《DEP 32.32.00.11-Gen.pdf》由会员分享，可在线阅读，更多相关《DEP 32.32.00.11-Gen.pdf（33页珍藏版）》请在三一文库上搜索。
1、TECHNICAL SPECIFICATION TURBINE FISCAL METERING SYSTEMS FOR LIQUID HYDROCARBON DEP 32.32.00.11-Gen. November 1993 DESIGN AND ENGINEERING PRACTICE USED BY COMPANIES OF THE ROYAL DUTCH/SHELL GROUP This document is confidential. Neither the whole nor any part of this document may be disclosed to any th
2、ird party without the prior written consent of Shell Internationale Petroleum Maatschappij B.V., The Hague, the Netherlands. The copyright of this document is vested in Shell Internationale Petroleum Maatschappij B.V., The Hague, the Netherlands. All rights reserved. Neither the whole nor any part o
3、f this document may be reproduced, stored in any retrieval system or transmitted in any form or by any means (electronic, mechanical, reprographic, recording or otherwise) without the prior written consent of the copyright owner. PDF created with pdfFactory Pro trial version PREFACE DEP (Design and
4、 Engineering Practice) publications reflect the views, at the time of publication, of: Shell International Oil Products B.V. (SIOP) and Shell International Exploration and Production B.V. (SIEP) and Shell International Chemicals B.V. (SIC) The Hague, The Netherlands, and other Service Companies. The
5、y are based on the experience acquired during their involvementwith the design, construction, operation and maintenance of processing units and facilities, and they are supplemented with the experience of Group Operating companies. Where appropriate they are based on, or reference is made to, nation
6、al and international standards and codes of practice. The objective is to set the recommendedstandard for good design and engineeringpractice applied by Group companies operating an oil refinery, gas handling installation, chemical plant, oil and gas production facility, or any other such facility,
7、and thereby to achieve maximum technical and economic benefit from standardization. The information set forth in these publications is provided to users for their consideration and decision to implement. This is of particular importance where DEPs may not cover every requirement or diversity of cond
8、ition at each locality. The system of DEPs is expected to be sufficiently flexible to allow individual operating companies to adapt the information set forth in DEPs to their own environment and requirements. When Contractors or Manufacturers/Suppliers use DEPs they shall be solely responsible for t
9、he quality of work and the attainment of the required design and engineering standards. In particular, for those requirements not specifically covered, the Principal will expect them to follow those design and engineering practices which will achieve the same level of integrity as reflected in the D
10、EPs. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting from his own responsibility, consult the Principal or its technical advisor. The right to use DEPs is granted by SIOP, SIEP or SIC, in most cases under Service Agreements primarily with companies of the Royal Dutch/S
11、hell Group and other companies receiving technical advice and services from SIOP, SIEP or SIC. Consequently, three categories of users of DEPs can be distinguished: 1)Operating companies having a Service Agreement with SIOP, SIEP, SIC or other Service Company. The use of DEPs by these Operating comp
12、anies is subject in all respects to the terms and conditions of the relevant Service Agreement. 2)Other parties who are authorized to use DEPs subject to appropriate contractual arrangements. 3)Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1) or
13、 2) which requires that tenders for projects, materials supplied or - generally - work performed on behalf of the said users comply with the relevant standards. Subject to any particular terms and conditions as may be set forth in specific agreements with users, SIOP, SIEP and SIC disclaim any liabi
14、lity of whatsoever nature for any damage (including injury or death) suffered by any company or person whomsoever as a result of or in connection with the use, application or implementation of any DEP, combination of DEPs or any part thereof. The benefit of this disclaimer shall inure in all respect
15、s to SIOP, SIEP, SIC and/or any company affiliated to these companies that may issue DEPs or require the use of DEPs. Without prejudice to any specific terms in respect of confidentiality under relevant contractual arrangements, DEPs shall not, without the prior written consent of SIOP and SIEP, be
16、disclosed by users to any company or person whomsoever and the DEPs shall be used exclusively for the purpose for which they have been provided to the user. They shall be returned after use, including any copies which shall only be made by users with the express prior written consent of SIOP and SIE
17、P. The copyright of DEPs vests in SIOP and SIEP. Users shall arrange for DEPs to be held in safe custody and SIOP or SIEP may at any time require information satisfactory to them in order to ascertain how users implement this requirement. All administrative queries should be directed to the DEP Admi
