36C25819B0020-014.doc

Remove and Replace Drains and Drain Lines

TASK ORDER NO.605-20-206

VA LOMA LINDA HEALTHCARE SYSTEM

Date: 01/18/2019

CONSTRUCTION DOCUMENT (CD)

SECTION 22 07 11

PLUMBING INSULATION

PART 1 ‑ GENERAL

1.1 DESCRIPTION

A.

Field applied insulation for thermal efficiency and condensation control for

1.

Plumbing piping and equipment.

B.

Definitions

1.

ASJ: All service jacket, white finish facing or jacket.

2.

Air conditioned space: Space having air temperature and/or humidity controlled by mechanical equipment.

3.

Cold: Equipment or piping handling media at design temperature of 16 degrees C (60 degrees F) or below.

4.

Concealed: Piping above ceilings and in chases, interstitial space, and pipe spaces.

5.

Exposed: Piping and equipment exposed to view in finished areas including mechanical equipment rooms or exposed to outdoor weather. Shafts, chases, interstitial spaces, unfinished attics, crawl spaces and pipe basements are not considered finished areas.

6.

FSK: Foil‑scrim‑kraft facing.

7.

Hot: Plumbing equipment or piping handling media above 41 degrees C (105 degrees F).

8.

Density: kg/m3 - kilograms per cubic meter (Pcf - pounds per cubic foot).

9.

Thermal conductance: Heat flow rate through materials.

a.

Flat surface: Watts per square meter (BTU per hour per square foot).

b.

Pipe or Cylinder: Watts per square meter (BTU per hour per linear foot).

10. Thermal Conductivity (k): Watt per meter, per degree C (BTU per inch thickness, per hour, per square foot, per degree F temperature difference).

11. Vapor Retarder (Vapor Barrier): A material which retards the transmission (migration) of water vapor. Performance of the vapor retarder is rated in terms of permeance (perms). For the purpose of this specification, vapor retarders shall have a maximum published permeance of 0.1 perms and vapor barriers shall have a maximum published permeance of 0.001 perms.

12. R: Pump recirculation.

13. CW: Cold water.

14. SW: Soft water.

15. HW: Hot water.

16. PVDC: Polyvinylidene chloride vapor retarder jacketing, white.

1.2 QUALITY ASSURANCE

A.

Refer to article QUALITY ASSURANCE, in Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING.

B.

Criteria:

1.

Comply with NFPA 90A, particularly paragraphs 4.3.3.1 through 4.3.3.6, 4.3.10.2.6, and 5.4.6.4, parts of which are quoted as follows:

4.3.3.1 Pipe insulation and coverings, vapor retarder facings, adhesives, fasteners, tapes, unless otherwise provided for in 4.3.3.1.12 or 4.3.3.1.2, shall have, in the form in which they are used, a maximum flame spread index of 25 without evidence of continued progressive combustion and a maximum smoke developed index of 50 when tested in accordance with NFPA 255, Standard Method of Test of Surface Burning Characteristics of Building Materials.

4.3.3.1.1 Where these products are to be applied with adhesives, they shall be tested with such adhesives applied, or the adhesives used shall have a maximum flame spread index of 25 and a maximum smoke developed index of 50 when in the final dry state. (See 4.2.4.2.)

4.3.3.3 Pipe insulation and coverings shall not flame, glow, smolder, or smoke when tested in accordance with a similar test for pipe covering, ASTM C 411, Standard Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation, at the temperature to which they are exposed in service.

4.3.3.3.1 In no case shall the test temperature be below 121°C (250°F).

4.3.10.2.6.3 Nonferrous fire sprinkler piping shall be listed as having a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.5 m (5 ft) or less when tested in accordance with UL 1887, Standard for Safety Fire Test of Plastic Sprinkler Pipe for Visible Flame and Smoke Characteristics.

4.3.10.2.6.7 Smoke detectors shall not be required to meet the provisions of this section.

2.

Test methods: ASTM E84, UL 723, or NFPA 255.

3.

Specified k factors are at 24 degrees C (75 degrees F) mean temperature unless stated otherwise. Where optional thermal insulation material is used, select thickness to provide thermal conductance no greater than that for the specified material. For pipe, use insulation manufacturer's published heat flow tables. For domestic hot water supply and return, run out insulation and condensation control insulation, no thickness adjustment need be made.

