Technical Specification Guide for Steam Tracing and ...



TABLE OF CONTENTS

1.0 SCOPE 1

2.0 TUBING MATERIALS 2

3.0 APPLICATIONS 3

4.0 TUBING MATERIALS 4

5.0 INSTALLATION 5

6.0 PRE-INSULATION 10

7.0 MANIFOLDS 21

8.0 STEAM TRAPS 23

9.0 CONDENSATE PIPING 30

SCOPE

This specification prescribes general requirements for materials and installation of tubing used for instrumentation and heat tracing. Tubing may not be used as process piping- See Class 34 Engineering Specifications for instrumentation (including analyzer) applications.

TUBING MATERIALS

Tubing materials shall conform to the following specifications, unless specified otherwise by the engineering design:

a. Copper: Soft annealed (Temper 060), either ASTM B68, B75, B88, or B280; brass ferrules and fittings. For air, water, and nitrogen services, tubing may be coated with PVC. All instrumentation pneumatic tubing SHALL be coated with PVC.

b. Stainless Steel: ASTM A269, Type 316, solution annealed, maximum hardness Rockwell B80, welded or seamless; Type 316 S.S. ferrules and fittings.

c. Monel: ASTM B165, annealed, maximum hardness Rockwell B75, seamless; Monel ferrules and fittings.

Hardness shall be measured on the tubing O.D.

APPLICATIONS

1 General

2 Instrumentation

3 Heat Tracing

TUBING MATERIALS

1 Diameter

2 Minimum Wall Thickness

Thicknesses tabulated below are the minimum permitted. Heavier wall tubing may be less expensive; selection should be based on cost.

1 Copper Tubing (150 psia max.)

O.D. Minimum Wall Thickness

1.

O.D. Pressure Class Minimum Wall Thickness

1 General

1 Tubing shall be fully reamed after cutting and assembled with approved compression tube fittings in accordance with manufacturer's instructions by trained and certified personnel. The proper tools shall be used to assure adequate engagement and tightness.

2 All tubing shall be installed in a neat, workman-like manner and show no signs of crimping, bends of too short radius, flattening, etc. Extreme care shall be exercised to keep foreign matter out of the system. Tubing shall not be marked or scored. All open tubing ends and connections shall be kept plugged to keep out dust, dirt, moisture, and other foreign matter. The tubing shall be permanently mounted, supported, and protected.

3 The tubing shall be checked for correct diameter and wall thickness. The tube ends shall be cut square and deburred. Care shall be used during cutting to keep the tubing round. Tubing over twenty-four inches (24”) in length shall be installed with at least one 90° bend to provide a relief for thermal expansion.

4 On ½” O.D. and larger stainless steel and Monel tubing for services exceeding 400°F temperature or 400 psig pressure, fittings shall be pre-set (swaged) to the tube end; the fitting nut shall then be removed and the tube end inspected for proper deformation. The fitting shall then be reassembled.

5 All ½” O.D. and larger stainless steel and Monel fittings shall be pre-set (swaged) as described in paragraph 5.1.4 when installed in cramped quarters or overhead where ladders must be used.

6 PVC coating on copper tubing shall be stripped (using a knife, not a tubing cutter) ONLY as necessary to accommodate tube fittings. Fittings and tubing from which the PVC coating has been stripped shall be coated in accordance with manufacturer's instructions.

7 All bends are to be made with a tubing bender to a minimum radius of three (3) times the tube O.D.

8 Unsupported lengths of stainless steel tubing not used as heat tracing companion piping shall not exceed six feet (6’). In locations where uninsulated tubing is likely to be subjected to mechanical damage, it shall be installed in raceways.

Uninsulated copper tubing and Monel tubing not used as heat tracing companion piping, shall be installed in raceways, where possible.

Tubing installed in raceways shall be firmly attached to the support at intervals not exceeding six feet (6’).

9 Tubing shall be routed so that it is accessible, protected from process spills, and protected from mechanical damage. Support members shall be installed so they will not become a trough or trap foreign matter.

10 Where supports must be attached to equipment, provisions shall be made that will prevent vibration or expansion from affected tubing.

