Electrical and Instrumentation Requirements for Simple Packa.pdf

TECHNICAL SPECIFICATION ELECTRICAL AND INSTRUMENTATION REQUIREMENTS FOR SIMPLE PACKAGED EQUIPMENT DATE: 03 APR 2003

ENGINEERING SERVICES BY KBR TECHNICAL SERVICES, INC.

IS110E BASE PAGE 1 OF 4

TABLE OF CONTENTS Section 1. 1.1 1.2 1.3 1.4 2. 3. 4.

Title Page No. GENERAL ......................................................................................................................................1 Scope..............................................................................................................................................1 Codes and Industry Standards .................. ............................ ................... .................. ................... ................... .................. ................... ................... .................. ..........1 .1 Government Regulations......... Regulations .................. ................... ................... .................. ................... ................... .................. ................... ................... ................. .................. ...........1 .1 General Requirements...... Requiremen ts....................... ................. ................................. ................ ................. ................. ................. .................. ........1 INSTRUMENT SPECIFICATIONS .................................................................................................2 ELECTRICAL REQUIREMENTS ...................................................................................................3 ADDITIONAL REQUIREMENTS ....................................................................................................4

1. GENERAL 1.1 Scope This specification defines minimum technical requirements for instrumentation and controls incorporated on simple general purpose skid package units. 1.2 Codes and Industry Standards Applicable requirements requirements in the latest edition, revision, or addendum of the following following codes, standards, and references shall be considered an integral part of this Specification. Requirements modified by this this Specification, Purchaser’s referenced drawings, or a purchase order shall take precedence over pub lished specifications. FLUID CONTROLS INSTITUTE (FCI) FCI 70-2, "Control Valve Seat Leakage" NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) NFPA 70, "National Electrical Code" (NEC) NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) NEMA ICS 6, "Industrial Control Control and Systems Systems Enclosures" UNDERWRITERS LABORATORIES (UL) UL 98, "Safety Enclosed and Dead-Front Switches" UL 198E, "Safety Class R Fuses" 1.3 Government Regulations Regulations Federal Standards and Instructions of the Occupational Safety and Health Administration (OSHA), including any requirements by state or local agencies that have jurisdiction where the equipment will be installed, shall apply. 1.4 General Requirements 1.4.1 Neither mercury nor asbestos shall be permitted. permitted. 1.4.2 Instruments and electrical components components and materials shall be listed by a recognized national national testing laboratory. 1.4.3 All pre-wired assemblies assemblies shall be UL listed or approved by a testing organization organization acceptable to the authority having jurisdiction. 1.4.4 Design, material, material, equipment, and installation installation shall meet the specified electrical electrical area classification. classification. If purging is required to meet the area classification, then Purchaser acceptance is required.




2. INSTRUMENT SPECIFICATIONS 2.1 The entire instrumentation instrumentation system shall be fully assembled and piped. 2.2 Instruments that are connected to the process shall have a 3/4 inch block and bleed bleed valve. 2.3 Instruments shall be located and installed such such that accuracy and reliability are not impaired impaired by vibration, pulsation, temperature, or contamination. contamination. Length of impulse lines connected to process pipelines or equipment equipment shall be minimized. minimized. Instruments must be accessible. 2.4 Process transmitters shall be used instead instead of process switches (e.g., level, flow, pressure temperature, etc.). Use of switches requires purchaser approval. approval. Nominal operations shall be between 30% and 70% of scale range. 2.5 Instruments in steam, liquid, liquid, liquid-sealed, or condensing service shall be located located below the process connection, and impulse tubing/piping tubing/piping shall slope continuously down to instruments. instruments. Instruments in gas or vapor service shall be located above their process connection point, and impulse tubing/piping shall slope continuously up to instrument. 2.6 Instrument support shall be designed and installed installed in such a way to avoid strain on equipment, piping connections, and instruments and shall allow for flexibility required for thermal expansion of equipment and piping. Dips and/or sags where vapor/liquid vapor/liquid can collect in piping and tubing runs shall be avoided. 2.7 Piping from level gauges and external displacer displacer type level instruments shall be self-draining self-draining into a vessel or standpipe. Displacer chambers shall have a maximum maximum allowable working pressure (MAWP) (MAWP) equal to or greater than that of the vessel. vessel. Level instrument chambers chambers shall not have cast iron bodies. Tubular glass shall not be used in process applications. 2.8 Magnetic level gauges are preferred for hazardous liquid liquid applications. Flat glass reflex type shall be used for all other applications. Pad type reflex welded-in gauge glass is acceptable acceptable for lube and hydraulic reservoir applications. 2.9 Automated valves installed installed in lines smaller smaller than 1 inch shall be line sized. Valves in line sizes sizes 1 inch and larger shall have a minimum valve body size of 1 inch inch but not less than half the pipe size. Body sizes shall not be 1-1/4 inch, 2-1/2 inch, 3-1/2 inch, or 5 inch. 2.10 Automated valve bodies or regulators shall not be cast iron, ductile iron, brass, brass, or bronze, except in water or air services in non-hazardous classified areas. 2.11 Integral flanged type globe valves are preferred preferred for modulating services. services. Rotary style valves may be considered. Seat leakage shall comply with FCI FCI 70-2 standards. Face-to-face dimensions dimensions shall comply with with ISA standards. 2.12 Ball or rotary valves shall be used for automated automated on-off service and shall be rated ANSI Class Class IV shutoff minimum. 2.13 Valve actuators, including springs, springs, shall be designed to fully stroke the valve against unbalanced unbalanced forces, which can result from a pressure drop across the valve equal to the maximum upstream pressure specified. Control valves shall have electro-pneumatic positioners. 2.14 Packing for automated valves shall be Teflon Teflon or glass-filled PTFE PTFE for services up to 450°F (232°C )or shall shall be graphite-based for services with operating temperatures above 450°F (232°C).