4.

All materials shall be compatible and suitable for service temperature, and shall not contribute to corrosion or otherwise attack surface to which applied in either the wet or dry state.

C. Every package or standard container of insulation or accessories delivered to the job site for use must have a manufacturer's stamp or label giving the name of the manufacturer and description of the material.

1.3 SUBMITTALS

A.

Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B.

Shop Drawings:

1.

All information, clearly presented, shall be included to determine compliance with drawings and specifications and ASTM, federal and military specifications.

a.

Insulation materials: Specify each type used and state surface burning characteristics.

b.

Insulation facings and jackets: Each type used.

c.

Insulation accessory materials: Each type used.

d.

Manufacturer's installation and fitting fabrication instructions for flexible unicellular insulation.

e.

Make reference to applicable specification paragraph numbers for coordination.

C. Samples:

1.

Each type of insulation: Minimum size 100 mm (4 inches) square for board, block, or blanket; 150 mm (6 inches) long, full diameter for round types.

2.

Each type of facing and jacket: Minimum size 100 mm (4 inches square).

3.

Each accessory material: Minimum 120 ML (4 ounce) liquid container or 120 gram (4 ounce) dry weight for adhesives, cement, or mastic.

1.4 STORAGE AND HANDLING OF MATERIAL

Store materials in clean and dry environment, pipe covering jackets shall be clean and unmarred. Place adhesives in original containers. Maintain ambient temperatures and conditions as required by printed instructions of manufacturers of adhesives, mastics and finishing cements.

1.5 APPLICABLE PUBLICATIONS

A.

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by basic designation only.

B.

Federal Specifications (Fed. Spec.):

L‑P‑535E (2)-91 Plastic Sheet (Sheeting): Plastic Strip; Poly (Vinyl Chloride) and Poly (Vinyl Chloride - Vinyl Acetate), Rigid.

C.

Military Specifications (Mil. Spec.):

MIL‑A‑3316C (2)-90

Adhesives, Fire‑Resistant, Thermal Insulation

MIL‑A‑24179A (1)-87

Adhesive, Flexible Unicellular‑Plastic Thermal Insulation

MIL‑C‑19565C (1)-88

Coating Compounds, Thermal Insulation, Fire-and Water-Resistant, Vapor-Barrier

MIL‑C‑20079H-87

Cloth, Glass; Tape, Textile Glass; and Thread, Glass and Wire-Reinforced Glass

D.

American Society for Testing and Materials (ASTM):

A167-04 Standard Specification for Stainless and Heat‑Resisting Chromium‑Nickel Steel Plate, Sheet, and Strip

B209-07 Standard Specification for Aluminum and Aluminum‑Alloy Sheet and Plate

C411-05 Standard test method for Hot‑Surface Performance of High‑Temperature Thermal Insulation

C449-07 Standard Specification for Mineral Fiber Hydraulic‑Setting Thermal Insulating and Finishing Cement

C533-09 Standard Specification for Calcium Silicate Block and Pipe Thermal Insulation

C534-08 Standard Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form

C547-07 Standard Specification for Mineral Fiber pipe Insulation

C552‑07 Standard Specification for Cellular Glass Thermal Insulation

C553-08 Standard Specification for Mineral Fiber Blanket Thermal Insulation for Commercial and Industrial Applications

C585-09 Standard Practice for Inner and Outer Diameters of Rigid Thermal Insulation for Nominal Sizes of Pipe and Tubing (NPS System) R (1998)

C612-10 Standard Specification for Mineral Fiber Block and Board Thermal Insulation

C1126-10 Standard Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation

C1136-10 Standard Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation

D1668‑97a (2006) Standard Specification for Glass Fabrics (Woven and Treated) for Roofing and Waterproofing

E84-10 Standard Test Method for Surface Burning Characteristics of Building

Materials

E119‑09C Standard Test Method for Fire Tests of Building Construction and Materials

E136‑09 b Standard Test Methods for Behavior of Materials in a Vertical Tube Furnace at 750 degrees C (1380 F)

E.

National Fire Protection Association (NFPA):

101-09 Life Safety Code

251-06 Standard methods of Tests of Fire Endurance of Building Construction Materials

255-06 Standard Method of tests of Surface Burning Characteristics of Building Materials F.

