"ALL PLASTIC" Corrosion Resistant
Fume Exhaust Systems and Duct Fittings
Polyvinyl Chloride (PVC)
Chlorinated Polyvinyl Chloride (CPVC)
Polypropylene (PPRO)
Complete Pre-Engineered or Component
Systems
Designed for Durability and Cost Efficiency
Thermoplastics Reduce Weight and Increase Reliability
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Qualified Fabricator Program
PLASTINETICS®, Inc. was one of the first
fabricators to become qualified under Noveon Inc.'s
new CORZAN™ Key Industrial Fabricator Program.
Suggested Standard Specifications
For PVC Ducting
Applicability of ASTM standards as it pertains
to PVC Ducting
A) ASTM-D1784 Compounds utilized in the manufacture of base
components, which covers Type I and/or Type II material
B) ASTM-D-635 Flammability UL94V-9 (Self Extinguishing)
C) ASTM-E-84 Flame Spread (10-25) Fuel Contribution (0)
EXHAUST DUCT
All ventilation duct components to be fabricated
of PVC Type I, Grade I (dark gray) and/or PVC Type II, Grade I (light
gray) material. The PVC Type II, Grade I material can be rolled
without heating, resulting in a lower cost for the finished product.
Selection of materials of construction shall be at the purview of
PLASTINETICS®, unless otherwise specified by the Buyer.
ROUND DUCT
Round PVC duct will be seamless and extruded
in sizes 6" through 24". Below 4", Schedule 40 gray
PVC pipe will be utilized.
Nominal wall thickness for 6" through 18"
will be .187"; 20" size will be .219" and 24"
size will be .250". Nominal wall thickness, 4" and below,
will conform to ASTM Standard D-1785 for Schedule 40 pipe.
Round PVC duct above 24" will be cold rolled
from Type II Grade I extruded PVC sheet material. The seam will
be thermal fused utilizing a computerized welding machine. The sheet
edges are heated and pressed together pneumatically achieving 100%
weld strength using no filler rod. Wall thickness will be 3/16"
for sizes up to 32" diameter. Above 32" diameter...1/4"
material will be used, unless otherwise specified.
Elbows will have an approximate centerline radius
of 1-1/2" times duct diameter, 90° elbows can be either
3-piece or 5-piece mitre, 45° elbows, 2 or 3 piece mitre. Specific
job requirements will determine which type is used. If no preference
is given, 3-piece 90° elbows and 2-piece 45° elbows will
be provided.
Transitions will be tapered, cone-type only.
The cone will be the same material thickness as the duct material.
Transitions will be concentric, unless otherwise specified.
Branches will enter the main ducting at a 45°
angle, unless otherwise specified.
Couplings for sizes up to 24" can be either
sleeve type (no stop) or standard with a stop. Only sleeve couplings
are available in sizes above 24". Socket depth for both to
be 2 1/2".
Flanges for size 6" through 20" will
be heat formed from PVC duct or cut from flat sheet stock. Flanges
for 24" and above will be formed from PVC Type I extruded angle.
Leg size will either 1-1/2" x 3/16" for diameters up to
30" or 2" x 1/4" for sizes above 30".
Bolt holes will be 5/16" diameter on approximate
4" centers. Suggested bolting can be either galvanized or 304
SS. Both should be 1/4"-20 x 1-1/4" long with a nut and
two washers provided for each bolt.
Suggested gaskets should be 1/8" thick,
closed cell neoprene for duct sizes up to 24"; above 24",
3/16" thick neoprene should be used.
Suggested flexible connections should be 3/16"
neoprene, 6" wide, with two SS draw bands.
Quadrant dampers or blastgates will be provided
with a locking device for permanently setting after balancing.
End caps can be either permanently welded in
place or fabricated to allow removal.
Access panels and/or view ports can be provided
with clear PVC material or Plexiglas and will be held in place with
SS self-tapping screws.
Reinforcements, if required, will be per SMACNA,
Second Edition, January 1995, or greater, for the particular water
gauge specified.
Installation (joining) can be accomplished
with the bell and spigot (cementing) method, flanging or thermal
welding.