18、nistrator in SIOP. NOTE: In addition to DEP publications there are Standard Specifications and Draft DEPs for Development (DDDs). DDDs generally introduce new procedures or techniques that will probably need updating as further experience develops during their use. The above requirements for distrib
19、ution and use of DEPs are also applicable to Standard Specifications and DDDs. Standard Specifications and DDDs will gradually be replaced by DEPs. DEP 32.32.00.11-Gen. November 1993 Page 2 PDF created with pdfFactory Pro trial version TABLE OF CONTENTS 1.INTRODUCTION .5 1.1SCOPE 5 1.2DISTRIBUTION,
20、 INTENDED USE AND REGULATORY CONSIDERATIONS5 1.3DEFINITIONS 5 1.4ABBREVIATIONS 5 1.5CROSS-REFERENCES 6 1.6ORDER OF PRECEDENCE 6 2.MANUFACTURERS RESPONSIBILITY 7 3.METERING SYSTEM DESIGN .8 3.1GENERAL8 3.2INLET HEADER.8 3.3METERING RUN.8 3.4METER PROVER 8 3.5MICROCOMPUTER BASED MONITORING AND CONTROL
21、 SYSTEM 9 3.6UTILITIES 10 4.TECHNICAL REQUIREMENTS - FIELD MOUNTED COMPONENTS . 11 4.1SKID, STRUCTURAL AND BASEPLATE 11 4.2PIPING AND VALVES .11 4.3INSTRUMENT AND ELECTRICAL12 4.4TURBINE METERS .12 4.5STRAINERS 13 4.6FLOW STRAIGHTENERS .13 4.7FLOW CONTROL VALVES .13 4.8TEMPERATURE MEASUREMENT .13 4.
22、9PRESSURE MEASUREMENT 13 4.10DENSITY MEASUREMENT 14 4.11BS however, narrower spans shall be applied where operating temperature stability permits. The RTDs shall be mounted in flanged thermowells to enable replacement without depressuring or draining the system. A test thermowell shall be installed
23、adjacent to the RTDs to allow a temperature check during commissioning and at periodic meter station inspections. The two thermowells shall be installed on different radial axes to minimise vibration fatigue of the downstream well by vortex shedding from its upstream partner. Thermowells shall be pr
24、ovided for all temperature applications, in accordance with (4.2). Test thermowells shall be provided with bores suitable for the insertion of mercury-in-glass high accuracy thermometers. The Manufacturer shall provide two mercury-in-glass precision thermometers for calibration check purposes. Therm
25、ometers shall be certified with an accuracy better than 0.1 C. 4.9PRESSURE MEASUREMENT Pressure and differential pressure transmitters should be of the “Smart“ type with an analogue 4-20 mA output signal. They shall be in accordance with DEP 32.31.00.32-Gen. Digital signal transmission based on prop
26、rietary communication protocols should not be used as equipment from different Manufacturers may not be able to be mixed/interchanged. Application of digital communication requires the written agreement of the Principal. Local pressure gauges shall be of the Bourdon tube type with a 100 mm minimum d
27、iameter, in accordance with MESC No. 60.35/001. DEP 32.32.00.11-Gen. November 1993 Page 13 PDF created with pdfFactory Pro trial version 4.10DENSITY MEASUREMENT The Manufacturer shall provide a dual parallel densitometer system. The signal of both transducers shall be compared for transducer health
28、 monitoring. A deviation of 0.5- 1.0 kg/m3(this value shall be specified by the Principal) between the two measurements shall initiate an alarm. A representative slip stream shall be taken from and returned to the metering station header through the two vibrating tube type density transducers. The p
29、hysicalinstallationand calibration verificationrequirements are detailed in IP Petroleum Measurement Manual, Part VII, Section 2. 4.11BS -prover pressure; -prover inlet and meter run outlet isolation valve seal status; -proving flow rate. The selection of a meter for proving shall set up an automati
30、c sequence of valve control procedures. Valve seal integrity shall be monitored throughout. If the first 5 consecutive meter proving runs are not within the required accuracy, an alarm should be raised to alert the operator. Should the meter fail to achieve the required performance after 10 consecut
31、ive meter proving runs, the proving sequence shall be aborted. The system should then wait for an operator command on whether or not to resume the next proving run in the queue. All calculations and reports shall be generated in DEP 32.32.00.11-Gen. November 1993 Page 17 PDF created with pdfFactory
32、Pro trial version the usual way for aborted runs, but they shall be annotated to indicate a failed prover run. Should any of the prover monitored parameters exceed pre-determined limits, then the proving run shall be automatically aborted, an alarm generated and the calculation discarded. On comple
33、tion of a proving sequence, the revised meter factor shall be displayed. Provided that it is satisfactory, the new meter calibration factor shall then be downloaded to the relevant line microcomputer, automatically initiated by a command from the operator. It shall be possible to perform this functi
