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Requisitos Técnicos para Desenho Mecânico e Diseno Detalhado de Tubos: Sintese, Esquemas de Química

Terminos e definições aplicáveis a um technical specification de design mecânico e detalhado de tubos. Os termos 'design mecânico' e 'design detalhado de tubos' são considerados sinônimos. Os tubos ou equipamentos que ocupam o espaço físico definido pela 319.4.4 e possuem uma carga superior a 0,8sa (como definido em para. 302.3.5) podem causar rugas em materiais por meios mecanismos abordados neste documento. As linhas classificadas como críticas de acordo com i-et-3010.00-1200-200-p4x-002 devem ser destacadas. Os materiais das folhas de projetos de tubos preparadas pelo desenhista devem ser aqueles incluídos em iso, astm, etc. As espessuras de tubos ou acessórios não cobertas ou não definidas pelas padrões de materialização de iet-3010.1m-1200-200-p4x-001 devem ser calculadas de acordo com asme. A disposição dos tubos deve ser a mais econômica em relação às necessidades de processo, montagem, operação, segurança e manutenção.

Tipologia: Esquemas

2023

Compartilhado em 11/01/2024

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Baixe Requisitos Técnicos para Desenho Mecânico e Diseno Detalhado de Tubos: Sintese e outras Esquemas em PDF para Química, somente na Docsity! TECHNICAL SPECIFICATION Nº: I-ET-3010.00-1200-200-P4X-001 CLIENT: SHEET: 1 of 24 PROGRAM: AREA: SRGE Title: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP MICROSOFT WORD / V. 2016 / I-ET-3010.00-1200-200-P4X-001_C.DOCX INDEX OF REVISONS REV. DESCRIPTION AND/OR REVISED SHEETS 0 A B C ORIGINAL ISSUE ITEM 6.1.33 REVISED. ANNEX A INCLUDED. ITEM 4.4.1 REVISED ACCORDING CLARIFICATION NOTICE DUE TO BIDDERS QUESTIONS. ITEMS 4.2.4 AND 5.2.5 REVISED ACCORDING CLARIFICATION NOTICE DUE TO BIDDERS QUESTIONS. REV. 0 REV. A REV. B REV. C REV. D REV. E REV. F REV. G REV. H DATE 10/06/2020 23/07/2020 02/09/2020 15/09/2020 DESIGN EEA EEA EEA EEA EXECUTION UPTP UPTP UPTP UPTP VERIFICATION CXDI CXDI CXDI CXDI APROVAL CYLA U32N U32N U32N INFORMATION IN THIS DOCUMENT IS PROPERTY OF PETROBRAS, BEING PROHIBITED OUTSIDE OF THEIR PURPOSE. FORM OWNED TO PETROBRAS N-0381 REV.L. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 2 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP SUMMARY 1 SCOPE ..........................................................................................................................................4 2 REFERENCES ..............................................................................................................................4 2.1 OWNER documents ...........................................................................................................4 2.2 Standards ............................................................................................................................5 3 TERMS AND DEFINITIONS .........................................................................................................5 3.1 Category M fluid service ....................................................................................................5 3.2 EJMA ...................................................................................................................................5 3.3 Expansion bend .................................................................................................................5 3.4 FRP / GRP ...........................................................................................................................6 3.5 High pressure fluid service ...............................................................................................6 3.6 Low temperature condition ...............................................................................................6 3.7 Mechanical design .............................................................................................................6 3.8 NPS ......................................................................................................................................6 3.9 Piping ..................................................................................................................................6 3.10 Piping system .....................................................................................................................6 3.11 Pressure rating ...................................................................................................................6 3.12 Process piping ...................................................................................................................6 