The Metropolitan Sewer District of Greater Cincinnati

Transcription

1 The Metropolitan Sewer District of Greater Cincinnati Little Miami WWTP Sludge Handling Process Upgrade Project ID Date Issued: 06/14/2010 ADDENDUM NO. 2 This addendum will only be distributed via , but will remain available for viewing on the MSD website at on the project-specific web page. No hard copy will follow. Any questions you may have on the information contained in this addendum should be directed to the Project Manager, Jeffrey Dean Project Delivery at NOTE: Please be sure to enter the TOTAL NUMBER of Addenda issued on the Official Bid Form contained in the Bidding Booklet prior to submitting your bid. The attention of all bidders is directed to the following additions and/or deletions to the Contract Documents. ADDED ITEMS ARE UNDERLINED AND DELETED ITEMS ARE STRUCK THROUGH The Contract Documents for the above referenced project are amended and revised as follows: DETAILED PROVISIONS (VOLUME III): ADD the following Section Transmitters: Page 1 of 1

2 SECTION TRANSMITTERS PART 1--GENERAL 1.01 DESCRIPTION This section specifies requirements for transmitters. Application requirements are specified in Section REFERENCES This section contains a reference to the following document. All references shall be to the current edition of the document unless specifically stated otherwise. Additional references are listed in Section They are a part of this section as specified and modified. In case of conflict between the requirements of this section and those of the listed document, the requirements of this section shall prevail. Unless otherwise specified, references to documents shall mean the documents in effect at the time of Advertisement for Bids or Invitation to Bid (or on the effective date of the Agreement if there were no Bids). If referenced documents have been discontinued by the issuing organization, reference to those documents shall mean the replacement documents issued or otherwise identified by that organization or, if there are no replacement documents, the last version of the document before it was discontinued. Where document dates are given in the following listing, reference to those documents shall mean the specific document version associated with that date, whether or not the document has been superseded by a version with a later date, discontinued or replaced. Reference NEMA 250 Title Enclosures for Electrical Equipment 1.03 SUBMITTALS Submittals shall be provided as specified in Section MSD ID No Transmitters

3 PART 2--PRODUCTS 2.01 GENERAL Unless otherwise specified, measuring elements and transmitters shall comply with the following requirements: 1. Output indicators complying with paragraph shall be provided with any transmitter that does not include an integral indicator. Indicators, whether integral or separate, shall be calibrated in process units, and said units shall be engraved on the indicator scale plate. 2. Two-wire type transmitters shall have the operating power derived from the signal transmission circuit, unless otherwise specified. 3. Transmitters output shall be 4 to 20 milliamperes two or four wire type. Two or four wire type transmitters shall be current regulated and shall drive any load between 0 and 550 ohms with the power supply at 23 volts DC. 4. Transmitters shall meet specified performance requirements with load variations within the range of 0 to 600 with the power supply at 24 volts DC, for all two wire type transmitters. 5. Transmitter output shall be galvanically isolated. 6. Time constant of transmitters used for flow or pressure measurement, including level transmitters used for flow measurement, shall be adjustable from 0.5 to 5.0 seconds. 7. Transmitter output shall increase with increasing measurement, unless measuring a vacuum. 8. Transmitter enclosures shall be rated NEMA 250, Type 4 at a minimum, unless otherwise specified. 9. Transmitters located outdoors shall be provided with surge protectors: Rosemount Model 0470N1N0A, Taylor 1020FP, or equal. 10. Where transmitter is located in an area classified as hazardous, it shall be made safe by means of an intrinsic safety barrier as specified in paragraph MSD ID No Transmitters

4 2.02 OUTPUT INDICATOR Output indicator shall be 90 degree movement milliammeter, 2-1/2-inch enclosed in a NEMA 7/9 meter case. A diode shall be provided to maintain loop continuity in case of meter movement failure or removal. Accuracy shall be within 2 percent of span. Indicator scale shall be graduated in process units and said units shall be engraved on the indicator scale plate INTRINSIC SAFETY BARRIERS Intrinsic safety barriers for two-wire transmitters shall be of the active, isolating, loop powered type. Barrier shall be Measurement Technology LTD. type MT3042, Stahl 9001/51-280/110/14, Pepperl-Fuchs KFD0-CS-Ex2.51P, or equal. Fieldbus IS barriers shall be Stahl or Pepperl-Fuchs and shall match OWNER s existing equipment INSTRUMENTATION SPECIFICATION SHEETS (INSTRUSPEC) General requirements for instruments specified in this section are listed on INSTRUSPEC sheets in paragraph Application requirements are specified in the instrument index, paragraph , and/or on the Drawings PRODUCT DATA The following information shall be provided in accordance with Section : 1. Data specified in paragraph PART 3--EXECUTION 3.01 INSTALLATION Installation requirements are specified in Section TESTING Testing requirements are specified in Section MSD ID No Transmitters

