3.0 INSULATED AND HEAT TRACED TUBING BUNDLE

Transcription

1 1.0 SCOPE This specification is to be used for: 1.1 Instrument winterizing and protection of field mounted transmitters, manifolds and associated piping when the process fluid is subject to freezing. 1.2 Sample, process and utility piping less than 25mm (1 ) in diameter shall utilize pre-insulated and pre-traced tubing bundles when freeze protection, personnel protection or temperature maintenance is required. 1.3 Instrument impulse lines Impulse tubing shall be heat traced to maintain freeze protection at the specified ambient temperature. Pre-traced tubing bundle shall be utilized on tubing runs in excess of 0.5 meter (2 ft). Runs less than 0.5meter (2 ft.) shall be field traced and insulated Impulse connections less than 1 meter shall be made with each required connection in its own pretraced bundle. Eg; Flow transmitters with impulse lines less than 1 meter shall be connected using two sections of tubing bundle each with one process tube and required tracer. 1.4 Analyzer and continuous emissions monitoring sample lines, and chemical injection tubing Sample lines and chemical injection tubing shall be heat traced to maintain freeze protection or temperature maintenance at the specified ambient temperature. Pre-traced tubing bundle shall be utilized on tubing runs in excess of 0.5 meter (2 ft.). Runs less than 0.5 meter (2 ft.) shall be field traced and insulated. 1.5 Steam distribution and condensate return systems less than 10.3 Bar / 186 C (150psi / 366 F) Tubing less than 25mm (1 ) in diameter used for self draining steam supply and condensate return systems equipped with automatic freeze protection drains shall utilize pre-insulated tubing bundle Tubing less than 25mm (1 ) in diameter used for steam supply and condensate return that are not self draining and equipped with automatic freeze protection drains shall utilize electrically traced tubing bundle for all runs greater than 1 meter (3 ft.). 2.0 COORDINATION To insure fully integrated instrument insulation and heat traced system the supplier of the instrument heating boxes and pre-insulated electrical heated traced tubing should be the same. 3.0 INSULATED AND HEAT TRACED TUBING BUNDLE 3.1 Construction The bundle must be designed such that the outer jacket temperature will not pose a burn hazard to personnel on the maximum ambient day All tube bundle materials must be suitable for installation at -40 C (-40 F) The thermal insulation shall be nonflammable self-extinguishing, nonhygroscopic and chemically inert and shall have an average water-soluble chloride content of 45 ppm or less with a maximum permissible level of 100 ppm The jacket shall be a nonflammable self-extinguishing halogen free thermoplastic continuously extruded through the entire length of the bundle.

2 Optionally the jacket may also be required to meet the antistatic surface resistance requirements of IEC/EN :2009 and EN : The dual tubing bundles shall be of parallel (not cabled) construction to reduce work hardening and provide a minimum bend radius with no tube kinking Tube bundles with tube diameters less than 19mm (3/4 ) and an overall diameter of less than 50mm (2 ) shall have a 200mm (8 ) maximum bend radius Tube bundles shall be terminated utilizing manufacturer recommended accessories. 3.2 Electrically Traced Self regulating heating cables capable of withstanding maximum possible process fluid temperatures shall be used Heater cable shall have a metal braid and fluoropolymer overjacket Impulse line tracing shall be thermostatically controlled if it is necessary to prevent boiling or vaporizing the process fluid at the high design ambient Process maintenance tube bundles for Analyzer sample transport or Chemical injection, will be powered from circuit breakers provided by Buyer. The circuits shall be set to maintain temperatures listed in Buyers attached list Heater wattage is to be designed and verified by the supplier for both freeze protection and process maintenance applications Power connection and entry glands shall be approved for the area classification. 3.3 Steam Traced Steam distribution, tubing bundle shall preferably be used for leads from the supply header to the piping or equipment being traced and from the piping or equipment being traced to the steam trap Consideration must be given to insure that no more than 10% drop in steam occurs from the supply point to the steam trap connections. 3.4 Tubing Selection Tube size, wall thickness, construction and material shall be specified and be compatible with the process conditions General instrumentation, steam distribution and condensate return Except as specifically allowed or defined all process tubes will be seamless 316L SS with diameter and wall thickness per the specification ASTM A213-EAW Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes. Exception for Average Wall Nominal wall thickness is used, not minimum wall thickness ASTM 269 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service ASTM 632 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service ASTM A1016 / A1016M Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes NACE MR0175 Standard Material Requirements for Metals for Sulfide Stress Cracking and Stress Corrosion Cracking Resistance in Sour Oilfield Environments Certificate of Conformance per EN Inspection Documents for Metallic Products

