ISO-HT Specifications (3-Part CSI Format)

POLYISO RIGID FOAM PIPE INSULATION, MECHANICAL INSULATION

Division 7 Thermal and Moisture Protection
SECTION 15080: Mechanical Insulation (1995 MasterFormat)

** NOTE TO SPECIFIER ** Dyplast Products is a leading manufacturer and supplier of polyisocyanurate pipe insulation and mechanical insulation. ISO-HT™ is suitable for piping insulation and mechanical insulation applications up to 350°F (with intermittent exposure to 375°F), including hot water pipe insulation and low temperature steam pipe insulation. Available in bun, block, structural insulated panel, composite panel and custom shapes for building, piping, mechanical equipment, and tank applications. ISO-HT has a Class 1 flame spread/smoke development rating, and the superior insulating efficiency (K-factor).

Dyplast Products, LLC.
12501 NW 38th Avenue
Miami, Florida 33054
Phone: (800) 433-5551 or (305) 921-0100
Fax: (305) 687-8013
E-mail: insulation@dyplast.info
Internet: www.dyplastproducts.com
for additional information.

Dyplast Products manufactures and supplies high performance polyiso insulation ideal for low temperature pipe insulation and mechanical insulation applications, can meet Class 1 fire/smoke ratings (per ASTM E84) flame/smoke criteria, and is viable in green and sustainable building designs.

PART 1 GENERAL

1.1 SECTION INCLUDES

** NOTE TO SPECIFIER ** Delete any paragraphs in this document not applicable to project.

A. This specification includes requirements for polyisocyanurate (polyiso) pipe and certain equipment insulation systems for applications where operating temperatures are between -297°F and +350°F (up to 375°F intermittent) and where high thermal efficiency is desirable.

B. Polyisocyanurate insulation for duct applications, large vessels, and tanks may require

** NOTE TO SPECIFIER ** Insulation design and performance requirements must be tailored to system conditions. View the ISO Specification and Installation Instructions at www.dyplastproducts.com for details on insulation design for different environments, including:

    • Cold Pipe –100°F to + 70°F (-73°C to + 21°C)
    • Indoor and Non-Abuse Pipe Insulation System 0°F to + 350°F (-18°C to +177°C)
    • Warm and Hot Pipe +70°F to 350°F (+21°C to +177°C)
    • Cold Equipment –100°F to +70°F (- 73°C to +21°C)
    • Warm and Hot Equipment +70°F to 350°F (+21°C to +177°C)
    • Process Duct Insulation System 0°F to +350°F (-18°C to +177°C)
    • For operating temperatures below – 100°F (-73°C) contact Dyplast Products since special design applications may be required.

1.2 RELATED CSI SECTIONS

** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others as required.

  Master Format 1995 MasterFormat 2004
A. Section 07210 Plastic Insulation - 07 2120
B. Section 07260 - Vapor Retarders Vapor Retarders - 07 2600
C. Section 15080 - Mechanical Insulation HVAC Insulation (General) - 23 0700
D. Section 15080 - Mechanical Insulation HVAC Duct Insulation - 23 0713
F. Section 15080 - Mechanical Insulation HVAC Pipe Insulation - 23 0719

 

1.3 REFERENCES

** NOTE TO SPECIFIER ** Delete references from the list below that are not required by the text of the edited section; add others as required.

A. ASTM C 203 Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation

B. ASTM C 209 Water Absorption (D 2842: 96-hour immersion; C272: 24-hour immersion)

C. ASTM C 272 Test Method for determining water absorption via 24 hour immersion

D. ASTM C 273 Test method for determining shear strength

E. ASTM C 355 Water Vapor Transmission

F. ASTM C 518 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus

G. ASTM C 591 Standard Specification for Unfaced Preformed Rigid Cellular Polyurethane Thermal Insulation. Covers unfaced, preformed rigid cellular polyisocyanurate plastic material intended for use at temperatures up to 375°F. Replaces federal specification HH-I-53

