Attachment D - 232213-2026-09 Steam and Condensate Heating Piping.docx

09-01-2026

SECTION 23 22 13

STEAM AND CONDENSATE HEATING PIPING

SPEC WRITER NOTES:

3. Provide the year of latest edition to each publication listed in Article 1.3 APPLICABLE PUBLICATIONS.

GENERAL

DESCRIPTION

Steam, condensate, and vent piping inside buildings.

Boiler plant and outside steam distribution piping is covered in specification Section 33 63 00, STEAM ENERGY DISTRIBUTION and Section 23 21 11, BOILER PLANT PIPING SYSTEMS.

A complete listing of common acronyms and abbreviations are included in //Section 23 05 10, COMMON WORK RESULTS FOR BOILER PLANT AND STEAM GENERATION// //Section 23 05 11, COMMON WORK RESULTS FOR HVAC//.

RELATED WORK

Section 01 00 00, GENERAL REQUIREMENTS.

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

Section 01 81 13, SUSTAINABLE CONSTRUCTION REQUIREMENTS.

//Section 01 91 00, GENERAL COMMISSIONING REQUIREMENTS.// Section 09 91 00, PAINTING.

//Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL COMPONENTS.// //Section 23 05 10, COMMON WORK RESULTS FOR BOILER PLANT AND STEAM GENERATION.// //Section 23 05 11, COMMON WORK RESULTS FOR HVAC.// Section 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC.

Section 23 07 11, HVAC AND BOILER PLANT INSULATION.

//Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.// Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC.

Section 23 22 23, STEAM CONDENSATE PUMPS.

Section 23 25 00, HVAC WATER TREATMENT.

APPLICABLE PUBLICATIONS

SPEC WRITER NOTES:

1. Make material requirements agree with requirements specified in the referenced Applicable Publications. Verify and update the publication list to that which applies to the project unless the reference applies to all mechanical systems. Publications that apply to all mechanical systems may not be specifically referenced in the body of the specification but shall form a part of this specification.

2. Insert the year of approved latest edition between the brackets and delete the brackets // // if applicable to this project.

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. Where conflicts occur these specifications and the VHA standards shall govern.

American Society of Mechanical Engineers (ASME):

ASME Boiler and Pressure Vessel Code (BPVC) - BPVC Section II-//2021// Materials BPVC Section VIII-//2021// Rules for Construction of Pressure Vessels, Division 1 BPVC Section IX-//2021//Welding, Brazing, and Fusing Qualifications American Society for Testing and Materials (ASTM):

American Welding Society (AWS):

Manufacturers Standardization Society (MSS) of the Valve and Fitting Industry, Inc.:

SP-80-//2019// Bronze Gate, Globe, Angle, and Check Valves Military Specifications (Mil. Spec.):

MIL-DTL-901E-//2017// Shock Tests, H.I. (High Impact) Shipboard Machinery, Equipment, and Systems National Board of Boiler and Pressure Vessel Inspectors (NB):

Relieving Capacities of Safety Valves and Relief Valves Tubular Exchanger Manufacturers Association (TEMA):

TEMA Standards-2019 10th Edition

SUBMITTALS

Submittals, including number of required copies, shall be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Information and material submitted under this section shall be marked “SUBMITTED UNDER SECTION 23 22 13, STEAM AND CONDENSATE HEATING PIPING”, with applicable paragraph identification.

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

Pipe and equipment supports.//Submit calculations for variable spring and constant support hangers.// Pipe and tubing, with specification, class or type, and schedule.

Pipe fittings, including miscellaneous adapters and special fittings.

Flanges, gaskets and bolting.

Valves of all types.

Steam traps.

Steam trap monitoring system.

Strainers.

Pipe alignment guides.

Expansion joints.

Expansion compensators.

Flexible ball joints: Catalog sheets, performance charts, schematic drawings, specifications and installation instructions.

All specified steam system components.

Gauges.

Thermometers and test wells.

Electric heat tracing systems.

Seismic bracing details for piping.

Manufacturer's certified data report, Form No. U-1, for ASME pressure vessels:

Heat Exchangers (Steam-to-Hot Water).

Flash tanks.

Coordination Drawings: Refer to paragraph, SUBMITTALS of Section 23 05 11, COMMON WORK RESULTS FOR HVAC.

As-Built Piping Diagrams: Provide drawing as follows for steam and steam condensate piping and other central plant equipment.

One wall-mounted stick file for prints. Mount stick file in the chiller plant or adjacent control room along with control diagram stick file.

One set of reproducible drawings.

Complete operating and maintenance manuals including wiring diagrams, technical data sheets, information for ordering replacement parts, and troubleshooting guide:

Include complete list indicating all components of the systems.

