specification for hot insulation · 2019-01-24 · specification for hot insulation 4 of 55 3.2...

Specification for Hot Insulation 1 of 55

SPECIFICATION FOR HOT INSULATION


TABLE OF CONTENTS

1.0SCOPE .. ............................................................................................................................................. 3

2.0GENERAL . ............................................................................................................................................. 3

3.0MATERIALS ............................................................................................................................................ 3

4.0APPLICATION ......................................................................................................................................... 4

5.0REUSABLE PAD TYPE INSULATION COVERS............................................................................................. 10

6.0STORAGE TANKS .................................................................................................................................. 12

7.0INSPECTION AND QUALITY CONTROL .................................................................................................... 13


1.0 SCOPE

1.1 This specification covers specific materials, fabrication, installation, and inspection requirements for insulation of hot process piping, vessels, tanks, and equipment operating between the temperatures of 70�F (21�C) and 1200�F (649�C). 1.2 The insulation described herein is limited to that required for conservation of heat, maintenance of operating temperature, and/or personnel protection. 1.3 Exceptions or variations shown in the project specifications shall take precedence over the requirements stated herein. Alternatives stated in this specification may be exercised subject to prior written COMPANY approval.

2.0 GENERAL

2.1 Vessels, equipment, and piping shall be insulated in accordance with the project specifications and this document. The term "vessel" includes towers, drums, reactors, heat exchangers, and similar items. The term "equipment" includes such items as engines, turbines, and pumps. 2.2 The Insulation Material Specification and thickness requirements are indicated on the drawings and piping isometrics. Equipment insulation material and thickness requirements are indicated on the equipment schedule. 2.3 This specification requires compliance with all applicable federal, state, and local laws and regulations.

2.4 Insulation shall not be applied to any piping, vessels, or other process equipment before any required protective coating has been applied and such items have been inspected, tested, and approved for the intended services unless prior COMPANY approval is obtained. 2.5 The MANUFACTURER'S recommendation shall be followed in handling, storage, and application of insulation system components. Strict adherence to the MANUFACTURER'S suggested operating limitations is required. 2.6 The insulation shall be protected from moisture, weather, and damage before, during, and after application. 2.7 All surfaces to be insulated shall be dry. All insulation shall be kept dry prior to application of the weather barrier. If insulation becomes wet, it shall be discarded and replaced. 2.8 No field welding of insulation clips or supports, etc., is to be done except with specific written authorization of the COMPANY representative. Welding materials and procedures shall be reviewed, and welders shall be tested and approved prior to receiving written authorization. 2.9 Nameplates and code stamps shall be left uncovered and readable.

3.0 MATERIALS

3.1 Materials (specified or referenced by MANUFACTURER) and designation are intended to define the type and quality of material only and are not intended to exclude equal or better items offered by other MANUFACTURERS. Products of reputable MANUFACTURERS and of comparable type, quality, and other physical characteristics may be proposed for use, subject to COMPANY approval.


3.2 Insulation materials shall be compatible with the surfaces on which they are applied. Galvanized materials such as tie wire and chicken wire mesh shall not be used on stainless steel piping and vessels. All such materials for use on stainless steel piping and vessels shall be stainless steel. 3.3 "Galvalume" jacketing shall not be used on stainless steel piping and vessels. 3.4 Only non‐asbestos materials shall be used. 3.5 Flashing compounds, joint sealers, caulkings, and mastics shall require COMPANY approval prior to any material commitment or start of work. 3.6 All materials shall be new. Materials such as insulation blocks, pipe coverings, cements, and weathering compounds shall be furnished at the jobsite in factory sealed containers. 3.7 Specific material requirements are found in the Insulation Material Specifications (COMPANY Engineering Specification IH‐1.0.1) and is to be considered a part of this Specification. 3.8 Insulation materials shall have a flame spread and smoke density rating of 25/50 or less per ASTM E 84.

4.0 APPLICATION

4.1 General 4.1.1 Unpainted metal surfaces shall have grease, rust, dirt, and other foreign materials removed by solvent cleaning and wire brush or by other means acceptable to the COMPANY prior to insulating. Stainless steel items shall be wire brushed with stainless steel brushes only. Painted metal surfaces shall have grease, dirt, and other foreign materials removed by solvent cleaning or by other means acceptable to the COMPANY prior to insulating.

