VALIDATION OF FISCAL METERING
DETAIL SCOPE OF SERVICES FOR
CALIBRATION/VALIDATION OF FISCAL METERING SYSTEM
1.0
INTRODUCTION
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VALIDATION OF FISCAL METERING
1.1 The purpose of this Contract is to provide Company with Calibration / Re-Certification of metering devices as defined in Scope of Services. 1.2 The Service provider to provide services for calibration / re-certification for metering devices as below. 1.2.1 Static Calibration of Flow Measurement device (UFM, Turbine etc.) 1.2.2 Re-Certification of Liquid Densitometers. 1.2.3 Re-certification of Compact & Bi-Directional Provers 1.2.4 Report generation check from Supervisory system 1.2.5 Flow computer configuration & Calculation check. 1.3 The Service provider shall provide dependable and timely services of Calibration/Recertification of Metering Devices as per detail Scope of Services mentioned herein under. 2.0
GENERAL REQUIREMENTS 2.1
Flow transmitters, Densitometers and Orifice Plates shall be calibrated/recertified in a UKAS or ISO/IEC 17025:2005(E) accredited facility and a traceable calibration certificate shall be provided. 2.2 Bidirectional provers shall be calibrated/recertified at Client Site. 2.3 Metering Devices that need to be periodically calibrated & recertified; the schedule shall be finalized during award of Contract. 2.4 Service provider shall provide calibration/recertification services to metering device. 2.5 The Service provider shall nominate a representative for this Contract and shall be responsible for all co-ordination activities. 2.6 Company shall pack and arrange transportation of metering device (through authorised freight forwarder) to calibration facility and delivering them back to Company site. Packing requirements from Company’s site will be provided by Company. However, packing requirements from the calibration facility shall be provided by Service provider. 2.7 If required as an option at Company’s request, the Service Provider shall arrange for transportation of metering device from Company to calibration facility and delivering them back to Company site. Service Provider shall arrange proper packaging and transportation of equipment to avoid any damage and ensure calibrations are not disturbed. 2.8 The certifications shall be traceable to National Institute of Standards and Technology (NIST) or National Metrology Institute (NMI). The calibration laboratory shall be able to prove the validity of the stated accuracy, traceability and total uncertainty if required. 2.9 The Service Provider shall provide approved calibration/re-certification certificates and report along with each metering device & test equipment. 2.10 The certificate should include the following information as a minimum. Customer details, details of unit calibrated such as manufacturer, model, serial number, date of calibration, date of expiry, traceability, calculated uncertainty, calibration record with as found & as left values & errors both on rising and falling, laboratory conditions, master test equipment or reference standard used, calibration procedure and a brief description of calibration. 19-Jan-11
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VALIDATION OF FISCAL METERING 2.11 If any adjustment or repair is made, or replacement part(s) fitted, then this will be detailed on the certificate. 2.12 In addition to calibration results the certificate should include information about traceability of calibration, total uncertainty of the calibrated equipment taking into account uncertainty of calibration standard and number of calibration transfers involved, whether the reported uncertainty is standard or expanded, coverage factor used, level of confidence and method of uncertainty evaluation. 2.13 The Service Provider shall check the equipment and identify if it requires any remedial work prior to calibration/re-certification. 2.14 Repairing or replacement of spares parts have to be agreed as and when required and Service Provider will invoice it separately. 2.15 If found and jointly agreed as beyond repair, the equipment shall be deleted from the Scope of Services for the remaining duration of the Contract. 2.16 The Service Provider shall maintain historical calibration/re-certification data for all devices covered under this Contract for the duration of the Contract and submit to Client on request. The Service Provider shall submit Planning & Progress report at regular intervals to the Client. 2.17 Service Provider shall be able to demonstrate their capability in respect of accuracy, traceability and total uncertainty of certified test equipment. When witnessing activities at these facilities, as a minimum the following should be made available. Valid certification documents for master test equipment or Reference Standards used to calibrate/recertify. An ongoing process exists to verify and maintain master test equipment or Reference Standards are within their stated accuracy. Evidence exists that calibration/recertification made are consistent with other similar facilities and are trust worthy. The Master Test Equipment or Reference Standard used shall be four times more accurate than the equipment being calibrated. If equipment has multiple ranges/units all ranges/units are to be calibrated. Calibration certificates are to be provided for each item calibrated and Service Provider shall submit all certification reports in electronic and hard copy format. •