Include complete diagrams of the internal wiring for each item of equipment.

Diagrams shall have their terminals identified to facilitate installation, operation and maintenance.

//Completed System Readiness Checklist provided by the CxA and completed by the contractor, signed by a qualified technician and dated on the date of completion, in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.// //Submit training plans and instructor qualifications in accordance with the requirements of Section 23 08 00, COMMISSIONING OF HVAC SYSTEMS.//

QUALITY ASSURANCE

Section 23 05 11, COMMON WORK RESULTS FOR HVAC, which includes welding qualifications.

The products and execution of work specified in this section shall conform to the referenced codes and standards as required by the specifications. Local codes and amendments shall be enforced, along with requirements of local utility companies. The most stringent requirements of these specifications, local codes, or utility company requirements shall always apply. Any conflicts shall be brought to the attention of the COR.

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

Qualify welding processes and operators for piping according to ASME BPVC Section IX, AWS Z49.1 and AWS B2.1/B2.1M.

Comply with provisions in //ASME B31.9// //ASME B31.1//.

Certify that each welder and welding operator has passed AWS qualification tests for welding processes involved and that certification is current and recent. Submit documentation to the COR.

All welds shall be stamped according to the provisions of the American Welding Society.

ASME Compliance: Comply with //ASME B31.9// //ASME B31.1// for materials, products, and installation. Safety valves and pressure vessels shall bear appropriate ASME labels.

AS-BUILT DOCUMENTATION

SPEC WRITER NOTE: Coordinate O&M Manual requirements with Section 01 00 00, GENERAL REQUIREMENTS. O&M manuals shall be submitted for content review as part of the close-out documents.

Submit manufacturer’s literature and data updated to include submittal review comments and any equipment substitutions.

Submit operation and maintenance data updated to include submittal review comments, VA approved substitutions and construction revisions shall be //in electronic version on CD or DVD// inserted into a three-ring binder. All aspects of system operation and maintenance procedures, including applicable piping isometrics, wiring diagrams of all circuits, a written description of system design, 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 emergency situations. Notes on all special systems or devices shall be included. A List of recommended spare parts (manufacturer, model number, and quantity) shall be furnished. Information explaining any special knowledge or tools the owner will be required to employ shall be inserted into the As-Built documentation.

SPEC WRITER NOTE: Select and edit one of the bracketed options after the paragraph below to indicate the format in which the contractor must provide record drawing files. Select the hand-marked option only when the designer has been separately contracted to provide the record drawings from the contractor’s mark-ups. Select the BIM option only when a BIM model will be generated, which is typically only performed by the designer on some Design-Bid-Build projects or by the contractor on some Design-Build projects.

The installing contractor shall maintain as-built drawings of each completed phase for verification; and, shall provide 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 conflict of interest or breach of the ‘third party testing company’ requirement. Provide record drawings as follows:

//Red-lined, hand-marked drawings are to be provided, with one paper copy and a scanned PDF version of the hand-marked drawings provided on CD or DVD.// //As-built drawings are to be provided, with a copy of them on AutoCAD version // // provided on CD or DVD. The CAD drawings shall use multiple line layers with a separate individual layer for each system.// //As-built drawings are to be provided, with a copy of them in three-dimensional Building Information Modeling (BIM) software version // // provided on CD or DVD.// The as-built drawings shall indicate the location and type of all lockout/tagout points for all energy sources for all equipment and pumps to include breaker location and numbers, valve tag numbers, etc. Coordinate lockout/tagout procedures and practices with local VA requirements.

Certification documentation shall be provided to COR 21 working days prior to submitting the request for final inspection. The documentation shall include all test results, the names of individuals performing work for the testing agency on this project, detailed procedures followed for all tests, and provide documentation/certification that all results of tests were within limits specified. Test results shall contain written sequence of test procedure with written test results annotated at each step along with the expected outcome or setpoint. The results shall include all readings, including but not limited to data on device (make, model and performance characteristics), normal pressures, switch ranges, trip points, amp readings, and calibration data to include equipment serial numbers or individual identifications, etc.

PRODUCTS

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

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

PIPE AND TUBING

Steam Piping: Steel, ASTM A53/A53M, Grade B, seamless or ERW; ASTM A106/A106M Grade B, seamless; STD (Standard) Schedule.

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

Vent Piping: Steel, ASTM A53/A53M, Grade B, seamless or ERW; ASTM A106/A106M Grade B, seamless; STD (Standard) Schedule, galvanized.

FITTINGS FOR STEEL PIPE

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

Cast iron fittings or piping is prohibited for steam and steam condensate piping. Bushing reduction or use of close nipples is prohibited.

