A/E Name / Issue Description
A/E Project No. / Month, 00, 0000
SECTION 23 57 20 – plate and frame heat exchangers
PART 1 - GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General Conditions and Division 01 Specification Sections, apply to this Section.
B. Specifications throughout all Divisions of the Project Manual are directly applicable to this Section, and this Section is directly applicable to them.
1.02 SUMMARY
A. Perform all Work required to provide and install plate and frame heat exchangers, accessories and trim indicated by the Contract Documents with supplementary items necessary for proper installation and operation.
1.03 REFERENCE STANDARDS
A. References:
1. ASME Section II – Material Specification
2. ASME Section V – Non-Destructive Testing
3. ASME Section IX – Welding and Brazing Qualifications
4. ASME – Pressure Vessel Code
5. ARI Standard 400 – Liquid to Liquid Heat Exchangers
B. The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date.
C. All reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project.
D. All materials, installation and workmanship shall comply with the applicable requirements and standards addressed within all references.
1.04 QUALITY ASSURANCE
A. The plate heat exchanger manufacturer shall have an established and on-going QA/QC program including manuals available for inspection at the plant.
B. The plate and frame heat exchanger manufacturer shall have an extensive background and experience in the design and fabrication of plate heat exchangers. The manufacturer shall have fabricated plate heat exchangers for a minimum of ten (10) years.
C. ARI Certification:
1. Plate heat exchanger shall be certified according to ARI Standard 400 and listed on the ARI Prime Net site (www.ariprimenet.org). If heat exchanger is not ARI certified, then the manufacturer shall provide an independent third party field performance test using mapped ratings and tolerances of ARI Standard 400 to verify performance to specification. Any and all cost associated with correcting a non-performing heat exchanger to meet performance requirements shall be the responsibility of the supplier. Any cost associated with the field performance test shall be included in the price of the heat exchanger.
2. [Alternate for non-certified ARI exchangers: If exchanger is not ARI certified, then the manufacturer shall provide 110% of the heat transfer area of an ARI certified heat exchanger and provide written verification of performance to the specification. Any and all cost associated with correcting a non-performing heat exchanger to meet the performance requirements shall be the responsibility of the supplier.]
D. ASME Certification: The complete assembly shall be factory assembled and tested in accordance with ASME Code, Section VIII, Division I, and furnished with ASME Code Certification (VI Form) for design pressures as specified in this Section.
1.05 SUBMITTALS
A. Product Data and Record Documents:
1. Submit Shop Drawings and product data for manufactured products and assemblies.
2. Indicate empty and operating weights, frame length, height, plate width, and clearance dimension requirements, locations and size and rating of flanged connections. Provide certified performance data heat exchanger hot and cold inlet and outlet water temperatures, flow rates, the design approach temperature, the pressure differential at the design flow rates as shown on the Drawings.
3. Submit design, manufacturing and material data in sufficient detail to verify that heat exchangers meet or exceed specification requirements.
4. Submit test reports of heat exchanger pressure tests.
5. Submit manufacturer's operating maintenance and installation (IOM) instructions including recommended insulation type, thickness and jacket material.
6. Submit samples of plates, gaskets and nuts and bolting materials for each heat exchanger size.
B. Operation and Maintenance Data:
1. At Substantial Completion, the contractor shall submit operation and maintenance data that includes Start-up and shutdown instructions, assembly Drawings, and recommended spare parts lists from the manufacturer.
1.06 DELIVERY, STORAGE and HANDLING
A. Deliver, store, protect and handle products to the Project Site under provisions of Division 01 and Division 20.
B. Protect internals from entry of foreign material by temporary caps on flanged openings.
PART 2 - PRODUCTS
2.01 GENERAL
A. All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction.
B. Furnish and install plate and frame heat exchangers designed with manufacturer's standard fouling allowance and guaranteed to perform to the capacities and pressure drops at the fluid temperatures and flow rates as scheduled. The maximum allowable water pressure drops for the cold and hot sides shall not exceed 10psi.
C. The plate & frame heat exchanger shall be shipped completely assembled, free standing, pressure tested at factory, flushed and cleaned and dried, ready for connection at jobsite.
D. Where field erection is required, the manufacturer shall pressure test units at factory, flush and clean and dried, then knock-down and properly crated and marked for erection at jobsite. Manufacturer’s supervision will be required at jobsite and warranties as factory assembled units remain in effect.
E. Units shall be pressure rated for 150 psig cold (distribution system side) and [300] [150] psig hot (building side).
F. The plate unit shall be designed to withstand full design pressure in each circuit independently The entire unit shall be hydrostatically tested according to ASME Code, Sect. VIII, Div. 1 for 1.3 x design pressure at maximum working temperature.
2.02 manufacturers
A. APV Crepaco, Inc.
B. Tranter PHE, Inc.
C. ITT Bell & Gossett.
D. Alfa – Laval, Inc.
E. Paul Mueller Company (Accu-Therm).
2.03 Frame Components
A. The frame shall be a single pass design with all inlet and outlet connections on the fixed cover.
B. The fixed and movable covers shall be of sufficient thickness for design pressure and code requirements and shall have no welded reinforcements or stiffeners.
C. The frame assembly shall be of bolted construction to allow field erection on the site, where required. Welded frame assemblies are not acceptable.
D. The movable cover shall be provided with steel roller bearing for units greater than 50” in height (from bottom of feet) and for units with port sizes 3” and larger. This allows the removable cover to be moved without additional rigging or handling equipment.
E. The frame assembly’s upper carry and lower guide bars shall be designed to allow for minimum of 25% plate expansion.
F. The portion of the top carrying bar system which comes in contact with the plates shall be stainless steel to prohibit corrosion and facilitate movement of plates. Painted or plated surfaces are not permitted.