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3.0 SCOPE OF SERVICES 3.1
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Calibration of DP Transmitters 3.1.1 The Service Provider shall provide services for static calibration of DP Transmitters as listed in Appendix-I. The transmitters shall be calibrated in a UKAS or ISO/IEC 17025:2005(E) accredited facility and a traceable calibration certificate shall be provided. 3.1.2 The differential pressure transmitter will be calibrated at a static pressure within 5 bar of the operating static pressure, by applying differential pressure across the following points of the range unless otherwise stated (0%, 25%, 50%, 75%, 100%, 110% (over range), 100%, 75%, 50%, 25%, and 0%). 3.1.3 The transmitter will then be checked at atmospheric conditions to obtain the Page 3
VALIDATION OF FISCAL METERING
3.2
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"footprint" calibration points across the same range as before (0%, 25%, 50%, 75%, 100%, 110% (over range), 100%, 75%, 50%, 25%, and 0%). 3.1.4 The calibration certificate should then show both sets of results, high static and footprint. 3.1.5 The unit for pressure, differential pressure, temperature is to be in compliance with the existing Engineering Unit, and the transmitter output unit will be mA or voltage in accordance with the standards. 3.1.6 An ‘As Found’ (AF) calibration must be completed before any remedial or corrective work is carried out. If no work is required and the calibration is found to be acceptable, this will be the ‘As Found/As Left’ calibration. If repair work or adjustment is required, then an ‘As Left’ (AL) calibration must be performed. 3.1.7 If a transmitter is found faulty, Service Provider has to advise company with reasons and recommendations along with cost of repair for company review and approval. Transmitter repair is at the sole discretion of client and repair has to be carried out only after client approval. 3.1.8 The following details of transmitters will be provided by Client at the time of calibration request for individual transmitters. The Service Provider shall request other details that may be required for executing calibration. Manufacturer: Transmitter Model: Serial No.: Operating Pressure: Required Calibration Range: Tag Number in Which Transmitter will be used: Calibration of Liquid Densitometer 3.2.1 The Service Provider to provide services for re-certification of Solartron Mobery Liquid Densitometers as listed in Appendix-II .Liquid densitometers should be re-certified by a UKAS or ISO/IEC 17025:2005(E) accredited facility. 3.2.2 The unit is to be calibrated in air and product at 20 deg C and 1 BarA. The calibration certificate must show constants appropriate for the operating conditions mentioned below and temperature and pressure co-efficient data. 3.2.3 As part of recertification new temperature & pressure coefficient shall be established in addition to density coefficient. 3.2.4 The temperature coefficient shall be checked by increasing the temperatureto 50 Deg C. 3.2.5 The unit for density is to be kg/m3. 3.2.6 The Service Provider shall submit complete method statement for Client approval for executing calibration. 3.2.7 If the densitometers are calibrated with fluids of different densities the Service Provider shall confirm that the certification is valid for operating density range and the certificate should indicate this range.
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VALIDATION OF FISCAL METERING 3.2.8 If a densitometer is found faulty, Service Provider has to advise Client the reasons along with recommendations & cost of repair for Client review and approval. Densitometer repair is at the discretion of Client and repair has to be carried out only after Client approval. 3.2.9 The calibration laboratory shall provide a user calibration certificate stating pressure coefficients appropriate only for the operating conditions that will be provided. 3.2.10The following details of transmitters will be provided by Client at the time of calibration request for individual densitometers. The Service Provider shall request other details that may be required for executing calibration. Manufacturer Model No. Serial No. Service Conditions Operating Pressure(Approx.) Operating Temperature(Approx.)