Forged steel, socket welding or threaded: ASME B16.11, 13,790 kPa (2000 psig) class with ASME B1.20.1 threads. Use Schedule 80 pipe and fittings for threaded joints. Lubricant or sealant shall be oil and graphite, or other compound approved for the intended service.

Unions: Forged steel, 13,790 kPa (2000 psig) class or 20,685 kPa (3000 psig) class on piping 50 mm (2 inches) and less.

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

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

Cast iron fittings or piping is prohibited for steam and steam condensate piping.

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

Welding flanges and bolting: ASME B16.5:

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

Flange bolting: Bolts shall be high strength steel ASTM A193/A193M, Grade B7. Nuts shall be ASTM A194/A194M.

Welded Branch and Tap Connections: Forged steel weldolets, or branchlets and threadolets may be used for branch connections up to one pipe size smaller than the main. Forged steel half-couplings, ASME B16.11 may be used for drain, vent and gauge connections.

DIELECTRIC FITTINGS

Provide where dissimilar metal pipe are joined.

50 mm (2 inches) and Smaller: Threaded dielectric union.

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

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

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.

VALVES

Asbestos packing is prohibited.

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

Provide chain operators for valves 150 mm (6 inches) and larger when the centerline is located 2.1 meter (7 feet) or greater above the floor or operating platform.

Shut-Off Valves:

Ball Valves:

50 mm (2 inches) and smaller: Forged steel body, rated 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.

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

High pressure steam 110 kPa (16 psig) and above system: Cast steel body, ASTM A216/A216M grade WCB, 1035 kPa (150 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.

All other services: Forged steel body, Class B, rated 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.

Ball Valves: Reduced port permitted for bypass (throttling) service; full port required for all other services, one-fourth turn to open.

Type 501: Type 316 stainless steel body, ball and stem, rated for 1034 kPa at 185 degrees C (150 psig at 365 degrees F), 4137 kPa at 93 degrees C (600 psig at 200 degrees F); reinforced TFE seat, stem seal and thrust washer; end entry, threaded ends.

Type 502: Steel body, rated for 1034 kPa at 185 degrees 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.

Type 503: Carbon steel body, steam service, rated for 1380 kPa at 200 degrees C (200 psig at 392 degrees F), stainless steel ball and stem, Polyfil seat, live-loaded or adjustable stem seal, threaded ends.

Globe and Angle Valves:

Globe Valves:

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

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

Globe valves for high pressure steam 110 kPa (16 psig): 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 seat rings.

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.

Angle Valves:

50 mm (2 inches) and smaller: Cast steel 1035 kPa (150 psig), union bonnet with metal plug type disc.

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

Angle valves for high pressure steam 110 kPa (16 psig): 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 seat rings.

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

Swing Check Valves:

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

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

Check valves for high pressure steam 110 kPa (16 psig) and above system: 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 seat rings.

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

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

STRAINERS

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

High Pressure Steam: Rated 1035 kPa (150 psig) saturated steam.

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

65 mm (2-1/2 inches) and larger: Cast steel rated for 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.

All Other Services: Rated 861 kPa (125 psig) saturated steam.

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

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

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

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

100 mm (4 inches) and larger: 1.1 mm (0.045) inch diameter perforations for steam and 3.2 mm (1/8 inch) diameter perforations for liquids.

PIPE ALIGNMENT

Guides: Provide factory-built guides along the pipe line to permit axial movement only and to restrain lateral and angular movement. Guides shall be designed to withstand a minimum of 15 percent of the axial force which will be imposed on the expansion joints and anchors. Field-built guides may be used if detailed in the contract documents.

SPEC WRITER NOTE: Pipe loops are preferred. Provide pipe loops where possible.

EXPANSION JOINTS

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

Minimum Service Requirements:

Pressure Containment:

Steam Service 35-200 kPa (5-29 psig): Rated 345 kPa (50 psig) at 148 degrees C (298 degrees F).

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

Steam Service 869-1035 kPa (126-150 psig): Rated 1380 kPa (200 psig) at 194 degrees C (381 degrees F).

Condensate Service: Rated 690 kPa (100 psig) at 154 degrees C (309 degrees F).

Number of Full Reverse Cycles without failure: Minimum 1000.

Movement: As shown on contract documents plus recommended safety factor of manufacturer.

Manufacturing Quality Assurance: Conform to Expansion Joints Manufacturers Association Standards.

Bellows - Internally Pressurized Type:

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

Internal stainless-steel sleeve entire length of bellows.

External cast iron equalizing rings for services exceeding 345 kPa (50 psig).

Welded ends.

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

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

Integral external cover.

Bellows - Externally Pressurized Type:

Multiple corrugations of Type 304 stainless steel.