5 3.03 INSTRUSPEC SHEETS The following INSTRUSPEC sheets are included in this section: INSTRUSPEC Symbol Instrument Description Measurement Power* Requirement Communication* FIT Flow Indicating Transmitter Flow 120VAC 4-20mA (Magnetic flow meter) LIT Level Indicating Transmitter Level Loop 4-20mA (Radar) PIT Pressure Indicating Transmitter Pressure Loop 4-20mA * Summary Information Only, see detailed INSTRUSPECS for complete requirements. MSD ID No Transmitters

6 Instrument Function: Instrument Description: Signal Input: FIT Flow measurement Flow Indicating Transmitter (Magnetic flow meter) Process Signal Output: 4-20 milliamperes, as specified in paragraph Process Connection: Meter Size: As noted on the Instrument and Device Index, section , and on the Contract Drawings. Connection Type: Raised Face Flanged ASME/ANSI B16.5 Class 150 in sizes up to and including 24. For sizes larger than 24 ANSI/AWWA C Class D (150 psi). Flanged Material: Carbon steel. Pressure Rating: Meter system must be fully rated to the same design pressure at the flanges. Product Requirements: General: Function: Measure, indicate, and transmit the process flow in a full pipe. Meter must be a full bore meter with the magnetic field traversing the entire cross-section of the flow tube. Insert magmeters or multiple single point probes inserted into a spool piece are not acceptable. Type: Magnetic flowmeter, operating based on Faraday s law, using a pulsed dc type coil excitation with high impedance electrodes. Magnetic flow meter shall be provided as a system consisting of a flow tube and integral or remote converter/transmitter (as indicated on the Drawings) complete with interconnecting cables. Where specified, the converter/transmitter shall be mounted integral to the flow tube. Where pipe run size is different from specified flow tube size, uniformly diverging swages with a total angle between walls not exceeding 15 degrees shall be provided. MSD ID No Transmitters

7 FIT (continued) Excitation power requirements shall not exceed 15 voltamperes. Service: Performance: The service shall be as indicated on the contract drawings. Range: 1000 to 1 for 6 and smaller, 1500 to 1 for 8 and larger. Accuracy: +/-0.2% of rate Repeatability: +/-0.05% or +/ ft/s, whichever is greater. Calibration: Shall be per compliance with OIML R49 Type P standards. Flow Range: As noted on Instrument and Device Index, section Converter/ transmitter shall be suitable for full-scale flow rates from 1.0 to 33 feet per second. Flow Tube: Meter Tube Material: Flow tubes shall be carbon steel for sizes ¾ -8 and 304 stainless steel for 10 and larger. All flow tubes shall be full-body flanged construction. Liner Material: Flow tube liners for sludge service shall be polypropylene for up to 8 or Elastomer for 10 and larger. Electrode Type: Conical self cleaning electrodes. Electrode Material: 316 stainless steel or greater as recommended by the manufacturer. Enclosure Classification: Standard as submersible in clean water and buriable with overhead protection (IP68, NEMA 6P). Housing Material: Shall be Plastic or Epoxy Coated Carbon Steel. Grounding: Grounding rings and grounding electrodes shall be provided per manufacturer s recommendation. Meters without grounding electrode shall require grounding ring. MSD ID No Transmitters