3.13 PSV ......................................................................................................................................6 3.14 Severe cyclic condition .....................................................................................................6 3.15 Small bore connection (SBC) / Small bore lines .............................................................6 3.16 Sour service (H2S service) ................................................................................................7 3.17 Stress critical lines ............................................................................................................7 3.18 TSA ......................................................................................................................................7 3.19 Utility piping .......................................................................................................................7 4 GENERAL CONDITIONS .............................................................................................................7 4.1 Designer’s Responsibility .................................................................................................7 4.2 Design Conditions .............................................................................................................7 4.3 Materials ..............................................................................................................................8 4.4 Piping Identification ...........................................................................................................8 4.5 Fabrication, assembly, test and commissioning ............................................................8 5 PIPING MECHANICAL CALCULATION REQUIREMENTS ........................................................9 5.1 Calculations Included in this Technical Specification ...................................................9 5.2 Calculation of Wall Thickness ..........................................................................................9 6 GENERAL PIPING ARRANGEMENT ........................................................................................10 TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 5 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 2.2 Standards ANSI/NACE MR0175 / ISO 15156 – Petroleum, petrochemical, and natural gas industries — Materials for use in H2S-containing environments in oil and gas production API RP 551 – Process Measurement API RP 686 – Recommended Practice for Machinery Installation and Installation Design API STD 6A – Specification for Wellhead Equipment API STD 520 – Sizing, Selection, and Installation of Pressure-relieving Devices Part II-Installation ASME B16.5 – Pipe Flanges and Flanged Fittings ASME B16.47 – Large Diameter Steel Flanges ASME B16.48 – Line Blanks ASME B31.3 – Process Piping ASME B31.4 – Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids ASME B31.8 – Gas Transmission and Distribution Piping Systems ASME B36.10 – Welded and Seamless Wrought Steel Pipe ASME B36.19 – Stainless Steel Pipe EEMUA 234 – 90/10 Copper nickel alloy piping for offshore applications Specification ISO 21457 – Materials selection and corrosion control for oil and gas production systems NR-13 – CALDEIRAS, VASOS DE PRESSÃO, TUBULAÇÕES E TANQUES METÁLICOS DE ARMAZENAMENTO STANDARDS OF THE EXPANSION JOINT MANUFACTURERS ASSOCIATION 3 TERMS AND DEFINITIONS For the purposes of this document, the following terms and definitions are applicable. For other general technical terms see I-ET-3010.00-1200-940-P4X-002. 3.1 Category M fluid service Based on OWNER experience, sour service as defined by ANSI/NACE MR0175 / ISO 15156 shall not be considered Category M as per ASME B31.3. 3.2 EJMA Expansion Joint Manufacturer Association 3.3 Expansion bend Piping configuration designed to absorb expansion and contraction. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 6 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 3.4 FRP / GRP Fiber reinforced plastic / glass reinforced plastic. 3.5 High pressure fluid service Pressure ratings up to 10ksi shall not be considered High Pressure Fluid Service as defined in ASME B31.3. For higher pressures, OWNER approval is required. 3.6 Low temperature condition Operation or transient condition when the temperature is below 0°C. 3.7 Mechanical design A series of engineering activities and their product intended to present necessary and sufficient information for the acquisition, construction, operation and maintenance of piping systems belonging to petroleum facilities. NOTE : for the purposes of this Technical Specification, mechanical design and detailed piping design shall be considered synonyms. 