ST-503I_raci spacer_L

● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
RACI SPACER TYPE L
Mar./10
Rev. 1.0 - General revision
Editing L.Manoni
Approval G.Borta
1/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.
Raci spacer type L
ST 503I
D es c ri pti o n
● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
In many countries pipelines crossing
or running parallel to highways and
railways shall be protected by
casing. Spacers are used in order to
separate the carrier pipeline from
the casing. Raci casing Spacers
isolate water, sewer and gas
pipelines from casing simply and
effectively. Insulators are required
to separate casing and carrier pipes
according to the following
requirements:
□ Must ensure electrical insulation
between the carrier pipe and the
casing pipe;
□ Must guarantee an easy insertion
of the carrier into the casing pipe
preventing damage of carrier
pipe coating;
□ Must permit to be tightly
fastened onto carrier pipes in
order to avoid horizontal
movements during insertion;
□ Must be made of material which
does not conduct electricity and
which ensures permanent
resistance to chemical corrosion;
□ Must be resistant to mechanical
and thermal shocks and stresses,
particularly those that occur
during both the installation and
the inserting operation.
C h ar a ct e ri s ti c s
□ Spacers are manufactured
entirely out of high density
polyethylene (HDPE). No metal
bolts or attachments are
required;
□ The modular system which
permits to compose insulator
rings allows spacers to be used
on a wide pipe diameter range
therefore reducing inventory
costs;
□ Spacers are quickly and easily
assembled by manually fitting
elements one into the other.
□ The tooth insertion method
allows on site adjustments to fit
a wide range of pipe diameters;
□ A low friction coefficient
guarantees an easy insertion into
the casing;
□ Spacers are designed and tested
to maintain continuous and long
term support for the carrier pipe
and its contents;
□ Spacers provide a constant projectio n around the entire circumference of the carrier pipe;
□ Spacers provide long term protection from corrosion;
□ Spacers can be installed on steel-coated pipes, concrete pipes, ductile iron pipes or plastic pipes.
Jul./10
Rev. 1.1 - General revision
2/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.
Raci spacer type L
ST 503I
HD P E C h ar a c te ri s t i cs – t a bl e A
Description
Value
Standard Ref.
Yield strength *
≥ 25 N/mm2
UNI EN ISO 527-2
Elongation at break *
> 200%
UNI EN ISO 527-2
Hardness shore D
Dielectric strength
UVL stabilization
64
ASTM D 2240
-20°C
-20°C
> 37 kV/mm
ASTM D 149/64
Good
* on test specimen with extruded material
Raci’s production quality control:
BATCH NUMBER MARKING
RACI quality dept. also provide samplesurveys by installing a few elements on a
pipe and checking them through an
ageing test which is carried out in the
climatic chamber. This test will last for
15 days. The temperature excursion
range will be from -20° C to +80° C.
After this test, samples will be checked
against creep or any other damage.
Te c h ni c al d a ta – t a bl e D
L25-L50
Total length
A
(mm)
394
280 - 325
Width
B
(mm)
210
L75-L100
394
280 – 325
210
75-100
2500
L125
394
280 – 325
210
125
2000
TYPE
Useful length
(mm)
Height
h
(mm)
25-50
Ring carrying
capacity* (Kg)
3000
1500
h
L150-L175-L200
394
280 – 325
210
150-175-200
* values esteemed and verified under static and ideal conditions.
A
B
● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
Minimum working
temperature
Minimum stocking
temperature
All Raci tests are carried out in our
internal laboratory according to the UNI
EN 527 standard. For each production
batch, we test 10 specimens which verify
compliance to our standards (see TABLE
A).
When mechanical characteristics are
satisfied, we guarantee the production of
the specific batch by marking every
elements with the corresponding batch
number. This allows to trace the story of
each element.
During the production phase, all pieces
are tested according to their project’s
drawing. Before packaging, visual
inspection ensures that the overall
quality reaches our standards.
Jul./10
Rev. 1.1 - General revision
3/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.
Raci spacer type L
ST 503I
Sp a c e rs c al c ul ati o n L El em e nt - t a bl e B 1
Sp a c e r he i gh t 2 5- 1 2 5 mm
● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
CARRIER PIPE O.D.
ELEMENTS TO
MAKE ONE INSULATOR
RECOMMENDED
SPACING BETWEEN
INSULATORS (I)
Height ≤125 mm
Ø MIN
Ø MAX
N1
WATER
GAS
450
510
5
2,5
2,5
540
610
6
2,5
2,5
625
715
7
2,5
2,5
715
805
8
2,5
2,5
805
895
9
2
2,5
895
985
10
2
2,5
985
1075
11
1,5
2,5
1075
1160
12
1
2
1160
1250
13
1
2
1250
1340
14
1
2
1340
1430
15
0,8
2
1430
1520
16
0,8
2
1520
1610
17
0,5
2
1610
1750
18
0,5
2
Sp a c e rs c al c ul ati o n L El em e nt - t a bl e B 2
Sp a c e r he i gh t 1 5 0- 2 0 0 mm
CARRIER PIPE O.D.
