15250.doc

96-620

00-32 07-733 07-743

SECTION 15250 - INSULATION

PART 1 GENERAL

1.1

FIRE RATINGS

A.

All products used shall be UL listed with a maximum flame spread rating of 25 and maximum smoke development rating of 50. Fire ratings shall be determined by ASTME-84 or NFPA Standard 255. Insulation approved shall have a UL label or a certified test report from an approved testing agency.

1.2

SUBMITTALS

A.

Provide manufacturer's literature and ratings for all pipe and duct insulation products. Data shall include fire and smoke ratings, thermal conductivities, recommended temperature limitations, perm ratings of jackets and materials of construction.

B.

Submittals shall be clearly marked to indicate what insulation and cover is to be used, insulation thickness and which system is to be insulated with each product.

1.3

LABORATORY EQUIPMENT PIPING

A.

Laboratory equipment supplied for this project will require field insulation at the point of piping connections to the sterilizers. The contractor shall familiarize himself with that equipment and provide the required insulation.

PART 2 PRODUCTS

2.1

ACCEPTABLE PRODUCTS

A.

Equivalent products of Armstrong, Johns-Manville, Knauf, Certainteed, and Owens-Corning are acceptable.

B.

Owens-Corning catalog designations and descriptions used herein.

C.

Substitute insulation shall provide same thermal and mechanical protection as the insulation specified.

2.2

PIPE INSULATION

A.

Pipe insulation shall be Owens-Corning Fiberglass 25 ASJ/SSL pipe insulation or equal, unless otherwise specifically noted herein. Wall thickness shall be as listed herein for each system and pipe size. Apply field installed PVC jacket on all insulated piping systems, except generator exhaust system.

B.

Hot service piping systems shall be covered with insulation in thicknesses as listed herein.

System/Pipe Size 1" & Under 1-1/4" - 2" 2-1/2" - 4" 5" - 6"

8"& Above

Industrial Hot Water

1/2"

1-1/2"

Recirc. Hot water

Steam (0-15 psi)

2"

2-1/2"

3”

Steam (15-60 psi)

3"

3-1/2"

4"

Steam (above 60 psi)

Steam Condensate

Return

2-1/2"

3-1/2"

Steam & Condensate

Vents

1”

C.

Cold service piping systems shall be covered with insulation in thickness as listed herein.

System Pipe Size 1-1/4" & Under

1-1/2" to 3" 3-1/2" to 5" 6" to 10" 10" & Above

Industrial Cold Water

3/4"

3/4"

1"

D.

Valve Bodies, Flanges and Fittings 3” and Smaller in Size

1.

Fittings shall be insulated to the thickness of adjacent insulation and covered with premolded plastic jacket, such as Zeston. Provide extra insulation at elbow head to prevent fitting cover 'oil canning'.

2.

Valve bodies 2” and under in size, flanges, and appurtenances in pipe lines and 1-1/2” in size and smaller shall be insulated with sections of molded fiberglass insulation, mudded and wrapped with a jacket applied with white mastic adhesive to meet the flame spread and smoke restrictions above.

3. The insulation on valve bodies, flanges and appurtenances in the boiler room and in the mechanical rooms shall be squared off to present a neat, straight-line appearance. Jacket to be canvas applied as noted in paragraph 2, above.

4. Valves 2” and over in size shall be insulated with removable pads as specified in paragraphs.

E.

Valve Bodies, Flanges and Fittings Larger than 2” in Size

1.

Flanged valves, pressure regulators, pipe flanges and strainers and all steam trap assemblies shall be insulated with custom removable pads constructed of 2” thick high temperature, mechanically bonded glass fiber blanket insulation ,J.P. Stevens “Insulbatte/Tempmat” style 1031 meeting MIL-I-16411 Type II requirements, sandwiched between two layers of 2025/9383 glass cloth as manufactured by J.P. Stevens. Sew or staple seams and lace in place using Bergen hooks and attach with 18-gauge soft annealed stainless steel wire.

F.

All components in an insulated system, such as separators and heat exchangers, shall be insulated.

2.3

PVC AND METAL JACKETS

A.

All insulated indoor pipes shall be covered with PVC jackets. Jacket material shall be as listed below.

1.

PVC, .030" thick, with solvent welded joints and seams, meeting ASTM C 921, type 1, UV resistant. Pre-molded fitting covers.

PART 3 EXECUTION

3.1

GENERAL

A.

Insulation shall only be installed by trained insulating crews of the manufacturer.

B.

Materials, accessories, fasteners and installation methods shall be in strict accord with manufacturer's recommendations and guide specifications.

C.

The appearance of the finished work will be of equal importance with its mechanical correctness for acceptance.

3.2

INSTALLATION

A.

Termination of insulation at equipment, unions, etc., shall be neat without any raw edges. Bevel insulation and cover each end the same as a fitting.

B.

Vapor barrier jackets on all cold and dual temperature pipes and ducts shall be continuous. Repair all punctures, flaps, etc., correctly and effectively.

C.

Pipe Insulation

1.

Install half diameter calcium silicate insulation inserts at all hangers for insulated piping 1-1/4" to 4" in diameter. Install galvanized insulation protection shields at all hangers for pipe up to 4" in diameter. Pipes over 4" in diameter shall be fitted with weld-on pipe saddles. Wrap insulation jacket around high density inserts. Seal jacket to weld-on saddles. Seal all joints and seams of jacket to maintain vapor barrier integrity.

D.

PVC Jacket

1.

Apply in strict accordance with manufacturer’s instructions, using fully solvent welded joints and seams. Apply to all portions of all interior pipe systems and their components.

E.

Existing Insulation

1.

Where existing piping and equipment are removed or connected to and the existing insulation is damaged, the Contractor shall repair all existing insulation and jacketing to match the new insulation.

END OF SECTION 15250

PACKAGE M OUTBUILDING RENOVATION ( NIH-NIAID RML ( HAMILTON, MT

INSULATION 15250-4

RML AUTOCLAVE REPLACEMENT ( NIH-NIAID RML ( HAMILTON, MT

INSULATION 15250-2