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Bright annealed copper tube in coils
- Available in 10, 20 & 30 Metre coils
- Tables show Stock Sizes.
- For none-standard sizes please email us
at enquiries@abacus-tubes.co.uk
or telephone us on +44(0)1484-515386
Imperial Sizes ......................................................................................
»
Click
here for Refrigeration sizes
| WALL
THICKNESS |
OUTSIDE
DIAMETER |
| 22G |
1/8 |
3/16 |
1/4 |
5/16 |
3/8 |
|
|
|
| 20G |
|
3/16 |
1/4 |
5/16 |
3/8 |
1/2 |
5/8 |
3/4 |
| 18G |
|
|
1/4 |
5/16 |
3/8 |
1/2 |
|
|
| 16G |
|
|
1/4 |
5/16 |
3/8 |
1/2 |
5/8 |
|
Metric Sizes ......................................................................................
»
Click
here for Refrigeration sizes
| WALL
THICKNESS |
OUTSIDE
DIAMETER |
| 0.6mm |
4mm |
|
|
|
|
|
|
| 0.8mm |
|
5mm |
6mm |
8mm |
10mm |
12mm |
|
| 1.0mm |
|
|
6mm |
8mm |
10mm |
12mm |
15mm |
| 1.2mm |
|
|
|
|
10mm |
12mm |
|
1.5mm |
|
|
|
|
|
12mm |
15mm |
1.6mm |
|
|
6mm |
|
|
|
|
Copper Brake Pipe............................................................................
»
Click
here for Refrigeration sizes
| WALL
THICKNESS |
OUTSIDE
DIAMETER |
LENGTH |
| 22G |
3/16" |
25ft/7.62mtrs |
|
20G |
3/16" |
25ft/7.62mtrs |
|
0.71
mm |
3.5mm |
25ft/7.62mtrs |
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General Information............................................................................
Abacus Tubes Ltd. is one of
the leading stockholders of bright annealed
general engineering copper coil in the UK. Complying
to all the major international specifications
including ASTM, JIS, SIS and European Standards
in CU-DHP, SF-CU and CW024. With a comprehensive
stock covering all the popular sizes from 1/8”
& 4mm OD at the lower end of the range up
to 3/4“ & 15mm OD, Abacus Tubes offers
an excellent range of 10, 20 and 30Mtr coils.
These tubes are manufactured
with an outside diameter tolerance of +0.0/-0.08mm
(0.003”), annealed at approximately 600°C,
giving a hardness range of 45/60 HV5.
Uses include hot & cold
water services, refrigeration, air conditioning,
sanitation, medical & industrial functions
involving oil, common gases & liquids, including
automotive and refinery applications.
Abacus Tubes can quickly provide
customers with price, availability, technical
information and immediate dispatch including
dedicated labelling if required.
Abacus coils
can be hand straightened or bent as required
using standard bending springs or hand-held
benders of the correct size.
The jointing of the tubes is by the traditional
methods of compression type fittings or
soldered ends. It is recommended that the
tube be re-rounded prior to jointing and
that the fittings manufacturer’s instructions
be adhered to.
|
For more
aggressive environments, copper tube with
a PVC or LDPE sheath may be an effective
method of protection against attack.
The PVC or LDPE is tightly extruded onto
the tube and is available in black, white,
green, blue and yellow according to customer
requirements.
As an alternative sheath, where conditions
require, low-smoke, flame-retardant material
can also be offered.
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Bursting Pressures............................................................................
Subjecting tube to internal hydraulic pressures
will result in stress half as much longitudinally
as it is circumferentially. Hydraulic failure,
therefore, usually takes the form of a longitudinal
fracture, i.e. at right angles to the stress.
Bursting pressures of heavy
duty tubes are difficult to calculate. However,
in the case of lighter and thinner wall tubes,
a figure for bursting pressure can be derived
from a formula utilising the relationship between
circumferential or hoop stress to the dimensions
of the tube, as in:
Pressure
= |
2
x Hoop Stress x Thickness |
|
Bore
+ Thickness |
By inserting the UTS value for the tube into
this formula, the approximate bursting pressure
can be calculated.
| |
Est.
BP in psi |
|
Est.
BP in psi |
| 1/8”
od x 22swg |
18,100 |
4mm
od x 0.6mm |
11,060 |
| 3/16”
od x 22swg |
10,950 |
4mm
od x 0.6mm |
11,060 |
| 3/16”
od x 20swg |
14,855 |
4mm
od x 1.0mm |
20,900 |
| 1/4"
od x 22swg |
7,920 |
5mm
od x 0.8mm |
11,900 |
| 1/4"
od x 20swg |
10,210 |
6mm
od x 0.8mm |
9,650 |
| 1/4"
od x 18swg |
14,900 |
6mm
od x 1.0mm |
12,785 |
| 1/4"
od x 16swg |
21,580 |
8mm
od x 0.8mm |
6,970 |
| 5/16”
od x 22swg |
6,170 |
8mm
od x 1.0mm |
9,120 |
| 5/16”
od x 20swg |
7,890 |
10mm
od x 0.8mm |
5,450 |
| 5/16”
od x 18swg |
11,380 |
10mm
od x 1.0mm |
7,090 |
| 5/16”
od x 16swg |
16,150 |
10mm
od x 1.2mm |
8,550 |
| 3/8”
od x 22swg |
5,060 |
12mm
od x 0.8mm |
4,480 |
| 3/8”
od x 20swg |
6,455 |
12mm
od x 1.0mm |
5,800 |
| 3/8”
od x 18swg |
9,200 |
12mm
od x 1.2mm |
6,920 |
| 3/8”
od x 16swg |
12,900 |
15mm
od x 1.0mm |
4,480 |
| 1/2"
od x 20swg |
4,720 |
Abacus Tubes
Ltd. do not supply recommended working
pressures, as each user needs to decide
on the appropriate safety factor.
|
| 1/2"
od x 18swg |
6,600 |
| 1/2"
od x 16swg |
9,200 |
| 5/8”
od x 20swg |
3,800 |
| 5/8”
od x 16swg |
7,155 |
| 3/4"
od x 20swg |
3,160 |
|