3.8 NPS Nominal Pipe Size. 3.9 Piping An assembly of pipes and accessories (valves, flanges, bends, fittings, etc.) intended for transporting process or utility fluids. 3.10 Piping system An assembly of pipes used to convey fluids, interconnected to each other and/or to static or dynamic equipment, and subject to the same design conditions (temperature and pressure). 3.11 Pressure rating Maximum allowable pressure at a given temperature. 3.12 Process piping Piping interconnecting piping systems or equipment in the physical space defined by the process units, usually delimited by battery limits. 3.13 PSV Safety relief valve. 3.14 Severe cyclic condition As per ASME B31.3-2014: conditions applying to specific piping components or joints in which SE computed in accordance with para. 319.4.4 exceeds 0,8SA (as defined in para. 302.3.5), and the equivalent number of cycles (N in para. 302.3.5) exceeds 7000; or other conditions that the designer determines will produce an equivalent effect. 3.15 Small bore connection (SBC) / Small bore lines Connections or lines having a nominal diameter equal to or smaller than NPS 1 1/2. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 7 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 3.16 Sour service (H2S service) Service with fluid that contains sufficient H2S to cause cracking of materials by the mechanisms addressed by ANSI/NACE MR0175 / ISO 15156. 3.17 Stress critical lines Lines defined as critical according to I-ET-3010.00-1200-200-P4X-002. 3.18 TSA Thermal spray aluminum. 3.19 Utility piping Piping carrying auxiliary fluids required for processing, storage and general services. 4 GENERAL CONDITIONS 4.1 Designer’s Responsibility 4.1.1 The designer is responsible to assure that the engineering design of piping complies with the requirements of this this Technical Specification, applicable codes and standards, Classification Society Rules and legal conditions. 4.1.2 In case it is necessary to create or revise piping specsheets issued by OWNER, Designer shall submit them for OWNER review and approval. Once approved, CONTRACTOR shall issue a Technical Specification containing all piping specsheets used in de Project, for hull or for topside as applicable. This new Technical Specification will replace the original one. Modifications in relation to the previous specification shall be highlighted. 4.2 Design Conditions 4.2.1 Topsides and hull piping shall be designed according to ASME B31.3. Piping design shall also comply with NR-13 and Classification Society Rules. 4.2.2 Piggable lines shall comply with ASME B31.4 and/or B31.8 as applicable. Pig traps and piggable lines shall also comply with I-ET-3010.00-1200-295-P4X-001. 4.2.3 For fatigue assessment and requirements applicable to stress critical lines I-ET-3010.00-1200-200-P4X- 002 shall be complied with. 4.2.4 Unit shall be designed for an uninterrupted period of 30 years without dry-docking for maintenance. 4.2.5 Localized temperature reduction caused by flange leakage does not need to be considered as minimum design temperature. 4.2.6 The use of ASME Code Cases is subjected to OWNER previous approval. 4.2.7 Piping shall be designed to avoid categorization into severe cyclic service. [RECOMMENDED PRACTICE] 4.2.8 Design, construction and assembly of FRG piping shall comply with I-ET-3010.00-1200-200-P4X-003. 4.2.9 Design, construction and assembly Hull piping shall also comply with I-ET-3010.1M-1350-200-P4X-001. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 10 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP Table 1 - Minimum Structural Piping Wall Thicknesses NPS SERVICE Carbon and low alloy steel Alloys and Stainless steels ½ to 1 ½ Utilities, sea water and produced water SCH 80 SCH 40S ½ to 1 ½ Hydrocarbon SCH 160 SCH 40S 2 to 6 All SCH 40 SCH 40S 8 to 10 All 0,25” SCH 40S 12 to 24 All 0,25” SCH 40S 26 to 30 All 0,312” 0,375” 32 to 44 All 0,375” 0,375” 6 GENERAL PIPING ARRANGEMENT 6.1.1 The piping layout shall be the most economical as far as process, assembly, operation, safety, and maintenance needs are concerned. 6.1.2 The pipe rack shall have at least 10% space for future expansion. 6.1.3 The minimum height above the floor for piping shall be at least 300 mm, measured from the outside bottom of the pipe, except for small diameter lines. This height shall always be increased, when necessary, for the installation of accessories on the bottom part of the pipes such as, for example, legs for collecting condensate and drains with valves. 