H. ASTM C 871-00 Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions

I. ASTM C 921 Standard Practice for Determining the Properties of Jacketing Material for Thermal Insulation

J. ASTM 1136 Standard for vapor retarders

K. ASTM D 1621 Test Method for Compressive Properties of Rigid Cellular Plastics

L. ASTM D 1622 Test Method for Apparent Density of Rigid Cellular Plastics

M. ASTM D 1623 Test Method for Tensile Strength

N. ASTM D 2126 Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging

O. ASTM D 2842 Test Method for Water Absorption (96-hour immersion)

P. ASTM D 2856 Test Method for Open Cell Content of Rigid Cellular Plastics By the Air Pycnometer

Q. ASTM E 84 (UL 723) Test method for Surface Burning Characteristics of Building Materials

R. ASTM E 96 Test Method for Water Vapor Transmission of Materials

1.4 SYSTEM DESCRIPTION

A. Design requirements: Provide polyisocyanurate bunstock fabricated to specified dimensions and tolerances for application to pipe, fittings, and equipment, meeting the following additional criteria:

** NOTE TO SPECIFIER ** The International Mechanical Code as well as numerous State and local codes require particular standards for surface burning characteristics as determined by ASTM E84. Additionally many large engineering, design and construction firms impose their own standards for fire spread/smoke development consistent with their own stringent safety policies or for insurance advantages. As the polyiso industry phases out CFC and HCFC blowing agents and converts to hydrocarbon or other blowing agents, fire/smoke ratings on branded products may change, warranting special attention to the validity ratings in "old" product data sheets.

1. Surface burning characteristics (ASTM E84): Class 1 fire spread/smoke development [Note: Or specify other less conservative criteria]

2. Polyisocyanurate insulation shall not be produced with, or contain, any of the United States EPA regulated CFC compounds listed in the Montreal Protocol of the United Nations Environmental Program.

** NOTE TO SPECIFIER ** Specifying higher compressive strengths requires increased polyiso density, and each density has a corresponding set of physical properties. Flame spread/smoke development ratings, for example, generally deteriorate as density increases. Each polyiso bun manufacturer has standard density products, nominally 2, 3, 4, and 6 lb/ft3, although other densities are available. Optimization of cost and physical properties is typically best achieved by specifying the polyiso product with the lowest density that has the minimum acceptable physical properties that are important for the facility, such as compressive strength, flexural strength, fire/smoke rating, and/or R-value.

3. Compressive strength: 39 lb/in2 or greater (parallel).

4. K-factor of polyiso (aged): 0.178 BTU*in/hr*ft2*F or less

5. Water absorption: < 1% by volume

6. Water vapor permeance: <2 perm-in or less

7. Service temperature: -297°F to +350°F (up to 375°F intermittent)

8. Fabrication tolerances: 1/16 inch

9. Insulation thickness:

** NOTE TO SPECIFIER ** Select one of the following three paragraphs, delete other paragraphs.

a. As indicated on the drawings.

b. Construction contractor calculate insulation thickness based on required R-values.

c. Insulation thickness: _______________

1.5 SUBMITTALS

A. Submit under provisions of Section 01300

B. Manufacturer's technical data, details, and specifications giving information on material composition and physical properties of the insulation, vapor retarders, and jacketing, if used. Also include:

1. Preparation instructions and recommendations.

2. Storage and handling requirements and recommendations.

3. Manufacturer/supplier installation instructions or methods.

** NOTE TO SPECIFIER ** The polyisocyanurate insulation industry has been forced to alter its product and manufacturing processes to eliminate the original CFC and HCFC blowing agents, and certain physical properties may vary as new blowing agents are used. Specifiers and contractors should be pro-active in protecting themselves from installing polyiso insulations that may not meet the advertised fire/smoke properties.

C. Manufacturer's Certificate: Certify stated R-values (aged) and flame spread/smoke development ratings are in accordance with laboratory testing from certified laboratories.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials in manufacturer's original, unopened, undamaged containers with shipping labels intact. The manufacturer's plastic wrapping is provided for protection during shipment only. Replace insulation that is damaged by physical abuse or water.

B. Store products off the ground, in dry conditions, under cover and in manufacturer's unopened packaging until ready for installation.

C. Consider flexural strength and friability characteristics of alternative polyiso manufacturers to minimize breakage during handling and to minimize dust while cutting and abrasion to hands when handling.

1.7 PROJECT CONDITIONS

A. Maintain environmental conditions within the limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

B. Maintain ambient conditions required by manufacturers of adhesives, vapor retarders, sealants, etc.

PART 2 PRODUCTS

2.1 MATERIALS

** NOTE TO SPECIFIER ** Specifics of the insulation installation process and the practices of the insulation contractor will determine the accessory equipment required. For a complete listing of possible accessories and recommended manufacturers and suppliers, see ISO-HT Specification and Installation procedure at www.dyplastproducts.com.