G. Provide carbon steel frames, cleaned of mill scale, primed and painted with two (2) coats of baked epoxy enamel.
H. Provide a minimum of two (2) lifting lugs per frame for units with 6 inch ports and larger and designed for lifting assembled flooded unit’s flooded weight.
2.04 Plates
A. Provide Type 316 stainless steel heat transfer plates with herringbone corrugations designed to provide support to adjacent plates to allow pressurization of each circuit to a full differential with no pressure on the adjacent plate channels without deformation of the heat transfer plates.
B. All plates shall be permanently marked to identify quality and material.
C. All ferrous materials in contact with fluids on the hot and cold sides shall be Type 316 stainless steel.
D. Each heat transfer plate shall have built-in self-aligning system to accurately locate plates in the frame assembly and prevent lateral movement and maintain maximum gasket contact under pressure.
E. Plates shall be reinforced on the upper and lower mounting slots to avoid bending on the plates.
F. Overall plate area should be increased by 10% to account for fouling that will occur as the heat exchanger is being used.
G. Heat transfer plates shall include tapered gasket grooves and shall receive standard IIB finish.
H. Provide OSHA compliant aluminum splashguard over channel plate rack and shroud around plate pack.
2.05 Gaskets
A. Gaskets shall be one piece molded nitrile (NRB) rubber compatible with the fluid shown on the plan and schedule and suitable for working temperature up to 250 degrees F. Gaskets shall fit around the heat transfer area and the port holes without the need for glue or adhesive.
B. Gasket shall be permanently marked to indentify quality and material.
C. Gasket to have reliving grooves in the double gasketed areas to prevent any cross-contamination between the hot and cold fluids and cause leak to flow outside of unit.
D.
2.06 Nozzles
A. Provide flanged nozzles (sized as shown on Drawings) on end frames designed for system working pressures as specified. Nozzle velocities shall not exceed 10 fps at the maximum rate of heat transfer as scheduled on the Drawings.
2.07 Bolts
A. Compression bolts shall not require the special tools and shall be equippedwith lock washers at the movable cover to facilitate opening and closing of a unit from the fixed cover.
B. Compression bolts shall be equipped with captive nuts at the fixed cover and threaded nuts at the removable cover. Welding of the nuts to the closure bolt is prohibited.
C. Compression bolts shall be high tensile strength carbon steel. Both the fixed and free nuts shall be heavy duty carbon steel. The nuts and washers shall be cadmium plated and the bolts shall be coated with molybdenum grease for rust protection. Provide plastic sleeve to protect bolts.
D. Bolts shall be provided with rolled threads to reduce galling and double-width hex nuts to distribute the load, plus ball bearing box washers at all critical closing bolts on all units greater than 50” in height.
2.08 Nameplates
A. Each exchanger shall have a stainless steel nameplate permanently attached to the frame. The nameplate shall be mounted off the surface of the heat exchanger to permit the application of 2-inch thick insulation.
B. Nameplate brackets shall be fabricated from thermally nonconductive materials to eliminate sweating.
C. The nameplate shall include as a minimum, the following data stamped on the face of the nameplate:
1. Project name.
2. Customer order number.
3. Equipment designation.
4. Year manufactured.
5. Hot and cold side design.
a. Temperatures.
b. Working pressures.
c. Design flow rates.
d. Pressure differentials at design flow rates.
6. All information required for plate pack compression.
7. Model and serial numbers.
PART 3 - EXECUTION
3.01 INSTALLATION
A. Installation shall meet or exceed all applicable federal, state and local requirements, referenced standards and conform to codes and ordinances of authorities having jurisdiction.
B. All installation shall be in accordance with manufacturer’s published IOM and recommendations.
C. Provide a competent, factory trained representative to completely supervise the installation and to perform all on-Site tests.
D. Install to permit disassembly of plate pack with minimum disturbance to piping and equipment.
E. Support heat exchangers on 6-inch housekeeping pads.
F. The plate heat exchanger shall be tested to full test pressure of 1.3 times the design pressure in one circuit with zero pressure in the alternate circuit.
G. Hydrostatic test shall be in accordance with ASME Section VIII, Division 1, paragraph UG-99.
H. Pipe relief valves to nearest floor drains.
I. Pipe drain and vent valves to nearest floor drain.
J. Fabricate and install a galvanized steel drip pan with a 1-inch drain pipe routed to the nearest equipment floor drain. The dimensions of the drip pan shall be wide and long enough to capture a fluid leak coming from the plate pack.
K. Provide thermometers, wells and temperature and pressure indicating gauges in supply and return piping at the hot and cold side connections of the exchanger.
L. Insulate the heat exchanger frame and plate shroud as required to prevent condensation on cold surfaces.
3.02 Insitu Field Performance testing
A. Each non-ARI certified plate heat exchangers shall undergo a field performance test using the mapped ratings, limits and tolerances of ARI Standard 400 to verify performance to specification.
B. Include in the bid price a independent third party field performance test for each plate heat exchanger in accordance with ARI Standard 400 procedures and tolerances
C. Field test instrumentation shall be per ARI Standard 400 and the calibration of all instrumentation shall be traceable to the National Institute of Standards and Technology.
D. Notify the Owner fourteen (14) calendar days in advance to witness the field performance test.
E. A certified test report of all data shall be submitted to the Engineer prior to Substantial Completion. An officer of the manufacturer’s company shall sign the field certified test report. Preprinted certification will not be acceptable; certification shall be in the original.]
END OF SECTION 23 57 20
The University of Texas / plate and frame heat exchangersMD Anderson Cancer Center / 23 57 20
MS120811 / 2 of 4