6.1.4 Piping shall form parallel groups, with the same elevation of the outside bottom of pipe (bottom elevation). Whenever possible, these parallel groups shall have an orthogonal design direction (North- South or East-West), or vertical direction. Piping operating at high temperatures shall be placed externally to the group of parallel pipes and at the highest point of the pipe rack in order to facilitate the placement of expansion bends. Heavier pipes shall be located at the lowest elevation of the pipe rack and closer to the pipe rack columns. Groups of parallel horizontal pipes shall have different elevations for different directions. Piping branching off to various units or to equipment on one side or the other of a central pipe rack shall preferably be located at the center of the pipe rack. For economic reasons, large diameter pipes or those made of special materials may be dealt with differently from the ones described above 6.1.5 Within processing areas, the interconnection between different modules shall be restricted to the pipe racks. The pipe rack’s walkways, maintenance routes and escape routes shall be clear of piping. Pipe sections close to the floor level are permitted, provided they do not obstruct the equipment handling way and escape routes. Due to process or economic reasons, properly supported piping installed at high points directly interconnecting equipment is permitted. 6.1.6 Pipes on elevated pipe racks shall be arranged in such a way that the small diameters lines lie between 2 large diameter lines, allowing the former to rest on the latter, thereby reducing the need for intermediate supports. 6.1.7 All elevated piping shall be designed in such a manner not to obstruct access for people. Piping shall not rest on platforms or walkways. 6.1.8 The spacing between parallel pipes shall be at least the values given in NOTE 1: dimensions in mm. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 11 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP NOTE 2: movements due to thermal expansion shall be calculated for each piping. NOTE 3: use Option 1 for removal of gas/steam and Option 2 for liquids. 6.1.9 Figure 1. For crossings at 45°, see Figure 2. In both cases, the displacements that may occur on piping due to thermal expansion shall be considered. NOTE 1: dimensions in mm. NOTE 2: movements due to thermal expansion shall be calculated for each piping. NOTE 3: use Option 1 for removal of gas/steam and Option 2 for liquids. Figure 1 - Spacing between Parallel Tubes 6.1.10 When routing the piping, special attention shall be paid to those cases where certain conditions are required by the process, such as slope, absence of high points, and minimum head loss. 6.1.11 The trim of the vessel (ship) shall be taken into account when routing piping with slope. 6.1.12 All piping shall be arranged in such a manner as to allow fast and safe access to equipment, valves, sample connections and instruments, for maintenance as well as operation. Piping and supports shall be located in such a way as to allow all removable parts to be easily dismantled and removed. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 12 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 6.1.13 Whenever possible, all discharge nozzles of pump assemblies shall be aligned. NOTE 1: the minimum allowable clearance is 50 mm between tubes. If a larger clearance is required, the distances A, B, C and D shall be increased. NOTE 2: E1 and E2 are the thermal insulation thicknesses. NOTE 3: dimensions in mm. Figure 2 - Minimum Distances for Crossings at 45° 6.1.14 Expansion loops shall be placed at a point above the piping level (spatial), except when this is not allowed for process reasons (piping with a constant slope, two-phase flow, and some pump suction lines). Expansion loops in the vertical plane shall be avoided. 6.1.15 Following branches shall be installed on top of main line: a) Branches connected to PSV discharge lines; b) Branches for chemical injection; c) Branches for utilities containing gaseous fluid; d) Branches of deluge system. 6.1.16 Branches for utilities with liquid fluid, from header to customer, shall be installed on bottom of main line, except for tank cleaning lines. 6.1.17 Changes in direction shall meet the requirements set forth in 6.1.17.1 to 6.1.17.3. 6.1.17.1 Changes in pipe direction shall be made using bends, elbows, tees, crosses or by bending the pipe itself. The use of flanged tees shall be minimized. 6.1.17.2 Miter bends are not allowed. 