Internal and external guide integral with joint.

Design for external pressurization of bellows to eliminate squirm.

Welded ends.

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

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

Integral external cover and internal sleeve.

Expansion Joint Identification: Provide stamped brass 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 in the contract documents.

FLEXIBLE BALL JOINTS

Design and Fabrication: One-piece component construction, fabricated from steel with welded ends, designed for a working steam pressure of 1725 kPa (250 psig) and a temperature of 232 degrees C (450 degrees F). Each joint shall provide for 360 degrees rotation in addition to a minimum angular flexible movement of 30 degrees for sizes 6 mm (1/4 inch) to 150 mm (6 inch) inclusive, and 15 degrees for sizes 65 mm (2-1/2 inches) to 762 mm (30 inches). Joints through 355 mm (14 inches) shall have forged pressure retaining members, while size 406 mm (16 inches) through 762 mm (30 inches) shall be of one-piece construction.

Material:

Cast or forged steel pressure containing parts and bolting in accordance with ASME BPVC Section II or ASME B31.1. Retainer may be ductile iron ASTM A536, Grade 65-45-12, or ASME BPVC Section II SA 515, Grade 70.

Gaskets: Steam pressure molded composition design for a temperature range of from minus 10 degrees C (50 degrees F) to plus 274 degrees C (525 degrees F).

Certificates: Submit qualifications of ball joints in accordance with the following test data:

Low pressure leakage test: 41 kPa (6 psig) saturated steam for 60 days.

Flex cycling: 800 Flex cycles at 3447 kPa (500 psig) saturated steam.

Thermal cycling: 100 saturated steam pressure cycles from atmospheric pressure to operating pressure and back to atmospheric pressure.

Environmental shock tests: Forward certificate from a recognized test laboratory, that ball joints of the type submitted has passed shock testing in accordance with Mil. Spec MIL-S-901.

Vibration: 170 hours on each of three mutually perpendicular axes at 25 to 125 Hz; 1.3 mm to 2.5 mm (0.05 inch to 0.10 inch) double amplitude on a single ball joint and 3 ball joint off set.

STEAM SYSTEM COMPONENTS

Heat Exchanger (Steam to Hot Water): Shell and tube type, U-bend removable tube bundle, steam in shell, water in tubes, equipped with support cradles.

Maximum tube velocity: 2.3 meter/second (7.5 feet/second).

Tube fouling factor: TEMA Standards, but not less than 0.00018 square meters K/W (0.001 square foot/hour degrees F/Btu).

Materials:

Shell: Steel.

Tube sheet and tube supports: Steel or brass.

Tubes: 20 mm (3/4 inch) OD copper.

Head or bonnet: Steel.

Construction: In accordance with ASME Pressure Vessel Code for 861 kPa (125 psig) working pressure for shell and tubes. Provide manufacturer's certified data report, Form No. U-1.

Optional Heat Transfer Package: In lieu of field erected individual components, the Contractor may provide a factory or shop assembled package of heat exchangers, pumps, and other components, pre-piped and pre-wired and supported on a welded steel frame or skid.

Steam Pressure Reducing Valves in PRV Stations:

Type: Single-seated, diaphragm operated, spring-loaded, external or internal steam pilot-controlled, normally closed, adjustable set pressure. Pilot shall sense controlled pressure downstream of main valve.

Service: Provide controlled reduced pressure to steam piping systems.

Pressure control shall be smooth and continuous with maximum drop of //10// // // percent deviation from set pressure. Maximum flow capacity of each valve shall not exceed capacity of downstream safety valve(s).

Main valve and pilot valve shall have replaceable valve plug and seat of stainless steel, Monel, or similar durable material.

Pressure rating for high pressure steam: Not less than 1035 kPa (150 psig) saturated steam.

Connections: Flanged for valves 65 mm (2-1/2 inches) and larger; flanged or threaded ends for smaller valves.

SPEC WRITER NOTE: Evaluate the need to provide acoustical measures for maintaining the specified noise levels in the adjoining spaces. Append here specifications for sound reduction accessories such as acoustic plates or blankets, silencers or noise diffusers as required. Indicate location in the contract documents.

Select pressure reducing valves to develop less than 85 dBA at 1.5-meter (5 feet) elevation above adjacent floor, and 1.5 meter (5 feet) distance in any direction. Inlet and outlet piping for steam pressure reducing valves shall be Schedule 80 minimum for required distance to achieve required levels or sound attenuators shall be applied.