4.1.2 Chlorinated solvents shall not be used for cleaning stainless steel. 4.1.3 All insulation sections shall be trimmed and tightly butted to eliminate voids. 4.1.4 When standard flat blocks trimmed to fit in the field are used, all joints shall be pointed up with insulating cement before applying the weather barrier. This does not preclude the use of scored and beveled blocks wherever possible. 4.2 Piping and Vessels 4.2.1 Pipe diameter will be that of published nominal pipe sizes. Tolerances shall be in accordance with the applicable ASTM specification 4.2.2 When insulation is called for on piping, any additional items relating to the lines, such as vents, drains, and bypasses that form a part of the piping system, shall be considered part of the insulation work, even though they are not identified by an individual line number. 4.2.3 Piping and cylindrical vessels with outside diameters of 30 inches (760mm) and less shall normally have "sectional preformed pipe" insulation. a. Insulation may be installed in single or

multiple layers. No individual layer shall be more than 3 inches (76mm) thick.

b. The outer layer of sectional pipe insulation shall be secured with wire or bands on 9 inch (229mm) centers. Inner layers shall be secured on 18 inch (457mm) centers. Insulation on piping and vessels 12 inches (305mm) in diameter and smaller shall be secured with wire. Insulation on piping and vessels larger than 12 inches (305mm) in diameter shall be secured with bands.

c. Wire ends shall be bent and pressed into the insulation.

d. In all cases, at least four (4) wires or bands per 3 foot (910mm) section of insulation shall be installed on the outer layer.


e. In multiple layer installations, all joints in adjacent layers shall be staggered a minimum of 2 inches (51mm).

f. Each layer shall be secured with wire or bands before the succeeding layer is applied.

4.2.4 Insulation shall be omitted 9 inches (229mm) either side of pipe supports on NPS 2 and smaller pipe if the pipe rests directly on the support. The insulation shall be continuous where the pipe is heat traced or where the pipe is supported on pipe shoes. 4.2.5 Piping and cylindrical vessels with outside diameters over 30 inches (760mm) shall be insulated with preformed curved segments, mitered logs cut from flat blocks, or blankets. a. Block and curved segment insulation shall

be applied with length of block/segment parallel to greatest length of surface to be insulated. All successive end joints shall be staggered and the blocks scored or sized to eliminate gaps between surfaces and blocks. Block and curved segment insulation can be applied in multiple layer construction, where required, with all joints in the adjacent layers staggered a minimum of 2 inches (51mm).

b. No individual layer shall be more than 3 inches (76mm) thick.

c. The outer layer of insulation shall be secured with bands on 12 inch (305mm) centers. Inner layers shall be secured with bands on 18 inch (454m) maximum centers.

d. The edges of metal mesh covered blanket insulation shall be laced with wire to the adjacent blanket on both sides.

e. Blanket insulation shall be cut to wrap around the vessel in one piece wherever practical.

f. Multi‐layer insulation is required where the operating temperature exceeds 600�F (316�C).

4.2.6 Expansion springs shall be installed on all bands that secure the outer layer of insulation on cylindrical surfaces as required by Table 1 of this specification. Expansion springs shall be evenly spaced around the circumference. 4 inch (102mm) long springs shall be stretched 1/2 inch (13mm) upon installation. a. Expansion springs shall also be installed on

all bands that secure the inner layers of insulation in accordance with Table 1 of this specification where brittle or fracturable insulation materials, such as calcium silicate or cellular glass, are used.

4.2.7 Attachments on vessels projecting beyond the insulation, such as stiffening rings, shall be considered an integral part of the vessel and shall be insulated and finished in the same manner as the vessel. Thickness of insulation on such attachments and projections shall be the same as the adjoining insulation. 4.3 Heat Tracing 4.3.1 Where heat tracing is indicated, pipe insulation must normally be at least one pipe size larger than the pipe or must have an extended leg on the tracer side. No grooving or deforming of the insulation to accommodate the tracing will be allowed. a. For traced lines larger than 2 inch (51mm),

stabilize the insulation with 1 inch (25mm) by 9 inch (229mm) long spacers on 18 inch (457mm) centers between the insulation ID and the pipe OD. Spacer material shall be the same as the pipe insulation. Center spacer at supported butt joints. Spacer shall be thick enough to provide firm support.

b. Secure insulation on electric traced piping systems with 1 inch (25mm) wide filament tape. Wrap the tape 1 1/2 times around. Do not use wire.


4.3.2 No insulation material shall be applied between the pipe and tracer except for spacers to prevent local overheating of the pipe where specified. 4.3.3 On vertical piping provide draft stops of heat transfer cement on approximately 4 feet (1.2m) centers. a. For temperatures to 375�F (191�C) use

nonhardening HTM. For temperatures 375�F (191�C) and above use water soluble HTM.

b. Do not use insulating and/or finishing cement.

c. Tie a piece of scrim glass cloth around pipe and tracer to support the HTM. The HTM shall be 1 inch (25mm) wide.

4.4 Insulation Supports 4.4.1 Location and details of insulation supports, if provided, will be shown on vessel and equipment drawings or piping isometrics. Where insulation supports have not been provided, the insulation shall be supported by the insulation CONTRACTOR in accordance with good practice and with the approval of the COMPANY representative. a. Good practice shall include supporting pipe

outside the insulation, outdoors and areas where the insulation can get wet.

4.4.2 On vertical piping runs, the insulation CONTRACTOR shall furnish and install all clamped insulation supports. a. If vertical lines are steam or electric traced,

these supports shall provide adequate clearance for the tracer.

b. Insulation supports shall be in accordance with dimensions specified in Figure 2 of this specification and shall be installed at 21 foot 1 inch (6.43m) intervals, maximum.