8 FIT (continued) Flow Tube (continued): Transmitter: Submergence: Continuous in clean water to 30ft and direct burial 3 to 16 ft IP68/NEMA6P. Octagonal Bore Design: Sensors in sizes of 1.5 to 8 shall be Octagonal Bore design for blunt profile and reduced piping diameters. Sensors in sizes 10 and larger shall be provided with full bore design to reduce head loss. Cable: Only one cable shall be required between sensor and remote transmitter. Meters with multiple cable requirements are not acceptable. Power: 120 VAC. Display: Three line back-lit graphical LCD display with capacitive keys allows for external configuration without removing covers and compromising the integrity of environmental classifications. The display will also be used for simultaneous indication of flow rate and total flow in user-selectable engineering units, and readout of diagnostic error messages. Bi-direction flow: Forward and reverse flow indication, total and rate 2x10-digit user configurable display. Totalizers: Three 9-digit totalizers for forward, reverse and net. Enclosure: Transmitter housing shall be powder coated cast aluminum, and shall be rated NEMA 4X. Though The Glass Control (no key pad; capacitance keys) HART protocol standard. Integral Transmitters shall be rotatable up to 270 degrees. Transmitter Module, 180 degrees rotatable. IP 67 Calibration shall be per OIML R49 Type P standards Type P continuous self checking capabilities (not just on start-up). Redundant data storage in sensor and transmitter with continuous replication of calibration factors, meter size, serial numbers, and site-specific settings. Infrared service port for meter configuration and diagnostic interrogation. MSD ID No Transmitters

9 Transmitter (continued): Warranty: Acceptable Manufacturers: FIT (continued) The transmitter shall contain all electronics associated with the magnetic flow meter system. The transmitter shall contain self diagnostics and shall be interchangeable with other units of the same. Features shall include current signal output simulation, and empty pipe detection. Equipment and service warranty shall be delivered free of defects in material and workmanship and that services shall be free of defects in workmanship. The warranty period for equipment shall end twenty-four (24) months after date of shipment. Software warranty shall be delivered free of defects and will, when properly installed, execute in accordance with published specification. The warranty period for software shall end twelve (12) months from date of shipment. ABB WaterMaster with no exceptions, to match OWNER s existing equipment. Execution: Installation: Install in accordance with manufacturer's instructions, API RP551, and the specified functional requirements, including but not limited to complying with the straight run requirements upstream and downstream of the flow meter. Spool pieces or swages shall be bolted to each end of the flow tube and the entire assembly slid into the pipe run as a unit. Flange bolts shall be tightened to tube manufacturer's specified torque. Cable: The signal cable between the primary element and transmitter shall be provided by the system manufacturer. A sufficient length of cable shall be provided for installation of a continuous run between the primary element and the transmitter. MSD ID No Transmitters

10 Application: Test and Calibration: FIT (continued) Application and setup shall be in accordance with manufacturer s recommendations and as specified in paragraph Test Mode: Provide the ability to verify the accuracy of the unit and the integrity of the current loop without any external equipment. Meter calibration shall be compliant to OIML R49 Type P, self-calibration requirements. Meter must be able to generate periodical simulated signals that verify that the output is within predefined limits. Coil Inductance and resistance along with electrode voltage and impedance must be verifiable through diagnostic functionality. Warnings and Alarms: Shall be classified to NAMUR NE 107 standards. Meter must have ability to display severity of warning with maintenance, check-function, failure and out of spec warning indications. Alarm priorities shall be classified as: None; Maintenance; Out-of-spec; Function check; and Error. The duration of an alarm, time-summation for the alarms and time elapsed since last alarm message must be recorded and accessible. All replacement transmitters shall be interchangeable without need for programming sensor calibration factors, meter size, site information, and serial numbers. Insitu Calibration Verification: This system shall be used to verify in a quantifiable manner the meter s current conditions vs. the meters condition when originally manufactured. This calibration verification of the meter shall be performed without need for physical access to the meter flow tube. MSD ID No Transmitters

11 FIT (continued) Test & Calibration (cont d): Measurement diagnostics shall be in accordance with OILM standards, which shall include self-verification off the flow meter system including, transmitter, cable, electrodes and coils; through software the system shall have the ability to print a certificate of compliance to OIML accuracy standards. Verification software shall be provided with the flowmeters, and shall provide the ability to maintain, print and compare previous calibration information in a trend, bar graph, and text report format. Meters shall be designated, manufactured, and calibrated in an ISO9001, UKAS/NAMAS, NIST, or NATA certified facility. Facility must have the capability to hold the flow rate at the specified calibration points for a minimum of five minutes to allow stabilization for flow and repeatability point checks. Additional calibration and testing requirements shall be in accordance with specification Section MSD ID No Transmitters