A. Insulation: Rigid closed-cell polyisocyanurate thermal insulation bunstock, fabricated into shapes required to insulate pipe, valves, fittings, vessels, and/or special shapes. Density and physical properties are as specified in the Equipment Sections below. Polyiso material shall not be produced with, or contain, any of the United States EPA regulated CFC compounds listed in the Montreal Protocol of the United Nations Environmental Program.

B. Vapor Retarder: Even though polyisocyanurate has excellent water vapor permeance, an additional vapor retarder is recommended and can improve thermal efficiency, water penetration characteristics, and fire spread and smoke development attributes. Vapor retarders may consist of sheet-type film, such as cross-laminated high density polyethylene sheeting, polyvinylidene chloride polymer film, or similar materials. (Vapor retarder sheets may require matching tape if not self-adhering.)

C. Tape: Polyiso insulation is secured to the pipe with filament-reinforced tape, such as the synthetic filament-reinforced polyester film backing tape with non-thermosetting rubber adhesive, wrapped on a 3 inch paper core manufactured by 3M.

** NOTE TO SPECIFIER ** Construction and operational circumstances must be considered when specifying all service jackets (ASJ) since they are easily damaged. All service jackets (ASJ) must be handled carefully in order to avoid compromising integrity of the insulation system.

D. Outer surface finish: A finish with a high emissivity such as painted metal, PVC or All Service Jacket (ASJ) is recommended.

E Non-setting joint sealer.

** NOTE TO SPECIFIER ** Dow Chemical Saran Wrap and Tape data sheets indicate their process eliminates the need for mastic-fab-mastic.