3 3.4.3 Analyzer and continuous emissions sample lines All tubing shall be Thermocouple Cleaned (TCC) per ASTM A632-S Wherever possible tubing shall be one continuous unbroken length from sample point to sample conditioning cabinet or analyzer All tubing used for critical measurements shall conform to the following additional specifications and requirements based on the concentration of the compound to be measured: Moisture Measurements For gas and moisture measurements below 40ppm process tubing shall be: Electropolished tubing, TrueTube EP as supplied by O Brien Corporation, St. Louis, MO USA or approved equal Processed and electropolished in a manner consistent with an ID surface finish per ANSI/ASME B46.1 of 20 µin maximum and fewer than 4 distinguishable pits, inclusions or defects visible in a 0.5-inch square window Cleaned with deionized water to remove all traces of electrolyte and other contaminants after electropolishing Dried with Nitrogen containing less than 1 ppm moisture and capped Continuous length. Orbital welded sticks are not acceptable For gas and moisture measurements below 10ppm process tubing shall be: Electropolished tubing with SilcoNert 2000 (Sulfinert) fused silicon coating, TrueTube EPS as supplied by O Brien Corporation, St. Louis, MO USA or approved equal In compliance with all requirements of Sections through before the application of Sulfinert coating Sulfur Compound Measurements 4.0 INSTRUMENT ENCLOSURES For sulfur compound measurements below 40ppm process tubing shall be: Chemically polished tubing with SilcoNert 2000 (Sulfinert) fused silicon coating, TrueTube FS as supplied by O Brien Corporation, St. Louis, MO USA or approved equal Tubing shall be chemically cleaned and polished Tubing shall be passivated with 20 40% nitric acid in deionized water Tubing shall be thoroughly rinsed in deionized water and dried with nitrogen before the application of Silcosteel coating For sulfur compound measurements below 15ppm process tubing shall be: Electropolished tubing with SilcoNert 2000 (Sulfinert) fused silicon coating, TrueTube EPS as supplied by O Brien Corporation, St. Louis, MO USA or approved equal In compliance with all requirements of Sections through before the application of Sulfinert coating. 4.1 The enclosures shall be designed to protect instrumentation from freezing, over-temperature, corrosion and mechanical abuse. The enclosures shall give total protection of the instrumentation, leaving no parts of the instrumentation exposed to atmosphere and weather Enclosure style shall be selected from the following:

4 Enclosure shall have a diagonal opening with lid support Enclosure shall have a horizontal opening with a hinged top Enclosure shall have a vertical opening with a front door suitable for case type instruments, sample conditioning assemblies, etc Minimum U factor shall be W/m-K (0.36 Btu/Hr-ft-F) The enclosure shall not rot, rust, and may not absorb water even if the outer surface is ripped or scarred The enclosure shall be weather proof with an IP65 rating or better and impact resistant. 4.2 Materials of Construction The enclosure shall have an outer ABS shell with integral foamed-in-place urethane insulation with a total thickness of 25mm (1 ). Glued in or laminated insulation is not acceptable Latches and hinges shall be 300 series stainless steel. Latches and hinges shall be used to allow easy access to the enclosure. Latches are to be cam-acting with adjustable tension. Hinges are to be two point with self cleaning and non-binding pivot. Hinge shall allow lid / door of enclosure to be disengaged without removing mounting screws or bolts Enclosure gasket shall be closed cell EDPM and suitable for a temperature range from -50 C to 80 C (- 60 F to 175 F) Exterior plates and mounting hardware shall be carbon steel with an electrostaticly applied polyester TGIC black powder coating similar to that used on instrument topworks. 4.3 Instrument Mounting Interior instrument supports shall be directly connected to the exterior support by metal to metal support provided by metal spacers through the wall of the enclosure The interior of diagonal and horizontal opening enclosures will be fitted with an integral adjustable rail mounting system that will allow the instrument mounting brackets to be relocated on the bottom of the enclosure without the necessity of drilling additional mounting holes Instruments and entry of pre-insulated heat traced tubing shall be positioned so that slopes to or from process connections is maintained. Configurations that create loops and low points in the impulse tubing are not acceptable. 4.4 Electric Heaters Electric heaters shall be approved to applicable ATEX Directive, NFPA/NEC or CSA standards for the correct area classification Electric heaters shall have an integral factory set temperature thermostat to measure air temperature inside the enclosure Electric heaters shall have an integral temperature fuse to protect against overheating Egress of electrical power shall be provided. 4.5 Steam Heaters Freeze Protection: Steam heaters shall be sized for operating conditions and shall maintain a temperature span will not allow either freezing or overheating of the instrumentation at both winter and summer ambient conditions Temperature Maintenance: Steam heaters shall be sized for the most severe conditions and the enclosure temperature shall be controlled using the enclosure manufactures heater control valve. 4.6 Power Connections