//Direct-Digital Control PRV Valves: May be furnished in lieu of steam operated valves. All specification requirements for steam operated valves apply. In the event of signal failure, //valves shall be normally closed// //failsafe device accessory in the actuator to stroke valve to predetermined position indicated//. Install per manufacturer’s recommendation.// Safety Valves and Accessories: Comply with ASME BPVC Section VIII. Capacities shall be certified by National Board of Boiler and Pressure Vessel Inspectors, maximum accumulation 10 percent. Provide lifting lever. Provide drip pan elbow where shown. Valve shall have stainless steel seats and trim.

Steam PRV for Individual Equipment: Cast steel body, screwed or flanged ends, rated 861 kPa (125 psig), or 20 percent above the working pressure, whichever is greater. Single-seated, diaphragm operated, spring loaded, adjustable range, all parts renewable.

Moisture Separator: Shall be of the high efficiency internal baffle type, with a pressure drop that does not exceed an equivalent length of straight pipe. Body shall be iron, steel or cast steel with screwed, socket weld or flanged connections as detailed on drawing schedule. Steel construction shall be in accordance with Section VIII, Division 1 of the ASME Boiler and Pressure Vessel Code with ASME Class 150, 300 or 600 RF flange connections. A bottom drain connection shall be provided for the installation of a trap to discharge any accumulated liquid. Separators shall be installed before steam PRV and Control Valves.

Flash Tanks: Horizontal or vertical vortex type, constructed of copper bearing steel, ASTM A516/A516M or ASTM A285/A285M, for a steam working pressure of 861 kPa (125 psig) to comply with ASME Code for Unfired Pressure Vessels and stamped with "U" symbol. Perforated pipe inside tank shall be ASTM A53/A53M Grade B, seamless or ERW, or ASTM A106/A106M Grade B seamless, Schedule 80. Corrosion allowance of 1.6 mm (1/16 inch) may be provided in lieu of the copper bearing requirement. Provide data Form No. U-1.

Steam Trap: Each type of trap shall be the product of a single manufacturer. Provide trap sets at all low points and at 61 meter (200 feet) intervals on the horizontal main lines.

Floats and linkages shall provide sufficient force to open trap valve over full operating pressure range available to the system. Unless otherwise indicated in the contract documents, traps shall be sized for capacities indicated at minimum pressure drop as follows:

For equipment with modulating control valve: 1.7 kPa (1/4 psig), based on a condensate leg of 300 mm (12 inches) at the trap inlet and gravity flow to the receiver.

For main line drip trap sets and other trap sets at steam pressure: Up to 70 percent of design differential pressure. Condensate may be lifted to the return line.

Trap bodies: Steel and stainless-steel, constructed to permit ease of removal and servicing working parts without disturbing connecting piping. The use of raised face flange is required on pipe sizes 1-1/2 inch and greater. The use of unions is acceptable for pipe sizes less than 1─1/2 inches. For systems without relief valve traps shall be rated for the pressure upstream of the steam supplying the system.

Balanced pressure thermostatic elements: Phosphor bronze, stainless steel or Monel metal.

Valves and seats: Suitable hardened corrosion resistant alloy.

Mechanism: Brass, stainless steel or corrosion resistant alloy.

Floats: Stainless steel.

Inverted bucket traps: Provide bi-metallic thermostatic element for rapid release of non-condensables.

Thermodynamic steam traps: Shall have tight shut-off with no steam loss allowed either by bleed or “controlled leak” and shall have an integral seat design with hardened disc and seating surfaces. Thermodynamic traps for steam pressures below 600 psi shall be all stainless-steel construction with threaded, socket weld or flanged connections on a common centerline, and shall be capable of operating in any position. Traps shall be capable of operating with up to 80% back pressure and shall be standard with insulating cover to reduce heat loss. Thermodynamic traps for steam pressures 600 psi or higher shall be of alloy steel construction with threaded, socket weld or flanged connections on a common centerline, and will operate in any position. Steam trap shall be capable of operating with up to 80% back pressure with operating pressure up to 900 psi. Thermodynamic trap shall have three equidistant discharge ports between seat land surfaces to minimize disc and seat wear.

Factory-Packaged Trap Station: As an option for drip points requiring isolation valves, strainer, trap, check-valve, valved test ports, and monitoring provide factory packaged trap station including all these features:

Shall consist of compact stainless steel design comprising upstream and downstream isolation valves, a quick- fit universal trap connector, strainer, and check valve. The trap station shall be single-piece construction. Once installed, the station remains permanently in the line. Steam traps shall be installed and removed from the station by two bolts, facilitating simple and rapid installation and replacement.

Isolation valves, check valve, and strainer shall be maintainable.

Steam trap station shall be suitable for use with and shall include thermodynamic, inverted bucket, float & thermostatic, or thermostatic steam traps fitted with universal connectors. The selected steam trap shall be attached to the connector by bolts.