F. Vapor retarder mastic: (use with an open weave glass fiber reinforcing cloth between the coats)

G. Smooth aluminum rolled jacketing, To ASTM B2089, 0.016 inch thick. 

1. Childers 16-mil aluminum roll jacketing

2. RPR 16-mil aluminum roll jacketing

3. Pabco 16-mil aluminum roll jacketing

H. Deep Corrugated (1 ¼ inch) Aluminum Sheeting, To ASTM B209, 0.024 inch thick. 

1. Childers, 24-mil Deep Corrugated Aluminum Sheets

2. RPR, 24-mil Deep Corrugated Aluminum Sheets

3. Pabco, 24-mil Deep Corrugated Aluminum Sheets

I. Smooth stainless steel rolled jacketing, To ASTM A-240, 0.010 inch thick with standard moisture barrier backing.

1. Childers, 10-mil stainless steel rolled jacketing

2. RPR, 10-mil stainless steel rolled jacketing

3. Pabco, 10-mil stainless steel rolled jacketing

J. Smooth Stainless Steel Rolled Jacketing, To ASTM A-240, 0.016 inch thick with standard moisture barrier.

1. Childers, 16-mil stainless steel rolled jacketing

2. RPR, 16-mil stainless steel rolled jacketing

3. Pabco, 16-mil stainless steel rolled jacketing

K. Deep Corrugated (1 ¼ inch) Stainless Steel Sheeting, To ASTM A-240, 0.010 inch thick with standard moisture barrier.

1. Childers, 10-mil Corrugated Stainless Steel Sheeting

2. RPR, 10-mil Deep Corrugated Stainless Steel Sheeting

3. Pabco, 10-mil Deep Corrugated Stainless Steel Sheeting

L. Aluminum Covers For Vessel Heads, Fabricated Gores, 0.020 inch thick, Specify Plain or Acrylic Coated. 

1. Childers, Aluminum Gore Head-Jacs

2. RPR, Aluminum Gore Head Jacket

M. Aluminum Two-piece Die-Formed 45 and 90 Ell Covers. Specify plain, acrylic or tedlar coated.

1. Childers, Ell-Jac

2. RPR, 2-Piece Aluminum Elbow Covers

3. Pabco, Sure-Fit Elbow Covers

N. Stainless Steel Two-Piece Die-Formed 45 and 90 Ell Covers.

1. Childers, Stainless Steel Univers Ell-Jacs

2. RPR,2-Piece Stainless Steel Elbow Covers (Top)

O. Vapor Retarder Mastics and Coatings - Indoor

1. Childers Chil-Perm CP-30, CP-32 (non-flammable)

2. Marathon Lo Perm 590, 591

3. Fosters Vapor-Fas 30-15

P. Vapor Retarder Mastics and Coatings – Indoor/Outdoor

1. Childers Encacel V, X, Chil-Perm WB CP-35

2. Fosters Monolar 60-39, 60-59

3. Fosters Vapor-Safe Mastic 30-90

Q. Vapor Retarder Membrane

1. Polyguard Products, inc. Insulrap 30, Insulrap 50

2. Alpha Associates Inc. Alpha-Alaflex Style 13 MAM

3. TGH-1000 VB

R. Insulation Joint Non-Setting Sealer

1. Fosters Foamseal 30-45

2. Childers CP-70

3. Epolux Cadaseal 745

S. Insulation Adhesive For Adhesion To Itself and To The Substrate.

1. Fosters Fire Resistant Adhesive 81-33 or Kold-Fas 82-08

2. Childers Chil-Rene CP-96

T. Open-Weave Glass Cloth, 10x10/in.sq. min.

1. J.P. Stevens, Glass Cloth, Style 1659/Geon

2. Burlington , Resin Treated Style 1659

3. Childers, No. 10 Chil-Glas

U. ASJ Kraft Aluminum Laminate-White

1. Alpha, Alpha-Temp 10651 ASJ

2. Compac, FB200 ASJ

V. Breather Acrylic Type Mastic

1. L&L Coatings, L&L 300 Mastic-White

2. Childers, Vi-Cryl CP-11

3. Fosters, Weatherite Mastic 36-10, 46-10

W. Caulking Sealant, Silicone Rubber Compound

1. Dow Corning, Silastic 732 RTV, 999 RTV

2. Rhone-Poulene, Rhodorsil 3B-2542 (Aluminum)

3. Pecora, 863 Silicone Sealant 345 (White)

X. Stainless Steel Bands and Seals. Type 430, 304 acceptable. ½ or ¾ inch widths x 0.020 inch thickness. Available from insulation distributors

Y. Stainless Steel Bands and Seals, 1 ¼ inch wide

1. Childers, 1 ¼ inch Stainless Steel Bands and seals

2. A.J.Gerrard, 1 ¼ inch Stainless Steel Bands and Seals

Z. Stainless Steel 4 inch Expansion Springs

1. A.J. Gerrard, 4 in. Breather Spring

2. Childers, Chil-Spring 4 in.

AA. Heavy Duty Stainless Steel Compression Springs

1. Childers, Super-Mity-Springs

BB. Polyester Film Tape, Pressure-Sensitive Glass Reinforced, ½ inch wide

1. 3M Co., Scotchbrand No.898 Polyester Tape

CC. ASJ Pressure Sensitive Tape, 3 inches wide

1. Compac, Perm Tape ASJ Std 105-7

2. Venture, 1540 CW ASJ

DD. Foil (2-mil) Pressure Sensitive Tape, 3 inches wide

1. Compac, Perm Tape Foil Std 120-6

2. Venture, 1520 CW Foil

EE. Tedlar Pressure Sensitive Tape, 2 inch wide

1. Alpha, Avalock Style 209TG (Gray), Style 209 TW (White)

FF. Table of accessory materials:

Application Finish  Remarks
Pipe        0.016 inch thick plain, smooth, rolled Aluminum jacket                                                   Indoor/Outdoor, non-corrosive; Moderate mechanical abuse
Pipe 0.016 inch thick white acrylic coated, smooth, rolled aluminum jacket                                        Indoor/Outdoor, mild corrosion; Moderate mechanical abuse
Pipe 0.020 inch thick white, smooth, rolled PVC Jacket Indoor, mild corrosion; Low mechanical abuse
Pipe        0.030 inch thick white, smooth, rolled PVC Jacket Indoor/Outdoor, mild corrosion; Moderate mechanical abuse
Pipe 0.010 inch thick smooth, rolled stainless steel Jacket Indoor/Outdoor, severe corrosion; High mechanical abuse
Pipe        0.010 inch thick tedlar, glass, hypalon rolled Laminate jacketing Indoor/Outdoor, severe corrosion; High mechanical abuse
Pipe 0.016 inch thick white tedlar coated, smooth, Rolled aluminum jacket Indoor/Outdoor, severe corrosion; Moderate mechanical abuse
Equipment 0.016 inch thick plain, smooth, rolled Aluminum jacket Indoor, non-corrosive; Moderate mechanical abuse
Equipment 0.016 inch thick white acrylic coated, smooth, Rolled aluminum jacket Indoor, mild corrosion; Moderate mechanical abuse
Equipment 0.030 inch thick white, smooth, rolled PVC Jacket Indoor, mild corrosion; Moderate mechanical abuse
Equipment 0.024 inch thick deep corrugated, plain Aluminum sheets Outdoor, non-corrosive; Moderate mechanical abuse
Equipment 0.024 inch thick white acrylic coated, deep Corrugated aluminum sheets Outdoor, mild corrosion; Moderate mechanical abuse
Equipment 0.016 inch thick smooth, rolled stainless steel Jacket Indoor/Outdoor, severe corrosion; High mechanical abuse
Equipment 0.010 inch thick deep corrugated, stainless Steel jacket Outdoor, severe corrosion; High mechanical abuse
Ducts Scrim reinforced, acrylic mastic system Indoor, non-corrosive; Low mechanical abuse
Ducts 0.016 inch thick plain, smooth, rolled Aluminum jacket Indoor/Outdoor, non-corrosive; Moderate mechanical abuse
Ducts       0.016 inch thick white acrylic coated, smooth, Rolled aluminum jacket Indoor/Outdoor, mild corrosion; Moderate mechanical abuse
Irregular shapes   Scrim reinforced, acrylic mastic system Indoor, non-corrosive; Low mechanical abuse
Irregular shapes   Scrim reinforced, hypalon-type mastic vapor Retarder system Indoor/Outdoor, mild corrosion; Low mechanical abuse