11 Tubing must have a minimum length of straight run adjacent to bends as follows to permit installation of fittings:

O.D. Minimum Straight

2

1 Tracers shall be attached as near as possible to the bottom of horizontal lines. Copper tubing shall be attached to the traced pipe with bare #14 B&S gage, soft copper tie wire or ½” x 0.02" copper clad steel bands. Stainless steel tubing shall be attached to the traced pipe with #16 B&S gage stainless steel wire or ½” x 0.02" stainless steel bands. Tie wires or bands shall be spaced at approximately three-foot (3’) intervals.

2 Tracer lines should be arranged so that flow is generally downwards, avoiding pockets and leaving no section of the companion line at a greater elevation than the tracer header. When it is impossible to avoid pockets, their use shall be approved by the refinery representative or Unit Superintendent (or his / her designee).

3 Each tracer line shall be continuous from the header to a trap at the end of the line with no vents, drains, branches, or deadend extensions at intermediate points; however, a SHORT branch may be permitted when self-draining and provided with a trap.

4 The length and routing of tracers shall be as specified by the engineering design, but shall not exceed five hundred feet (500’).

5 When the piece of equipment which is to be kept hot is irregular in shape, such as P-traps, strainers, valves, and pumps, the tubing shall be spirally wrapped vertically, starting at the top and working toward the bottom.

6 Tubing unions shall be installed in the tracer at traced line flanges or unions, where necessary to permit removal of valves, strainers, pumps, etc., for maintenance and inspection. Tracers on instruments shall be installed so that the instrument may be removed without shutting off the tracer. The use of reusable pre-insulated jackets with the integral tracing should be considered for valves and equipment.

7 Tracer piping on MEA, acid, caustic, phenol, and liquid benzene lines, and on instrument leads handling volatile stocks, shall be separated from these lines by a one inch (1") wide non-asbestos tape, suitable for a temperature of 400°F, wrapped around the steam line to a thickness of about ½”, spaced at a maximum of 18" O.C. Separation may also be effected by using small blocks of insulation, securely wired to the process pipe (see paragraph 5.2.1).

8 Alternatively, when permitted by the engineering design, a layer of insulation one-half inch (½”) maximum thickness, may be used to separate the tracer and the traced line.

9 All tracers shall have expansion loops, as required for the differential expansion between the traced line and the tracer, in order to prevent damage to the insulation. All fittings shall be located outside the jacketing of the traced line. The expansion loop shall be insulated separately.

10 Each instrument and its leads shall have a tracer separate from any piping, equipment, or other instrument tracing.

3 Instrumentation

All tubing shall be blown through with dry filtered air before connection to instruments.

4 Testing

1 Pneumatic control circuits and transmission lines shall be blown out and tested for leakage in accordance with ISA RP 7.1. Nitrogen shall be used to test all instrument lines. Do not use a portable compressor.

PRE-INSULATION

1 General

Pre-insulated single tubing 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. Leads to and from instruments, which require heat tracing may be pre-insulated bundled LIGHT trace type multi-tube, not heavy trace type.

2 Insulation

Insulation shall be non-wicking, non-asbestos, non-hygroscopic glass fiber of sufficient thickness to insure a MAXIMUM jacket temperature of 140°F at an ambient temperature of 90°F, when using 100 psig saturated steam (338°F). Process and  / or steam temperatures in excess of 338°F may require additional insulation. Consult manufacturer for upper process temperature limitations.

3 Jacketing

1 Jacketing for copper tubing may be either PVC or as required for stainless steel tubing in 6.3.2.

2 Jacketing for stainless steel tubing shall be flame retardant and of a non-chlorinated grade. Acceptable materials are thermoplastics (EPDM-based rubber) and polyurethane or user-approved equivalent. No PVC jacketing materials are allowed.

4 Installation

1 Bends should be kept to a minimum. Tubing shall be bent using a properly sized conduit bender, mandrel, or sliding shoe cable. The minimum allowable radius shall be eight times (8x) the jacket O.D., except as follows:

If tight bends are necessary, the jacket and insulation may be stripped, and the tubing bent to a minimum allowable radius of three times (3x) the tube O.D. Alternatively, elbow-type tube fittings may be used. Insulation and jacketing MUST be replaced.

2 When installing multiple groupings of tubing, allow a minimum of one half inch (½") separation between the pre-insulated lines. Layered horizontal runs are to be made by providing an insulating block spacer between layers at the recommended support centers. Do NOT bundle multiple groupings of tubing together.