Underwriters Laboratories, Inc (UL):

UL Standard for Safety Test for Surface Burning Characteristics of Building Materials with Revision of 08/03

G.

Manufacturer’s Standardization Society of the Valve and Fitting Industry (MSS):

SP58-2002

Pipe Hangers and Supports Materials, Design, and Manufacture

PART 2 ‑ PRODUCTS

2.1 MINERAL FIBER or fiber glass

A.

ASTM C612 (Board, Block), Class 1 or 2, density 48 kg/m3 (3 pcf), k = 0.037 (.26) at 24 degrees C (75 degrees F), external insulation for temperatures up to 204 degrees C (400 degrees F).

B.

ASTM C553 (Blanket, Flexible) Type I, Class B-3, Density 16 kg/m3 (1 pcf), k = 0.045 (0.31), Class B-5, Density 32 kg/m3 (2 pcf), k = 0.04 (0.27) at 24 degrees C (75 degrees F), for use at temperatures up to 204 degrees C (400 degrees F)

C.

ASTM C547 (Pipe Fitting Insulation and Preformed Pipe Insulation),Class 1, k = 0.037 (0.26) at 24 degrees C (75 degrees F), for use at temperatures up to 230 degrees C (450 degrees F)with an all service vapor retarder jacket with polyvinyl chloride premolded fitting covering.

2.2 Mineral wool or refractory fiber

A.

Comply with Standard ASTM C612, Class 3, 450 degrees C (850 degrees F).

2.3 RIGID CELLULAR PHENOLIC Foam

A.

Preformed (molded) pipe insulation, ASTM C1126, type III, grade 1, k = 0.021(0.15) at 10 degrees C (50 degrees F), for use at temperatures up to 121 degrees C (250 degrees F) with vapor retarder and all service vapor retarder jacket with polyvinyl chloride premolded fitting covering.

B.

Equipment Insulation, ASTM C 1126, type II, grade 1, k = 0.021 (0.15) at 10 degrees C (50 degrees F), for use at temperatures up to 121 degrees C (250 degrees F) with rigid cellular phenolic insulation and covering, and all service vapor retarder jacket.

2.4 CELLULAR GLASS closed-cell

A.

Comply with Standard ASTM C177, C518, density 120 kg/m3 (7.5 pcf) nominal, k = 0.033 (0.29) at 240 degrees C (75 degrees F).

B.

Pipe insulation for use at temperatures up to 200 degrees C (400 degrees F) with all service vapor retarder jacket.

2.5 polyisocyanurate closed-cell rigid

A.

Preformed (fabricated) pipe insulation, ASTM C591, type IV, K=0.027(0.19) at 24 degrees C (75 degrees F), flame spread not over 25, smoke developed not over 50, for use at temperatures up to 149 degree C (300 degree F) with factory applied PVDC or all service vapor retarder jacket with polyvinyl chloride premolded fitting covers.

B.

Equipment and duct insulation, ASTM C 591,type IV, K=0.027(0.19) at 24 degrees C (75 degrees F), for use at temperatures up to 149 degrees C (300 degrees F) with PVDC or all service jacket vapor retarder jacket.

2.6 FLEXIBLE ELASTOMERIC CELLULAR THERMAL

ASTM C177, C518, k = 0.039 (0.27) at 24 degrees C (75 degrees F), flame spread not over 25, smoke developed not over 50, for temperatures from minus 4 degrees C (40 degrees F) to 93 degrees C (200 degrees F). No jacket required.

2.7 calcium silicate

A.

Preformed pipe Insulation: ASTM C533, Type I and Type II with indicator denoting asbestos-free material.

B.

Premolded Pipe Fitting Insulation: ASTM C533, Type I and Type II with indicator denoting asbestos-free material.

C.

Equipment Insulation: ASTM C533, Type I and Type II

D.

Characteristics:

Insulation Characteristics

Thermal conductivity:

Min W/ m K (Btu in/h ft2 degrees F)@ mean temperature of 93 degrees C (200 degrees F) 0.059

(0.41)

0.078 (0.540)

Surface burning characteristics:

Flame spread Index, Maximum

2.8 INSULATION FACINGS AND JACKETS

A.

Vapor Retarder, higher strength with low water permeance = 0.02 or less perm rating, Beach puncture 50 units for insulation facing on pipe insulation jackets. Facings and jackets shall be all service type (ASJ) or PVDC Vapor Retarder jacketing.