4.4.3 Vessel insulation supports will be provided by the vessel FABRICATOR in accordance with Figures 4, 5, and 6 of this specification for vertical vessels and Figure 7 of this specification for horizontal vessels. 4.4.4 On vessels that are skirt‐supported, the insulation support ring for the bottom head shall be welded to the inside of the skirt if it is not provided by the vessel shop. The support ring shall not contact nozzles or any other protruding metal. 4.4.5 Welding pins may be used to support insulation on spherical vessels or on irregular compound curved surfaces, subject to COMPANY approval. In such applications, speed clips shall be used to hold insulation on studs that are bent over above the clip. Split pins shall be spread, bent over, and embedded 1/2 inch (13mm) into the insulation. Depressions shall be filled with insulating cement. See paragraph 2.8 of this specification. a. Spacing and layout details for welding studs

shall require COMPANY approval. 4.5 Insulation Expansion Joints 4.5.1 Vertical and horizontal vessels and piping operating at or above temperatures of 500�F (260�C) shall have insulation expansion joints provided at each support or stiffening ring, 21 foot 1 inch (6.43m) maximum spacing. a. The expansion space between the

underside of the ring and the insulation shall be packed with loose mineral fiber insulation. The loose mineral fiber shall be packed to of its unrestrained volume.

b. The loose mineral fiber insulation shall be retained by the jacketing or a suitable flashing to prevent rainwater entering into the expansion joint.

c. Locate expansion joints at the top of vertical runs on pipe.


4.5.2 At least one expansion joint shall be provided for each vessel or piping run in excess of 8 feet (2.44m) in length and operating at temperatures at or above 500�F (260�C). Insulation expansion joints are not required for vessels or piping runs less than 8 feet (2.44m) in length. 4.5.3 Insulation expansion joints are not required on vertical vessels insulated with block insulation where the insulation supports are designed and spaced as shown in Figure 6 of this specification, since the insulation blocks are slightly compressed in this insulation system. Insulation expansion joints are required on vertical vessels insulated with blanket insulation as shown in Figure 5 of this specification. 4.6 Insulation Terminations 4.6.1 The open end of all insulation shall be neatly finished and weatherproofed by either using preformed metal caps or reinforced mastic system. a. Preformed caps shall be used wherever

practical and shall be of the same material as the jacketing. All seams and joints shall be caulked. Where other than metal jacketing is applied, use the reinforced mastic.

b. When it is not practical to use preformed caps, the open end of the insulation shall be beveled and sealed with glass cloth reinforced mastic, applied as described in paragraph 4.12.6 of this specification.

4.6.2 Insulation adjoining flanges shall be terminated at a suitable distance from the flange to allow easy removal of nuts and stud bolts without damage to the insulation. Recommended distance is the length of flange bolts plus 1 inch (25mm). See Figure 3 of this specification. 4.7 Flanges and Valves

4.7.1 Flanges and flanged valves in insulated lines shall be insulated where specified by the drawings or project specifications. Reusable pad type insulation covers shall be used where they are required to be insulated. See Section 5 of this specification for reusable pad type cover specifications. 4.7.2 Screwed valves shall be insulated with insulating cement and finished with mastic or covered with continuous pipe insulation where feasible. See Figure 3 of this specification. 4.7.3 Flanges on exchangers and vessel manways shall be insulated with reusable pad type insulation covers. The permanent insulation on exchangers shall be terminated at a suitable distance from the flanges to allow the removal of flange bolts without damage to the insulation. Recommended distance is the length of the flange bolts plus 1 inch (25mm). 4.7.4 Where specified, a stainless steel drip ring shall be installed around flanged connections with an NPS 1/2 drip tube extending through a grommet in the bottom of the insulation cover. 4.7.5 Flanged joints shall not be insulated until the piping system has reached operating conditions and any leaks have been eliminated. 4.8 Fittings 4.8.1 Fittings shall be insulated with premolded fittings insulation. Mitered pipe insulation may be used where premolded commercial fittings are not available. a. Where premolded fittings insulation is not

practical on NPS 1 1/2 or smaller sizes, high temperature temp‐mat fiberglass insulation shall be used.

b. Mitered pipe insulation may be used only with prior COMPANY approval.

c. Fibrous adhesive shall be used for installing calcium silicate and perlite silicate fabricated elbows and fittings. The mitered edges shall be contoured to provide clearance for the fitting cover.


d. The thickness of the insulation on fittings shall be equal to the thickness of adjoining pipe insulation.

4.9 Vessel Heads 4.9.1 Insulation of fixed vessel heads shall be installed per Figures 4, 5, 6, and 7 of this specification. 4.9.2 Vessel heads shall be insulated to the same thickness as the shells. Blanket or block insulation, neatly beveled to ensure a close fit, shall be used. a. Engineered vessel head segments shall be

considered to insure tight insulation joints and ease of installation. The FABRICATOR will require a vessel detail drawing.