PVC
Duct... Product Properties, Ratings and Support Recommendations
|
GENERAL
|
|
Value |
|
Test Method |
|
Cell Classification
|
|
12454-B
|
|
ASTM D1784
|
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Specific Gravity
|
|
1.40 ± .02
|
|
ASTM D792
|
|
Water Absorption
% increase 24 hrs. @ 25°C
|
|
.05%
|
|
ASTM D570
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Hardness, Rockwell
|
|
110-120
|
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ASTM D785
|
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Poisson's ration @ 73°F
|
|
.410
|
|
|
| Hazen-Williams
Factor |
|
C =
150 |
|
|
| |
|
|
|
|
| MECHANICAL |
|
|
|
|
| Tensile Strength, psi @ 73°F |
|
7,450 |
|
ASTM D638 |
| Modulus of Elasticity, psi
@ 73°F |
|
420,000 |
|
ASTM D638 |
| Flexural Strength, psi @ 73°F |
|
14,450 |
|
ASTM D790 |
| Compressive Strength, psi
@ 73°F |
|
9,600 |
|
ASTM D695 |
| Izod Impact, ft-lb/in @ 73°F |
|
.75 |
|
ASTM D256 |
| |
|
|
|
|
| THERMAL |
|
|
|
|
| Coefficient of Linear Expansion
(in/in/°F) |
|
2.9 x 10-5 |
|
ASTM D696 |
| Coefficient of Thermal Conductivity
(BTU/in/hr/°F) |
|
3.5 |
|
ASTM C177 |
| Heat Distortion Temperature, °F |
|
170 |
|
ASTM D648 |
| Specific Heat, Cal/°C/gm |
|
.25 |
|
ASTM D2766 |
| |
|
|
|
|
| ELECTRICAL |
|
|
|
|
| Dielectric Strength, V/mil |
|
1,413 |
|
ASTM
D149 |
| Dielectric Constant 60Hz,
30°F |
|
3.70 |
|
ASTM D150 |
| Volume Resistivity, ohm/cm
@ 73°F |
|
1.2 x 1012 |
|
ASTM D257 |
| Harvel CPVC Duct is non-electrolytic |
|
|
|
|
| |
|
|
|
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| FLAMMABILITY |
|
|
|
|
| Flammability Rating |
|
V-0 |
|
UL 94 |
| Flame Spread Index |
|
<10 |
|
ASTM
E162 |
| Flame Spread |
|
0-25 |
|
ULC |
| |
|
10-25 |
|
ASTM E84 |
| Flash Ignition Temperature |
|
730°F |
|
|
| Average Time of Burning |
|
<5 |
|
ASTM D635 |
| Average Extent of Burning,
mm |
|
<10 |
|
|
| Burning Rate (in/min) |
|
Self-Extinguishing |
|
|
| Softening Starts (approx.) |
|
250°F |
|
|
| Material Becomes Viscous |
|
350°F |
|
|
| Material Carbonizes |
|
425°F |
|
ASTM D2863 |
| Smoke Generation |
|
80-225 |
|
ULC |
| |
|
600-1,000 |
|
ASTM E84 |
SOLVENT CEMENTING -- PVC
Belled-end duct, fittings
such as couplings, elbows and other socket-style fittings can
be joined using the solvent-cementing
process. This process involves the application of a primer and
solvent cement to join system components. When properly conducted,
this method provides a strong, homogeneous joining area in which
the mating surfaces are chemically fused together, producing a
strong, leak-tight seal when cured. A socket depth of 3” (all
sizes) will provide sufficient joint strength for most systems.
Since duct dimensional tolerances can be appreciable when compared
to heavy wall pipe, the use of extra-heavy-bodied PVC cement (such
as IPS 719) is recommended due to the cement’s excellent
gap-filling properties.
IPS Weld-On #719 is a heavy duty (paste-like) high strength cement.
It has excellent gap properties, which become particularly desirable
where a sizable gap exists between pipe and fitting.
Additional information can be obtained by calling the IPS Corporation,
Compton, California 310-898-3300, Fax: 310-898-3390, www.ipscorp.com.
