232213 Steam and Condensate Heating Piping seismic.pdf

UPGRADE EMERGENCY POWER IN BUILDING 138

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

02-01-20

23 22 13 - 1

SECTION 23 22 13

STEAM AND CONDENSATE HEATING PIPING

PART 1 - GENERAL

1.1 DESCRIPTION

A. Steam, condensate and vent piping inside buildings.

B. A complete listing of common acronyms and abbreviat ions are included in

Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

1.2 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS.

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

C. Section 09 91 00, PAINTING.

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

COMPONENTS.

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

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

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

H. Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

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 Mechanical Engineers (ASME):

B1.20.1-2013............Pipe Threads, General Purpo se (Inch)

B16.5-2013..............Pipe Flanges and Flanged Fi ttings: NPS 1/2 through NPS 24 Metric/Inch Standard

B16.9-2012..............Factory Made Wrought Buttwe lding Fittings

B16.11-2011.............Forged Fittings, Socket-Wel ding and Threaded

B16.42-2016.............Ductile Iron Pipe Flanges a nd Flanged Fittings:

Classes 150 and 300

B31.1-2018..............Power Piping

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

B40.100-2013............Pressure Gauges and Gauge A ttachments

ASME Boiler and Pressure Vessel Code (BPVC) -

BPVC Section II-2019 Materials

BPVC Section VIII-2019 Rules for Construction of Pr essure Vessels, Division 1

02-01-20

23 22 13 - 2

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

C. American Society for Testing and Materials (ASTM):

A53/A53M-2017...........Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and

Seamless

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

Steel Pipe for High-Temperature Service

A216/A216M-2019.........Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-

Temperature Service

A285/A285M-2017.........Standard Specification for Pressure Vessel

Plates, Carbon Steel, Low-and Intermediate-

Tensile Strength

A307-2019...............Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60,000 PSI Tensile

Strength

A516/A516M-2017.........Standard Specification for Pressure Vessel

Plates, Carbon Steel, for Moderate- and Lower-

Temperature Service

A536-1984(R2017)........Standard Specification for Ductile Iron

Castings

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

D. American Welding Society (AWS):

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

Performance Qualifications

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

Processes

E. Manufacturers Standardization Society (MSS) of the Valve and Fitting

Industry, Inc.:

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

F. Military Specifications (Mil. Spec.):

MIL-S-901D-2017.........Shock Tests, H.I. (High Imp act) Shipboard

Machinery, Equipment, and Systems

G. National Board of Boiler and Pressure Vessel Inspec tors (NB):

Relieving Capacities of Safety Valves and Relief Va lves

H. Tubular Exchanger Manufacturers Association (TEMA):

TEMA Standards-2015.....9th Edition

02-01-20

23 22 13 - 3

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.

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

“SUBMITTED UNDER SECTION 23 22 13, STEAM AND CONDEN SATE HEATING

PIPING”, 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. Pipe and equipment supports.

2. Pipe and tubing, with specification, class or type, and schedule.

3. Pipe fittings, including miscellaneous adapters and special fittings.

4. Flanges, gaskets and bolting.

5. Valves of all types.

6. Strainers.

7. Pipe alignment guides.

8. Expansion joints.

9. Expansion compensators.

10. Flexible ball joints: Catalog sheets, performance c harts, schematic drawings, specifications and installation instructi ons.

11. All specified steam system components.

12. Gauges.

13. Thermometers and test wells.

14. Seismic bracing details for piping.

D. Coordination Drawings: Refer to paragraph, SUBMITTA LS of Section 23 05

11, COMMON WORK RESULTS FOR HVAC.

E. As-Built Piping Diagrams: Provide drawing as follow s for steam and steam condensate piping and other central plant equ ipment.

1. One set of reproducible drawings.

F. 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.

02-01-20

23 22 13 - 4

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

1.5 QUALITY ASSURANCE

A. Section 23 05 11, COMMON WORK RESULTS FOR HVAC, whi ch includes welding qualifications.

B. 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.

C. 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 B31.9.

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.

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

American Welding Society.

D. ASME Compliance: Comply with ASME B31.9 for materia ls, products, and installation. Safety valves and pressure vessels sh all bear appropriate

ASME labels.

1.6 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

02-01-20

23 22 13 - 5 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.

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 PIPE AND EQUIPMENT SUPPORTS, PIPE SLEEVES, AND WALL AND CEILING PLATES

A. Provide in accordance with Section 23 05 11, COMMON WORK RESULTS FOR

HVAC.

