GS114 4HVACfilterforoffshore

GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE September 1993 Copyright © The British Petroleum Company p.l.c Copyright © The British Petroleum Company p.l.c All rights reserved The information contained in this document is subject to the terms and conditions of the agreement or contract under which the document was supplied to the recipient's organisation None of the information contained in this document shall be disclosed outside the recipient's own organisation without the prior written permission of Manager, Standards, BP International Limited, unless the terms of such agreement or contract expressly allow BP GROUP RECOMMENDED PRACTICES AND SPECIFICATIONS FOR ENGINEERING Issue Date Doc No GS 114-4 September 1993 Latest Amendment Date Document Title HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE APPLICABILITY - Does not preclude adaptaption for other applications Regional Applicability: United Kingsom SCOPE AND PURPOSE This document specifies the general requirements for the design and construction for HVAC Air Filters and Separators for use offshore Its purpose is for the specification of fit-for-purpose HVAC Air Filters and Separators at minimum cost AMENDMENTS Amd Date Page(s) Description _ CUSTODIAN (See Quarterly Status List for Contact) Mechanical Systems Issued by:- Engineering Practices Group, BP International Limited, Research & Engineering Centre Chertsey Road, Sunbury-on-Thames, Middlesex, TW16 7LN, UNITED KINGDOM Tel: +44 1932 76 4067 Fax: +44 1932 76 4077 Telex: 296041 CONTENTS Section Page FOREWORD ii INTRODUCTION 1.1 Scope 1.2 Quality Assurance GENERAL 2.1 Documentation 2.2 Exceptions 2.3 Conflicts STANDARD DESIGN REQUIREMENTS 3.1 Design 3.2 General Construction APPENDIX A DEFINITIONS AND ABBREVIATIONS APPENDIX B LIST OF REFERENCED DOCUMENTS APPENDIX C DATA SHEET GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE i FOREWORD Introduction to BP Group Recommended Practices and Specifications for Engineering The Introductory Volume contains a series of documents that provide an introduction to the BP Group Recommended Practices and Specifications for Engineering (RPSEs) In particular, the 'General Foreword' sets out the philosophy of the RPSEs Other documents in the Introductory Volume provide general guidance on using the RPSEs and background information to Engineering Standards in BP There are also recommendations for specific definitions and requirements Value of this Guidance for Specification This Guidance for Specification was developed under the BP Exploration XEU Simple Specifications Initiative This initiative is intended to simplify the purchasing requirements through a minimum conditions of satisfaction approach in regions where there is a mature supplier resource Application This Guidance for Specification is intended to guide the purchaser in the use or creation of a fit-for-purpose specification for enquiry or purchasing activity Text in italics is Commentary Commentary provides background information which supports the requirements of the Specification, and may discuss alternative options This document may refer to certain local, national or international regulations but the responsible to ensure compliance with legislation and any other statutory requirements lies with the user The user should adapt or supplement this document to ensure compliance for the specific application Specification Ready for Application A Specification (BP Spec 114-4) is available which may be suitable for enquiry or purchasing without modification It is derived from this BP Group Guidance for Specification by retaining the technical body unaltered but omitting all commentary, omitting the data page and inserting a modified Foreword Feedback and Further Information Users are invited to feed back any comments and to detail experiences in the application of BP RPSE's to assist in the process of their continuous improvement For feedback and further information, please contact Standards Group, BP International or the Custodian See Quarterly Status List for contacts GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE ii INTRODUCTION 1.1 Scope This document specifies the requirements for HVAC Air Filters and Separators for use on hydrocarbon production, processing and export facilities offshore The Vendor's scope shall include the following:Air Filters and Separators complete with casing, frame, slide rails, access doors, drain connections, two sets of filter media, pressure gauges and remote monitoring tappings as indicated on the Data Sheets Provision of Documentation:(a) (b) 1.2 General Arrangements Wiring and Termination Diagrams Quality Assurance Verification of the vendor's quality system is normally part of the pre-qualification procedure, and is therefore not specified in the core text of this specification If this is not the case, clauses should be inserted to require the vendor to operate and be prepared to demonstrate the quality system to the purchaser The quality system should ensure that the technical and QA requirements specified in the enquiry and purchase documents are applied to all materials, equipment and services provided by sub-contractors and to any free issue materials Further suggestions may be found in the BP Group RPSEs Introductory Volume GENERAL 2.1 Documentation 2.1.1 This Specification shall be read in conjunction with an enquiry or purchase order and the accompanying data sheets 2.2 Exceptions 2.2.1 Tenders for the supply of Air Filters and Separator shall include either an unqualified affirmation regarding compliance with the specification or a complete list of detailed exceptions 2.2.2 A Vendor may offer alternative suitable proposals where price, delivery or technical advantage may accrue, but such proposals shall be in addition to the main bid/tender GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE 2.3 Conflicts 2.3.1 If any of the reference documents conflict, and definition is not established by the provisions of Section of this Specification, then the Vendor or his sub-supplier shall bring this to the attention of the Purchaser STANDARD DESIGN REQUIREMENTS 3.1 Design 3.1.1 Air inlet filters shall remove suspended salt aerosols, dust particles and moisture i.e., drifting rain, snow, mist/fog, sea-water droplets, cement dust, sand blasting dust, burnt hydrocarbons etc 3.1.2 The filtration arrangements shall be located within air handling units and, unless otherwise