Steam Trap Station shall be designed for maximum operating pressure (PMO) with saturated steam of 1751 kPa (254 psig). For ANSI 150 connections PMO shall be 1379 kPa (200 psig).

All components of the packaged trap station shall meet specified requirements for individual components specified in this section.

SPEC WRITER’S NOTES:

// Wireless Trap Performance Monitoring System: The steam traps in this facility are monitored by // // system, manufactured by // //. Provide additional trap monitors and required receiver, transmitters, and programing compatible with the existing system.

//Wireless Trap performance Monitoring System: All traps shall be provided with electronic monitoring system which at minimum shall detect trap stuck open or trap stuck closed conditions and alarm the platform. The steam trap wireless monitoring system digital shall utilize a web-based platform with the following characteristics:

Wireless Steam Trap Monitoring System dashboard must be viewable on the same platform as other monitored steam equipment for consistency and ease of use. Other steam equipment could include heat exchangers, Air Handling Units (AHUs), flow meters, boiler house controls, and pressure/temperature transmitters.

Wireless Steam Trap Monitoring System shall be BACnet compatible or shall be provided with a BACnet interface so that all the data and alarms can be fully integrated (read / write) into the control system ECC.

Wireless Steam Trap Station shall be able to detect water-hammer incidents to improve steam system safety (optional) Wireless Steam Trap Monitoring System shall communicate via API (application programmable interface).

Wireless Steam Trap Monitoring System shall provide trending data for each steam trap.

Wireless Steam Trap Monitoring System shall include a floorplan layout of all steam trap locations in system.

Wireless Steam Trap Monitoring System shall identify the following information for each steam trap in the system:

Monitoring System Steam Trap ID # Facility Steam Trap Tag # Steam trap type Steam trap manufacturer Steam Pressure Pipe size Steam Equipment being trapped Subset Grouping within and identified by facility Wireless steam trap monitoring system shall utilize a clamp-on style monitor that reads both ultrasonic and temperature inputs at each steam trap. Both ultrasonic and temperature inputs shall be utilized for determination of steam trap condition. The utilization of a single input variable is not acceptable.

Communication of data shall utilize standard industry protocol (BACnet). Proprietary communication protocol is not acceptable.

The communication gateway shall be able to connect via cellular network or facility LAN The battery for the trap testing monitor shall have a service life of 5 years or longer. // SPEC WRITER NOTE: In situations where ordinary traps may not meet the varying range of equipment performance (such as possibility of stall conditions), consider the use of pressure powered pump traps.

Pressure Driven Condensate Pump Trap:

Unit shall automatically trap and pump condensate from process and heating equipment under all operating conditions including vacuum.

Body shall be constructed of cast iron with all stainless-steel internals. The mechanism shall incorporate //Inconel alloy// //stainless steel// springs.

Motive Force: The pump trap shall utilize steam, to remove condensate from the receiving vessel.

Pumps shall require no electricity for operation.

//The pump trap shall include a bronze water level gauge with shut off valves.// Check valves at inlet and outlet shall be //steel// //stainless steel//.

ASME BPVC Section VIII.

//Provide pump trap with removable insulation cove //and digital cycle counter//.// //Manufacturer standard paint finish //coated in electroless nickel plate//.// Thermostatic Air Vent (Steam): Steel body, balanced pressure bellows, stainless steel (renewable) valve and seat, rated 861 kPa (125 psig) working pressure, 20 mm (3/4 inch) screwed connections. Air vents shall be balanced pressure type that responds to steam pressure-temperature curve and vents air at any pressure.

SPEC WRITER NOTES:

Clean Steam Generator for HVAC Humidification: Factory fabricated; UL listed heat exchanger for the generation of low-pressure clean steam to be used in HVAC humidification. Compatible with softened water // DI/RO water //.

//Steam to steam humidifier: Steam to steam humidifier, 304 stainless steel tank with removable 304 stainless steel cover with gasketed flanges, steam outlet connection on top of tank for hose or pipe.

Tank: Stainless steel.

Enclosed cabinet, coated steel construction and air gap between cabinet and insulated tank Steam control valve, steam inlet strainer and steam trap furnished and installed at factory.// Steam outlet on top of tank configured to connect to hose, pipe, or flange connection.

//Tubular copper heat exchanger and header with nickel coating.// //Stainless steel evaporator tank with flat surfaces.// Mounting: Humidifier shall be mounted on painted legs.

Electric immersion heated humidifier: 304 stainless steel tank with removable 304 stainless steel cover with gasketed flanges, heater / cover interlock safety switch, power and control wiring terminal strip, steam outlet at top for hose or pipe connection. Factory insulated.