02-01-20

23 22 13 - 6

2.2 PIPE AND TUBING

A. Steam Piping: Steel, ASTM A53/A53M, Grade B, seamle ss or ERW; ASTM

A106/A106M Grade B, seamless; Schedule 40.

B. Steam Condensate and Pumped Condensate Piping: Stee l, ASTM A53/A53M, Grade B, seamless or ERW; or ASTM A106/A106M Grade B, seamless, Schedule 80.

C. Vent Piping: Steel, ASTM A53/A53M, Grade B, seamles s or ERW; ASTM

A106/A106M Grade B, seamless; Schedule 40, galvaniz ed.

2.3 FITTINGS FOR STEEL PIPE

A. 50 mm (2 inches) and Smaller: Screwed or welded.

1. Cast iron fittings or piping is not acceptable for steam and steam condensate piping. Bushing reduction or use of clos e nipples is not acceptable.

2. Forged steel, socket welding or threaded: ASME B16. 11, 13,790 kPa

(2000 psig) class with ASME B1.20.1 threads. Use Sc hedule 80 pipe and fittings for threaded joints. Lubricant or seal ant shall be oil and graphite or other compound approved for the int ended service.

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

(3000 psig) class on piping 50 mm (2 inches) and un der.

4. Steam line drip station and strainer quick-couple b lowdown hose connection: Straight through, plug and socket, scre w or cam locking type for 15 mm (1/2 inch) ID hose. No integral shut -off is required.

B. 65 mm (2-1/2 inches) and Larger: Welded or flanged joints.

1. Cast iron fittings or piping is not acceptable for steam and steam condensate piping.

2. Butt welding fittings: ASME B16.9 with same wall th ickness as connecting piping. Elbows shall be long radius type , unless otherwise noted.

3. Welding flanges and bolting: ASME B16.5:

a. Steam service: Weld neck or slip-on, raised face, w ith non-asbestos gasket. Non-asbestos gasket shall either b e stainless steel spiral wound strip with flexible graphite fil ler or compressed inorganic fiber with nitrile binder rate d for saturated and superheated steam service 400 degrees C (750 degrees F) and 10,342 kPa (1500 psig).

b. Flange bolting: Carbon steel machine bolts or studs and nuts, ASTM A307, Grade B.

02-01-20

23 22 13 - 7

C. Welded Branch and Tap Connections: Forged steel wel dolets, or branchlets and threadolets may be used for branch c onnections up to one pipe size smaller than the main. Forged steel half- couplings, ASME

B16.11 may be used for drain, vent and gauge connec tions.

2.4 DIELECTRIC FITTINGS

A. Provide where dissimilar metal pipe are joined.

B. 50 mm (2 inches) and Smaller: Threaded dielectric u nion.

C. 65 mm (2-1/2 inches) and Larger: Flange union with dielectric gasket and bolt sleeves, ASME B16.42.

D. Temperature Rating, 121 degrees C (250 degrees F) f or steam condensate and as required for steam service.

E. Contractor’s option: On pipe sizes 50 mm (2 inches) and smaller, screwed end steel gate valves or dielectric nipples may be used in lieu of dielectric unions.

2.5 VALVES

A. Asbestos packing is not acceptable.

B. All valves of the same type shall be products of a single manufacturer.

C. Provide chain operators for valves 150 mm (6 inches ) and larger when the centerline is located 2.1 m (7 feet) or more ab ove the floor or operating platform.

D. Shut-Off Valves:

1. Gate Valves:

a. 50 mm (2 inches) and smaller: Forged steel body, ra ted for 1380 kPa (200 psig) saturated steam, 2758 kPa (400 psig) WOG, bronze wedges and Monel or stainless-steel seats, threaded ends, rising stem, and union bonnet.

b. 65 mm (2-1/2 inches) and larger: Flanged, outside s crew and yoke.

1) High pressure steam 110 kPa (16 psig) and above sys tem): Cast steel body, ASTM A216/A216M grade WCB, 1035 kPa (15 0 psig) at

260 degrees C (500 degrees F), 11-1/2 to 13 percent chrome stainless steel solid disc and seats. Provide 25 mm (1 inch) factory installed bypass with globe valve on valves 100 mm (4 inches) and larger.

2) All other services: Forged steel body, Class B, rat ed for 850 kPa (123 psig) saturated steam, 1380 kPa (200 psig) WOG, bronze or bronze face wedge and seats, 850 kPa (123 psig) ASME flanged ends, OS&Y, rising stem, bolted bonnet, and renewable seat rings.

