Memorial Hermann Best Practices
July, 2013
SECTION 22 07 00 PLUMBING INSULATION
PART 1 - GENERAL
1.01
DEFINITIONS
A.
Exposed - Equipment and piping in areas which will be visible without removing ceilings or
opening access panels.
B.
Concealed - Installed above ceiling, in walls or chases.
C.
Outdoors - Exposed to the weather or ambient conditions.
D.
Underground - Buried.
1.02
CERTIFICATION/QUALITY ASSURANCE
A.
Insulation, adhesives, coatings, sealers, tapes, shall have a flame spread rating of 25 or less and
smoke development of 50 or less in accordance with ASTM E-84 and UL 723. Materials or
accessories containing asbestos will not be accepted.
B.
Materials shall meet the requirements of NFPA 90-A.
1.03
A.
SUBMITTALS
Submit manufacturer's product data and installation procedures for review.
PART 2 - PRODUCTS
2.01
PIPE AND EQUIPMENT INSULATION
A.
Materials for Pipe and Equipment: Provide factory premolded or shop or site mitered segment
type insulation for pipe, pipe fittings, and valves. Insulating materials shall be fire retardant,
moisture and mildew resistant and vermin proof. Insulation shall be suitable to receive jackets,
adhesives, and coatings as indicated.
B.
Fitting insulation: Same thickness and material as adjoining pipe insulation.
C.
Cellular Glass (Foamglass):
1.
Acceptable manufacturers: Pittsburgh Corning "Foamglas". Maximum thermal
conductivity of 0.29 BTU - in/ (hr - ft2 - degree F) at 75 degrees F mean temperature.
2.
Mastic: Water based, Foster 30-80 or equal
3.
Outer jacket - paintable.
4.
Use on the following services:
a.
Domestic water piping above grade at cooling tower to 18" below grade, 1-1/2"
thick.
D.
Flexible Tubular Elastomeric:
1.
Provide fire-retardant closed-cell slip-on flexible type. Maximum thermal conductivity of
0.27 BTU - in/ (hr - ft2 - degrees F) at 75 degrees F mean temperature.
2.
Acceptable manufacturers: Armacell, "AP Armacell", Rubatex, Namco K-Flex, Inc.,
Aeroflex USA Inc., Aerocel.
3.
Use on the following services:
a.
Moisture condensate drains - 1/2" thick
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Memorial Hermann Best Practices
July, 2013
E.
2.02
Fiberglass Pipe Insulation:
1.
Acceptable manufacturers: Johns-Manville "Micro-Lok 850"; CertainTeed, Knauf, Owens
Corning, Foster Jacket: ASJ fiberglass reinforced kraft paper with aluminum foil.
Maximum thermal conductivity of0.23 BTU - in/ (hr - ft2 - degrees F) at 75 degrees mean
temperature.
2.
Use on the following services:
a.
Domestic hot water supply and recirculating piping - 1-1/2" and less - 1" thick ; 2"
and greater - 2" thick.
b.
Domestic cold water piping in exterior walls and all locations subject to
condensation - 1/2" thick
c.
Horizontal rain water leaders and roof drain bodies - 1" thick
d.
Drain bodies, traps and horizontal drain lines receiving cold condensate - 1/2"
thick. Apply insulation a minimum of 20 feet downstream of drain connection.
MATERIALS FOR FITTINGS, VALVES, AND SPECIAL COVERINGS
A.
Use premolded insulation for pipe fittings, elbows, tees, butterfly valves, and couplings 2-1/2" and
larger. Finish shall be as specified under "Products" herein.
B.
PVC Fitting Covers and Jackets: White PVC film, gloss finish one side, semi-gloss other side, FS
LP-535D, Composition A, Type II, Grade GU. Ultraviolet inhibited indoor/outdoor grade to be
used where exposed to high humidity, ultraviolet radiation, in kitchens or food processing areas or
installed outdoors. Jacket thickness to be minimum .02" indoors/.03" outdoors for piping 12" and
smaller, .03" indoors/.04" outdoors for piping 15" and larger. PVC fitting covers may be used over
the premolded insulation for:
1.
Domestic Cold Water
2.
Domestic Hot Water
3.
Domestic Hot Water Recirc.
C.
PVC fitting covers with fiberglass inserts may be used on piping fittings elbows and valves 2" and
less for the following services:
1.