Immersion heater(s): Heater(s) shall be Incoloy alloy-sheathed resistance type designed for no more than 86 watts per square inch. Two threaded ends of each heater element shall pass through the top of the evaporating chamber and be secured and sealed with washer and threaded nuts to evaporating chamber Temperature sensor: A factory mounted sensor, with a temperature range of ‑40 to 248 F (‑40 to 120 C) shall be mounted on the humidifier to maintain evaporating chamber water temperature above freezing.

Over-temperature switch: A factory-mounted and -wired UL-listed limit control sensor with manual reset shall sense an over-temperature condition and de-energize heater circuit controls.

Indoor Mounting: Humidifier shall be mounted on factory furnished, field installed legs.

Drain Positive drainage/blow-down using a drain pump, drawing water from the bottom of the tank, maximizing mineral evacuation.

Steam trap and strainer: Humidifier shall include a float/thermostatic steam trap and steam supply line strainer.

Water requirements: The humidifier shall be capable of generating steam from softened, or DI/RO water//

Humidifier shall have a stainless-steel float operated fill valve with an electric solenoid to prevent tank from filling when the tank is not in service //Humidifier shall have a field-wired low water float switch to provide water level indication for building management systems.// Factory assembled and tested with the humidifier installed to provide complete weather protection and to operate within the following temperature limits: -40 to 120 degree F (-40 to 50 degrees C).

Frame construction: 5 degree (127 mm), 12-gauge, G-90 galvanized steel formed frame, suitably reinforced and braced to permit loading, shipping, unloading and rigging to the unit destination without damage to external or internal components. The base frame shall be corrosion resistant without painting or further coating.

Housing construction: 16-gauge, G-90 galvanized steel panels fabricated into self-framing, double standing seam-type construction. All joints shall be caulked weather-tight with a silicone sealant. All interior surfaces shall be insulated with 1 inch (25 mm), 2.2 pounds/square feet (10.8 kilogram/square meter) rigid, noncombustible glass fiber insulation. No exposed insulation shall be permitted on the top-wearing surface of the floor of the unit. The floor shall be insulated from underneath. The floor shall have a drain connection.

Access door construction: Access door shall provide access to all internal components, be constructed of 16‑gauge, G-90 galvanized steel with a gasket around the full perimeter of the doorframe, with heavy-duty stainless-steel hinges, and latches.

//Ventilation fan: wired to a thermostat to ventilate the control cabinet and the enclosure.// //The enclosure shall have thermostatically-controlled heaters to ensure proper operation during cold weather.// //Roof curb option: The roof curb shall be manufactured of 16-gauge, galvanized steel and provided with necessary hardware for bolt-together assembly. The curb is to be a minimum of 14 inches (356 mm) high. A 2 inch (50 mm) by ½ inch (13 mm) closed cell curb gasket with adhesive on one side is to be supplied with the hardware.// //Integral water tempering device: A factory-installed thermostatically controlled water valve shall meter an amount of cold water into a stainless-steel mixing chamber to temper 212 degrees F (100 degrees C) water with a 6 gpm (0.38 liter/second) in-flow rate to a 140 degrees F (60 degrees C) discharge temperature to sanitary system.// //Units for DI / RO water shall be specifically designed for that purpose and shall have a stainless steel manually operated drain valve and a stainless-steel float operated fill valve.// Controls: Control subpanel shall be factory-attached to humidifier with all wiring between subpanel and humidifier completed at factory. A wiring diagram shall be included. The controller shall be microprocessor based and shall have the following features or functions:

//Web interface shall have same functionality as the unit keypad/display and shall allow multiple remotely located users to simultaneously view system operation and/or change system parameters. Web interface shall have password-protected secure access and shall be compatible with standard Internet browsers. Web interface shall connect directly to a personal computer or through a system network via Ethernet cable and shall be interoperable with any communication network.// Redundant low water safety control.

Fully modulating (0 to 100 percent) control of humidifier outputs.

Water level control: Automatic refill, low water cut-off, field adjustable skimmer bleed-off functions, and automatic drain-down of humidifier.

//Temperature sensor: A factory mounted sensor, with a temperature range of -40 to 121 degrees C (-40 to 250 degrees F) mounted on the humidifier to enable the following functions:

Maintain the evaporating chamber water temperature above freezing.

Maintain a user-defined preset evaporating chamber water temperature.