4.9.3 Insulation for removable heads on exchangers, strainers, etc., shall be removable and reusable pad type covers. 4.10 Vessel Skirts 4.10.1 Insulation on both the inside and the outside of skirts shall be equal to the shell insulation thickness where the skirt is required to be insulated. 4.11 Insulating and Finishing Cement 4.11.1 Finishing and insulating cements shall only be applied to facilitate the application of a weather barrier. 4.11.2 All cements shall be completely dry prior to coating and/or covering with a weather barrier. 4.11.3 The insulating and finishing cement shall be mixed and applied according to the MANUFACTURER'S recommendations. 4.11.4 Insulating and finishing cement shall be applied to the same thickness as the adjoining insulation. 4.12 Weather Barriers

4.12.1 The insulation shall be inspected and approved by the COMPANY representative prior to application of the weather barrier. 4.12.2 All insulated outdoor piping, vessels, exchangers, and other equipment except as excluded in paragraph 4.12.6 of this specification shall be weatherproofed with metal jacketing as follows: a. The jacketing material requirements are

found on the Insulation Material Specification attached to this specification.

b. Smooth jacketing over insulation for cylindrical surfaces 30 inches (760mm) diameter and smaller shall be secured with 1/2 inch by 0.015 (13mm by 0.38mm) stainless steel bands and seals placed at 12 inch (305mm) centers, maximum, over each circumferential overlap and at least at the center of each course of jacketing.

c. Screws are not permitted to secure jacketing on electrically traced lines.

d. Smooth jacketing for cylindrical surfaces indoors or 10 feet (3m) OD or less shall be secured with minimum 3/4 inch by 0.015 inch (19mm by 0.38mm) stainless steel bands and seals placed on 12 inch (305mm) centers and over each circumferential overlap.

e. Pipe jacketing shall be applied with 2 inch (51mm) circumferential or longitudinal laps as applicable. Vessel and tank jacketing shall be applied with minimum 3 inch (76mm) circumferential and longitudinal laps. Corrugated sheeting shall lap 1 1/2 corrugations on the vertical seam.


f. Smooth jacketing and corrugated sheeting outdoors for cylindrical surfaces greater than 10 feet (3m) OD shall be secured with 1 1/4 inch by 0.020 inch (32mm by 0.51mm) stainless steel bands and seals placed on 18 inch (460mm) centers and over each circumferential lap. On corrugated sheeting the bands and seals are placed on 3 feet (.9m) and over each circumferential lap. The vertical seams shall be secured with stainless steel No. 6 self‐drilling, self‐tapping screw 1/2 inch (13mm) long on 6 inch (152mm) centers on the ridge of the corrugation.

g. On all vertical vessels and piping, "S" clips shall be used on every circumferential lap to support the jacket. "S" clips shall be spaced no more than 18 inches (460mm) apart around the circumference with a minimum of 2 clips per sheet of jacketing. The upper leg of the "S" clip shall retain the band and be screwed to the upper course of jacketing. The screw shall not bind adjacent courses of jacketing together. See Figures 5 and 6 of this specification.

h. "U" clips shall be installed on all bands on vertical vessels larger than 12 feet (3.7m) diameter that are not retained by "S" clips. The band shall rest in the pocket of the "U" clip and both ends of the clip shall be secured to the jacketing by one of the screws at each longitudinal jacket seam. The clips shall be spaced 4 foot (1.2m) on center except at expansion springs where they shall be 12 inches (305mm) on each side of the spring.

i. On horizontal equipment and piping, the longitudinal finish lap shall be positioned to shed rainwater and minimize dust collecting. The overlaps shall be positioned 30 degree below horizontal.

j. Preformed 2‐piece fitting covers for fittings shall be used wherever possible to the largest commercially available size. On larger sizes use the metal gore system.

k. Sheet metal screws shall not bind adjacent courses of jacketing together at the circumferential lap.

l. A square frame made from 20 gauge by 1 inch wide (0.89 by 25mm) stainless steel flat bar, welded together at the corners, shall be used for anchoring bands at manways and other large vessel openings. The frame shall be placed over the nozzle and the ends of the jacket bands attached to the vertical sides of the frame.

4.12.3 Expansion springs shall be installed on all bands that secure the jacketing on cylindrical surfaces as required by Table 1 of this specification. Expansion springs shall be evenly spaced around the circumference. 4 inch (102mm) long springs shall be stretched 1/2 inch (13mm) upon installation. Super Mity‐Springs shall be compressed ¼ inch (6.4mm) upon installation. 4.12.4 All overlaps in metal jacketing which are not installed in a watershed fashion, such as longitudinal seams in vertical piping and circumferential seams in horizontal piping, shall be sealed with a continuous bead of caulking compound under the laps. 4.12.5 All openings in the jacket for nozzles, brackets, nameplates, etc., shall be cut as close as possible to achieve a tight fit and sealed with a minimum 3/8 inch (8mm) bead of caulking compound. Any gap greater than 1/4 inch (6mm) is not acceptable. Do not feather edge the bead of caulking. Caulking shall be applied on a clean, dry surface. Caulk all openings on the same day the jacket is installed. 4.12.6 Irregularly shaped surfaces on which metal jacketing cannot be made to fit properly shall be weather‐proofed with an acrylic water base mastic system in the following manner: a. The surface of the insulation shall receive a

tack coat of mastic a minimum 0.015 inches (0.38mm) dry film thickness (DFT).