6.1.17.3 In all of the above cases, when the bend does not have a long radius, the drawings shall indicate which bend was used. 6.1.18 Short radius elbows shall not be used for piping subject to multiphase flow. 6.1.19 The use of flanges shall be minimized and shall be usually allowed only for connecting valves, pressure vessels, tanks, pumps or other equipment. Pipes that need to be frequently disassembled for cleanup or inspection and those having an internal lining may be flanged. 6.1.20 Insulated piping systems shall be designed with sufficient space around inline valves, equipment, flanges, etc. to allow for installation of insulation boxes. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 15 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP Figure 4 – Typical arrangements (sketch) of pump suction lines TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 16 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 7.2.5 Routing of suction piping shall be as short and direct as possible, without high or low points, and taking into consideration the thermal flexibility required for the lines. 7.2.6 Installation of valves close to pumps shall comply with the following criteria: a) pumps with flooded suction or parallel pumps suctioning from the same header line: mandatory installation of a block valve close to the suction nozzle of each pump; this valve is not recommended for pumps with non-flooded suction, and that are not in parallel with other pumps; b) pumps with non-flooded suction: mandatory installation of a check valve (foot valve) at the free end of the suction line, sufficiently immersed in the liquid of the suction tank; c) discharge piping (in all cases): mandatory installation of a block valve close to the discharge nozzle of each pump; d) pumps discharging to a higher static level or parallel pumps discharging to the same header line: installation of a check valve close to the discharge nozzle of each pump, in addition to the block valve in enumeration c). Non-slam check valves shall be used for pumps with greater than 185 kilowatt (250 horsepower) nominal driver rating or NPS 12 or greater piping. 7.2.7 Special care shall be taken with respect to piping connected to reciprocating pumps, in order to avoid undesirable vibrations in the systems. 7.2.8 When the diameter of the pump nozzle is smaller than the piping connected to the nozzle, Table 2 should be used for the sizing of valves close to the pump. [Recommended Practice] Table 2 - Valve Sizing Nozzle Nominal nozzle diameter Minimum Nominal valve diameter Suction One diameter smaller than the piping Same diameter as the piping 2 or more nominal diameters smaller than the piping One diameter smaller than the piping Discharge Smaller than the piping One nominal diameter larger than the nozzle 7.2.9 When the diameter of the suction piping is larger than the pump intake nozzle, the reduction placed adjacent to the pump shall be in accordance with Figure 4. 7.2.10 Branches for two or more pumps operating in parallel, suctioning from the same header line, as well as for double suction centrifugal pumps, shall be as symmetrical as possible, with the same head loss, to prevent preferential flow through a branch. 7.2.11 Positive displacement pumps shall be provided with a bypass and a vent valve at the discharge with the same pump flow capacity. 7.2.12 Discharge piping of dosing pumps shall meet the requirements stipulated by the pump manufacturer. 7.3 Diesel Engines 7.3.1 Piping shall not be run directly over diesel engines, exhaust piping or any position where leaking fuel oil can impinge onto hot parts. 7.4 Piping Connected to Turbines 7.4.1 The same requirements and recommendations of 7.2.1 and 7.2.3 are applicable. 7.4.2 When two or more turbines share a control valve, block valves shall be provided at the intake nozzle of each turbine. Block valves shall also be provided at the discharge of each turbine. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 17 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 7.5 Piping Connected to Vessels 7.5.1 Piping shall be arranged in such a manner as not to obstruct access for operation, maintenance and tests. All manhole covers as well as other removable parts of the vessels shall be left completely unobstructed. 7.5.2 Manway hinges/davits shall be oriented such that the cover opens away from ladders/stairs and instrument access. 7.5.3 Piping shall run at least 300 mm away from external surface of pressure vessels or its external insulation. 7.5.4 For vertical vessels, nozzles connected to piping and instruments shall be grouped together preferably in one or two sectors properly chosen on the vessel shell. 