5 4.6.1 Instrument enclosures shall be designed to accommodate preinsulated heat traced tubing bundles for instrument impulse lines With the use of pre-traced tubing bundles, an electrical termination approved for the heating cable and electrical area classification shall be used. The power supply for the pre-insulated tubing bundles and enclosures shall be integrated into a single location at the enclosure. 4.7 Options For instruments with local indicators a safety glass viewing window is to be provided. A minimum 150mm (6 ) diameter viewing area is required Heat shrink entry seals or surface plates with the appropriate hole sizes for process entry lines are required. Grommets are not acceptable Mechanical seals that maintain the IP rating of the instrument heating box shall be used to provide egress for all tubing, instrument and electrical connections Sealant for field penetrations or drain tubing to be provided Drainage for the enclosure to be provided in the event of a leak or spill The enclosures shall have exterior tagging that contains as a minimum the enclosure model number and a traceable serial number. Additional tag information may be added at customers request A 50 x 150mm (2 x 6 ) white phenolic tag with 12mm (1/2 ) black lettering is to be affixed to the outside of the enclosure containing the instrument tag number All enclosure mounts, brackets, entry plates, and accessories are to be factory located and installed Customer supplied instruments, manifolds, and valves to be installed by the enclosure manufacturer. Leak testing of the final assembly to be performed prior to shipment. All enclosures to be placed in individual cartons and palletized to minimize damage during shipment. 4.8 Approval drawings showing instrument layouts and corresponding preinsulated and traced impulse lines is required. 5.0 MODULAR INSTRUMENT SUPPORTS 5.1 Instrument supports shall be constructed with fully modular design to allow field modification without cutting or welding. 5.2 The supports shall have an exterior finish with a minimum of 0.2mm (9 mils) of metallized zinc coating. Zinc shall be arc sprayed directly onto shot blasted base steel to provide a bonded coating resistant to chipping, corrosion, and high temperature. Hot dipped or plated zinc finishes are not acceptable. 5.3 Components shall be fabricated from minimum 6mm (1/4 ) carbon steel plate, schedule 40 structural pipe and / or 4.75mm (0.188 ) wall formed tubing. 5.4 All mounting plates shall have slots for mounting. Drilled / punched holes are not acceptable. 5.5 All floor mounts shall have a 6mm (1/4 ) thick steel 250mm x 250mm (10 x 10 ) base plate with 16mm (5/8 ) wide slots to accept 150mm x 200mm (6 to 8 ) mounting bolt centers and two 200mm (8 ) high gussets for increased structural strength. 5.6 All components with extensions longer than 75mm (3 ) shall be welded closed with no weep holes. 5.7 All set screws shall be reversed knurled cup point. 5.8 Hand rail mounts to be installed without field drilling or welding. 5.9 Cable mounts are preferred for all lines 3 NB and larger in diameter. Cable mounts shall incorporate calibrated compression washers to allow for expansion and compression caused by temperature fluctuation. Cable mounts capable of mounting to NB process lines from 3 to 16 or alternately 3 to 36.

6 5.10 U-Bolt mounts are preferred for NB line sizes up to 2-1/2 diameter Modular supports must be fully tested and documented by the manufacturer providing model numbers and load ratings Components shall be O Brien SADDLEPAK modular support system. 6.0 ENGINEERING DATA REQUIREMENTS The Seller shall furnish the following data with his quotation. 6.1 Model number and complete descriptive literature for all material quoted. 6.2 A list of items individually priced for heating enclosures, bundles, seals, tape, jacket patches, boots, equipment tags and nameplates and any other accessories bidder feels may be needed. 6.3 Installation, Operation, and Maintenance Instructions shall cover all the equipment supplied, 6.4 Electric Traced Systems: Heat load calculations and enclosure heater sizing for stated conditions Nominal Cable watt densities at 10 C (50 F) and stated voltages for all proposed cable Maximum run lengths per circuit breaker sizing and minimum start-up temperature for each tubing bundle configuration supplied Complete installation instructions including the following details: cable splicing and terminating. 6.5 Steam Traced Systems: Maximum trapping distance based on 10% pressure drop. 7.0 ADDITIONAL REQUIREMENTS 7.1 Manufacturer's standard quality control tests. 7.2 Warranty in regards to the bundle and accessories quoted. 7.3 Preparation for Shipment shall be in accordance with Seller's standards. 7.4 Seller shall be solely responsible for adequacy of the preparation for shipment to ensure that the material reaches its destination in ex-works condition.

7 2017, by AMETEK, Inc. All rights reserved QLT-SPECIFICATION_CONSOLODATED 5 MAY 2017 BELGIUM BRAZIL CHINA RUSSIA SINGAPORE SOUTH KOREA USA sales.obrien@ametek.com