34、on manually if required. Should preset limits of the meter calibration factor be exceeded then an alarm shall be initiated. The prover microcomputer shall be provided with a resettable high speed totaliser, with a minimum of eight digits, for the accumulation of meter pulses. Resolution shall be 1 p
35、ulse. The following inputs shall be provided: -position detector switch signals; -inlet and outlet temperature; -prover pressure; -prover four-way diverter valve position status; -valve seal status on prover inlet and meter run outlet isolation valves; -serial data link from stream and station micro
36、computers; -unscaled meter pulses from each individual stream meter via the stream microcomputer. The following outputs shall be provided: -serial data link to station and stream microcomputer; -stream control valve; -inlet temperature; -outlet temperature; -prover pressure. DEP 32.32.00.11-Gen. Nov
37、ember 1993 Page 18 PDF created with pdfFactory Pro trial version 6.INSPECTION AND TESTING 6.1GENERAL In addition to the provision for testing and inspection stated in the terms and conditions of purchase, the Manufacturer shall give the Principal adequate notice of his intention to carry out tests
38、so that arrangements can be made to witness the event. The appropriate authority may wish to approve the equipment design and witness calibration tests. This requirement will be stated in the Requisition. In the purchase order the Principal shall indicate whether or not he wishes to perform inspecti
39、on during fabrication. If so, the Principal shall indicate the scope of his inspection, which typically may include: -To ensure dimensional compliance with the flow metering design. -To ensure that the performance of instrumentation meets specification accuracy. -To ensure that the computing system
40、fulfils the functional performance requirements, including immunity from external interference sources. -To ensure that the basic skid and piping fabrication meets structural and piping code requirements. -To ensure that the electrical/electronic installationcomplies with electrical safety requireme
41、nts and that components to be used in hazardous areas have recognised certification. 6.2INSPECTION FOR COMPLIANCE WITH METERING DESIGN Metering tubes shall be inspected before incorporation into the pipework fabrication to ensure compliance with the requirements of ISO 2715, in particular the dimens
42、ions of the upstream flow conditioning section and of the downstream section, including the locations of the thermowells and pressure tappings. The turbine meter Manufacturer shall be required to provide a calibration certificate for each meter. Where possible, the calibration fluid should have a si
43、milar viscosity to the specified operating liquid. Where this cannot be achieved calibration using water, together with the Manufacturers prediction of performance on the operating liquid, shall be performed. The meter prover shall be calibrated at the Manufacturers premises by an independent calibr
44、ation company. The calibration should be witnessed by the appropriate authority and recorded on a formal certificate. The instruments detailed in (4.4, 4.7, 4.8, 4.9, 4.10 and 4.11) shall be inspected and tested in accordance with DEP 62.10.09.11-Gen. 6.3INSPECTION AND TESTING ON SKID STRUCTURAL AND
45、 PIPING SYSTEMS All materials used in fabricating the process pressure retaining system, e.g. pipework, valves, fittings, etc., shall have relevant mill certificates, casting melt certificates, etc., in accordance with the applicable MESC specification. Prior to commencement of fabrication, the weld
46、er(s) for the process piping fabrication shall be certified to the requirement of the piping design specification. During fabrication, welds shall be inspected as defined in DEP 31.38.01.31-Gen. Records shall be kept and witnessed as appropriate. Hydrostatic pressure tests shall be performed in acco
47、rdance with ANSI/ASME B31.3 and DEP 31.38.01.31-Gen. Specifically, the entire pipework system shall be maintained at maximum rated pressure, for the recommended time, following removal of turbine meters and replacement by pipe spools. A certified chart record of temperature and pressure shall be pro
48、duced covering the duration of the test. DEP 32.32.00.11-Gen. November 1993 Page 19 PDF created with pdfFactory Pro trial version All flanges and swing elbows shall be capable of being opened without pipe spring or malfunction. The Principal may require the Manufacturer to open joints for spot chec
49、ks. 6.4INSPECTION FOR ELECTRICAL SAFETY Safety documentation for the selected type of protection for the installed electrical instruments shall be compiled for scrutiny and to ensure that any certificate conditional requirements have been incorporated in the installation. All wiring shall be tested for insulation resistance, earth fault and earth continuity. To prevent damage to low voltage equipment, the instrument equipment shall be disconnected at both ends of the cable before t