work shall not be performed p rior to testing of piping. Contractor may, at own option and hazard, i nsulate piping prior to test, but any damaged insulation shall be replac ed with new quality as specified for original installation at Contracto r's cost and time.

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3.18 STARTUP AND TESTING

A. Perform tests as recommended by product manufacture r and listed standards and under actual or simulated operating c onditions and prove full compliance with design and specified requireme nts. Tests of the various items of equipment shall be performed simul taneously with the system of which each item is an integral part.

B. When any defects are detected, correct defects and repeat test at no additional cost or time to the Government.

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