Allow rapid warm-up of water in evaporating chamber after a call for humidity, providing 100% operation until steam production occurs.// USB port on the control board for software updates, data backups, and data restoration.// //Up-time optimizer function to keep humidifier(s) operating through conditions such as fill, drain, or run-time faults, as long as safety conditions are met, minimizing production down-time.// //Real-time clock to allow time-stamped alarm/message tracking, and scheduled events.// //Factory commissioning of humidifier and control board, including system configuration as-ordered, factory unit testing, and operation with water before shipping.// //Unit-mounted keypad/display operable within a temperature range of 0 to 70 degrees C (32 to 158 degrees F) and provides backlighting for viewing in low light.// //Alarms, unit configuration, and usage timer values shall remain in nonvolatile memory indefinitely during a power outage.// //The controls shall monitor, control, and/or adjust the following parameters:

Relative humidity (RH) set point, actual conditions in the space (from humidity transmitter), RH offset.

Dew point set point, actual conditions in the space (from dew point transmitter), dew point offset.

Relative humidity (RH) duct high limit set point (switch) and actual conditions.

Relative humidity (RH) duct high limit set point, actual conditions (from transmitter), high limit span, and high limit offset.

Total system demand in % of humidifier capacity.

Total system output in kg/hr (lb/hr).

Drain/flush duration, allowed days, and frequency based on usage.

End-of-season drain status (on standard water systems and if ordered as a DI water option) and hours humidifier is idle before end of season draining occurs.

Window glass surface temperature //in percent RH offset application using separate sensor// with programmable offset.

Air temperature or other auxiliary temperature monitoring with programmable offset //using separate sensor//.

System alarms and system messages, current and previous.

Adjustable water skim duration.// //Programmable outputs for remote signaling of alarms and/or messages, device activation (such as a fan), or for signaling tank heating and/or steam production.// //System diagnostics that include:

Test outputs function to verify component operation.

Test humidifier function by simulating demand to validate performance.

Data collection of RH, air temperature, water use, energy use, alarms, and service messages for viewing from the keypad/display or Web interface.

Service notification scheduling.

Password-protected system parameters.

Keypad/display or Web interface displays in English.

Numerical units displayed in inch-pound or SI units.// Other humidifier control features:

//Interoperability using LonTalk.// //Interoperability using BACnet MS/TP.// //Multiple humidifier tank control. Control system shall be programmed and configured at the factory to control multiple humidifier tanks. Controller functions shall include all functions listed above including the following:

The controller shall control up to //10// //16// humidifiers.

The controller shall have automatic run-time balancing by assigning duty to all humidifier tanks in the multi-tank group such that each humidifier accrues approximately the same hours of duty, thereby ensuring equal wear across all humidifiers in the multi-tank group.

One humidifier tank shall be capable of being controlled as a redundant tank.

One control keypad/display shall be included with each multi-tank group.// //Water level control for DI/RO water: System shall provide for continuous control of water level and shall accommodate the use of deionized or reverse osmosis water with resistance up to 18 M‑ohm/cm. System shall include:

Water level sensing unit comprised of a float operated stainless steel valve for water makeup.

Low water cut-off float switch.

Operation within inlet water supply pressure range of 170 to 550 kPa (25 to 80 psig).// //Access panel interlock switch: The control subpanel shall have an interlock control switch with manual override to remove control voltage when access panel is opened.// //Removable keypad/display: Provide a keypad/display with cable for remote use.// //Control input accessory:// //Cold snap offset transmitter: A window surface temperature transmitter, operating temperature range -29 to 71 degrees C (-20 to 160 degrees F), shall be provided for field installation. Transmitter shall supply its signal (4 to 20 mA) to the microprocessor control system, which shall lower the indoor RH set point to a level 5 percent or greater below the dew point temperature during a cold spell, thus preventing window condensation. The indoor RH shall be automatically returned to the normal setting when the glass temperature rises.// //Airflow proving switch, pressure type: Airflow proving switch shall be diaphragm-operated with pitot tube for field installation. Switch shall have an adjustable control point range of 12.5 to 2988 Pa (0.05 to 12 inch WG) Operating temperature range -40 to 82 degrees C (-40 to 180 degrees F). Compatible with 24, 120, and 240 VAC.// //Airflow proving switch, sail type: Airflow proving switch shall be a sail operated electric switch for field installation. Switch makes at 1.3 meter/second (250 feet per minute), breaks at 0.4 meter/second (75 feet per minute). Maximum operating temperature for sail: 77 degrees C (170 degrees F). Maximum operating temperature for switch: 52 degrees C (125 degrees F).//

Distribution Manifold: Stainless steel, composed of dispersion pipe and surrounding steam jacket, manifold shall span the width of duct or air handler, and shall be multiple manifold type under any of the following conditions:

Duct section height exceeds 900 mm (36 inches).

Duct air velocity exceeds 5.1 m/s (1000 feet per minute).

If within 900 mm (3 feet) upstream of fan, damper or pre-filter.

If within 3 m (10 feet) upstream of after-filter.

SPEC WRITER NOTE: Coordinate…