B.

ASJ jacket shall be white kraft bonded to 0.025 mm (1 mil) thick aluminum foil, fiberglass reinforced, with pressure sensitive adhesive closure. Comply with ASTM C1136. Beach puncture 50 units, Suitable for painting without sizing. Jackets shall have minimum 40 mm (1-1/2 inch) lap on longitudinal joints and minimum 75mm (3 inch) butt strip on end joints. Butt strip material shall be same as the jacket. Lap and butt strips shall be self-sealing type with factory-applied pressure sensitive adhesive.

C.

Vapor Retarder medium strength with low water vapor permeance of 0.02 or less perm rating), Beach puncture 25 units: Foil‑Scrim‑Kraft (FSK) or PVDC vapor retarder jacketing type for concealed ductwork and equipment.

D.

Field applied vapor barrier jackets shall be provided, in addition to the specified facings and jackets, on all exterior piping as well as on interior piping exposed to outdoor air (i.e.; in ventilated attics, piping in ventilated (not air conditioned) spaces, etc.)in high humidity areas conveying fluids below ambient temperature. The vapor barrier jacket shall consist of a multi-layer laminated cladding with a maximum water vapor permeance of 0.001 perms. The minimum puncture resistance shall be 35 cm-kg (30 inch-pounds) for interior locations and 92 cm-kg (80 inch-pounds) for exterior or exposed locations or where the insulation is subject to damage.

E.

Glass Cloth Jackets: Presized, minimum 0.18 kg per square meter (7.8 ounces per square yard), 2000 kPa (300 psig) bursting strength with integral vapor retarder where required or specified. Weather proof if utilized for outside service.

F.

Factory composite materials may be used provided G.

Pipe fitting insulation covering (jackets): Fitting covering shall be premolded to match shape of fitting and shall be polyvinyl chloride (PVC) conforming to Fed Spec L-P-335, composition A, Type II Grade GU, and Type III, minimum thickness 0.7 mm (0.03 inches). Provide color matching vapor retarder pressure sensitive tape.

H.

Aluminum Jacket-Piping systems and circular breeching and stacks: ASTM B209, 3003 alloy, H-14 temper, 0.6 mm (0.023 inch) minimum thickness with locking longitudinal joints. Jackets for elbows, tees and other fittings shall be factory-fabricated to match shape of fitting and of 0.6 mm (0.024) inch minimum thickness aluminum. Fittings shall be of same construction as straight run jackets but need not be of the same alloy. Factory-fabricated stainless steel bands shall be installed on all circumferential joints. Bands shall be 13 mm (0.5 inch) wide on 450 mm (18 inch) centers. System shall be weatherproof if utilized for outside service.

I.

Aluminum jacket-Rectangular breeching: ASTM B209, 3003 alloy, H-14 temper, 0.5 mm (0.020 inches) thick with 32 mm (1-1/4 inch) corrugations or 0.8 mm (0.032 inches) thick with no corrugations. System shall be weatherproof if used for outside service.

2.9 pipe covering protection saddles

A.

Cold pipe support: Premolded pipe insulation 180 degrees (half-shells) on bottom half of pipe at supports. Material shall be cellular glass or high density Polyisocyanurate insulation of the same thickness as adjacent insulation. Density of Polyisocyanurate insulation shall be a minimum of 48 kg/m3 (3.0 pcf).

Nominal Pipe Size and Accessories Material (Insert Blocks)

B.

Warm or hot pipe supports: Premolded pipe insulation (180 degree half-shells) on bottom half of pipe at supports. Material shall be high density Polyisocyanurate (for temperatures up to 149 degrees C [300 degrees F]), cellular glass or calcium silicate. Insulation at supports shall have same thickness as adjacent insulation. Density of Polyisocyanurate insulation shall be a minimum of 48 kg/m3 (3.0 pcf).

2.10 adhesive, Mastic, Cement

A.

Mil. Spec. MIL‑A‑3316, Class 1: Jacket and lap adhesive and protective finish coating for insulation.

B.

Mil. Spec. MIL‑A‑3316, Class 2: Adhesive for laps and for adhering insulation to metal surfaces.

C.

Mil. Spec. MIL‑A‑24179, Type II Class 1: Adhesive for installing flexible unicellular insulation and for laps and general use.