12 3.03 INSTRUMENT SPECIFICATION SHEET--INSTRUSPEC Instrument Function: Instrument Description: LIT Level Measurement Level Indicating Transmitter (Radar) Power Supply: As specified in paragraph Signal Input Process Signal Output: 4-20 milliamperes, as specified in paragraph Product Requirements Signal Converter/Transmitter: Signal type: Pulsed radar, 24 to 26 GHz range, maximum output power of 1.0 mwatt. Enclosure: NEMA 4X remote mount and shall be certified for installation in a Class I, Division 2 hazardous location. Display: 4-digitLCD scaled in engineering units. Measuring range: ft. Accuracy: ±0.5 in. Analog Output: One isolated 4-20 ma, minimum of 300Ω. Ambient Temperature Range: -20 to +140 F. Process Temperature Range: -40 to +300 F Pressure Range: full vacuum to 120 psig. Sensor: 6 inch horn Process Connection: 6 inch, 150 lb. ANSI flange. Wetted Materials: 316 SS, PTFE, Viton, or as specified in Section Instrument and Device Index. MSD ID No Transmitters

13 Instrument Identification LIT (continued) Accessories: Provide necessary mounting hardware and cable glands. Provide handheld infrared programming device, or programming software and cable length. Acceptable Manufacturers: Ohmart Vega Vegapuls 66, without exception to match OWNER s exist equipment Installation: Install in accordance with manufacturer's instructions and the Engineer s installation detail. Contractor to verify size and type of specified tank connection with approved tank submittals. MSD ID No Transmitters

14 Instrument Function: Instrument Description: PIT Pressure measurement Pressure Indicating Transmitter Power Supply: As specified in paragraph Signal Input: Process Signal Output: 4-20 milliamperes, as specified in paragraph Process Connection: 1/2-inch male NPT, 316Ti stainless steel. 1-1/2 inch male NPT, 316 stainless steel for direct mounting to process piping 1-1/2 inch diameter and larger. Pressure transmitters mounted to annular rings shall be configured as shown on the instrument detail in the contract drawings. The entire assembly shall be provided by the annular ring supplier, including the annular ring, the pressure transmitter, and the pressure switch. All devices shall be pre-mounted, filled with silicone oil, and pre-calibrated by the supplier at the factory. Product Requirements: Pressure transmitter shall be capacitance type with a ceramic pressure sensing diaphragm. Span shall be adjustable over a 20:1 or greater range. Overrange capacity without affecting calibration shall be not less than listed below. Volumetric displacement shall not exceed 0.01 cubic inches over the specified span. Adjustable dampening and external zero adjustment shall be provided. Accuracy shall be 0.1 percent of span. Transmitter housing shall be rated NEMA 4X and shall be listed for installation in a Class I, Division 2 hazardous location. Transmitter shall be provided with an integral 4 digit LCD display with bargraph. Transmitter shall be available with the following adjustable ranges for gage pressure applications: MSD ID No Transmitters

15 PIT (continued) Nominal Range Minimum Span Overpressure Rating PSI PSI PSIG 0 to to to to to Acceptable Manufacturers: Execution: Installation: Rosemount Model 3051T without exception to match OWNER s existing equipment.. Install in accordance with manufacturer's instructions and the recommendations of API RP551 to the specified requirements. Root valves shall be provided at all process pressure taps, except where mounted to annular rings, per the Contract drawings. Gage valves shall be provided at the instrument where the instrument is not within sight of the root valve or where two or more instruments are connected to a single tap. Safety instruments shall not be connected to the same process tap as instruments used for control, indication, or recording. Unless otherwise specified, pressure instruments shall be located as close as practical to the process tap but shall be positioned to permit observation and maintenance. Pressure instruments shall not be supported from process piping less than 1/2-inch diameter. Pressure transmitters directly mounted to process piping 1-1/2 inch diameter and larger shall be directly connected to the process pipe with a 1-1/2 inch female weld-o-let or similar connection. The display shall face so that is easily readable. MSD ID No Transmitters

16 Application: PIT (continued) Application and setup shall be in accordance with manufacturer s recommendations and as specified in paragraph Test and Calibration: In accordance with specification Section END OF SECTION MSD ID No Transmitters