3 Multiple groups of tubing should be installed using cable tray or channel-type Unistrut, including support clamps. Support clamps should have a wide bearing surface with a fixed draw-down point. Unistrut clamps should be sized one size less than the insulation jacket O.D. Do NOT use clamps or tie-wrap fasteners, which exert point pressure.

4 Individual pre-insulated tubes may be supported in channel or angle and secured with UV-resistant plastic or stainless steel tie-wrap fasteners, ¼” minimum width.

5 Minimum support centers are every four to six feet (4’ - 6’) in the horizontal plane and twelve to fifteen feet (12’ - 15’) in the vertical.

6 Tubing shall NOT be supported within a bend, as this will limit movement caused by thermal expansion and limit flexibility to withstand water hammer. Support clamps are not to be installed within eighteen inches (18”) of any directional change.

7 Tubing shall be sloped to insure self-draining.

8 Where tubing fittings are to be installed, the jacketing and insulation may be stripped from no more than three inches (3”) of tubing.

9 Jacketing is to be cut square.

10 At terminations, the jacketing and insulation shall be removed to a MINIMUM depth of three-eighths inch (⅜”). The exposed ends shall be sealed with the manufacturer's end sealant or RTV silicone. Use of grommets with hose clamps or heat-shrinkable boots with a temperature rating of 400°F is acceptable.

11 Heat-shrinkable boots may require installation off-site. A sufficient quantity of end sealant is to be applied to the outer surfaces of the jacketing and tubing. The boot is to be heat-shrunk using a heat-gun.

12 Grommets and hose clamps require insulation to be removed to a depth of three-quarters inch (¾”). A sufficient quantity of end sealant is to be applied to the outer surface of the tubing and the inner surface of the jacketing. The grommet shall be flush with the outer jacket and clamped tightly with a clamp or band (metal or plastic).

I

MANIFOLDS

1 Steam Distribution Manifold

The steam distribution manifold shall be of forged steel (ASTM A105) design with integral piston style valves, one per takeoff. Standard manifold units will be available in 4, 8, or 12 takeoffs. The takeoffs (outlet connections) will be ½" NPT or SW.

Typical steam inlet shall be 1½ SW with ¾” SW blowdown collection. The short steam distribution manifold (Armstrong SMSD) centerline to centerline dimension between takeoffs will be 4.72". The standard steam distribution manifold (Armstrong MSD) centerline to centerline dimension between takeoffs is 6.38". The manifolds shall have two (2) mounting holes ½"-13 UNC per four (4) section assembly. Manifold and valves shall be guaranteed for three (3) years.

2 Condensate Collection Manifold

The condensate collection manifold shall be of forged steel (ASTM A105) design with 4, 8, 12 takeoffs. The takeoffs (inlet connections) will be ½" NPT or SW.

Typical condensate outlet will be 1½" plain end for non-syphon tube design and ¾" plain end for manifolds with optional syphon tube. The drain connection shall be ¾" NPT. Manifold shall be guaranteed for three (3) years.

3 Condensate Collection Assembly

The condensate collection assembly shall incorporate a forged steel body with an Armstrong TVS (Trap Valve Station) in stainless steel with inlet and outlet piston valves, a test valve function, an integral strainer (if required) with blowdown connection and capability for a blowdown ahead of the inlet valve (if required). The Armstrong TVS shall have a universal connector so all stainless steel inverted bucket steam traps with three (3) year guarantee (or other types of traps) can be mounted to the connector. Standard design will be 4, 8, or 12 takeoffs, but 6, 9, or 10 takeoffs can also be supplied upon request. The condensate collection assembly shall be guaranteed for three (3) years.

STEAM TRAPS

1 The purpose of steam traps is to continually remove the condensate and any condensables, such as air, that are carried over by the steam. Each trap shall only serve one collections point.

2 Inverted bucket traps are recommended for steam tracing lines. A ½” trap is satisfactory for most steam tracing service. Acceptable inverted bucket traps are Armstrong Series Numbers 1010, 1011-1013, 1810, 1811, 2010, and 2011. Acceptable thermodynamic traps are Armstrong series CD-33 and CD-3300.

3 Inverted bucket traps shall be stamped for the maximum differential pressure at which they will function. Those installed where the differential is higher than the trap rating will not open. When the true differential is much lower than stamped, the trap will function, but its capacity will be reduced.

4 TVS (Trap Valve Station)

The TVS (Trap Valve Station) connector body shall be of ASTM A351 Gr. CF8M stainless steel. All other wetted parts shall be of stainless steel except the valve sealing rings, which shall be a mixture of graphite and stainless steel.