D.

Mil. Spec. MIL‑C‑19565, Type I: Protective finish for outdoor use.

E.

Mil. Spec. MIL‑C‑19565, Type I or Type II: Vapor barrier compound for indoor use.

F.

ASTM C449: Mineral fiber hydraulic‑setting thermal insulating and finishing cement.

G.

Other: Insulation manufacturers' published recommendations.

2.11 Mechanical Fasteners

A.

Pins, anchors: Welded pins, or metal or nylon anchors with galvanized steel or fiber washer, or clips. Pin diameter shall be as recommended by the insulation manufacturer.

B.

Staples: Outward clinching galvanized steel

C.

Wire: 1.3 mm thick (18 gage) soft annealed galvanized or 1.9 mm (14 gage) copper clad steel or nickel copper alloy.

D.

Bands: 13 mm (1/2 inch) nominal width, brass, galvanized steel, aluminum or stainless steel.

2.12 Reinforcement and Finishes

A.

Glass fabric, open weave: ASTM D1668, Type III (resin treated) and Type I (asphalt treated).

B.

Glass fiber fitting tape: Mil. Spec MIL‑C‑20079, Type II, Class 1.

C.

Tape for Flexible Elastomeric Cellular Insulation: As recommended by the insulation manufacturer.

D.

Hexagonal wire netting: 25 mm (one inch) mesh, 0.85 mm thick (22 gage) galvanized steel.

E.

Corner beads: 50 mm (2 inch) by 50 mm (2 inch), 0.55 mm thick (26 gage) galvanized steel; or, 25 mm (1 inch) by 25 mm (1 inch), 0.47 mm thick (28 gage) aluminum angle adhered to 50 mm (2 inch) by 50 mm (2 inch) Kraft paper.

F.

PVC fitting cover: Fed. Spec L‑P‑535, Composition A, 11‑86 Type II, Grade GU, with Form B Mineral Fiber insert, for media temperature 4 degrees C (40 degrees F) to 121 degrees C (250 degrees F). Below 4 degrees C (40 degrees F) and above 121 degrees C (250 degrees F). Provide double layer insert. Provide color matching vapor barrier pressure sensitive tape.

2.13 Firestopping Material

Other than pipe insulation, refer to Section 07 84 00 FIRESTOPPING.

2.14 flame and smoke

Unless shown otherwise all assembled systems shall meet flame spread 25 and smoke developed 50 rating as developed under ASTM, NFPA and UL standards and specifications. See paragraph 1.3 "Quality Assurance".

PART 3 - EXECUTION

3.1 GENERAL REQUIREMENTS

A.

Required pressure tests of piping joints and connections shall be completed and the work approved by the Contracting Officer Technical Representative for application of insulation. Surface shall be clean and dry with all foreign materials, such as dirt, oil, loose scale and rust removed.

B.

Except for specific exceptions, insulate all specified equipment, and piping (pipe, fittings, valves, accessories). Insulate each pipe individually. Do not use scrap pieces of insulation where a full length section will fit.

C.

Where removal of insulation of piping and equipment is required to comply with Section 02 82 11, TRADITIONAL ASBESTOS ABATEMENT and Section 02 82 13.13, GLOVEBAG ASBESTOS ABATEMENT, such areas shall be reinsulated to comply with this specification.

D.

Insulation materials shall be installed in a first class manner with smooth and even surfaces, with jackets and facings drawn tight and smoothly cemented down at all laps. Insulation shall be continuous through all sleeves and openings, except at fire dampers and duct heaters (NFPA 90A). Vapor retarders shall be continuous and uninterrupted throughout systems with operating temperature 16 degrees C (60 degrees F) and below. Lap and seal vapor barrier over ends and exposed edges of insulation. Anchors, supports and other metal projections through insulation on cold surfaces shall be insulated and vapor sealed for a minimum length of 150 mm (6 inches).

E.

Install vapor stops at all insulation terminations on either side of valves, pumps and equipment and particularly in straight lengths of pipe insulation.

F.

Construct insulation on parts of equipment such as cold water pumps and heat exchangers that must be opened periodically for maintenance or repair, so insulation can be removed and replaced without damage. Install insulation with bolted 1 mm thick (20 gage) galvanized steel or aluminum covers as complete units, or in sections, with all necessary supports, and split to coincide with flange/split of the equipment.