2.2 MANUFACTURERS

** NOTE TO SPECIFIER ** For information on dP-ISO products, including ISO-HT, their physical, chemical, and dimensional attributes refer to www.dyplastproducts.com, or contact Dyplast Products directly.

A. Acceptable Manufacturer of Insulation: Polyisocyanurate pipe and equipment insulation shall be dP-ISO produced by Dyplast Products, LLC., 12501 NW 38th Avenue, Miami, Florida 33054. Phone: (800) 433-5551 or (305) 921-0100. Fax: (305) 687-8013. E-mail: insulation@dyplast.info

** NOTE TO SPECIFIER ** Only Dyplast Products, Dow Chemical Company, Elliott Company, and Duna USA, Inc. manufacture polyiso foam bunstock. Each product has varying Physical Properties and laboratory testing accreditations. Engineers and specifies should carefully evaluate Physical Properties to ensure compliance with specifications, with particular attention to R-value, Strength, Water Vapor Permeance, and Flame Spread and Smoke Development Ratings.

B. Requests for substitutions will be considered in accordance with provisions of Section 01600.

C. Acceptable Manufacturers of Vapor Retarders: Cross-laminated high density polyethylene sheeting such as Polyguard Insulrap, or polyvinylidene chloride polymer film such as Dow Saran, or equivalent. All-service jackets (ASJ) provide a lower quality of vapor barrier and should be specified only in less demanding environments.

** NOTE TO SPECIFIER ** PVC jackets improve the long term resistance to moisture penetration, thereby extending the longevity of the insulation system. PVC jackets also improve resistance to abuse and aid fire spread and/or smoke development attributes.

D. Acceptable Manufacturers of PVC Jackets: Proto Corporation, Johns Manville (Ceel-Co and Zeston), Childers Products Company Ltd., Sure-Fit System, Speedline, and Thermo-Cover Inc.

E. Requests for substitutions of PVC jacket manufacturers will be considered in accordance with provisions of Section 01600.

F. Acceptable Manufacturers of All Service Jackets (ASJ), Metal Jacketing and Fitting Covers: Any reputable manufacturer qualified by the engineer or specifier.

G Acceptable Manufacturers of Vapor Retarder Mastics include Foster Products' VAPOR-SAFE® Mastic, or equivalent.

2.3 PIPE INSULATION

** NOTE TO SPECIFIER ** Piping and vessel systems that require polyisocyanurate insulation may include industrial or commercial cold water, chilled water, refrigerant, refrigeration, liquid natural gas, liquid oxygen, liquid hydrogen, and other cryogenic fluids or low-temperature applications. Two-pound density polyiso is preferable over higher densities due to lower cost, but higher densities may be appropriate for locations where insulation may be subject to substantial abuse. Vapor retarders should be utilized in the vast majority of installations. PVC or metal jacketing should be specified at the discretion of the designer/engineer for protection of the vapor retarder, particularly in high-abuse areas, or the decision can be left to the discretion of the construction contractor.

** NOTE TO SPECIFIER ** Paragraphs A – D below list the nominal densities normally suitable in pipe insulation applications. The following paragraphs delineate the physical properties of Dyplast Products' ISO line of products. For comparison with other polyiso bunstock alternatives see the Comparison Chart at www.dyplastproducts.com. Delete the following paragraphs that refer to polyiso product densities that are not specified for this project.