02-01-20

23 22 13 - 8

E. Globe Valves:

1. Globe Valves:

a. 50 mm (2 inches) and smaller: Forged steel body, ra ted for 1380 kPa (200 psig) saturated steam, 2758 kPa (400 psig) WOG, hardened stainless steel disc and seat, threaded ends, risin g stem, union bonnet, and renewable seat rings.

b. 65 mm (2-1/2 inches) and larger:

1) Globe valves for high pressure steam 110 kPa (16 ps ig): Cast steel body, ASTM A216/A216M grade WCB, flanged, OS& Y, 1035 kPa

(150 psig) at 260 degrees C (500 degrees F), 11-1/2 to 13 percent chrome stainless steel disc and renewable s eat rings.

2) All other services: Steel body, rated for 850 kPa ( 123 psig) saturated steam, 1380 kPa (200 psig) WOG, bronze or bronze-faced disc (Teflon or composition facing permitted) and seat, 850 kPa (123 psig) ASME flanged ends, OS&Y, rising stem, bolted bonnet, and renewable seat rings.

F. Swing Check Valves:

1. 50 mm (2 inches) and smaller: Cast steel, 1035 kPa (150 psig), 45-degree swing disc.

2. 65 mm (2-1/2 inches) and Larger:

a. Check valves for high pressure steam 110 kPa (16 ps ig) and above system: Cast steel body, ASTM A216/A216M grade WCB, flanged, OS&Y, 1035 kPa (150 psig) at 260 degrees C (500 deg rees F), 11-

1/2 to 13 percent chrome stainless steel disc and r enewable seat rings.

b. All other services: 861 kPa (125 psig), flanged, ca st steel body, and bronze trim.

G. Manual Radiator/Convector Valves: Brass, packless, with position indicator.

2.6 STRAINERS

A. Basket or Y Type. Tee type is acceptable for gravit y flow and pumped steam condensate service.

B. High Pressure Steam: Rated 1035 kPa (150 psig) satu rated steam.

1. 50 mm (2 inches) and smaller: Cast steel, rated for saturated steam at 1034 kPa (150 psig) threaded ends.

2. 65 mm (2-1/2 inches) and larger: Cast steel rated f or 1034 kPa (150 psig) saturated steam with 1034 kPa (150 psig) ASME flanged ends or forged steel with 1724 kPa (250 psig) ASME flanged ends.

02-01-20

23 22 13 - 9

C. All Other Services: Rated 861 kPa (125 psig) satura ted steam.

1. 50 mm (2 inches) and smaller: Cast steel body.

2. 65 mm (2-1/2 inches) and larger: Flanged, cast stee l body.

D. Screens: Bronze, Monel metal or 18-8 stainless stee l, free area not less than 2-1/2 times pipe area, with perforations as follows:

1. 75 mm (3 inches) and smaller: 20 mesh for steam and 1.1 mm (0.045 inch) diameter perforations for liquids.

2. 100 mm (4 inches) and larger: 1.1 mm (0.045) inch d iameter perforations for steam and 3.2 mm (1/8 inch) diamet er perforations for liquids.

2.7 PIPE ALIGNMENT

A. Guides: Provide factory-built guides along the pipe line to permit axial movement only and to restrain lateral and ang ular movement.

Guides must be designed to withstand a minimum of 1 5 percent of the axial force which will be imposed on the expansion joints and anchors.

Field-built guides may be used if detailed on the c ontract drawings.

2.8 EXPANSION JOINTS

A. Factory built devices, inserted in the pipe lines, designed to absorb axial cyclical pipe movement which results from the rmal expansion and contraction. This includes factory-built or field-f abricated guides located along the pipe lines to restrain lateral pi pe motion and direct the axial pipe movement into the expansion joints.

B. Minimum Service Requirements:

1. Pressure Containment:

a. Steam Service 35-200 kPa (5-29 psig): Rated 345 kPa (50 psig) at

148 degrees C (298 degrees F).

b. Steam Service 214-850 kPa (31-123 psig): Rated 1035 kPa (150 psig) at 186 degrees C (366 degrees F).

c. Steam Service 869-1035 kPa (126-150 psig): Rated 13 80 kPa (200 psig) at 194 degrees C (381 degrees F).

d. Condensate Service: Rated 690 kPa (100 psig) at 154 degrees C

(309 degrees F).