G.

Insulation on hot piping and equipment shall be terminated square at items not to be insulated, access openings and nameplates. Cover all exposed raw insulation with white sealer or jacket material.

H.

Protect all insulations outside of buildings with aluminum jacket using lock joint or other approved system for a continuous weather tight system. Access doors and other items requiring maintenance or access shall be removable and sealable.

I.

Plumbing work not to be insulated:

1.

Piping and valves of fire protection system.

2.

Chromium plated brass piping.

3.

Water piping in contact with earth.

4.

Small horizontal cold water branch runs in partitions to individual fixtures may be without insulation for maximum distance of 900 mm (3 feet).

5.

Distilled water piping.

J.

Apply insulation materials subject to the manufacturer's recommended temperature limits. Apply adhesives, mastic and coatings at the manufacturer's recommended minimum coverage.

K.

Elbows, flanges and other fittings shall be insulated with the same material as is used on the pipe straights. Use of polyurethane spray-foam to fill a PVC elbow jacket is prohibited on cold applications.

L.

Firestop Pipe insulation:

1.

Provide firestopping insulation at fire and smoke barriers through penetrations. Fire stopping insulation shall be UL listed as defines in Section 07 84 00, FIRESTOPPING.

2.

Pipe penetrations requiring fire stop insulation including, but not limited to the following:

a.

Pipe risers through floors b.

Pipe chase walls and floors c.

Smoke partitions d.

Fire partitions

M.

Freeze protection of above grade outdoor piping (over heat tracing tape): 20 mm (0.75) thick insulation, for all pipe sizes 75 mm (3 inches) and smaller and 25 mm(1inch) thick insulation for larger pipes. Provide metal jackets for all pipes. Provide for cold water make-up where indicated on the drawings as described in Section 23 21 13, HYDRONIC PIPING (electrical heat tracing systems).

N.

Provide vapor barrier jackets over insulation as follows:

1.

All piping exposed to outdoor weather.

2.

All interior piping conveying fluids or exposed to outdoor air (i.e. in attics, ventilated (not air conditioned) spaces, etc.) below ambient air temperature in high humidity areas.

O.

Provide metal jackets over insulation as follows:

a.

All plumbing piping exposed to outdoor weather.

b.

Piping exposed in building, within 1800 mm (6 feet) of the floor, that connects to sterilizers, kitchen and laundry equipment. Jackets may be applied with pop rivets. Provide aluminum angle ring escutcheons at wall, ceiling or floor penetrations.

c.

A 50 mm (2 inch) overlap is required at longitudinal and circumferential joints.

3.2 INSULATION INSTALLATION

A.

Mineral Fiber Board:

1.

Faced board: Apply board on pins spaced not more than 300 mm (12 inches) on center each way, and not less than 75 mm (3 inches) from each edge of board. In addition to pins, apply insulation bonding adhesive to entire underside of horizontal metal surfaces. Butt insulation edges tightly and seal all joints with laps and butt strips. After applying speed clips cut pins off flush and apply vapor seal patches over clips.

2.

Plain board:

a.

Insulation shall be scored, beveled or mitered to provide tight joints and be secured to equipment with bands spaced 225 mm (9 inches) on center for irregular surfaces or with pins and clips on flat surfaces. Use corner beads to protect edges of insulation.

b.

For hot equipment: Stretch 25 mm (1 inch) mesh wire, with edges wire laced together, over insulation and finish with insulating and finishing cement applied in one coat, 6 mm (1/4 inch) thick, trowel led to a smooth finish.

c.

For cold equipment: Apply meshed glass fabric in a tack coat 1.5 to 1.7 square meter per liter (60 to 70 square feet per gallon) of vapor mastic and finish with mastic at 0.3 to 0.4 square meter per liter (12 to 15 square feet per gallon) over the entire fabric surface.

3.

Cold equipment: 40 mm (1-1/2inch) thick insulation faced with ASJ.

a.

Water filter, chemical feeder pot or tank.

b.

Pneumatic, cold storage water and surge tanks.

4.

Hot equipment: 40 mm (1-1/2 inch) thick insulation faced with ASJ.

a.

Domestic water heaters and hot water storage tanks (not factory insulated).

b.

Booster water heaters for dietetics dish and pot washers and for washdown grease-extracting hoods.