Jul./10
ELEMENTS TO
MAKE ONE INSULATOR
RECOMMENDED
SPACING BETWEEN
INSULATORS (I)
Height ≥ 150 mm
Ø MIN
Ø MAX
N1
WATER
GAS
450
510
5
2,5
2,5
540
610
6
2,5
2,5
625
715
7
2,5
2,5
715
805
8
2
2,5
805
895
9
1,5
2,5
895
985
10
1,2
2,5
985
1075
11
1,2
2,5
1075
1160
12
1
2
1160
1250
13
0,8
2
1250
1340
14
0,8
2
1340
1430
15
0,6
1,5
1430
1520
16
0,5
1,5
1520
1610
17
0,5
1,5
1610
1750
18
0,5
1,5
Rev. 1.1 - General revision
4/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.
Raci spacer type L
ST 503I
R i n gs a n d el e m e nt s n u m b er c al c ul ati o n
The exact number of elements, N2, comes from the following formula:
N2 = L/I + 3
N2 - required rings
L - crossing length
I - spacing as per table B
N1 - elements to make one insulator as per table B
The total number of elements for each crossing Ntot is:
● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
Ntot = N1 x N2
R e q ui r e d q u a nti ty o f s el f a ma l g a m ati n g t a p e ( m) - t a bl e E
In case of plastic carrier pipe (PVC, PE and similar), it is suggested to tape the contact area
between the ring insulator and the carrier pipe: this precaution will avoid any horizontal sliding
of the rings on the carr ier pipe during the inserting operations. The follo wing table resumes the
required quantity of tape for each insulating ring referred to the different pipe size.
CARRIER
PIPE O.D.
16”
20”
24”
30”
32”
36”
40”
42”
48”
Required quantity
(m)
5,25
6,6
7,8
9,75
10,35
11,7
12,9
13,5
15,45
Required quantity
(in)
206,7
259,8
307,1
383,9
407,5
460,6
507,9
531,5
608,3
Please note that the above quantities concerning tape consumption are calculated considering
rolls height 100 mm.
Assembly Instructions
Assemble the insulator ring as shown in the above pictures leaving the ring open at the ends.
During this procedure do not insert one end of each segment over the second section of the guide of
the other end (detail A).
Jul./10
Rev. 1.1 - General revision
5/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.
Raci spacer type L
ST 503I
● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
Complete the insulator ring by wrapping the ring around the pipe and close manually the two
remaining ends. Again, do not insert the two ends over the second section of the guide, in order to
make sure that at this stage the belt is not too tig ht on the p ipe.
Start to tighten the ring using the appropriate tool. Make sure that for every joint at least the end
of the third section of the guide has been reached (OK).
Continuously proceed to tighten the insulator ring in order to guarantee, that the number of fixing
teeth engaged is as homogeneous as possible on all joints.
Do not use any lever extensions to increase the torque because this could lead to some damages of
the tool. The tool is designed in order to guarantee an appropriate fastening by using the original
lever only.
For pipes with a very smooth external surface (PVC -PE or similar ), in order to avoid the sliding of
the rings along the pipeline axe during pulling the carrier pipe into the casing pipe, we recommend
to increase the friction rate by wrapping some butyl rubber tape around the pipe in correspondence
of every insulator ring.
Apply the tape onto the pipe surface where the insulator ring will be placed. In case of need of
more than one layer of tape to cover the entire width of the insulator ring, remove the protective
film while wrapping it around the pipe by overlapping it by 50%. We recommend not removing the
protective film from the last layer which finally is in contact with the insulator ring in order to avoid
a reduction of the adhesion by possible pollution (dust, rain, etc.).
The assembling procedure of the insulator rings itself is the same as described in point 1 – 4. Only
before the final tightening (point 5) remove the protecting film.
Our technical service is at your disposal for any possible assistance.
Jul./10
Rev. 1.1 - General revision
6/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.
Raci spacer type L
ST 503I
● Raci s.r.l. - via Adriano, 101 20128 Milano –Italy - www.raci.it – tel. +3902262351 – fax +390226235215
PACKAGING
Jul./10
CODE
CARTON BOX
Q.TY FOR BOX
NET WEIGHT
(kg)
GROSS WEIGHT
(kg)
CDL25
60 x 60 x50
60
24
26
CDL41
60 x 60 x50
42
20
22
CDL50
60 x 60 x50
30
14.5
16.5
CDL100
60 x 60 x50
18
15
17
CDL125
60 x 60 x50
14
12.6
13.6
CDL150
60 x 60 x50
12
13
15
CDL175
60 x 60 x50
10
12
14
CDL200
60 x 60 x50
8
9.5
11.5
Rev. 1.1 - General revision
7/7
All technical details given herein are purely indicative, Raci Srl reserves the right to make changing
without prior warning following the growth of its products.