A. 2.5 lb/ft3 Density Polyiso (ISO-HT/2.5: Physical properties:

1. Compressive Strength: minimum 37 psi (255 kPa) Parallel to Rise (thickness)

2. Dimensional Stability: <0.1 percent linear change (7 days) at -30 degrees F; and <0.2 percent linear change (7 days) a 212 degrees F.

3. Water Vapor Permeance: less than or equal to 2.23 perm-inch (3.25 ng/(Pa*s*m)).

4. Water Absorption: not to exceed 0.1 percent by volume; C272

5. Flame Spread: not to exceed 25 for thicknesses up to 4 inches

6. Smoke Development: not to exceed 160 for thicknesses up to 4 inches (100 mm)

7. Service Temperature: -297 degrees to 350 degrees F (-183 degrees C to +177 degrees C), with intermittent operation acceptable up to 375F (190C).

8. K-value: maximum 0.18 BTU*in/hr*ft2*F after 6 months aging.

** NOTE TO SPECIFIER ** Polyiso insulation thickness in low temperature pipe applications must be adequate to reduce condensation to acceptable levels and achieve process design efficiencies, and must consider Ambient Temperature, Ambient Relative Humidity, Dewpoint, Outer Surface metal, Wind Velocity, Geometry, and R-value of selected insulation. In certain situations the insulation thickness required to achieve the requisite R-value may not have the inherent fire or smoke rating that is required. In such cases, the entire system fire and/or smoke rating must be determined, considering vapor retarder, jacketing, sprinkler systems, and so forth. Alternative approaches include rerouting of piping to reduced fire/smoke requirements, or the use of supplemental insulation with the required fire/smoke rating to supplement the R-value. Use of cellular glass should be minimized due to short and long-term cost implications and handling. Dyplast Product's ISO line of products generally provide the highest fire and smoke ratings for given thicknesses of polyiso insulation.

B Insulation thickness:

** NOTE TO SPECIFIER ** Select one of the following three paragraphs, delete other paragraphs.

1. As indicated on the drawings.

2. Construction contractor calculate insulation thickness based on required R-values.

3. Insulation thickness: _______________

2.4 ACCESSORIES FOR PIPE INSULATION

** NOTE TO SPECIFIER ** For more detailed information on accessories required for installation, visit the ISO installation section of www.dyplastproducts.com.

A. Install a vapor retarder as specified in Materials Section over pipe insulation, rather than applying a mastic system. The sheet material usually has a better perm rating, improves continuity and is easier to apply. Install vapor retarders in accordance with instructions provided below and by manufacturer.

B. Finish insulation as required on drawings, and in exposed outdoor areas, in mechanical rooms and in high traffic areas with the following jacketing, unless otherwise indicated on drawings. Install jacketing in accordance with instructions provided below and by manufacturer.

1. Jacket: PVC jacketing and fitting covers

2. Where PVC jacketing can not be used, use specified metal jacketing and fitting covers.

C. Do not use PVC jacketing where exposed to direct sunlight and insulation is more than 20 inches (510 cm) in outside diameter, or where insulation thickness is not adequate to ensure that the surface temperature of PVC does not exceed 125 degrees F (51 degrees C).

2.5 EQUIPMENT INSULATION

** NOTE TO SPECIFIER ** Equipment that might be insulated using polyisocyanurate insulation includes tanks, vessels, piping components, or other components in systems that operate between -297 degrees F and +300 degrees F. Such systems include industrial or commercial cold water, chilled water, refrigerant, refrigeration, liquid natural gas, liquid oxygen, liquid hydrogen, and other cryogenic fluids or low-temperature applications. Two-pound density polyiso is preferable over higher densities due to lower cost, but higher densities may be appropriate for locations where insulation may be subject to substantial abuse. Vapor retarders should be utilized in the vast majority of installations. PVC or metal jacketing should be specified at the discretion of the designer/engineer for protection of the vapor retarder, particularly in high-abuse areas, or the decision can be left to the discretion of the construction contractor.

** NOTE TO SPECIFIER ** Paragraphs A – D below list the nominal densities normally suitable in equipment insulation applications. The following paragraphs delineate the physical properties of Dyplast Products' ISO line of products. For comparison with other polyiso bunstock alternatives see the Comparison Chart at www.dyplastproducts.com. Delete the following paragraphs that refer to polyiso product densities that are not specified for this project.