B. Molded Mineral Fiber Pipe and Tubing Covering:

1.

Fit insulation to pipe, aligning longitudinal joints. Seal longitudinal joint laps and circumferential butt strips by rubbing hard with a nylon sealing tool to assure a positive seal. Staples may be used to assist in securing insulation. Seal all vapor retarder penetrations on cold piping with a generous application of vapor barrier mastic. Provide inserts and install with metal insulation shields at outside pipe supports. Install freeze protection insulation over heating cable.

2.

Contractor's options for fitting, flange and valve insulation:

a.

Insulating and finishing cement for sizes less than 100 mm (4 inches) operating at surface temperature of 16 degrees C (61 degrees F) or more.

b.

Factory premolded, one piece PVC covers with mineral fiber, (Form B), inserts. Provide two insert layers for pipe temperatures below 4 degrees C (40 degrees F), or above 121 degrees C (250 degrees F). Secure first layer of insulation with twine. Seal seam edges with vapor barrier mastic and secure with fitting tape.

c.

Factory molded, ASTM C547 or field mitered sections, joined with adhesive or wired in place. For hot piping finish with a smoothing coat of finishing cement. For cold fittings, 16 degrees C (60 degrees F) or less, vapor seal with a layer of glass fitting tape imbedded between two 2 mm (1/16 inch) coats of vapor barrier mastic.

d.

Fitting tape shall extend over the adjacent pipe insulation and overlap on itself at least 50 mm (2 inches).

3.

Nominal thickness in millimeters and inches specified in the schedule at the end of this section.

C.

Rigid Cellular Phenolic Foam:

1.

Rigid closed cell phenolic insulation may be provided for piping, ductwork and equipment for temperatures up to 121 degrees C (250 degrees F).

2.

Note the NFPA 90A burning characteristics requirements of 25/50 in paragraph 1.3.B

3.

Provide secure attachment facilities such as welding pins.

4.

Apply insulation with joints tightly drawn together

5.

Apply adhesives, coverings, neatly finished at fittings, and valves.

6.

Final installation shall be smooth, tight, neatly finished at all edges.

7.

Minimum thickness in millimeters (inches) specified in the schedule at the end of this section.

8.

Condensation control insulation: Minimum 25 mm (1.0 inch) thick for all pipe sizes.

a.

Plumbing piping as follows:

1) Body of roof and overflow drains horizontal runs and offsets (including elbows) of interior downspout piping in all areas above pipe basement.

2) Waste piping from electric water coolers and icemakers to drainage system.

3) Waste piping located above basement floor from ice making and film developing equipment and air handling units, from equipment (including trap) to main vertical waste pipe.

4) MRI quench vent piping.

5) Bedpan sanitizer atmospheric vent

6) Reagent grade water piping.

7) Cold water piping.

D.

Cellular Glass Insulation:

1.

Pipe and tubing, covering nominal thickness in millimeters and inches as specified in the schedule at the end of this section.

2.

Underground Piping Other than or in lieu of that Specified in Section 22 11 00, FACILITY WATER DISTRIBUTION: Type II, factory jacketed with a 3 mm laminate jacketing consisting of 3000 mm x 3000 mm (10 ft x 10 ft) asphalt impregant4ed glass fabric, bituminous mastic and outside protective plastic film.

a.

75 mm (3 inches) thick for hot water piping.

b.

As scheduled at the end of this section for chilled water piping.

c.

Underground piping: Apply insulation with joints tightly butted. Seal longitudinal self-sealing lap. Use field fabricated or factory made fittings. Seal butt joints and fitting with jacketing as recommended by the insulation manufacturer. Use 100 mm (4 inch) wide strips to seal butt joints.

d.

Provide expansion chambers for pipe loops, anchors and wall penetrations as recommended by the insulation manufacturer.

e.

Underground insulation shall be inspected and approved by the

Contracting Officer Technical Representative as follows:

1) Insulation in place before coating.

2) After coating.

f.

Sand bed and backfill: Minimum 75 mm (3 inches) all around

Insulated pipe or tank, applied after coating has dried.

3.

Cold equipment: 50 mm (2 inch) thick insulation faced with ASJ.

E.

Polyisocyanurate Closed-Cell Rigid Insulation:

1.

