Section 15250 PIPE AND EQUIPMENT INSULATION

Section 15250

PIPE AND EQUIPMENT INSULATION

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall furnish and install all pipe and equipment insulation, complete and operable, in accordance with the requirements of the Contract Documents. In addition to the insulation shown and specified, the CONTRACTOR shall insulate any cold or hot piping and exhausts that could be hazardous to plant personnel upon contact.

B. All chilled-water piping shall be insulated with fiberglass metal jacketed insulation to form a watertight and weatherproof system.

C. All domestic hot-water piping, cold-water piping, and roof drain/overflow lines that pass through spaces above finished ceilings, or are suspended over equipment, electrical panels, or cabinets shall be insulated.

D. All unions, flanges, mechanical joints, valves, strainers, steam traps, and other devices in insulated piping systems shall be insulated in the same manner as the adjacent piping. Operators, instruments and other features requiring routine access shall not be covered. Insulation over removable devices shall be easily removable and replaceable.

E. Insulation on buried piping need not be jacketed.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. The requirements of the following sections and divisions apply to the Work of this section. Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1. Division 02, Site Work (applicable sections)

2. Section 09800, Protective Coating

3. Division 15, Mechanical (applicable sections)

1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS

A. All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B. Comply with the applicable editions of the following codes, regulations and standards.

1. Industry Standards:

ASTM B 209 Standard Specification for Aluminum and

Aluminum-Alloy Sheet and Plate

ASTM C 547 Standard Specification for Mineral Fiber Pipe

Insulation

ASTM C 553 Standard Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications

ASTM C 592 Standard Specification for Mineral Fiber Blanket Insulation and Blanket-Type Pipe Insulation (Metal-Mesh Covered) (Industrial Type)

ASTM C 612 Standard Specification for Mineral Fiber Block and Board Thermal Insulation

ASTM E 84 Standard Test Method for Surface Burning

Characteristics of Building Materials

C. Comply with the applicable reference Specifications as directed in the General

Requirements and Additional General Requirements.

1.4 CONTRACTOR SUBMITTALS

A. Submittals shall be made in accordance with the General Requirements, Additional

General Requirements and as specified herein.

B. The following submittals and specific information shall be provided.

1. The CONTRACTOR shall submit complete shop drawings of all thermal insulation, with manufacturer's data on materials, covering, jackets, and finish.

1.5 QUALITY ASSURANCE

A. CONTRACTOR Qualifications:

1. Comply with the requirements for the certifications, licenses, training, skills, experience, and other qualifications specified in Article entitled “Installation” of this Specification.

PART 2 - PRODUCTS

2.1 GENERAL

A. All components of the insulation, including covering, mastics, and adhesives shall have a flame spread rating of not over 25, and a smoke development rating of not over

50. Ratings shall be as established by tests in accordance with ASTM E 84 and Federal Specification standards. The integrated insulation assemblies shall also conform to the above specifications. Insulation shall be applied in strict accordance with the manufacturer's instructions.

2.2 BASIC MATERIALS

A. Standard Insulation: This type of insulation shall be employed for process, cold and hot water, steam, and condensate piping and equipment with surface temperatures up to

850 degrees F. Pipe insulation shall be molded-type pipe covering, made of fibrous glass with a minimum k-factor of 0.23 at 75 degrees F, mean temperature. The insulation shall be oversized for installation over electric heating cable. Unless otherwise specified, the insulation thickness shall be as follows:

1. Pipe Insulation:

Minimum Thickness of Insulation

(Inches)

Hot and cold water (domestic) – 1

6 inches and smaller

Chilled water process –

6 inches and smaller 1-1/2

Heated sludge and process piping –

6 inches and smaller 1

8 inches and larger 1-1/2

2. Equipment and Tanks:

Heat exchangers, tanks, and vessels – 3

3. Vapor Barrier: Insulation shall have a factory-applied white fire-retardant vapor- barrier jacket of craft paper and aluminum foil laminated together and reinforced with fiberglass yarn.

4. Insulation at Supports: Insulation shall be coordinated with the pipe hangers and supports and where insulation protection shields are provided the top half section of pipe insulation at support locations shall be of the same specified density, and the bottom half insulation segments provided between the pipe and the insulation protection shields shall have a density of not less than 6 lb/cu ft.

5. Manufacturers, Or Equal:

a. Johns Manville, Micro-Lok.

b. Owens Corning Insulating Systems, FlexWrap.

2.3 METAL JACKETING

A. General: All insulation shall be covered with smooth aluminum weatherproof jacketing with a factory-attached moisture barrier.

B. The jacket for the fittings shall consist of precision-formed smooth-sided sections and shall be sized to cover and protect the insulated fitting. Each section shall be manufactured from aluminum, and all joints shall be sealed with silicon mastic to provide a continuous, air- and weathertight joint. Strapping shall be 1/2 inch wide, Type 3003 aluminum or Type 304 stainless steel.

C. The jacket at insulated valves shall fit over the removable insulation and be easily removed and re-installed. It shall be held in place by adjustable stainless steel hose clamps.

D. Metal jacketing shall be 0.016 inch thick, smooth finish aluminum sheet conforming to ASTM B 209, alloy 5005, temper H16, with integral vapor barrier. Sheet metal screws shall be aluminum or stainless steel. Jackets shall be secured with 0.020- by 3/4 inch Type 304 stainless steel expansion bands.

PART 3 - EXECUTION

3.1 INSTALLATION

A. All insulation shall be installed by a qualified insulation Subcontractor in strict accordance with the manufacturer's recommendations and the requirements of these Specifications.

B. Insulation shall be installed in accordance with the manufacturer’s published instructions.

C. Piping shall be tested and shall be subject to ENGINEER's acceptance prior to insulation installation.

D. All end joints of insulation shall be tightly butted.

E. All seams and joints shall be held by manufacturer's standard adhesive. F. Jacket laps shall be neatly pasted in place.

G. All joints shall be pointed with insulating cement.

H. Fittings and valves shall be covered with the same material as the pipe, cut in segments to fit snugly without open spaces, held in place with copper wire or cement, and then covered with the same jacketing material as the pipe.

I. Insulation at valves and other devices shall be formed into two halves, easily removable for valve maintenance. The halves shall be constructed from segments cemented together to fit the valve and to extend over the adjacent piping insulation.

J. Insulated fittings adjacent to vapor-barrier insulation shall be sealed with acceptable vapor-barrier cement before installation of the finish jacket.

K. Pipe insulation and vapor-barrier shall be continuous through hangers and supports. Hangers shall permit insulation to pass through. Suitable saddles shall be provided to prevent the weight of the piping from being supported by the insulation.

L. All insulation shall be installed in the presence of the ENGINEER.