b. Reinforcing cloth shall be neatly stretched over the surface with edges overlapping at least 2 inches (51mm) and embedded in the tack coat.


c. A second finish coat of mastic shall be applied over the reinforcing cloth at a minimum 0.04 inches (1mm) DFT or at the MANUFACTURER'S recommended rate.

d. All mastic coats shall extend at least 3 inches (76mm) under any adjoining metal jacket.

e. Do not dilute or water down the mastic. The mastic system shall be completed on the same day.

4.13 Ultrasonic Inspection Ports 4.13.1 Ultrasonic inspection ports shall be installed by the CONTRACTOR at points designated by the COMPANY. Ultrasonic inspection ports are generally required as follows: a. Piping ‐ As shown in Figure 12 of this

specification. b. Vessels:

1. Two inspection ports shall be installed on each vessel head.

2. An inspection port shall be installed on vertical vessel shells at each platform.

3. Two inspection ports shall be installed on horizontal vessel shells for each 10 feet (3m) of length, except that a minimum of 2 ports shall be provided at each end (one on top and one on bottom).

4.13.2 Inspection ports shall not be installed through support wire or banding. 4.13.3 The type of inspection port to be used is specified on the drawings or in the project specifications. 4.13.4 Where "Speedcheck" plugs are specified, they shall be installed in all inspection holes cut in the insulation. 4.13.5 Where "V.I.P." inspection ports are specified, they shall be installed in accordance with the MANUFACTURER'S recommendations, Figure

13 of this specification, and the following requirements: a. Inspection ports installed in insulation

where the outside diameter of the insulation is less than 12 inches (305mm) shall be 1 1/2 inches (38mm) in diameter.

b. Inspection ports installed in insulation where the outside diameter of the insulation is 12 inches (305mm) or more shall be 2 1/2 inches (64mm) in diameter.

c. An 'O' ring gasket supplied with the plug shall be applied under the grommet lip before it is inserted into the insulation and when installed shall provide a watertight seal between the grommet and the jacketing.

d. The insulation plug used in the inspection port shall be high temperature, high density Temp‐Mat type fiberglass blanket.

5.0 REUSABLE PAD TYPE INSULATION COVERS

5.1 General 5.1.1 Reusable pad type insulation covers shall be used in the following applications where insulation is required, unless otherwise specified: a. Flanged valves in insulated lines. b. Flanges in insulated lines. c. Piping through the first valve from heat

exchangers, pumps, and turbines, provided the valve is not more than 15 feet (4.6m) from the piece of equipment.

d. Vessel nozzle flanges and nozzle necks up to the permanent insulation.

e. Vessel manways and inspection openings. f. Removable heat exchanger channels,

channel covers, and shell covers. g. Pumps, turbines, and compressors.


5.1.2 Nominal insulation thickness shall be based on the operating temperature of the item to be insulated with an outside cover temperature not to exceed 140�F (60�C) which shall be as follows:

Temperature Thickness �F �C Inches mm

Up to 400 Up to 204 1 25 400‐500 204‐260 2 51 500‐600 260‐316 2 1/2 64 600‐800 316‐427 3 1/2 90 800‐900 427‐482 4 102 5.1.3 Covers may be either field or shop fabricated. 5.1.4 Shop‐fabricated covers shall be boxed and shipped with the identification tag information (see paragraph 5.4 of this specification) legibly printed on each box. 5.1.5 The cover FABRICATOR shall provide an installation drawing for large covers which consist of multiple pieces. Each cover piece shall be labeled with a piece number on the installation drawing, and the piece number shall be included on the cover identification tag. Installation drawings are not required with flange and valve covers unless specifically requested for replacement purposes. 5.2 Materials 5.2.1 Insulation shall be a flexible fibrous glass insulation manufactured in mat form and containing no binders. Material to be Insulbatte/Tempmat by JPS Glass Fabrics Div., or COMPANY approved equal. 5.2.2 The outer fabric shall be a PTFE‐coated fiberglass cloth, approximately 16 oz./yd. sq. Material to be Textiles Coated, Inc. EJ1650 or COMPANY approved equal.