7.5.5 All valves shall be accessible for operation from the floor or platform. 7.5.6 Forces imposed by piping on vessel nozzles (due to thermal expansion, weights etc.) cannot cause stresses larger than those stresses allowed by I-ET-3010.00-1200-540-P4X-001. Nozzle displacements due to thermal expansion of the vessels shall be considered. 7.6 Piping Connected to Heat Exchangers 7.6.1 Forces imposed by piping on heat exchangers nozzles (due to thermal expansion, weights etc.) cannot cause stresses larger than those allowed on the nozzles shown in I-ET-3010.00-1200-540-P4X-001 I- ET-3010.1M-1200-451-P4X-001, I-ET-3010.1M-1200-456-P4X-001 and I-ET-3010.1M-1200-459-P4X- 001, as applicable. Nozzle displacements due to thermal expansion of the heat exchangers shall be considered. 7.6.2 Piping shall be arranged so as to allow removal of tube bundles, channel and shell covers without disassembly of piping. It means there shall be no piping in the area in front of the channel cover, within the space needed for tube bundle removal. There shall also be sufficient space left in the entire perimeter of equipment to allow bolts to be dismounted. If required, include a pair of flanges in piping connected to the top nozzle of the channel so as to facilitate the dismantling and enable the removal of the channel during maintenance shutdowns. 7.6.3 Provision shall be made in the piping design for an area for cleaning operations, with water taps, electrical outlets, access to machines, and lighting. 7.6.4 Cooling water piping connected to heat exchangers shall be arranged in such a way as to prevent water from being drained by the outlet piping in the event of a feed failure. 7.6.5 The arrangement shall provide for blocking (even in series) and bypass piping whenever heat exchangers are subject to individual in-service maintenance. 7.6.6 In the case of heat exchangers stacked one on top of the other, blanks shall be provided in order to allow individual hydrostatic testing of the equipment. 7.7 Piping Connected to Compressors 7.7.1 The arrangement of compressor piping shall facilitate dismantling of the housing and removal of inside parts. 7.7.2 Low points in suction lines shall be avoided, and piping shall be as straight as possible so as to avoid surge and head loss problems. Whenever necessary, provision shall be made for removal of accumulated condensate and dirt. Suction lines shall preferably have an upward flow. Air intakes for air compressor shall be located away from windows, steel stacks, vents, or any other source of air contamination, and shall not be positioned at a point that restricts suction. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 20 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 9 EXPANSION JOINTS 9.1.1 The use of expansion joints shall be avoided whenever possible, and a route with changes in direction in the plane or in space is preferred, so that the piping has its own flexibility and does not cause loads or stresses greater than allowable values on equipment. 9.1.2 When expansion joints are used, the system shall be properly supported, anchored, and guided in a manner to ensure joints will not be subjected to the weight of piping or any forces or stresses greater than allowable values. 9.1.3 All expansion joints (except swivel joints) shall be obligatorily placed between two anchor points or axial stops, and between those points there can only be one expansion joint. 9.1.4 All expansion joints shall be supplied flanged (spool type). 9.1.5 All expansion joints shall have tie rods designed to resist hydrostatic test thrust force. 9.1.6 Piping arrangement and supports shall comply with EJMA or MANUFACTURER requirements. 9.1.7 Shipping devices, which shall be removed after installation, shall be painted yellow. 9.1.8 Expansion joints shall be located in accessible areas, in order to allow inspection and maintenance. 10 PIPING SUPPORTS 10.1.1 Piping supports shall comply with I-ET-3010.00-1200-200-P4X-004. 10.1.2 When there is possibility of removing items to provide calibration, maintenance or commissioning (e.g. PSVs, in-line instruments, strainer spools, channels, etc.) the supports shall be installed in such a way that the line is still properly supported after the item is removed. Supports installed on removable items shall be avoided. 11 VENTS, DRAINS, INSTRUMENT CONNECTIONS AND SMALL BORE BRANCHES 11.1.1 The installation of vents at all high points and drains at all low points is mandatory for any piping, if those showed on the P&IDs are not sufficient/suitable. 