3.3 Calibration of Compact & Bi-Directional Provers The Service Provider to provide services for re-certification of Compact Prover and BiDirectional Prover located at Client on-shore facilities. The calibration shall be done at Client site. Below is brief description of concepts behind compact and bi-directional provers and work scope. 3.3.1Concept for Water Draw Calibration of Compact Prover. The calibration will consist of collecting water being displaced by the Prover Piston during a calibration run. The Compact Prover volume is determined by measuring the amount of water displaced by the Piston as it passes the optical detector switches. Flexible hoses will be connected such that water is taken from the reservoir, through the pump, and then to the upstream calibration point of the Compact Prover. A second hose will be taken from the downstream calibration point of the Compact Prover such that the water will return to the reservoir via the Primary Measure. By this method a closed loop circulation facility is maintained. The optical switches of the Compact Prover are connected to the Water Draw control box circuit which is then connected to the solenoid valve. The flow of water into the Primary Measure will be regulated by the solenoid valve during the Water Draw process. 3.3.2Concept for Water Draw of Bi-Directional Prover. The calibration will consist of collecting water being displaced by the Prover Sphere during a calibration run. The Bi-Directional Prover volume is determined by measuring the amount of water displaced by the Sphere as it passes the detector switches. Flexible hoses will be connected such that water is taken from the reservoir, through the pump, and then to the upstream calibration point of the Bi-Directional Prover. A second hose will be taken from the downstream calibration point of the Bi-Directional Prover such •
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VALIDATION OF FISCAL METERING that the water will return to the reservoir via the Primary Measure. By this method a closed loop circulation facility is maintained. The switches of the Bi-Directional Prover are connected to the Water Draw control box circuit which is then connected to the solenoid valve. The flow of water into the Primary Measure will be regulated by the solenoid valve during the Water Draw process. 3.3.3Specific Scope of Services: 3.3.3.1 The Service Provider shall supply all measures, measuring devices and associated equipment required to carry out the calibration. All measures and measuring devices shall have valid and traceable calibration certificates. 3.3.3.2 The Service Provider shall supply the following equipment as minimum: 1. Test Measures, 2. Hoses & Fittings and solenoid valves as required 3. Certified Digital Thermometers 4. Certified Pressure Gauges 5. Water Storage Tank 6. Buffer Tank 7. Water Pump 8. Stop Watch 3.3.3.3 Provision of manpower who are qualified, experienced and technically competent to perform the calibration. 3.3.3.4 All procedures utilised by the vendor and calibration & calculation shall be in accordance with latest version of API MPMS Chapters 4, 11 & 12. 3.3.3.5 In order to assure a uniform volume of calibration, all volumetric test measures and other measurement devices shall be traceable to the U.S. National Institute of Standards and Technology or other certifying agency. 3.3.3.6 The Service Provider shall use minimum sizes of test measures based on prover details provided so as to achieve the required calibration accuracy. 3.3.3.7 The Service Provider shall advise Client of any pre-calibration preparations required prior to mobilizing its resources to avoid any sort of delays at site. 3.3.3.8 The Service Provider shall provide detailed method statement & calibration procedure for execution of the job and if required participate in Job Safety Analysis. •
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VALIDATION OF FISCAL METERING 3.3.3.9 The Service Provider shall provide duly approved calibration reports to Client upon completion of the calibration. Details of calculation shall be provided prior to issuance of final report for checking by Client to ensure that no mathematical errors are made and to verify results issued by the Service Provider. The report shall contain base conditions, calibration certificates and traceability details of all test measures and measurement devices. The certificate shall report the base volumes in m3 at our standard conditions and refer the volume(s) to the tag numbers of the detector switches. 3.3.3.10 The report must be provided to the Company within 10 working days of completion of the work. 3.3.3.11 Service Provider to advise preparatory work required for the calibration and potable water & electrical power requirements for water draw kit and any site assistance required. 3.3.3.12 The following details of provers will be provided by Client at the time of calibration request for individual provers. The Service Provider shall request other details that may be required for executing calibration. Manufacturer: Model No.: Serial No.: Size: Number of Volumes: Nominal volume: Capacity: Flow tube I.D: Wall thickness:
3.4 Calibration of Orifice Plates 3.4.1 The Service Provider Scope of Services under this section is to provide services for re-certification of orifice plates in metering applications as detailed in Appendix IV. 3.4.2 Orifice plates should be re-certified by UKAS or ISO/IEC 17025:2005(E) accredited facility in accordance with ISO 5167. 3.4.3 The orifice plates will be removed and inspected by Client and based on it’s condition Client may request the Service Provider for re-certification. 3.4.4 Important Requirements are as below: The roughness of the upstream side of the plate shall have a roughness criterion Ra<10-4d within a circle of diameter not less the D and which is concentric with the orifice. •