A. 2.5 lb/ft3 Density Polyiso (ISO-HT/2.5: Physical properties:

1. Compressive Strength: minimum 39 psi (255 kPa) Parallel to Rise (thickness)

2. Dimensional Stability: <0.1 percent linear change (7 days) at -30 degrees F; and <0.2 percent linear change (7 days) a 212 degrees F.

3. Water Vapor Permeance: less than or equal to <2 perm-inch (3.25 ng/(Pa*s*m)).

4. Water Absorption: not to exceed 2 percent by volume; C272

5. Flame Spread: not to exceed 25 for thicknesses up to 4 inches

6. Smoke Development: not to exceed 160 for thicknesses up to 4 inches (100 mm)

7. Service Temperature: -297 degrees to 350 degrees F (-183 degrees C to +177 degrees C), with intermittent operation acceptable up to 275F (190C).

8. K-value: maximum 0.16 BTU*in/hr*ft2*F after 6 months aging.

B. Insulation thickness:

** NOTE TO SPECIFIER ** Select one of the following three paragraphs, delete other paragraphs.

1. As indicated on the drawings.

2. Construction contractor calculate insulation thickness based on required R-values.

3. Insulation thickness: _______________

** NOTE TO SPECIFIER ** It is recommended that all equipment and vessels 24 inches in diameter and less, operating at 0°F (-18°C) and below, have a double layer insulation system.

C. For equipment and vessels greater than 24 inches in diameter, operating below 30°F (-2C), should have a double layer insulation system.

D. ISO-HT foam insulation is available in 4 feet by 8 feet sheets. With insulation thickness up to 1 ½ inch thick, the sheet is flexible enough to be wrapped around a vessel 12 feet in diameter or greater. This application will reduce the number of joints to be sealed and coverage is faster, thus savings in labor.

E. For vessels 24 inches in diameter and less pipe insulation sections should be used.

F. For vessels less than 12 feet in diameter, the longitudinal joints of the ISO-HT blocks shall be beveled to the radius of the vessel to ensure tight fitting joints.

2.6 ACCESSORIES FOR EQUIPMENT INSULATION

** NOTE TO SPECIFIER ** For more detailed information on accessories required for installation, visit the ISO installation section of www.dyplastproducts.com.

A. Non-setting sealers are used to butter all insulation joints.

B. Insulation adhesive is used on flat equipment surfaces to secure the insulation to the substrate.

C. Stainless steel bands and seals a minimum ½ inch wide stainless are used to secure the blocks of insulation on equipment (vessels) 12 feet in diameter and less. For equipment greater than 12 feet use ¾ inch wide stainless steel bands.

D. Reinforced vapor retarder mastic is applied to vessel heads and irregular shapes.

E. ASJ finish vapor retarder is an acceptable vapor retarder for equipment operating at 0°F and above. All seams are sealed with appropriate tape.

F. A protective finish is recommended.

2.7 DUCT INSULATION

A. For square and rectangular ducts, the insulation shall be polyiso boards.

B. For cylindrical ducts up to 24 inches in diameter, use 2-piece pipe sectional polyiso insulation.

2.8 ACCESSORIES FOR DUCT INSULATION

** NOTE TO SPECIFIER ** For more detailed information on accessories required for installation, visit the ISO installation section of www.dyplastproducts.com.

A. Non-setting sealers are used to butter all insulation joints.

B. Insulation adhesive is used on flat equipment surfaces to secure the insulation to the substrate.

C. ASJ finish is recommended.

D. All seams are sealed with appropriate tape.

2.9 FABRICATION

A. Polyisocyanurate insulation for pipe and equipment applications is manufactured as bunstock. Dyplast Products utilizes the latest technologies and equipment to produce bunstock not only with different densities but also different dimensions, from 36' to 48' widths, heights to 36" and virtually any length (commonly 24'). The ability to vary bun sizes allows sizing the bun to closely fit final dimensions of pipe and equipment insulation components, reducing waste during fabrication. Buns are fabricated using only highly qualified fabrication facilities, ensuring close tolerances to reduce rework in the field as well as to ensure tight fit and improved thermal efficiencies. Dyplast Products' ISO line of polyiso has excellent workability characteristics, allowing for cutting to 1/16 inch tolerance or better.