2.15 Sizing of control valves shall be based on ISA valve valve sizing equations or on sizing programs of approved valve manufacturers. In general, valves shall be sized so that the normal flow flow rate is from 50% to 80% of maximum opening of the valve. 2.16 Pneumatic instruments instruments shall normally operate with 3 to 15 psig (21-103 kPa) input input and output signals. Each pneumatic instrument shall have an air supply complete with shutoff valve and air set (air filter/regulator with output gauge). 2.17 Instrument transmitters transmitters shall be HART smart with with 4-20 mA output. 2.18 Temperature elements shall shall be type K thermocouples or 3-wire 100 ohm Pt RTD, unless otherwise otherwise specified. 2.19 Where multiple alarm conditions conditions may exist, the Supplier shall provide provide a set of voltage free contacts for an external common trouble alarm, rated for 120 V AC. 2.20 Temperature-sensing devices devices shall be mounted in thermowells where exposed exposed to process streams. Preferred installation of the thermowell shall be in a piping elbow pointed toward the flow. 2.21 Unless otherwise specified, purge systems systems shall be in accordance with NFPA NFPA 496 Type Z Classification. 3. ELECTRICAL REQUIREMENTS 3.1 Design, materials, equipment, equipment, and installation shall meet the specified specified electrical area classification. classification. 3.2 The electrical items items of the packaged equipment equipment shall be mounted and wired wired by the supplier. Packaged equipment wiring shall be brought out to identified terminal blocks in skid-mounted junction boxes or control panel. Wiring shall be appropriately labeled to identify the device to to which it is associated. Junction boxes shall be located for easy access. 3.3 Wiring shall be separated by voltage level and application application as follows: AC power and control; control; DC power and control; Electronic signal wiring, intrinsically safe and non-intrinsically safe (e.g., separate conduit, separate terminal strips). Design and use of AC power greater than 120 V AC for instrumentation instrumentation shall require require approval of Purchaser. AC and DC power wiring shall shall be a minimum of 12 AWG copper THHN/THWN THHN/THWN 600-volt rated. rated. Wiring shall be permanently permanently labeled at both ends. If DC power distribution is provided within within a local panel, fused terminals shall be used for individual circuit protection unless the terminals are current limited. 3.4 Single conductor panel wiring wiring used for AC and DC signals shall be 18 AWG minimum minimum size, 7-strand copper construction, Type ITC, and shall have 90°C insulation suitable for DC circuits in wet or dry locations. Wiring from junction boxes to individual instruments shall be shielded twisted pair or triad 16 AWG minimum in conduit. 3.5 Use of AC receptacles shall be minimized minimized but where required shall be the 3-wire 3-wire type: hot (black), neutral (white), and ground (green), with the ground wire connected to ground per NEC. 3.6 Terminal strips in junction junction boxes and local panels shall have field external connections connections on one side and internal panel connections on the other side. 3.7 Unless otherwise specified, specified, the local panel shall be weatherproofed to NEMA NEMA 4X, with all stainless stainless steel construction, and suitable for operation in the environmental conditions specified. 3.8 Unless otherwise specified, specified, the junction boxes shall be weatherproofed to NEMA NEMA 4X and suitable for operation in the environmental conditions specified.




3.9 Supplier shall provide opening(s) and designated designated space for wire and tubing that will be installed installed after package arrives at site. Field installation installation shall not require cutting holes in panel or installing installing hardware inside the panel to secure Owner-installed Owner-installed wire wire and tubing. Conduit and cable entries entries shall be bottom or side. All panel openings shall be plugged for shipment to prevent water or dirt from entering during shipment or storage prior to installation. 3.10 Mechanical protection of wire wire and cables shall be provided by use of conduit or raceways. 3.11 Rigid conduit and piping shall not be routed over cases of rotating machinery (or other equipment), equipment), over or in front of removable heads on vessels and exchangers, no r where such routings would impair the functionality of inspection openings or panel doors. Drains shall be installed at low points, points, or a drip loop with a low-point drain shall be used to prevent water from draining down conduit system into an instrument or enclosure. 3.12 Liquid-tight, flexible flexible metallic conduit with accepted fittings fittings shall be used in all areas at connections where vibration, movement or adjustments are likely to occur; this type of conduit shall not be used in Class I, Division 1 hazardous (classified) locations. 3.13 Flexible metallic conduits conduits shall be specified and installed to meet the NEC NEC Article 348. 3.14 Conduit seals shall shall not be poured by Supplier. Supplier. Supplier shall provide provide the seals for pouring pouring by others at site. 3.15 Purchaser will provide an electrical power supply of the voltage; phase and frequency specified. All equipment and components on the package shall be designed and rated for operation at this voltage. 3.16 Two grounding pads of suitable ampacity ampacity shall be provided at diagonally opposite corners of each skid. skid. 4. ADDITIONAL REQUIREMENTS Instruments, equipment, and enclosures shall be identified before shipment by permanently affixing a name tag, or affixing a stainless steel tag with stainless steel fasteners.

Electrical and Instrumentation Requirements for Simple Packa.pdf

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