5.2.3 The inner lining for operating temperatures up to 600�F (316�C) shall be the same as the outer fabric. The inner lining for operating temperatures over 600�F (316�C) shall be high temperature glass cloth (18 oz./yd. sq.) impregnated with vermiculite, Textiles Coated Inc., Pyro‐Jac 1800 or COMPANY approved equal. 5.2.4 Lacing anchors shall be 12 gauge (2.66mm) thick, 1 1/2 by 3/16 inch (38 by 5mm) lead, Type 304 stainless steel. 5.2.5 For high mechanical abuse areas, a 60 density knitted wire mesh with 0.011 inch (0.28mm) diameter type 304 stainless steel wire shall be required to cover over the other cover finishes. 5.2.6 The covers shall be machine sewn with high temperature thread, Teflon coated for temperature exposure up to 650�F (343�C). Above 650�F (343�F) use stainless steel wire thread, nylon coated. 5.2.7 Tie wire shall be 18 gauge (1.2mm) stainless steel wire. 5.2.8 Velcro strapping may be used to secure the covers, however it shall be stainless steel. 5.3 Design 5.3.1 Covers shall be designed and fabricated in as few pieces as practical. Weight for any one piece shall not exceed 50 pounds (23 kg). 5.3.2 The seams of all covers shall be machine sewn 8 to 10 stitches per inch (25mm). Each seam shall be double stitched. The seams shall be hemmed with no exposed edges. All cover ends shall be gusseted for full insulation thickness. Pillow construction is not acceptable. 5.3.3 All covers exposed to high mechanical abuse shall be completely encapsulated in a covering of type 304 stainless steel, 60 density, 0.011 inch (0.28mm) diameter knitted wire mesh.


5.3.4 Flange and valve covers to be installed in the horizontal position shall have a seam on the bottom side of the cover. If it is not practical to locate a seam on the bottom of the cover, a drain grommet shall be provided. Drain grommets shall also be provided where drip tubes are required by paragraph 4.7.4 of this specification, located such that the drip tube extends through the grommet. 5.3.4.1 Strapping fabricated from the outside cover material and tied with stainless 'D' rings or Velcro is an acceptable method. 5.3.5 All reusable blankets shall be installed with lacing anchors and soft stainless steel wire. Lacing anchors shall be secured to the blanket with self‐locking type 304 stainless steel speed clips, which are 1 inch (25mm) longer than the thickness of the pad. Other types of fasteners may be acceptable with prior COMPANY approval. 5.3.6 The cover insulation shall overlap permanent insulation by the 2 inches (51mm) or the thickness of the insulation. If this is not possible then flaps 2 inches (51mm) wide constructed of double layer outside cloth material shall be part of the cover. 5.3.7 Adequate stitching (tucks) with heavy glass thread or other approved means shall be installed through large covers to prevent migration of the insulation inside the cover. A minimum of one stitch per square foot shall be used. 5.3.8 When installed, the cover shall fit snugly on the item to be insulated. Cover edges and seams shall fit together tightly such that no gaps are present. Provide drawstrings at the circumferential ends. 5.4 Identification

5.4.1 A stainless steel tag shall be permanently attached to each separate cover or cover segment. The following information shall be shown in the following format. If the cover is one of several segments of a large cover, the piece number shall be included on the identification tag (see paragraph 5.1.5 of this specification). All information shall be stamped in raised letters. Valves 6"‐ Class 300 Valve Size and Rating 6"‐ HR‐1‐H‐A2‐1 Line Number RE‐028‐8403‐PN‐6‐B Drawing Number Flanges 6" ‐ 300‐lb Flange Size 6‐HR‐1‐H‐A2‐1 Line Number RE‐028‐8403‐PN‐6‐B Drawing Number Equipment X‐126 Equipment Number Channel Head Description 40.5/35.25 Flange Size/Channel Size Nozzles X‐126 Equipment Number Channel Nozzle Descriptions 6"‐ 300 lb RFWN Nozzle Size

6.0 STORAGE TANKS

6.1 Prefabricated insulation panel systems are preferred for insulating storage tanks and shall be used unless prior COMPANY approval is obtained for another insulation system. The materials and installation procedures used shall be subject to COMPANY approval. 6.1.1 Acceptable material suppliers are: Thermacon Industries Inc. 345 New Albany Road Morrestown, New Jersey 08057 800‐222‐0773


Iso Panels, Inc. P.O. Box 54173 Pearl, Mississippi 39208 601‐939‐7640 6.2 As an alternate, storage tanks may be insulated in the following manner: 6.2.1 Block or blanket insulation for tanks shall be supported by welded clips at 4 foot (1.22m) vertical intervals about the circumference of the tank. A formed angle fastened to the clips shall completely encircle the tank. The insulation shall be banded on 12 inch (305mm) centers. Refer to Figure 11 of this specification for details. 6.2.2 Roofs on insulated storage tanks requiring fiberglass or mineral wool block insulation shall have built‐up insulation as described below and as shown on Figure 11 of this specification. The system shown on Figure 11 shall be used where welding is permitted on tank roofs. Insulation shall be designed to withstand foot traffic where specified. A high compressive strength insulation, such as calcium silicate, foam glass, or 13‐pound per cubic foot (200 kg per cubic meter) mineral fiber shall be used in this case. a Insulation on deck shall be properly applied

to MANUFACTURER'S specification and be dry and clean .

b. Lay 0.040 inch thick aluminum sheet with 3 mil polyethylene moisture barrier over the insulation and screw to the "Z" bars on 9 inch (229mm) centers.

c. Coat the aluminum sheet with hot asphalt. Asphalt shall be applied at 350�F (177�C) minimum at a rate of 40 pounds per 100 square feet.

d. Final coat the entire surface with 50 pounds per 100 square feet GAF A‐720 mineral shield granules or a COMPANY approved equal.

