| MECHANICAL
JOINTS FOR DRAINAGE |
Figure 1: Lightweight-type joints |
Figure 2: Comparison of wall thickness
(left, conventional type; right, lightweight type) |
|
| Overview |
The requirment
for flexible, easy-to-install fittings for carbon steel drainage
piping has led to the widespread replacement of screw-type joints
with mechanical joints for drainage (Named MD).
Besides, demand for large-bore piping has increased as buildings
are built higher and higher, as well as for more pressure-resistant
piping that can meet Japan's earthquake-resistant construction standards
and cope with high-pressure drainage.
To meet these demands, Hitachi Metals has developed lightweight mechanical
joints made of nodular graphite cast iron (Ductile) instead of the
conventional joints made of gray cast iron.
Not only is the lightweight MD joint approximately 30% lighter than
Hitachi Metals' conventional MD joints, but it is also tough enough
to overcome gray cast iron's problem of brittleness.
|
| Features |
- Strong and durable
Substantially improved shock resistance and tensility, due to
the use of nodular graphite cast iron (Ductile) as a body material
instead of gray cast iron
- Substantial weight reduction
MD joints 4"in size or over take a long time to install
because of their heavy weight. The new lightweight MD joint is
approximately 30% lighter than our conventional products, making
it much easier to work with.
- Same functionality as MD and CD joints
Use of a superior material does not mean that the benefits of
MD and CD joints are lost. In addition, because its size is
the same as that of MD and CD joints, the new lightweight MD
joint can be installed in the same way as before.
|
| Major
uses |
- The MD joints can be used in:
- Sewage piping, various types of wastewater piping
- If water pressure from pressure pump lines or other lines
rises over 0.08MPa, it should be used in combination with
an, supporting part, MD grip.
- Fluid temperature
- Applicable fields:
- Kitchen, bath, sink, toilet and other household wastewater,
and rainwater
- The MD joints can be used with the following pipe types:
| JIS G 3452 |
Carbon steel pipes for piping systems |
| JIS G 3442 |
Galvanized steel pipe for water supply |
| JIS G 3443 |
Coated steel pipe for water supply, all kinds of steel
pipe with internaly resin coated |
| JIS K 6741 |
Hard polyvinyl chloride pipes |
| JIS K 6742 |
Polyvinyl chloride pipe for water supply |
| WSP 032 |
Coal tar epoxy coated steel pipe for wastewater |
| WSP 042 |
Hard polyvinyl chloride-lined steel pipe for wastewater |
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Chart
1: Product categories
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| Inquiries |
Piping Components Company
Tel.: +81-3-5765-4275
Inquiry Form |
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