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VALIDATION OF FISCAL METERING The flatness of the plate shall be checked. The uncertainty requirement for this dimension can be met using feeler gauges. The thickness of orifice edge “e” of the orifice shall be between 0.005D and 0.02D The difference between the values of “e” measured at any point on the orifice shall not be greater than 0.001D The thickness E of the plate shall be between e and 0.05D The value “d” of the diameter of the orifice shall be taken as the mean of the measurements of at least four diameters at approximately equal angles to each other. The orifice shall be cylindrical and no diameter shall differ by more than 0.05% from the value of the mean diameter. The diameter “d” shall in all cases be greater than or equal to 12.5mm. The diameter ratio, b=d/D, shall always be greater than or equal to 0.1 and less than or equal to 0.75. In addition, the following to be checked: downstream face shall be checked for its flatness & surface condition and for a) it’s parallelism with upstream face b) angle of bevel c) edges. The unit for measurement is to be millimeter. 3.4.5 The Service Provider shall issue a certificate consisting of all parameters checked against related clauses of ISO 5167 requirement. If the plate is rejected deviations shall be included. 3.4.6 If an orifice plate is rejected, Service Provider has to advise Client the deviations along with recommendations & shall submit proposal of repair for Client review and approval. Orifice plate repair/re-machining is at the discretion of Client and repair has to be carried out only after Client approval. 3.4.7 An ‘as found’ calibration must be completed before any remedial or corrective work is carried out. If no work is required and the calibration is found to be acceptable, this will be the ‘as found/as left’ calibration. If repair work or adjustment is required, then an ‘as left’ calibration must be performed. •
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4.0
SERVICE PROVIDER TO PROVIDE Service Provider’s responsibility in respect of performance of services at Company site under this Contract will include, but not be limited to, the following: 4.1 Provision of valid work visas/resident permit, driving license, admission badges and other mandatory authorizations of Government or local bodies that may be required from time to time for their personnel providing service under this contract (for working inside Qatar). 4.2 Provision of Manpower, Materials, Consumables, Tools, Instruments and Equipment required for completing Scope of Services in professional and successful manner. 4.3 Provision of air tickets, medical examinations (normal and emergency), transportation to and from work location, meals, accommodation, safety and welfare of his own personnel providing service under this contract.
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VALIDATION OF FISCAL METERING 4.4 Service Provider shall provide all personnel performing the Services with personnel protective clothing and safety equipment for the performance of the Services, to include but not be limited to: i. Coverall (Nomex) ii. Safety hats, as per ANSI Z89.1 1986 iii. Safety footwear, as per ANSI 1991. iv. Hearing protection where noise level exceeds 85 dBA. v. Safety glasses to specification EN 166 or equivalent. vi. Work gloves, leather or cotton. 4.5 Service Provider should provide all the transportation required for their personnel either inside or outside country.
5.0
CLIENT TO PROVIDE 5.1 5.2 5.3 5.4
Assistance in obtaining the Permit to Work Out of hours access (if required) Assistance in obtaining gate passes as required. Any datasheets or information related to the instrument as requested by the Service Provider if it is available with Company. 5.5 Advanced notification for any Urgent calibration required.
6.0
ENVIRONMENT, HEALTH & SAFETY 6.1 General 6.1.1 Service Provider must provide a general safety induction to their personnel including, but not limited to, commonly accepted safe Servicing practices, the proper use of and care for personal protective equipment (PPE), hazard recognition, reporting unsafe acts and conditions, reporting incidents / injuries and safe material handling. 6.1.2 All Service Provider personnel working at Site shall undergo the initial Company safety orientation training prior to commencement of Services. 6.1.3 Service Provider’s personnel employed in the performance of the Services will be fully trained and currently qualified to carry out said Services. The list of approved Safety Training Providers is listed in Attachment 1. 6.1.4 Service Provider shall require all persons employed directly or indirectly by the Service Provider to wear clothing suitable for existing Services, weather and environmental conditions at all times. Personal protective equipment must meet Company defined standards. 7.1.5 Service Provider shall implement all other Company requirements for safe practices as defined in Company safety procedures or requested by Company. 7.1.6 Company shall be at liberty to require Service Provider to remove from the services any person employed directly or indirectly by Service Provider to perform Services, who in the opinion of Company is guilty of misconduct or is lacking in required competence
7.2 Access Access to and from the Site will be through such gates and by such routes as will be defined by Company. Service Provider is to operate his own vehicles with the minimum of inconvenience to other traffic on the Company’s business. Access may be altered from time to time during the period of the Contract and Service Provider is to include in his prices for any costs and inconvenience so caused. The speed limits imposed within the Company complex must be 19-Jan-11
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VALIDATION OF FISCAL METERING observed at all times and all vehicles must be fit for the purpose for which they are used. 7.3 Safety Philosophy The Service Provider will ensure and maintain a safety philosophy which will include, but not be limited to, the following: 7.3.1 Specific instruction to Service Providers personnel defining responsibilities for safety of personnel and equipment during normal operations and possible emergencies. 7.3.2 Indoctrination of each employee, regardless of prior experience, including an explanation of safety related aspects of the job to ensure that the employee can fill the position in a safe and effective manner. 7.3.3 Instruction of employees on Works procedures, safe practices, Company safety rules, standards, emergency duties and applicable regulations. 7.3.4 Good housekeeping practices. 7.3.5 General Safety education.
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