11.1.2 Drainage system shall comply with requirements of I-RL-3010.1M-1200-940-P4X-003. 11.1.3 Drains, vents and instrument connections arrangement shall be according Annex C of I-ET-3010.1M- 1200-200-P4X-001 and of I-ET-3010.1M-1200-200-P4X-002. Support weld to piping shall comply with I-ET-3010.00-1200-200-P4X-004. 11.1.4 Brace/clamp supports should be installed preferably rather than using welded supports. Exception made for lines connected to reciprocating compressor or to overboard control valves, where welded braces shall be used. 11.1.5 Small bore connections in lines with multiphase flow or subjected to vibration (such as: lines connected to reciprocating compressor or in high-pressure water injection system) shall use sweepolet or insert weldolet connection rather than sockolet. 11.1.5.1 These branches shall be supported in two planes, connected between the small-bore pipework and the main pipe. Under no circumstances may these connections be braced from local structure such as steelwork, decks or bulkheads. 11.1.5.2 Supports shall have sufficiently stiffness. The support should be at least as stiff as the connection to be of any effect. TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 21 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP 11.1.5.3 Design of support weld shall consider fatigue strength. 11.1.5.4 Any fastenings used should be designed to be effective under vibration (e.g. bolted clamps include anti-vibration washers/lock nuts). 11.1.5.5 For examples of small-bore connection configurations and supports see T5 and T11 from Guidelines for the Avoidance of Vibration Induced Fatigue Failure in Process Pipework. [RECOMMENDED PRACTICE] 12 ADDITIONAL REQUIREMENTS FOR DESIGN PRESENTATION The design deliverables are those defined in the contract. The purpose of this section is to present additional requirements applicable to the content of some documents. 12.1 Line List 12.1.1 The line list shall include the following data (extracted from 3D model): a) The fluid class according to NR-13. In order to facilitate the identification of lines applicable to NR-13, fluid classes shall be grouped as A/B or C/D; b) The inspection class (I to III) according to I-ET-3010.00-1200-955-P4X-002; c) The external coating code (N/A = not applicable; the paint scheme number according to I-ET-3010.00- 1200-956-P4X-002; or TSA); d) The fluid service or condition according to ASME B31.3 (D = category D; ET = elevated temperature; HP = high pressure; M = category M; N = normal; SC = severe cyclic condition). 12.2 Isometrics 12.2.1 Each isometric drawing shall contain only one entire line. 12.2.2 Before starting the execution of isometrics, a typical isometric shall be submitted to OWNER, for comments. 12.2.3 All supports (welded or not) shall be indicated in the isometric with the respective tag. 12.2.4 The isometric shall include following data (extracted from 3D model), as minimum: a) The inspection class (I to III) according to I-ET-3010.00-1200-955-P4X-002; b) The external coating code (N/A = not applicable; the paint scheme number according to I-ET-3010.00- 1200-956-P4X-002; or TSA); c) The identification code of pipe material and fittings (see Annex B of I-ET-3010.1M-1200-200-P4X-001 and I-ET-3010.1M-1200-200-P4X-002); d) Valve tag (same shown in P&ID) and valve code (from piping specsheet). 12.2.5 Isometrics shall contain additional information on basic quantitative items, such as weight and area, required for general thermal insulation, painting and coating services. 12.3 Specifications of Unlisted Components 12.3.1 It shall be issued data sheets, drawings and specifications of all piping components and sub- components that do not fully comply with a standard. 12.3.2 Examples of unlisted components are (not limited to): a) Flanges (including its gasket or seal joint) beyond the scope of ASME B16.5, ISO 27509 or API 6A; TECHNICAL SPECIFICATION Nº I-ET-3010.00-1200-200-P4X-001 REV. C SHEET 22 of 24 TITLE: MINIMUM REQUIREMENTS FOR PIPING MECHANICAL DESIGN AND LAYOUT NP-1 ESUP b) Valves beyond the scope of ASME B16.34, API 6D, API 6A or other applicable standard; c) Non-symmetrical piggable "Y" connections. 13 RECOMMENDED STANDARDS [RECOMMEDED PRACTICE] API RP 14E - Recommended Practice for Design and Installation of Offshore Production Platform Piping Systems. Energy Institute - Guidelines for the Avoidance of Vibration Induced Fatigue Failure in Process Pipework, items T5, T11 and T13. ISO 13703 - Petroleum and natural gas industries - Design and installation of piping systems on offshore production platforms. NORSOK L-002 - PIPING DESIGN, LAYOUT AND STRESS ANALYSIS.