|
Fabricated steel hangers and supports should be manufactured to
fit the outside diameter of the FRP pipe and duct being used. We
recommend that all hangers and supports be lined with an elastometric
pad (Shore 'A' hardness 50-70) to conform to any surface irregularities
and to provide uniform bearing support.
It is essential that each installation be reviewed to ensure the
proper location and fit of all supporting elements. Maximum recommended
support spacing for ECC Corrosion FRP pipe. For specific applications,
contact ECC Corrosion, Inc..
ECC Corrosion can supply all types of hangers, supports anchors
and clamps for your FRP systems. Alloy or mild steel materials are
available with prime paint, specialty coatings or galvanized finish
to meet project specifications.
Three basic configurations of pipe hangers are used: Sling, Clamp
and Clevis. These hangers do not restrain axial or lateral movement.
Pipe Saddle Supports:
Pipe Saddle Supports may be either fixed or guided, as required
by the system design. These are normally 180° bottom supports
with a 180° retainer band. Guided supports allow slight axial
or lateral movement due to thermal expansion.
Anchors and Guides:
Pipe anchors are used to restrain pipe movement against thrust loads
and thermal expansion. 360° FRP thrust collars are laminated
to the pipe on either side of an anchor support to restrain the
pipe. These collars can be installed in the shop or the field and
are also used with riser clamps for vertical support.
Flange/Component Support:
All valves, regulators, flow meters or other components used in
FRP piping systems should be independently supported to prevent
overstressing the FRP pipe and fittings. One common method is to
use a flange hanger or support as shown below.
Pipe Support Spacing:
Recommended support spacing for filament wound and contact molded
pressure pipe is shown in the tables below. Tables are based on
the following assumptions:
- 180° support saddle using color coding on charts below
- Maximum deflection = span/360
- Simple support conditions
- 180°F maximum temperature
- Wind and seismic effects are not considered
- Specific gravity of contents, 1.2
- Correction Factors for weight of contents
| Sp. Gr. |
Multiplier |
| 1.0 |
1.10 |
| 1.2 |
1.00 |
| 1.4 |
0.93 |
| 1.6 |
0.87 |
| 1.8 |
0.81 |
Filament Wound Pressure Pipe -
Dia and thicknesses are in inches. Span is in feet.
| Dia |
 |
Wall
Thickness |
| |
|
.20 |
.25 |
.30 |
.36 |
.41 |
.46 |
.51 |
.56 |
.62 |
.67 |
.72 |
.77 |
.82 |
.88 |
.93 |
.98 |
1.03 |
|
| 2 |
|
8.0 |
8.5 |
9.0 |
9.5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3 |
|
9.5 |
10.0 |
11.0 |
11.5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4 |
|
10.0 |
11.0 |
12.0 |
12.5 |
13.0 |
|
|
|
|
|
|
|
|
|
|
|
|
| 6 |
|
10.5 |
11.5 |
12.5 |
13.5 |
14.5 |
|
|
|
|
|
|
|
|
|
|
|
|
| 8 |
|
10.5 |
11.5 |
13.0 |
14.0 |
15.0 |
15.5 |
|
|
|
|
|
|
|
|
|
|
|
| 10 |
|
10.5 |
12.0 |
13.0 |
14.0 |
15.0 |
16.0 |
17.0 |
|
|
|
|
|
|
|
|
|
|
| 12 |
|
10.5 |
12.0 |
13.0 |
14.5 |
15.5 |
16.0 |
17.0 |
|
|
|
|
|
|
|
|
|
|
| 14 |
|
10.5 |
12.0 |
13.0 |
14.5 |
15.5 |
16.5 |
17.0 |
18.0 |
|
|
|
|
|
|
|
|
|
| 16 |
|
10.5 |
12.0 |
13.0 |
14.5 |
15.5 |
16.5 |
17.5 |
18.0 |
19.0 |
|
|
|
|
|
|
|
|
| 18 |
|
10.5 |
12.0 |
13.5 |
14.5 |
15.5 |
16.5 |
17.5 |
18.0 |
19.0 |
20.0 |
|
|
|
|
|
|
|
| 20 |
|
11.0 |
12.0 |
13.5 |
14.5 |
16.0 |
16.5 |
17.5 |
18.5 |
19.5 |
20.0 |
|
|
|
|
|
|
|
| 24 |
|
9.5 |
12.5 |
13.5 |
15.0 |
16.0 |
17.0 |
18.0 |
18.5 |
19.5 |
20.0 |
21.0 |
22.0 |
|
|
|
|
|
| 30 |
|
7.5 |
11.0 |
13.5 |
15.0 |
16.0 |
17.0 |
18.0 |
18.5 |
19.5 |
20.5 |
21.0 |
22.0 |
|
|
|
|
|
| 36 |
|
|
9.0 |
12.0 |
14.0 |
16.0 |
17.0 |
18.0 |
18.5 |
19.5 |
20.5 |
21.5 |
22.0 |
23.0 |
23.5 |
|
|
|
| 42 |
|
|
|
10.5 |
12.5 |
14.5 |
16.0 |
18.0 |
18.5 |
20.0 |
21.0 |
21.5 |
22.0 |
23.0 |
23.5 |
24.5 |
|
|
| 48 |
|
|
|
9.0 |
11.0 |
12.5 |
14.0 |
15.5 |
17.0 |
19.0 |
20.5 |
21.5 |
22.0 |
23.0 |
24.0 |
24.5 |
25.0 |
25.0 |
Contact Molded Pressure Pipe -
Dia and thicknesses are in inches. Span is in feet.