The TVS shall incorporate within the connector body an inlet valve, outlet valve, test valve, strainer, and strainer blow down valve, which can also serve as a bleed valve. The integral inlet and outlet valves shall be of piston style using graphite and stainless steel valve sealing rings and stainless steel lantern bushing. The test valve shall be a full port needle style valve of stainless steel. The blow down valve shall also be a needle style of stainless steel. The integral strainer shall be a full line size “Y" type. For compactness, the face-to-face dimension shall be 4¾” (120 mm).

The TVS shall be able to accommodate stainless steel inverted bucket steam traps, disc traps, or thermostatic traps by using two bolts to fasten the steam trap of choice to the Armstrong TVS connector block.

The TVS shall be able to perform the functions of isolation of inlet and outlet of the steam trap, test the trap through a full port valve, provide a full line strainer ahead of the trap and provide a blow down valve on the strainer. The blow down valve can also function as a bleed valve to depressurize the steam trap prior to removal of the steam trap from the connector.

The TVS shall be Armstrong Model number TVS-4000.

CONDENSATE PIPING

1 Condensate headers should be sized in accordance with Section 7.0.

2 Steam tracer traps should be grouped to the extent possible and discharge into a condensate manifold. Fabrication and assembly details for condensate manifolds are shown in Section 7.0.

3 The condensate in bucket traps may freeze if the steam is shut off during freezing temperatures. Therefore, it is advisable to provide freeze protection for bucket traps installed on steam tracing in cold climates on the assumption steam may be shut off during freezing temperatures. Freeze protection can be provided by manifolding steam tracing traps with a drip leg trap into a common manifold. Condensate from a drip leg trap will protect any closed off tracing trap tied into the manifold.

4 Condensate return systems should be considered for all units. They minimize losses to the drainage system and prevent potential safety hazards, which can be associated with peanut condensers.

5 When a condensate return system does not exist, condensate should be discharged into a non-regulated drainage system. The piping discharge should be below the minimum water level. (A non-regulated drainage system is a piping system that conveys wastes which, based on certain characteristics, are not classified as hazardous by Federal or local environmental regulations.) Under no circumstances shall steam condensate be discharged into the sanitary sewer.

The hazard of vaporizing hydrocarbons in the drainage system must be considered. If an insufficient quantity of water for quenching purposes normally exists in the drainage system, the condensate should be flashed to atmospheric pressure in a flash drum.

6 Steam condensate flash drums should be designed with a retention time of fifteen (15) minutes. Additional quench water may be required to lower the discharge temperature to approximately 100o F to 110o F. Flash drums can be designed in-ground for small amounts of condensate.

-----------------------

ENGINEERING specifications

STEAM TRACING DETAILS FOR FLOW TRANSMITTERS

34S-74, SHEET 1 OF 2

NOT TO SCALE

ISSUED 10/31/85, REV. 12/15/03

ISSUED BY: JV D’AMICO

Drawn by: jkg

ENGINEERING SPECIFICATIONS

STEAM TRACING DETAILS FOR FLOW TRANSMITTERS

34S-74, SHEET 2 OF 2

NOT TO SCALE

ISSUED 6/5/92, REV. 12/15/03

ISSUED BY: JV D’AMICO

Drawn by: jkg

NOTES:

1. INSTRUMENT LEADS WHICH CONTAIN LIQUIDS THAT CAN FREEZE, CONGEAL, OR CARRY TRACES OF WATER SHALL BE PROTECTED BY AUXILIARY HEATING AND INSULATION. VAPOR LINES CARRYING CONDENSABLES MAY ALSO REQUIRE AUXILIARY HEATING AND INSULATION TO PREVENT FREEZING.

2. AUXILIARY HEATING SHALL NORMALLY BE FURNISHED BY EXTERNAL STEAM COMPANION PIPING (STEAM TRACING). OTHER ACCEPTABLE METHODS OF HEATING PIPING ARE HOT WATER TRACING AND ELECTRIC TRACING.

3. WHERE VAPOR LINES REQUIRE AUXILIARY HEAT, AVOID HEATING ABOVE THE DEW POINT OF THE CONDENSED FLUID IN A BEND OR PIGTAIL, SINCE THIS WILL DESTROY THE SEAL NECESSARY TO PROTECT THE INSTRUMENT FROM EXCESSIVE HEAT.