2. Number of Full Reverse Cycles without failure: Mini mum 1000.

3. Movement: As shown on drawings plus recommended saf ety factor of manufacturer.

C. Manufacturing Quality Assurance: Conform to Expansi on Joints

Manufacturers Association Standards.

02-01-20

23 22 13 - 10

D. Bellows - Internally Pressurized Type:

1. Multiple corrugations of Type 304 or Type A240-321 stainless steel.

2. Internal stainless-steel sleeve entire length of be llows.

3. External cast iron equalizing rings for services ex ceeding 345 kPa

(50 psig).

4. Welded ends.

5. Design shall conform to standards of EJMA and ASME B31.1.

6. External tie rods designed to withstand pressure th rust force upon anchor failure if one or both anchors for the joint are at change in direction of pipeline.

7. Integral external cover.

E. Bellows - Externally Pressurized Type:

1. Multiple corrugations of Type 304 stainless steel.

2. Internal and external guide integral with joint.

3. Design for external pressurization of bellows to el iminate squirm.

4. Welded ends.

5. Conform to the standards of EJMA and ASME B31.1.

6. Threaded connection at bottom, 25 mm (1 inch) minim um, for drain or drip point.

7. Integral external cover and internal sleeve.

F. Expansion Joint Identification: Provide stamped bra ss or stainless-steel nameplate on each expansion joint listing the manufacturer, the allowable movement, flow direction, design pressure and temperature, date of manufacture, and identifying the expansion joint by the identification number on the contract drawings.

2.9 STEAM SYSTEM COMPONENTS

A. Steam Hose and Accessories: Hose shall be sufficien tly flexible to be placed in a 1.2 m (4 feet) diameter coil.

1. Furnish and install in the mechanical room housing each PRV station a 7.6 m (25 feet) length of 15 mm (1/2 inch) ID ste am hose, rated

861 kPa (125 psig) and a hose rack. In one end of t he hose install a quick-couple device, suitable for steam service, to match corresponding devices in the PRV blowdown connectio ns.

2. Hose storage rack: Wall-mounted, steel, iron or alu minum, semi-circular shape, with capacity to store 7.6 m (25 fe et) of 15 mm (1/2 inch) ID steam hose.

2.10 FIRESTOPPING MATERIAL

A. Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

02-01-20

23 22 13 - 11

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.

B. The drawings show the general arrangement of pipe a nd equipment but do not show all required fittings and offsets that may be necessary to connect pipes to equipment, fan-coils, coils, radia tors, etc., and to coordinate with other trades. Provide all necessary fittings, offsets and pipe runs based on field measurements and at no additional cost or time to the Government. Coordinate with other trade s for space available and relative location of HVAC equipment a nd accessories to be connected on ceiling grid. Pipe location on the dra wings shall be altered by contractor where necessary to avoid inte rferences and clearance difficulties.

C. Store materials to avoid excessive exposure to weat her or foreign materials. Keep inside of piping relatively clean d uring installation and protect open ends when work is not in progress.

D. Support piping securely. Refer to PART 3, Section 2 3 05 11, COMMON WORK

RESULTS FOR HVAC. Install convertors and other heat exchangers at height sufficient to provide gravity flow of conden sate to the flash tank and condensate pump.

E. Install piping generally parallel to walls and colu mn center lines, unless shown otherwise on the drawings. Space pipin g, including insulation, to provide 25 mm (1 inch) minimum clear ance between adjacent piping and another surface. Unless shown o therwise, slope steam, condensate and drain piping down in the dire ction of flow not less than 25 mm (1 inch) in 12 m (40 feet). Provide eccentric reducers to keep bottom of sloped piping flat.

F. Locate and orient valves to permit proper operation and access for maintenance of packing, seat and disc. Generally, l ocate valve stems in overhead piping in horizontal position. Provide a u nion adjacent to one end of all threaded end valves. Control valves usua lly require reducers to connect to pipe sizes shown on the drawing.

G. Offset equipment connections to allow valving off f or maintenance and repair with minimal removal of piping. Provide flex ibility in equipment connections and branch line take-offs with 3-elbow swing joints where noted on the drawings.

02-01-20

23 22 13 - 12

H. Tee water piping runouts or branches into the side of mains or other branches. Avoid bull-head tees, which are two retur n lines entering opposite ends of a tee and exiting out the common s ide.