PART 3 EXECUTION

3.1 EXAMINATION

A. Verify that all piping, equipment, and ductwork are tested and approved prior to insulation installation.

B. Verify that all surfaces are clean, dry, and free of foreign material before applying insulation materials.

3.2 INSTALLATION - GENERAL

** NOTE TO SPECIFIER ** For more detailed information on installation, Click Here to link to the installation section of www.dyplastproducts.com.

A. Install in accordance with manufacturer's instructions and applicable building codes.

B. Where R-values are indicated, install in thickness required to achieve R-values; otherwise install to thicknesses required.

C. Install continuously on surfaces to be insulated without gaps to minimize losses in thermal efficiency, as follows:

** NOTE TO SPECIFIER ** Select the appropriate paragraph below and delete the other paragraphs:

1. Overlap layers of insulation so seams are not contiguous.

2. Use shiplap joints.

3. Butt sections firmly.

D. Locate seams in least visible location. Extend surface finishes to protect raw edges, ends and surfaces of insulation.

E Where vapor retarder facing or jacketing is specified, maintain continuous, unbroken moisture and vapor seal; insulate and vapor seal all hangers, supports, anchors, and other projections secured to cold surfaces to prevent condensation; repair penetrations and damage to vapor retarder using joint tape prior to system startup.

3.3 PIPE INSULATION

A. Install pipe insulation continuously through walls, ceiling and floor openings, and sleeves except where firestopping materials are required.

B. Vapor barriers: install vapor barriers as indicated on drawings and in accordance with manufacturer's instructions. Seal all joints, seams and fittings.

C. Insulate fittings and valves with insulation equivalent to that required for adjacent piping; finish with same materials unless otherwise specified.

D. Molded Pipe Insulation:

1. Install metal shields between hangers or supports and piping insulation and install rigid insulation inserts between pipe and the insulation shields.

E. Jacketing: Install jacketing as indicated on drawings and in accordance with manufacturer's instructions. Seal all joints, seams and fittings.

F. Contraction and expansion joints:

1. For cold piping and vessels, contraction joints are not normally required with ISO-HT for operating temperatures above –50°F (-45C). For operating temperatures at – 50°F (-45C) and below and over 48 lineal feet of pipe or vessels over 48 feet long, a contraction joint is recommended every 12 feet.

2. The contraction joints shall be in the inner layer of insulation only. The contraction joint space shall be 1 inch wide and packed with glass fiber insulation. The glass fibers shall be oriented perpendicular to the pipe or vessel length. Cover the contraction joint with a vapor retarder membrane sheet, overlapping the joint by 2 inches on both sides. Secure the membrane with reinforced tape on the pipe an stainless steel bands.

3. For hot piping and vessels, expansion joints are not normally required with ISO-HT. For the exception see ISO Specification and Installation Instructions at www.dyplastproducts.com

3.4 EQUIPMENT INSULATION

A. Apply insulation with joints firmly butted as close as possible to the equipment surface. Secure insulation as specified in manufacturer's instructions with adhesive or banding material.

B. Overlap vapor retarders and tape as specified in manufacturer's instructions.

C. Equipment Insulation Exposed on Exterior: Position joints so as to shed water.

3.5 DUCT LINER

A. Cover internal duct areas with duct liner.

B. Apply duct lining in strict accordance with the latest edition of SMACNA HVAC Duct Construction Standards and manufacturer's instructions.

1. Butt transverse joints firmly with no gaps and coat with adhesive.

2. Overlap longitudinal corner joints.

3. When air velocity will be 4000 to 6000 feet per minute (1219 to 1829 meters per minute), apply metal nosing to upstream transverse edges to secure the insulation.

C. Adhesive:

1. Apply adhesive to the sheet metal with a 90 percent minimum coverage.

2. Coat exposed edges of the duct liner with the same adhesive.

3. Repair rips and tears using the same adhesive.

3.6 EXTERNAL DUCT INSULATION

A. Install duct insulation continuously through walls, ceiling and floor openings, and sleeves except where firestopping materials or fire or smoke dampers are required.

B. Board Insulation: Secure in place using adhesive and/or mechanical fasteners as indicated in manufacturer's instructions.

3.7 PROTECTION

A. Protect installed products until completion of project.

B. Touch-up, repair or replace damaged products before Substantial Completion.

 

About Dyplast

Dyplast Products offers mechanical insulation solutions for an array of low temperature applications such as LNG insulation, cryogenic insulation, chilled water pipe insulation, refrigeration insulation, and low temperature steam insulation - - and in industries ranging from building construction,, roofing, refrigeration, transportation, petrochemical, pharmaceutical, marine and more.