6.2.3 Other insulation systems may be acceptable with prior COMPANY approval.

7.0 INSPECTION AND QUALITY CONTROL

7.1 COMPANY representatives shall have access to all work while being performed. 7.2 All materials and equipment furnished for this project shall be subject to inspection by COMPANY. 7.3 Material thickness shall have a zero minus tolerance. 7.4 Insulation will be judged defective and rejected for any of the following reasons: a. If there are any cracks or voids extending

through the insulation. b. If there are any cracks which would cause

insulation to break upon sawing or gently flexing.

c. If there are broken or damaged pieces. d. If the jacketing/finish is not watertight. e. If there is any other noncompliance with the

specifications.


TABLE 1 EXPANSION SPRING REQUIREMENTS

NUMBER OF 4‐INCH EXPANSION SPRINGS REQUIRED PER BAND Dia. Operating Temperature F (ft) 10

0 125

150

200

250

300

350

400

450

500

550

600

650

700

750

800

850

900

950

1000

2.0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 2.5 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 3.0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 3.5 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4.0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4.5 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5.0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5.5 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 6.0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 6.5 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 7.0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 7.5 0 0 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 8.0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 9.0 0 0 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 10.0 0 0 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 11.0 0 0 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 3 12.0 0 0 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 3 3 3 13.0 0 0 1 2 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 14.0 0 0 1 2 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 15.0 0 0 1 2 1 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 16.0 0 0 1 2 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 4 17.0 0 0 1 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 4 4 18.0 0 0 1 2 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 19.0 0 0 1 1 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 4 20.0 0 0 1 2 2 2 2 2 2 2 2 3 3 3 3 4 4 4 4 4 24.0 0 1 1 2 2 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 28.0 0 1 1 2 2 2 2 2 3 3 3 4 4 4 4 5 5 5 6 6 32.0 0 1 2 2 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 36.0 0 1 2 2 2 2 3 3 3 4 4 4 5 5 6 6 6 7 7 7 40.0 0 1 2 2 2 2 3 3 4 4 4 5 5 6 6 7 7 7 8 8 50.0 1 1 2 2 2 3 3 4 4 5 5 6 6 7 7 8 9 9 10 10 60.0 1 1 2 2 3 3 4 5 5 6 6 7 8 8 9 10 10 11 11 12 70.0 1 1 2 2 3 4 5 5 6 7 7 8 9 10 10 11 12 12 13 14 80.0 1 1 2 3 3 4 5 6 7 8 8 9 10 11 12 13 13 14 15 16 90.0 1 2 2 3 4 5 6 7 8 8 9 10 11 12 13 14 15 16 17 18 100.0 1 2 2 3 4 5 6 7 8 9 10 11 12 13 14 16 17 18 19 20 110.0 1 2 2 3 5 6 7 8 9 10 11 12 14 15 16 17 18 19 20 22 120.0 1 2 2 4 5 6 7 9 10 11 12 14 15 16 17 19 20 21 22 23 130.0 1 2 3 4 5 7 8 9 11 12 13 15 16 17 19 20 21 23 24 25


140.0 1 2 3 4 6 7 9 10 11 13 14 16 17 19 20 22 23 24 26 27 150.0 1 2 3 5 6 8 9 11 12 14 15 17 18 20 21 23 25 26 28 29 160.0 1 2 3 5 6 8 10 11 13 15 16 18 20 21 23 25 26 28 29 31 170.0 2 2 3 5 7 9 10 12 14 16 17 19 21 23 24 26 28 30 31 33 180.0 2 3 3 5 7 9 11 13 15 16 18 20 22 24 26 28 29 31 33 35 190.0 2 3 4 6 8 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 200.0 2 3 4 6 8 10 12 14 16 18 20 22 24 26 28 31 33 35 37 39 Notes:

(see next page)

Notes: 1. This table is applicable to 4‐inch‐long expansion springs and the Super Mity‐Springs. 2. For intermediate temperatures or diameters, install the number of springs required for the next higher

temperature or larger diameter. 3. 1 inch equals 25.4 millimeters.


Figure 1a PIPE INSULATION DETAILS

NOTES 1. ALL COVERING SHALL HAVE A MINIMUM END AND SIDE LAP OF 3 INCHES. 2. 1 INCH EQUALS 25.4 MILLIMETERS.


Figure 1b PIPE INSULATION DETAILS



Figure 1c PIPE INSULATION DETAILS




NOTES 1. ALL VERTICAL INSULATED LINES SHALL BE SUPPORTED AT BOTTOM AND AT APPROXIMATELY 20‐FOOT

INTERVALS. SEE SPECIFICATION.