Domestic Cold Water
2.
Domestic Hot Water
3.
Domestic Hot Water Recirculating.
D.
For any service when above grade exposed-to-the-weather outside the building, ambient
conditions, in tunnels or manholes, cover pipe insulation with Venture Clap 1579 CW and then
with 0.016" thick smooth, aluminum jacket equivalent to ITW Pabco/Childers and cover fittings
with factory formed covers equivalent to Elljacs. Install jacket seams on bottom of pipe.
E.
For flexible tubular elastomeric pipe and fitting insulation when exposed-to-view inside building or
exposed to the weather, finish with two coats of fire retardant self-extinguishing vinyl lacquer type
highly flexible coating equivalent to Armacell "Armaflex Finish", custom color blended to match
surrounding surfaces. Do not tint finish where exposed to weather.
PART 3 - EXECUTION
3.01
INSTALLATION - GENERAL
A.
Deliver and store insulation materials in manufacturer's containers and kept free from dirt, water,
chemical and mechanical damage.
B.
Complete piping pressure testing prior to applying insulation.
C.
Apply insulation in workmanlike manner by experienced and qualified workmen.
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Memorial Hermann Best Practices
July, 2013
D.
Surfaces shall be clean and dry when covering is applied. Covering to be dry when installed and
before and during application of any finish, unless such finish requires specifically a wetted
surface for application.
E.
Adhesives, cements and mastics shall be compatible with materials applied and shall not attack
materials in either wet or dry state.
F.
If new insulation is being used at an existing facility, it shall be identified with blue painted labeling
as "non-ACM" with 2" high letters on 10' centers.
3.02
A.
3.03
FLEXIBLE SHEET ELASTOMERIC INSULATION
Prior to application of flexible sheet elastomeric insulation, thoroughly clean all metal surfaces,
making sure that all dirt, scale, loose paint, plaster, and oil has been removed and that surfaces
are dry. If surface has been primed, test a two square foot section using adhesive equivalent to
Armstrong No. 520 in order to determine whether solvent in adhesive will loosen or lift the primer.
If primer is loosened, then remove it. When testing proves acceptable, adhere insulation with
smooth side out, using thin but adequate coating of same adhesive. Follow manufacturer's
instructions. Coat all butt edges of each sheet. Stagger all joints. Insulate all standing seams or
flanges with same thickness of insulation material as that used on main surface.
INSTALLATION OF PIPE AND EQUIPMENT COVERING
A.
Where glass fiber or flexible tubular elastomeric insulation is used on piping sized 2" and larger,
insert a section of foamglass or calcium silicate insulation, at hanger or support points, between
pipe and metal shield for full length of shield, to prevent crushing of insulation. Where insulation
passes through pipe hangers and across trapeze supports, 12" long metal saddles shall be used.
Insulation thickness to be same as adjoining glass fiber insulation. On cold pipe, vapor barrier
should be carried through the hanger and sealed. Saddles shall be used where rigid foamglass
inserts are not acceptable.
B.
Apply foamglass insulation as follows:
1.
Both the circumferential and longitudinal joints shall be buttered with fire-resistive pliable
sealer. Voids and cracks shall be filled with sealer. Mastic shall be Foster 30-80 or equal.
Secure insulation with 3/4" wide x 0.010" thick aluminum bands on 8" centers.
2.
The circumferential joints shall be staggered.
3.
Fittings, valves, flanges, traps, and air vents shall be insulated with the same thickness of
insulation using factory fabricated fitting sections or pre-molded insulated fittings.
4.
Block type insulation shall be adhered by stick-clips or bands, in addition to the sealer, as
required to provide support for the insulation.
5.
Finish above furred ceilings and in chases shall be the bare insulation.
6.
Finish in equipment rooms and elsewhere where exposed-to-view shall be white 8 oz
canvas paintable jacket.
7.
Finish where exposed-to-the-weather shall be .016 inch thick, Childers, or equal,
aluminum jacket on lines and Elljacs, or equal, pre-formed aluminum covering on fittings.
8.
Finish on underground insulation shall be Pittsburgh Corning Pittwrap as recommended
by manufacturer.
3.04
Apply flexible tubular elastomeric insulation to pipe and fittings with all joints tightly fitted and
sealed with adhesive.
END OF SECTION
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