4. INSULATING ENCLOSURE FOR FLOW TRANSMITTERS SHALL BE O’BRIEN CORP. POLYURETHANE “HEATPAK" WITH "TUBLOK" STEAM HEATING SYSTEM. TEFLON INSULATING SLEEVES SHALL BE PROVIDED WITH TUBE CLAMPS TO LIMIT HEAT TRANSFER.

5. USE O'BRIEN CORP. TUBE BUNDLE ADAPTER #W-640 FOR REMOTE MOUNTED TRANSMITTERS TO PREVENT MOISTURE SEEPAGE INTO HEATPAK. SEE DETAIL 4.

6. STEAM COMPANION PIPING FOR TRACING INSTRUMENTS AND INSTRUMENT LEADS SHALL BE 3/8" O.D. ASTM B88 TYPE K, OR EQUAL SOFT ANNEALED COPPER TUBING WITH CRAWFORD "SWAGELOK", PARKER – HANNEFIN "CPI", OR EQUAL BRASS TUBING FITTINGS. ASTM A179 STEEL TUBING WITH STEEL TUBING FITTINGS IS ALSO ACCEPTABLE. COPPER TUBING SHALL NOT BE USED ON SULFUR RECOVERY UNITS OR IN AN ENVIRONMENT WHERE H2S WILL ATTACK THE COPPER.

7. STEAM TRACING SHALL BE IN ACCORDANCE WITH ENG. SPEC. 54D-3, SECT. 3.3 OR SPEC. 54C-15, SECT. 13, AND AS ILLUSTRATED HEREIN.

8. D/P FLOW METER LEADS SHALL BE INSULATED TOGETHER AND UTILIZE A SINGLE SOURCE OF AUXILIARY HEAT SPACED EQUALLY BETWEEN LEADS. PREFABRICATED STEAM TRACED INSTRUMENT LEAD BUNDLES SUCH AS DEKOHON TYPE 2200 ARE PREFERRED FOR EASE OF INSTALLATION.

9. WHERE PREFABRICATED STEAM TRACED BUNDLES ARE NOT USED, STEAM COMPANION PIPING MAY BE CENTERED BETWEEN METER LEADS BY WRAPPING WITH TAPE AND TYING TO INSTRUMENT LEADS AT 2’-0" INTERVALS AS IN DETAIL 2.

10. WHERE NECESSARY, STEAM TRACING FOR ACID, BENZENE, CAUSTIC, PHENOL AND VOLATILE LIQUID LINES SHALL BE INSULATED AS SHOWN IN DETAIL 1 TO REDUCE THE TEMPERATURE OF THE INSTRUMENT LEADS.

11. IN AREAS WHERE SALT SPRAY OR OTHER CHLORIDES ARE PRESENT IN THE ATMOSPHERE, PROTECT STAINLESS TUBING WITH HIGH QUALITY SILICONE VINYL OR EPOXY COATING.

SEE SHEET 2 FOR NOTES.

34s-75, sheet 1 of 2

NOT TO SCALE

ISSUED 6/4/92, REV. 12/15/03

ISSUED BY: JV D’AMICO

Drawn by: jkg

1.

ENGINEERING SPECIFICATIONS

STEAM TRACING DETAILS FOR LEVEL INSTRUMENTS

2.

1. STEAM TRACER TUBING (INCLUDING PRE-INSULATED TUBING) SIZE, MATERIAL, CONSTRUCTION AND INSTALLATION DETAILS SHALL CONFIRM TO USER ENGINEERING SPECIFICATION 54C-11.

2. EACH TUBING BRANCH SHALL BE EQUIPPED WITH INDIVIDUAL STEAM SUPPLY CONDENSATE BLOCK VALVES AND A DEDICATED CONDENSATE TRAP.

3. PRE-INSULATED TUBING SHALL BE USED FOR SECTION FROM STEAM SUPPLY TO CONDENSATE RETURN HEADERS WHEREVER POSSIBLE.

4. TO FACILITATE GAUGE GLASS REMOVAL, TUBING UNIONS SHALL BE INSTALLED AT ALL PROCESS FLANGE CONNECTIONS AND AT THE DOWNSTREAM CONNECTION OF PROCESS SOCKET WELD OR THREADED VALVES.