Figure 2d PIPE INSULATION DETAILS





NOTES 1. PREMOLDED INSULATION AND JACKETING SHALL BE USED ON FITTINGS WHEREVER POSSIBLE. 2. 1 INCH EQUALS 25.4 MILLIMETERS.


Figure 3d PIPE INSULATION DETAILS



Figure 3e PIPE INSULATION DETAILS



Figure 4a INSULATION DETAILS FOR VERTICAL VESSELS

2‐FOOT 6‐INCH DIAMETER AND UNDER

NOTES 1. PROVIDE BOLTED SUPPORT RINGS FOR INSULATION EVERY 12 FEET. 2. THE INSULATION DETAILS FOR VESSELS OVER 2 FEET ‐ 6 INCHES DIAMETER MAY BE USED AS

ALTERNATE DETAILS FOR SMALLER VESSELS.


Figure 4b INSULATION DETAILS FOR VERTICAL VESSELS





Figure 4c INSULATION DETAILS FOR VERTICAL VESSELS





Figure 5a INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLANKET INSULATION


Figure 5b INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLANKET INSULATION


Figure 5c INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLANKET INSULATION


Figure 5d INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLANKET INSULATION


Figure 5e INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLANKET INSULATION


Figure 6a INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLOCK INSULATION


Figure 6b INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLOCK INSULATION


Figure 6c INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLOCK INSULATION


Figure 6d INSULATION DETAILS FOR VERTICAL VESSELS OVER 2‐FOOT 6‐INCH DIAMETER‐BLOCK INSULATION


Figure 7a INSULATION DETAILS FOR VERTICAL VESSELS LARGER THAN 2‐FOOT 6‐INCH DIAMETER

NOTES 1. THE INSULATION DETAILS FOR VESSELS LARGER THAN 2 FEET ‐ 6 INCHES DIAMETER MAY ALSO BE USED

AS ALTERNATIVE DETAILS FOR SMALLER VESSELS. 2. 1 INCH EQUALS 25.4 MILLIMETERS.


Figure 7b INSULATION DETAILS FOR VERTICAL VESSELS LARGER THAN 2‐FOOT 6‐INCH DIAMETER




Figure 7c INSULATION DETAILS FOR VERTICAL VESSELS LARGER THAN 2‐FOOT 6‐INCH DIAMETER




Figure 7d INSULATION DETAILS FOR VERTICAL VESSELS LARGER THAN 2‐FOOT 6‐INCH DIAMETER




Figure 8a INSULATION DETAILS FOR HEAT EXCHANGERS

SHELL AND TUBE

NOTES 1. APPLY BLANKET INSULATION WITH JOINTS STAGGERED AND LACED TOGETHER WITH WIRE. 2. STAGGER MOLDED PIPE INSULATION AS SHOWN ON FIGURE 1. 3. PREMOLDED PIPE INSULATION IS PREFERRED FOR ALL TUBULAR EXCHANGERS WHERE REQUIRED SIZES

ARE AVAILABLE. 4. FILL ALL JOINTS AND CRACKS WITH INSULATING CEMENT. 5. 1 INCH EQUALS 25.4 MILLIMETERS.


Figure 8b INSULATION DETAILS FOR HEAT EXCHANGERS

SHELL AND TUBE

NOTES 1. APPLY BLANKET INSULATION WITH JOINTS STAGGERED AND LACED TOGETHER WITH WIRE. 2. STAGGER MOLDED PIPE INSULATION AS SHOWN ON FIGURE 1. 3. PREMOLDED PIPE INSULATION IS PREFERRED FOR ALL TUBULAR EXCHANGERS WHERE REQUIRED SIZES

ARE AVAILABLE. 4. FILL ALL JOINTS AND CRACKS WITH INSULATING CEMENT. 5. 1 INCH EQUALS 25.4 MILLIMETERS.



REBOILERS

NOTES 1. ENDS OF INSULATION SHALL BE AS SHOWN ON FIGURE B. 2. 1 INCH EQUALS 25.4 MILLIMETERS.



STEAM TURBINES


Figure 11a INSULATION DETAILS FOR TANKS

NOTES 1. PREFABRICATED PANEL SYSTEMS ARE PREFERRED FOR STORAGE TANKS.


Figure 11b INSULATION DETAILS FOR TANKS



Figure 11c INSULATION DETAILS FOR TANKS



Figure 11d INSULATION DETAILS FOR TANKS

NOTES: 1. PREFABRICATED PANEL SYSTEMS ARE PREFERRED FOR STORAGE TANKS.


Figure 12 ULTRASONIC THICKNESS MONITORING LOCATIONS FOR INSULATED PROCESS PIPING


Figure 13 V.I.P. ULTRASONIC INSPECTION PORT

1. USE 1 1/2 DIAMETER INSPECTION PORTS FOR INSULATION OUTSIDE DIAMETERS LESS THAN 12’. USE 2

1/2 DIAMETER INSPECTION PORTS FOR INSULATION OUTSIDE DIAMETERS OF 12’ OR MORE.

specification for hot insulation · 2019-01-24 · specification for hot insulation 4 of 55 3.2...

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