I. Connect piping to equipment as shown on the drawing s. Install components furnished by others such as flow element s (orifice unions), control valve bodies, flow switches, pressure taps with valve, and wells for sensors.

J. Firestopping: Fill openings around uninsulated pipi ng penetrating floors or fire walls, with firestop material. For f irestopping insulated piping refer to Section 23 07 11, HVAC AN D BOILER PLANT

INSULATION.

K. Pipe vents to the exterior. Where a combined vent i s provided, the cross-sectional area of the combined vent shall be equal to sum of individual vent areas. Slope vent piping 25 mm (1 i nch) in 12 m (40 feet) 0.25 percent in direction of flow. Provide a drip pan elbow on relief valve outlets if the vent rises to prevent b ackpressure.

Terminate vent minimum 300 mm (12 inches) above the roof or through the wall minimum 2.4 m (8 feet) above grade with down t urned elbow.

3.2 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

02-01-20

23 22 13 - 13 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

(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

02-01-20

23 22 13 - 14 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.

3.3 PIPE JOINTS

A. Welded: Beveling, spacing and other details shall c onform to ASME B31.1 and AWS B2.1/B2.1M. See Welder’s qualification requ irements under

"Quality Assurance" in Section 23 05 11, COMMON WOR K RESULTS FOR HVAC.

B. Screwed: Threads shall conform to ASME B1.20.1; joi nt compound shall be applied to male threads only and joints made up so no more than three threads show. Coat exposed threads on steel pipe wi th joint compound, or red lead paint for corrosion protection.

C. 125 Pound Cast Steel Flange (Plain Face): Mating fl ange shall have raised face, if any, removed to avoid overstressing the cast steel flange.

3.4 EXPANSION JOINTS (BELLOWS AND SLIP TYPE)

A. Anchors and Guides: Provide type, quantity and spac ing as recommended by manufacturer of expansion joint and as shown. A professional engineer shall verify in writing that anchors and g uides are properly designed for forces and moments which will be impos ed.

B. Cold Set: Provide setting of joint travel at instal lation as recommended by the manufacturer for the ambient tem perature during the installation.

C. Preparation for Service: Remove all apparatus provi ded to restrain joint during shipping or installation. Representati ve of manufacturer shall visit the site and verify that installation i s proper.

D. Access: Expansion joints shall be located in readil y accessible space.

Locate joints to permit access without removing pip ing or other devices. Allow clear space to permit replacement of joints and to permit access to devices for inspection of all surf aces and for adding packing.

02-01-20

23 22 13 - 15

3.5 STEAM TRAP PIPING

A. Install to permit gravity flow to the trap. Provide gravity flow (avoid lifting condensate) from the trap where modulating control valves are used. Support traps weighing over 11 kg (24 pounds) independently of connecting piping.

1. On pipe size 1 ½ inch and above a raised face flang e is required to allow for removal of the steam trap without disturb ing surrounding piping.

2. On pipe size below 1 ½ inch raised face flanges or unions may be used to allow for removal of the traps.

3.6 SEISMIC BRACING

A. Provide is accordance with Section 13 05 41, SEISMI C RESTRAINT

REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS.

3.7 LEAK TESTING

A. Inspect all joints and connections for leaks and wo rkmanship and make corrections as necessary, to the satisfaction of th e COR in accordance with the specified requirements. Testing shall be p erformed in accordance with the specification requirements.

B. An operating test at design pressure, and for hot s ystems, design maximum temperature.

C. A hydrostatic test at 1.5 times design pressure. Fo r water systems, the design maximum pressure would usually be the static head, or expansion tank maximum pressure, plus pump head. Factory test ed equipment

(convertors, exchangers, coils, etc.) need not be f ield tested. Avoid excessive pressure on mechanical seals and safety d evices.

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.

3.8 FLUSHING AND CLEANING PIPING SYSTEMS

A. Steam, Condensate and Vent Piping: The piping syste m shall be flushed clean prior to equipment connection. Cleaning inclu des pulling all strainer screens and cleaning all scale/dirt legs d uring startup operation. Contractor shall be responsible for dama ge caused by inadequately cleaned/flushed systems.

02-01-20

23 22 13 - 16

3.9 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.

C. Adjust red set hand on pressure gauges to normal wo rking pressure.

3.10 DEMONSTRATION AND TRAINING

A. Provide services of manufacturer’s technical repres entative for 4 hours to instruct each VA personnel responsible in operat ion and maintenance of the system.

- - - E N D - - -