5. A MAXIMUM OF THREE (3) GAUGE GLASS ASSEMBLIES SHALL BE SUPPLIED BY ONE (1) BRANCH OF STEAM TRACING.

6. LIGHT TRACE TUBING SHALL USE INSULATED SPACERS (NON-ASBESTOS CLOTH TAPE) AT 12” INTERVALS, MINIMUM ¼” THICKNESS, TO AVOID OVERHEATING OF CONDENSABLES / LIQUIDS. SEE DETAIL A. INSULATED SPACERS MAY BE APPLIED TO PROCESS PIPING IF DESIRED.

7. HEAVY TRACE TUBING (NO INSULATED SPACERS) MAY BE REQUIRED WHERE VISCOUS OR HIGH MELTING POINT CONDENSABLES / LIQUIDS ARE ENCOUNTERED.

8.

1. TRACER LINES SHALL BE ARRANGED WITH fLOW DOWNWARD AVOIDING POCKETS. THE TOTAL POCKET LENGTH SHALL NOT EXCEED 20 fT IN LENGtH AND MUST BE APPROVED BY THE REfINERY REPRESENTATIVE OR EQUAL

2. INSULATION Shall BE IN ACCORDANCE WITH USER ENGINEERING SPECIFICATION 35C-15.

3. TRANSMITTER INSULATED HEATPAKS ARE TO BE Manufactured BY THE O'BRIEN CORPORATION; ST. Louis, MO. OR USER APPROVED EQUAL. REFER TO USER ENGINEERING SPECIFICATION 34S-74 FOR DETAILS OF CONSTRUCTION AND MODEL / DRAWING NUMBERS.

4. ELECTRICAL TRACING MAY BE USED IN PLACE OF STEAM. TRACER TAPE SHAlL BE RESISTANCE TYPE, SELF-LIMITING AND FAIL SAFE. EACH INSTRUMENT BRANCH SHALL HAVE A DEDICATED ELECTRONIC CONTROLLER USING RTDS, THERMOCOUPLES OR OTHER TEMPERATURE SENSING DEVICES, AND INCLUDE GROUND fAULT PROTECTION AS A MINIMUM. MICRO-PROCESSOR BASED MONITOR SYSTEMS SHOULD BE CONSIDERED ON PROCESS CONTROLLING APPLICATIONS. CAUTION SIGNS ARE TO BE INSTALLED AT EACH INSTRUMENT ALERTING OPERATING AND MAINTENANCE PERSONNEL ELECTRIC TRACING EXISTS. ELECTRIC HEAT TRACING MATERIAlS, CONSTRUCTION AND INSTALLATION DETAILS SHALL CONFORM TO USER ENGINEERING SPECIFICATION 20C-19.

5. HEAT TRACING OF CAUSTIC liquids, MAY REQUIRE ADDITIONAL SPACERS (SEE DETAIL A) OR A LAYER OF INSULATION TO PREVENT LOCALIZED BOILING.

ENGINEERING specifications

STEAM TRACING DETAILS FOR LEVEL INSTRUMENTS

34S-75, SHEET 2 OF 2

NOT TO SCALE

ISSUED 6/4/92, REV. 12/15/03

ISSUED BY: JV D’AMICO

DRAWN BY: JKG

ENGINEERING SPECIFICATIONS

INSTALLATION OF PROTECTIVE STEAM HEATING SYSTEMS

TYPICAL ARRANGEMENT OF

TRACER FOR PIPE

not to scale

ISSUED 12/83, REV. 12/15/03

ISSUED BY: JV D’AMICO

DRAWN BY: JKG

FIGURE 8

Note: For severe climate applications, tracers shall have no low points (pickets) where condensate could collect.

ENGINEERING specifications

CAGED TRACER SUPPORT

INSTALLATION OF PROTECTIVE STEAM HEATING SYSTEMS

not to scale

ISSUED 12/83, REV. 12/15/03

ISSUED BY: JV D’AMICO

DRAWN BY: JKG

30P

FIGURE 9

SPIRAL AND COILED WOUND

TRACER SUPPORT DETAIL

38 X 6 MM MINIMUM 3 SUPPORTS PER 180O MAX PITCH = 900 MM

THICKNESS OF INSULATION

MINIMUM 65 MM

TRACING NOMINAL

13.5 OD

M16

C

B

50 X 6 MM

DISTRIBUTION MANIFOLD

COLLECTION MANIFOLD

RING

38 MM

50 MM

6 MM

12 MM

POSSIBLE LOGS FOR FOUNDATION BOLTS

THICKNESS 6 MM

MINIMUM 3 SUPPORTS PER 180O

MAX PITCH = 900 MM

MINIMUM 65 MM

BOTTOM PLATE

FIGURE 10

CAGED TRACER SUPPORT

NOTE: DIMENSIONS B AND C DEPEND ON THE EXPECTED EXPANSION DIFFERENCE BETWEEN GAGE AND VESSEL.