| Dia |
|
Wall
Thickness |
| |
|
.18 |
.25 |
.29 |
.37 |
.41 |
.49 |
.56 |
.64 |
.68 |
.76 |
.80 |
.88 |
.95 |
1.00 |
1.10 |
1.26 |
1.38 |
|
| 2 |
|
7.0 |
9.0 |
9.5 |
11.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3 |
|
8.0 |
10.5 |
11.0 |
12.5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4 |
|
8.0 |
11.5 |
12.5 |
14.0 |
14.5 |
|
|
|
|
|
|
|
|
|
|
|
|
| 6 |
|
8.5 |
12.0 |
13.0 |
15.5 |
16.0 |
17.5 |
|
|
|
|
|
|
|
|
|
|
|
| 8 |
|
8.5 |
12.0 |
13.0 |
16.0 |
16.5 |
18.0 |
|
|
|
|
|
|
|
|
|
|
|
| 10 |
|
8.5 |
12.0 |
13.0 |
16.0 |
17.0 |
18.0 |
19.5 |
|
|
|
|
|
|
|
|
|
|
| 12 |
|
9.0 |
12.0 |
13.5 |
16.0 |
17.0 |
18.5 |
19.5 |
20.0 |
|
|
|
|
|
|
|
|
|
| 14 |
|
9.0 |
12.0 |
13.5 |
16.0 |
17.0 |
18.5 |
19.5 |
21.0 |
21.5 |
|
|
|
|
|
|
|
|
| 16 |
|
9.0 |
12.0 |
13.5 |
16.0 |
17.0 |
18.5 |
20.0 |
21.0 |
22.0 |
23.0 |
23.0 |
|
|
|
|
|
|
| 18 |
|
8.0 |
12.0 |
13.5 |
16.5 |
17.0 |
18.5 |
20.0 |
21.0 |
22.0 |
23.0 |
23.5 |
24.0 |
|
|
|
|
|
| 20 |
|
|
10.0 |
13.0 |
16.5 |
17.0 |
19.0 |
20.0 |
21.0 |
22.0 |
23.0 |
23.5 |
24.0 |
25.0 |
26.0 |
|
|
|
| 24 |
|
|
8.5 |
11.0 |
15.0 |
17.0 |
19.0 |
20.0 |
21.5 |
22.0 |
23.0 |
25.0 |
25.0 |
26.0 |
27.5 |
29.0 |
|
|
| 30 |
|
|
|
8.5 |
12.0 |
14.5 |
17.0 |
20.0 |
21.5 |
22.0 |
23.0 |
24.0 |
25.0 |
26.0 |
26.5 |
27.5 |
29.0 |
30.0 |
| 36 |
|
|
|
|
10.0 |
11.0 |
14.5 |
17.5 |
20.0 |
22.0 |
23.0 |
24.0 |
25.0 |
26.0 |
26.5 |
27.5 |
30.0 |
30.0 |
| 42 |
|
|
|
|
|
10.0 |
12.5 |
14.5 |
16.5 |
18.0 |
20.0 |
21.0 |
22.5 |
24.0 |
25.5 |
26.5 |
28.0 |
30.0 |
| 48 |
|
|
|
|
|
9.0 |
10.5 |
12.0 |
14.0 |
15.5 |
17.0 |
18.5 |
19.5 |
20.0 |
21.5 |
22.5 |
24.0 |
25.5 |
Flange Assembly:
Flange assembly should be done in accordance with standard rules
of good practice. Propor alignment and fit up must be maintained
in order to avoid undue stress on the flange. Flat face FRP flanges
and duct flanges must be bolted to flat face companion flanges,
with full gaskets. If raised face flanged equipment is connected
to FRP flanges, a hard plastic or metal spacer ring must be added
to provide a flat connection surface.
FRP stub ends with steel backing flanges may be connected directly
to raised face or flat face steel flanges but must not be connected
to flat face FRP flanges. Ring gaskets should be used with FRP stub
ends. Bolting material should be specified by the user in accordance
with plant practice. Thread lubricants should be applied to all
bolts, except Teflon coated bolts, used on pressure piping. ANSI
Type B, plain washers, regular series must be used against FRP and
cast steel flanges. Gaskets should be made of elastomeric material
having a Shore A Durometer of 50-60. Minimum thickness should be
as follows:
- 1/8 inch through 20 inch diameter
- 3/16 inch for 24 inch diameter through 36 inch diameter
- 1/4 inch for 42 inch diameter and larger
Systems to be operated or tested over 100 psig should use reinforced
gasket material to prevent extrusion of gasket caused by high bolt
torque.
Full Face Flange Connection
|
Raised Face to Full Face Flange Connection
|
Stub Ends with Backing Flanges
|
Bolt Torque:
Maximum Bolt Torque for Pressure Piping -
| Bolt Size in. |
Torque ft - lb |
| 1/2 |
15 |
| 5/8 |
25 |
| 3/4 |
40 |
| 7/8 |
65 |
| 1 |
100 |
| 1 1/8 |
140 |
| 1 1/4 |
200 |
| 1 1/2 |
320 |
| 1 3/4 |
600 |
| 2 |
880 |
Torques result in a bolt stress of 12,000 psi. ANSI Type B Regular
Series washers are recommended. Threads and bearing surfaces are
to be well lubricated. Bolts 1" and larger are 8-thread series.
Bolt Tightening Sequence:
Follow similar patterns for flanges with a greater number of bolts.
Tighten bolts to 50% of required torque in sequence shown. Repeat
tightening in the same sequence until required torque is reached.
Maximum torque is not required for low pressure systems.
|