Maximum Internal Negative
Pressure Rating
Inches of water @ various
Temperatures °F
|
| Size |
Temperature °F |
| |
73 |
80 |
90 |
100 |
110 |
120 |
130 |
140 |
|
| 6" x 1/8 |
115 |
101 |
86 |
71 |
59 |
46 |
36 |
25 |
| 6" |
415 |
365 |
311 |
257 |
212 |
166 |
129 |
91 |
|
| 7" |
301 |
265 |
226 |
187 |
153 |
120 |
93 |
66 |
| 8" |
188 |
166 |
141 |
117 |
96 |
75 |
58 |
41 |
|
| 9" |
146 |
129 |
110 |
91 |
75 |
59 |
45 |
32 |
| 10" |
97 |
85 |
73 |
60 |
50 |
39 |
30 |
21 |
|
| 11" |
82 |
72 |
61 |
51 |
42 |
33 |
25 |
18 |
| 12" |
58 |
51 |
44 |
36 |
30 |
23 |
18 |
13 |
|
| 14" |
44 |
39 |
33 |
27 |
22 |
18 |
14 |
10 |
| 16" |
29 |
26 |
22 |
18 |
15 |
12 |
9 |
6 |
|
| 18" |
21 |
18 |
16 |
13 |
11 |
8 |
6 |
4 |
| 20" |
24 |
21 |
18 |
15 |
12 |
10 |
7 |
5 |
|
| 24" |
21 |
18 |
16 |
13 |
11 |
8 |
6 |
4 |
PSI = Inches of Water
x .0361;
Inches of Mercury
= Inches of Water
x .07355
NOTE: Maximum values
stated are for extruded duct pipe only, and incorporate a 1.5:1
safety factor. Consideration should be given to system design,
method of fabrication, and joining which may require additional
system derating. The use of compressed air or gasses is not recommended
for use with PVC/CPVC Duct piping.
HANGERS
Hangers selected shall have an adequate load-bearing surface free
of rough or sharp edges, shall not cause damage to the duct during
use, and are to be of a type that will not restrict linear movement
of the system due to expansion and contraction.
|
Size |
Temperature °F |
| |
73 |
80 |
90 |
100 |
110 |
120 |
130 |
140 |
|
| 6" x 1/8 |
9 1/2 |
9 |
9 |
8 1/2 |
8 |
7 1/2 |
7 |
6 1/2 |
| 6" |
10 |
10 |
9 1/2 |
9 |
8 1/2 |
8 |
7 1/2 |
6 1/2 |
|
| 7" |
10 |
10 |
9 1/2 |
9 |
8 1/2 |
8 |
7 1/2 |
7 |
| 8" |
10 |
10 |
10 |
10 |
9 |
9 |
8 |
7 1/2 |
|
| 9" |
10 |
10 |
10 |
10 |
10 |
9 |
8 1/2 |
8 |
| 10" |
10 |
10 |
10 |
10 |
10 |
10 |
9 |
8 1/2 |
|
| 11" |
10 |
10 |
10 |
10 |
10 |
10 |
9 1/2 |
9 |
| 12" |
12 |
12 |
12 |
12 |
11 1/2 |
11 1/2 |
11 |
10 |
|
| 14" |
12 |
12 |
12 |
12 |
11 1/2 |
11 1/2 |
11 |
10 |
| 16" |
12 |
12 |
12 |
12 |
12 |
12 |
11 |
10 |
|
| 18" |
12 |
12 |
12 |
12 |
12 |
12 |
11 1/2 |
11 |
| 20" |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
11 1/2 |
|
| 24" |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
12 |
Above based on an allowable 1/8" deflection.
Data courtesy of
Harvel Plastics, Inc. Printed by permission.
REINFORCEMENT
Due to PVC Duct’s
inherent rigidity, additional system reinforcements or flanges
are not required for 6” through 24” sizes
(.187” average wall or higher) up to 100?F and 10” of
negative internal static pressure, provided proper support spacing
requirements are followed. Reinforcements are not required for
systems under positive pressure when standard support spacing requirements
are followed.
RECTANGULAR DUCT
Rectangular duct will be formed from Type I
Grade I PVC extruded sheet material. Corners will be heat bent and
seams thermal fused where applicable. Where heat bending and thermal
fusion is not possible, corner welding with PVC filler rod will
be utilized.
Where the developed length is 120" or less,
3/16" material will be used. Above 120", 1/4 sheet will
be used.
Both 45° and 90° elbows will be 2 pieces,
square throat. The 90° elbows will have turning vanes made from
PVC extruded duct material.
Transitions will be tapered and will be the
same material thickness as the duct. They will be concentric unless
otherwise noted.
Branches will enter main run at 45° angle
only unless otherwise specified.
Couplings will be sleeve type only. Overall
length is 6" and will be the same thickness as the duct.