stated on the Data Sheets, it should be assumed that the airflow shall be horizontal 3.1.3 The air handling units shall be fitted with either primary or primary/secondary filtration arrangements; refer to the Data Sheets for details 3.1.4 Primary filtration shall be completed by either disposable coalescer pads or a combination of filter coalescer media with downstream vane inertia separators 3.1.5 Secondary filtration shall be completed using a dry fabric high efficiency cartridge 3.1.6 The design and arrestance capability of the filters shall be based around a salt particulate mass size distribution peak of microns The Vendor should provide performance characteristics for the to 30 microns range 3.1.7 Filtration media should be either disposable or washable; refer to data sheets for details 3.1.8 Under all weather conditions the primary filtration unit shall reduce contaminants above microns at an efficiency in excess of 99% whilst maintaining an air salt concentration below 0.05 ppm kg weight Efficiency shall be maintained during periods of low humidity 3.1.9 The design shall ensure that any coalesced moisture cannot be reentrained into the air stream GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE 3.1.10 Self draining facilities, to withstand washdown without overflow and back flooding shall be incorporated 3.1.11 Average air velocities through the filtration media shall be within the selected filter optimum range such that separation, arrestance and holding capacities are not compromised and associated clean and dirty pressure drops are optimised 3.1.12 Vertical blade type inertia vane separators of at least passes shall be used They should be selected to optimise the velocity and pressure drop to ensure an efficiency of 99% without re-entrainment 3.1.13 Secondary filtration shall have high arresting and dust holding capacities, particularly in the to micron range of salt components, attaining an arrestance of 99% of salt particles down to 1.5 microns 3.1.14 Filter dust spot efficiencies shall be greater than 95% with arresting efficiencies greater than 98% as defined in BS 6540 Part 3.2 General Construction 3.2.1 The complete assembly shall be fabricated in stainless steel to BS 1449 Part grade 316L 3.2.2 Casings shall have a minimum thickness of mm with an air tightness against internal pressure of 1500 pa 3.2.3 The filter media shall conform to BS 476 Parts and 7, i.e shall be inert, non toxic and not support mould growth 3.2.4 Gasketing, sealing and insulating materials shall conform to the above requirements 3.2.5 The filter media shall not migrate into the airstream and should be treated to ensure it is not water retaining 3.2.6 The filter media shall be mounted on a substantial frame, with individual holding sub frames, the design of which shall permit changeout from the preferred face or side Where side access is required the frame shall be provided with slide rails to facilitate replacement 3.2.7 The secondary filtration arrangements shall generally be in line with the primary filtration arrangements with the exception of drainage and separator facilities which are not required GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE 3.2.8 Where the primary filtration unit is housed in the air handling units, then it shall form an integral part of the unit; and access, drain and pressure measuring requirements shall be transferred to the unit casing The frame and separator shall be held rigidly in place within the unit and the overall construction shall prevent flooding into other compartments 3.2.9 The internal drainage facilities shall be arranged to prevent pooling 3.2.10 Provision should be made for a 150 mm water seal on the drain; this should be terminated with a 2" ANSI-B-16.5 150 lbs RF flange 3.2.11 Access for change-out shall be as indicated on the Data Sheets 3.2.12 Sealing strips shall be completed using stainless steel 316L 3.2.13 Each filter arrangement shall be provided with magnehelic differential pressure gauges for local pressure monitoring 3.2.14 Each filter arrangement shall be provided with differential pressure tappings for remote indication; tappings should terminate at the casing with mm bulk head fittings 3.2.15 All air filters and separators shall have the Vendors standard nameplate containing the following information: Project Name PO Number Vendors serial number Year of manufacture Tag number Air Volume m3/s Filter clean resistance Pa Filter dirty resistance Pa Weight kg Air flow direction arrow 3.2.16 Lifting lugs/eyes shall be provided on the casing GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE APPENDIX A DEFINITIONS AND ABBREVIATIONS Definitions Standardised definitions may be found in the BP Group RPSEs Introductory Volume Abbreviations GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE APPENDIX B LIST OF REFERENCED DOCUMENTS A reference invokes the latest published issue or amendment unless stated otherwise Referenced standards may be replaced by equivalent standards that are internationally or otherwise recognised provided that it can be shown to the satisfaction of the purchaser's professional engineer that they meet or exceed the requirements of the referenced standards British Standards BS 476 Fire tests on building materials and structures: (Part & Part 7) BS 1449 Steel Plate Sheet and Strip: Part and BS 6540 Air Filters used in Air Conditioning and General Ventilation: Part GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE APPENDIX C DATA SHEET SPS-X-XX-XX-HV-0005 Air Filters and Separators PROJECT MODULE/AREA/LOCATION DOC REF No CONTRACTOR FLOW DRG No REV SYSTEM AND SERVICE LAYOUT DRG No REV EQUIPMENT TAG NO REV TECHNICAL DETAILS UNITS 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 m3/s m/s Pa Pa mm mm % micron % micron % RH % RH mm mm Kg Air Volume Face Velocity Pressure Drop Clean Pressure Drop Dirty Size Depth of Casing Number of Panels Number of Bags Number of Cells Primary Filtration Efficiency Primary Micron Size Secondary Filtration Efficiency Secondary Micron Humidity for above efficiencies Primary Humidity for above efficiencies Secondary Size of Trap Diameter of Drain Weight DESIGN MATERIAL CONSTRUCTION VENDOR VENDOR Frame Casing Thickness of Casing Filter Media - Primary Filter Media - Secondary Scale of Magnehelic Gauge Filter Withdrawal Drain Position mm Pa VIEWED IN DIRECTTION OF AIRFLOW N E W h W GS 114-4 HVAC - AIR FILTERS AND SEPARATORS FOR OFFSHORE USE PAGE