Polyisocyanurate closed-cell rigid insulation (PIR) may be provided for exterior piping and equipment for temperature up to 149 degree C (300 degree F.

2.

Install insulation, vapor retarder and jacketing per manufacturer’s recommendations. Particular attention should be paid to recommendations for joint staggering, adhesive application, external hanger design, expansion/contraction joint design and spacing and vapor retarder integrity.

3.

Install insulation with all joints tightly butted (except expansion) joints in hot applications).

4.

If insulation thickness exceeds 63 mm (2.5 inches), install as a double layer system with longitudinal (lap) and butt joint staggering as recommended by manufacturer.

5.

For cold applications, vapor retarder shall be installed in a continuous manner. No staples, rivets, screws or any other attachment device capable of penetrating the vapor retarder shall be used to attach the vapor retarder or jacketing. No wire ties capable of penetrating the vapor retarder shall be used to hold the insulation in place. Banding shall be used to attach PVC or metal jacketing.

6.

Elbows, flanges and other fittings shall be insulated with the same material as is used on the pipe straights. The elbow/ fitting insulation shall be field-fabricated, mitered or factory prefabricated to the necessary size and shape to fit on the elbow/ fitting. Use of polyurethane spray-foam to fill PVC elbow jacket is prohibited on cold applications.

7.

For cold applications, the vapor retarder on elbows/fittings shall be either mastic-fabric-mastic or 2 mil thick PVDC vapor retarder adhesive tape.

8.

All PVC and metal jacketing shall be installed so as to naturally shed water. Joints shall point down and shall be sealed with either adhesive or caulking (except for periodic slip joints).

9.

Note the NFPA 90A burning characteristic requirements of 25/50 in paragraph 1.3B. Refer to paragraph 3.1 for items not to be insulated.

10.

Minimum thickness in millimeter (inches) specified in the schedule at the end of this section.

F.

Flexible Elastomeric Cellular Thermal Insulation:

1.

Apply insulation and fabricate fittings in accordance with the manufacturer's installation instructions and finish with two coats of weather resistant finish as recommended by the insulation manufacturer.

2.

Pipe and tubing insulation:

a.

Use proper size material. Do not stretch or strain insulation.

b.

To avoid undue compression of insulation, provide cork stoppers or wood inserts at supports as recommended by the insulation manufacturer. Insulation shields are specified under Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING.

c.

Where possible, slip insulation over the pipe or tubing prior to connection, and seal the butt joints with adhesive. Where the slip‑on technique is not possible, slit the insulation and apply it to the pipe sealing the seam and joints with contact adhesive. Optional tape sealing, as recommended by the manufacturer, may be employed. Make changes from mineral fiber insulation in a straight run of pipe, not at a fitting. Seal joint with tape.

3.

Apply sheet insulation to flat or large curved surfaces with 100 percent adhesive coverage. For fittings and large pipe, apply adhesive to seams only.

4.

Pipe insulation: nominal thickness in millimeters (inches as specified in the schedule at the end of this section.

G.

Calcium Silicate:

1.

Minimum thickness in millimeter (inches) specified below for piping other than in boiler plant.

Nominal Thickness Of Calcium Silicate Insulation

(Non-Boiler Plant)

Nominal Pipe Size

Millimeters (Inches) Thru 25 (1)

32 to 75

(1-1/4 to 3) 100-200

(4 to 6) Over 200

(6)

2.

MRI Quench Vent Insulation: Type I, class D, 150 mm (6 inch) nominal thickness.

3.3 PIPE INSULATION SCHEDULE

Provide insulation for piping systems as scheduled below:

Insulation Thickness Millimeters (Inches)

Nominal Pipe Size Millimeters (Inches)

25 (1)

(1½ - 3) 100 (4) and Above

38-60 degrees C (100-140 degrees F)

(Domestic Hot Water Supply and Return)

38-60 degrees C (100-140 degrees F)

(Domestic Hot Water Supply and Return)

38-60 degrees C (100-140 degrees F)

(Domestic Hot Water Supply and Return)

38-60 degrees C (100-140 degrees F)

(Domestic Hot Water Supply and Return)

4-16 degrees C

(40-60 degrees F)

(Ice water piping)

4-16 degrees C

(40-60 degrees F)

(Ice water piping)

(4-16 degrees C

(40-60 degrees F)

(Ice water piping)

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