Flanges for 3/16" wall duct will be 1-1/2"
x 3/16" PVC Type I angle. Flanges for 1/4" wall duct,
2" x 1/4" Type I PVC angle will be used. Bolt holes will
be 5/16" diameter on approximate 4" centers.
Bolting, gaskets and flexible connections will
be the same as the round duct standards.
End caps and access panels will be the same
as the round duct standards.
Reinforcement, if required, will be per SMACNA
Second Edition, January 1995, for the particular water gauge
specified. Joining can also be accomplished with the bell
(coupling) and spigot method, flanging or field welding
Square and Rectangular Duct
 |
Outside Dimension |
Wall Thickness |
Length |
| 6 x 12 |
3/16 |
96 |
| 8 x 12 |
3/16 |
96 |
| 8 x 8 |
3/16 |
48 |
| 10 x 12 |
3/16 |
96 |
| 12 x 12 |
3/16 |
96 |
| 12 x 16 |
3/16 |
48 |
| 12 x 18 |
1/4 |
48 |
| 12 x 24 |
1/4 |
48 |
| 14 x 14 |
3/16 |
48 |
| 14 x 16 |
3/16 |
48 |
| 14 x 32 |
1/4 |
48 |
| 16 x 16 |
3/16 |
48 |
| 16 x 18 |
3/16 |
48 |
| 16 x 24 |
1/4 |
48 |
| 16 x 32 |
1/4 |
48 |
| 18 x 18 |
1/4 |
48 |
| 18 x 24 |
1/4 |
48 |
| 20 x 20 |
1/4 |
48 |
| 20 x 24 |
1/4 |
48 |
| 22 x 22 |
1/4 |
48 |
| 24 x 24 |
14 |
48 |
The above are standard sizes
Note:
Dimensions are in inches.
Other sizes available on request.
Custom wall thicknesses and lengths, consult factory.
Fittings available, consult factory.
WELDING FOR ROUND
AND RECTANGULAR DUCT
Welding will be accomplished by using either
the hot gas fusion method using fill rod or thermal fusion. The
rod will be 5/32" or 3/16" thick.
All joints will have a minimum of one weld
bead to a maximum of three. This includes elbows, transitions, branches,
couplings, flanges and end caps.
The foregoing information is based on our 32
years experience as a plastic fabricator. Particular engineering
requirements may alter any of the above. However, we feel these
are proven shop methods which produces a reliable product for
many
years of trouble free service.
BASIC
GUIDE TO SPECIFYING AND ORDERING
The following information represents a basic
product guide to assist with both specifying and ordering a wide
range of standard products readily available from PLASTINETICS®,
Inc.
CORROSION RESISTANT EXHAUST SYSTEMS
PLASTINETICS®; thermoplastic chemical and
corrosion resistant fume exhaust systems are pre-engineered to save
you both time and money. PLASTINETICS® can provide you with
the component parts, such as straight duct and fittings or a complete
turnkey system including exhaust fans and scrubbing equipment. The
efficiency and effectiveness of exhaust systems are important to
you and the maintenance of air quality standards. All PLASTINETICS®
duct systems are designed in accordance with the recommended practice
of the American Conference of Governmental Industrial Hygienists
and fabricated in accordance with Sheet Metal and Air Conditioning
Contractors National Association, Inc. (SMACNA) manual for Thermoplastic
Construction.
DUCT AND PIPE FITTINGS
Our 65,000 square ft. facility maintains a
complete line of duct and fittings from 6" through 24"
diameter. The unusual is standard at PLASTINETICS®. We are
able to manufacture to 96" diameter with square and rectangular
duct also available. While our specialty is to prefabricate entire
fume duct systems manufactured to your specifications, PLASTINETICS®
also manufactures and supplies fume duct pipe, fittings, dampers,
rain caps, blast gates, etc. for field assembly.
MATERIALS
Thermoplastics are the answer to your most
difficult design problem adding lightweight, versatility, durability,
corrosion resistance and cost efficiency. We offer a wide range
of corrosion resistant plastics including: PVC, Corzan® (CPVC)
and Polypropylene.
PVC & CPVC (Belled End) Duct Fittings Conforming
to ASTM-D-1784 Material Standard
CORZAN™ Key Industrial Fabricator
Program is a trademark of Noveon Inc.
 
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