ELEVATION

COIL (75 MM)

CENTER TO CENTER

75 MM

TANGENT

LINE

TANGENT

LINE

A

(NOTE 5)

A

(NOTE 5)

DETAIL A

JACKET FASTENED WOOD BEARING STRIP WITH 20 MM NO. 8 RH WOOD SCREWS ON 300 MM CENTERS

.75 MM

GALVANIZED JACKET

DETAIL A

INSULATION

WOOD BEARING STRIP

STEAM

INLET

INSULATING 300 MM

SPACERS-TWO LAYERS OF 50 x 6 MM

TAPE ON CENTERS

6 MM GALVANIZED BOLTS ON 300 MM CENTERS

BAND HOLDING COIL IN PLACE

38 MM DIAMETER HOLES IN INSULATION ON 300 MM CENTERS

SECTION I-I

TO TRAP OR

COLLECTION MANIFOLD

ENGINEERING SPECIFICATIONS

DRUM HEATING COIL

INSTALLATION OF PROTECTIVE STEAM HEATING SYSTEMS

not to scale

ISSUED 6/5/92, REV. 12/15/03

ISSUED BY: JV D’AMICO

DRAWN BY: JKG

INSTALLATION:

1. INSULATING TAPE SPACERS SHALL BE WRAPPED AROUND THE DRUM AT 300 MM INTERVALS.

2. COILS SHALL BE TIED TO THE DRUM WITH TWO 18 X 5 MM STAINLESS STEEL BANDS AT EACH SPACER.

3. THE INSULATION WITH WOOD BEARING STRIPS AT THE TOP FOR PROTECTION SHALL BE BANDED OVER THE COILS USING 18 X 5 MM STAINLESS STEEL BANDS ON 300 MM CENTERS, BANDS SHOULD BE OVER INSULATING TAPE WHERE APPLICABLE.

4. THE JACKET SHALL BE ATTACHED TO THE WOOD BEARING STRIPS AND BOLTED TO THE TOP. THE ENDS OF THE JACKET SHALL BE PACKED WITH INSULATION AND SEALED WITH WEATHER-COATING.

5. WHEN DIMENSION ‘A’ IS LESS THAN 300 MM THE END COILS SHALL BE ELIMINATED.

FIGURE 12

CROSS SECTION OF LOOP

APPROX.

75 MM

12 X 0.5 MM

STAINLESS STEEL BANDING

INSULATION

TRACER

METAL SURFACE

FIGURE 14

TYPICAL HEAT TRACING FOR PUMPS

TO TRAP

FIGURE 15

COILED HEAT TRACING FOR VESSEL BOTTOMS

TO TRAP

TUBULAR

STEAM

TRACER

STUD WASHER AND NUT ASSEMBLY

[pic][?]5678STUVYZ_`AZ{|}~€?‚?žÎ38 X 6 MM STEEL STRAP. LENGTH AS REQUIRED

FIGURE 13

SPIRAL TRACING FOR VESSEL BOTTOM

(see figure 9 of Spiral And Coiled Wound Tracer Support for support bracket)

ENGINEERING specifications

TYPICAL TRACING DETAILS

INSTALLATION OF PROTECTIVE STEAM HEATING SYSTEMS

not to scale

ISSUED 12/83, REV. 12/15/03

ISSUED BY: JV D’AMICO

DRAWN BY: JKG

-----------------------

STEAM TRACING & CONDENSATE COLLECTION

ENGINEERING SPECIFICATIONS

STEAM TRACING & CONDENSATE COLLECTION

ENGINEERING SPECIFICATIONS

STEAM TRACING & CONDENSATE COLLECTION

ENGINEERING SPECIFICATIONS

STEAM TRACING & CONDENSATE COLLECTION

ENGINEERING SPECIFICATIONS

STEAM TRACING & CONDENSATE COLLECTION

ENGINEERING SPECIFICATIONS

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